ATcT [1, 2] enthalpies of formation based on version 1.172 of the Thermochemical Network [3]

Below is a list of 0 K and 298.15 K enthalpies of formation for all 3286 species included in version 1.172 (as of 09/01/2024).
This version of ATcT results[3] was generated by additional expansion of version 1.156 to include species relevant to a study of photodissociation of formamide[4].

The elements in their standard states are listed first; the listing order of the other species follows the actual order from the ATcT solution file, which roughly reflects the number of thermochemically-relevant determinations that include the species in question (highest first). The intent is to convey a very approximate indication of the robustness of the listed values, which is generally higher toward the top of the list and lower toward the bottom.

For species other than elements in their standard states, the Species Name acts as a link to the page itemizing the most important contributors to the provenance of its ATcT enthalpy of formation, other highly correlated chemical species, and high-leverage reactions in the Thermochemical Network.
(Please note that, as opposed to traditional sequential thermochemistry where the provenance of a given enthalpy of formation is typically a single measurement, the provenances of ATcT enthalpies of formation, which are obtained by analysing and solving a large Thermochemical Network, are normally quite distributed.)

Species:

(chemical formulas are case sensitive)

Exact Matches only:

Website functionality credits

The stoichiometry represents fractions as decimals,
e.g. 0.5 O2, 1 H2, 1 H2O would represent
1/2 O2 + H2 → H2O

Species Name	Image	Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units	Relative Molecular Mass	ATcT ID
Dihydrogen		0	0	exact		2.01588 ± 0.00014	1333-74-0*0
Helium		0	0	exact		4.0026020 ± 0.0000020	7440-59-7*0
Carbon		0	0	exact		12.01070 ± 0.00080	7440-44-0*500
Dinitrogen		0	0	exact		28.01348 ± 0.00014	7727-37-9*0
Dioxygen		0	0	exact		31.99880 ± 0.00060	7782-44-7*0
Difluorine		0	0	exact		37.9968064 ± 0.0000010	7782-41-4*0
Neon		0	0	exact		20.17970 ± 0.00060	7440-01-9*0
Silicon		0	0	exact		28.08550 ± 0.00030	7440-21-3*500
Sulfur		0	0	exact		32.0660 ± 0.0060	7704-34-9*500
Dichlorine		0	0	exact		70.9054 ± 0.0018	7782-50-5*0
Argon		0	0	exact		39.94800 ± 0.00100	7440-37-1*0
Dibromine		0	0	exact		159.8080 ± 0.0020	7726-95-6*500
Krypton		0	0	exact		83.8000 ± 0.1000	7439-90-9*0
Diiodine		0	0	exact		253.808940 ± 0.000060	7553-56-2*500
Xenon		0	0	exact		131.2900 ± 0.0200	7440-63-3*0
Platinum		0	0	exact		195.0780 ± 0.0020	7440-06-4*500
Radon		0	0	exact		222.0000 ± 0.1000	10043-92-2*0
Deuterium molecule		0	0	exact		4.02820355600 ± 0.00000000080	7782-39-0*0
Hydrogen atom		216.034	217.998	± 0.000	kJ/mol	1.007940 ± 0.000070	12385-13-6*0
Carbon		711.381	716.866	± 0.039	kJ/mol	12.01070 ± 0.00080	7440-44-0*0
Oxygen atom		246.844	249.229	± 0.0021	kJ/mol	15.99940 ± 0.00030	17778-80-2*0
Methane		-66.547	-74.516	± 0.043	kJ/mol	16.04246 ± 0.00085	74-82-8*0
Water		-286.276	-285.804	± 0.022	kJ/mol	18.01528 ± 0.00033	7732-18-5*500
Nitrogen atom		470.583	472.445	± 0.022	kJ/mol	14.006740 ± 0.000070	17778-88-0*0
Carbon dioxide		-393.111	-393.478	± 0.015	kJ/mol	44.00950 ± 0.00100	124-38-9*0
Hydron		1528.084	1530.047	± 0.000	kJ/mol	1.007391 ± 0.000070	12408-02-5*0
Water		-238.907	-241.810	± 0.022	kJ/mol	18.01528 ± 0.00033	7732-18-5*0
Ethane		-68.41	-84.03	± 0.12	kJ/mol	30.0690 ± 0.0017	74-84-0*0
Chlorine atom		119.621	121.302	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*0
Fluorine atom		77.254	79.360	± 0.017	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*0
Ethylene		60.89	52.38	± 0.11	kJ/mol	28.0532 ± 0.0016	74-85-1*0
Propane		-82.73	-105.01	± 0.15	kJ/mol	44.0956 ± 0.0025	74-98-6*0
Methyl		149.876	146.475	± 0.049	kJ/mol	15.03452 ± 0.00083	2229-07-4*0
Methanol		-189.91	-200.80	± 0.13	kJ/mol	32.04186 ± 0.00090	67-56-1*0
Ammonia		-38.564	-45.556	± 0.029	kJ/mol	17.03056 ± 0.00022	7664-41-7*0
Bromine atom		117.925	111.863	± 0.055	kJ/mol	79.90400 ± 0.00100	10097-32-2*0
Hydroxyl		37.274	37.514	± 0.022	kJ/mol	17.00734 ± 0.00031	3352-57-6*0
Formaldehyde		-105.381	-109.222	± 0.094	kJ/mol	30.02598 ± 0.00087	50-00-0*0
Acetylene		228.86	228.30	± 0.12	kJ/mol	26.0373 ± 0.0016	74-86-2*0
Carbon monoxide		-113.794	-110.514	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*0
Ethanol		-217.20	-234.91	± 0.20	kJ/mol	46.0684 ± 0.0017	64-17-5*0
Hydrogen chloride		-91.988	-92.172	± 0.0062	kJ/mol	36.46064 ± 0.00090	7647-01-0*0
Benzene		100.68	83.17	± 0.21	kJ/mol	78.1118 ± 0.0048	71-43-2*0
Propene		34.89	20.05	± 0.18	kJ/mol	42.0797 ± 0.0024	115-07-1*0
Hydrogen fluoride		-272.679	-272.726	± 0.018	kJ/mol	20.006343 ± 0.000070	7664-39-3*0
Ethyl		131.49	120.73	± 0.20	kJ/mol	29.0611 ± 0.0016	2025-56-1*0
Hydrogen cyanide		129.677	129.293	± 0.087	kJ/mol	27.02538 ± 0.00081	74-90-8*0
Iodine		107.157	106.757	± 0.0021	kJ/mol	126.904470 ± 0.000030	14362-44-8*0
Hydrogen bromide		-27.52	-35.36	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*0
Nitric oxide		90.627	91.131	± 0.064	kJ/mol	30.00614 ± 0.00031	10102-43-9*0
Acetaldehyde		-154.88	-165.41	± 0.22	kJ/mol	44.0526 ± 0.0017	75-07-0*0
Propyne		192.70	185.55	± 0.20	kJ/mol	40.0639 ± 0.0024	74-99-7*0
Chloromethane		-74.67	-82.60	± 0.17	kJ/mol	50.4872 ± 0.0012	74-87-3*0
Silicon		450.34	454.68	± 0.56	kJ/mol	28.08550 ± 0.00030	7440-21-3*0
Dioxidanyl		15.06	12.15	± 0.14	kJ/mol	33.00674 ± 0.00060	3170-83-0*0
Acetone		-199.94	-216.88	± 0.26	kJ/mol	58.0791 ± 0.0025	67-64-1*0
Hydroxyde		-139.068	-139.034	± 0.022	kJ/mol	17.00789 ± 0.00031	14280-30-9*0
Methylamine		-6.45	-21.16	± 0.22	kJ/mol	31.05714 ± 0.00088	74-89-5*0
Allene		197.46	190.01	± 0.22	kJ/mol	40.0639 ± 0.0024	463-49-0*0
Nitrogen dioxide		36.866	34.059	± 0.064	kJ/mol	46.00554 ± 0.00060	10102-44-0*0
Hydrogen iodide		28.645	26.470	± 0.036	kJ/mol	127.912410 ± 0.000076	10034-85-2*0
Vinyl		301.25	297.21	± 0.27	kJ/mol	27.0452 ± 0.0016	2669-89-8*0
Hydrogen peroxide		-129.426	-135.412	± 0.057	kJ/mol	34.01468 ± 0.00062	7722-84-1*0
Methylene		391.066	391.612	± 0.093	kJ/mol	14.02658 ± 0.00081	2465-56-7*1
Fluoromethane		-227.45	-235.48	± 0.24	kJ/mol	34.03292 ± 0.00083	593-53-3*0
n-Butane		-98.25	-125.56	± 0.18	kJ/mol	58.1222 ± 0.0033	106-97-8*0
Toluene		73.35	50.06	± 0.31	kJ/mol	92.1384 ± 0.0056	108-88-3*0
Silane		42.66	33.04	± 0.63	kJ/mol	32.11726 ± 0.00041	7803-62-5*0
Methylene		428.73	429.14	± 0.11	kJ/mol	14.02658 ± 0.00081	2465-56-7*2
Ozone		144.407	141.744	± 0.039	kJ/mol	47.99820 ± 0.00090	10028-15-6*0
1,3-Butadiene		125.61	111.14	± 0.29	kJ/mol	54.0904 ± 0.0032	106-99-0*0
Fluoride		-250.911	-249.126	± 0.017	kJ/mol	18.99895178 ± 0.00000050	16984-48-8*0
Ammonium hydroxide			-366.38	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*839
Ketene		-45.34	-48.40	± 0.11	kJ/mol	42.0367 ± 0.0016	463-51-4*0
Nitrilomethyl		436.72	440.01	± 0.14	kJ/mol	26.01744 ± 0.00080	2074-87-5*0
Bromomethane		-20.48	-35.88	± 0.19	kJ/mol	94.9385 ± 0.0013	74-83-9*0
Methoxy		29.02	21.64	± 0.26	kJ/mol	31.03392 ± 0.00088	2143-68-2*0
Phenyl		352.61	339.25	± 0.60	kJ/mol	77.1039 ± 0.0048	2396-01-2*0
Hydrogen chloride			-165.756	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*828
Acetonitrile		81.14	74.08	± 0.23	kJ/mol	41.0520 ± 0.0016	75-05-8*0
Hydroxymethyl		-10.07	-16.38	± 0.28	kJ/mol	31.03392 ± 0.00088	2597-43-5*0
Sulfur dioxide		-294.20	-296.74	± 0.13	kJ/mol	64.0648 ± 0.0060	7446-09-5*0
Hydrogen iodide			-56.641	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*844
Formic acid		-371.03	-378.35	± 0.21	kJ/mol	46.0254 ± 0.0010	64-18-6*1
Hydrogen fluoride			-303.201	± 0.099	kJ/mol	20.006343 ± 0.000070	7664-39-3*590
Methoxide		-122.37	-130.10	± 0.26	kJ/mol	31.03447 ± 0.00088	3315-60-4*0
Propargyl		354.08	351.49	± 0.31	kJ/mol	39.0559 ± 0.0024	2932-78-7*0
iso-Butane		-105.88	-134.48	± 0.27	kJ/mol	58.1222 ± 0.0033	75-28-5*0
Acetic acid			-484.66	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*828
Hypochlorous acid		-73.844	-76.784	± 0.023	kJ/mol	52.46004 ± 0.00095	7790-92-3*0
Hydrogen bromide			-120.26	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*842
Formic acid			-425.29	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*828
Amidogen		188.92	186.03	± 0.11	kJ/mol	16.02262 ± 0.00016	13770-40-6*0
Tetrafluoromethane		-927.65	-933.61	± 0.23	kJ/mol	88.00431 ± 0.00080	75-73-0*0
Formyl		41.389	41.763	± 0.094	kJ/mol	29.01804 ± 0.00086	2597-44-6*0
Acetic acid		-418.49	-432.66	± 0.36	kJ/mol	60.0520 ± 0.0017	64-19-7*1
n-Propyl		118.44	101.04	± 0.39	kJ/mol	43.0877 ± 0.0024	2143-61-5*0
Cyclopentadiene		151.87	134.75	± 0.49	kJ/mol	66.1011 ± 0.0040	542-92-7*0
Dibromine		45.70	30.90	± 0.11	kJ/mol	159.8080 ± 0.0020	7726-95-6*0
Diiodine		65.497	62.417	± 0.0041	kJ/mol	253.808940 ± 0.000060	7553-56-2*0
iso-Propyl		105.65	88.78	± 0.38	kJ/mol	43.0877 ± 0.0024	2025-55-0*0
Formamide		-178.63	-188.99	± 0.34	kJ/mol	45.04066 ± 0.00088	75-12-7*0
Ethynyl		563.73	567.85	± 0.15	kJ/mol	25.0293 ± 0.0016	2122-48-7*0
Cyclopropane		71.04	53.91	± 0.32	kJ/mol	42.0797 ± 0.0024	75-19-4*0
Allyl		179.89	168.17	± 0.33	kJ/mol	41.0718 ± 0.0024	1981-80-2*0
Acetyl		-3.62	-10.18	± 0.29	kJ/mol	43.0446 ± 0.0016	3170-69-2*0
Chloroethane		-96.96	-111.55	± 0.25	kJ/mol	64.5138 ± 0.0019	75-00-3*0
Chloride		-228.953	-227.346	± 0.0021	kJ/mol	35.45325 ± 0.00090	16887-00-6*0
Methoxymethane		-166.39	-183.90	± 0.35	kJ/mol	46.0684 ± 0.0017	115-10-6*0
Ethenol		-113.32	-124.44	± 0.38	kJ/mol	44.0526 ± 0.0017	557-75-5*1
Ethylium		915.16	903.08	± 0.29	kJ/mol	29.0606 ± 0.0016	14936-94-8*0
Methanimine		96.38	88.47	± 0.34	kJ/mol	29.04126 ± 0.00083	2053-29-4*0
Ethylamine		-28.05	-49.82	± 0.45	kJ/mol	45.0837 ± 0.0017	75-04-7*0
Fluoroform		-689.29	-696.24	± 0.40	kJ/mol	70.01385 ± 0.00080	75-46-7*0
Oxomethylium		827.765	827.180	± 0.095	kJ/mol	29.01749 ± 0.00086	17030-74-9*0
Trifluoromethyl		-465.15	-467.95	± 0.42	kJ/mol	69.00591 ± 0.00080	2264-21-3*0
Methylidyne		592.967	596.301	± 0.081	kJ/mol	13.01864 ± 0.00080	3315-37-5*0
Methyl hydroperoxide		-114.86	-127.68	± 0.43	kJ/mol	48.0413 ± 0.0010	3031-73-0*0
Phenol		-74.35	-92.94	± 0.62	kJ/mol	94.1112 ± 0.0048	108-95-2*0
Tetrachloromethane		-89.31	-91.48	± 0.41	kJ/mol	153.8215 ± 0.0037	56-23-5*0
Benzaldehyde		-19.18	-36.97	± 0.68	kJ/mol	106.1219 ± 0.0056	100-52-7*0
Bromide		-206.612	-212.674	± 0.055	kJ/mol	79.90455 ± 0.00100	24959-67-9*0
Oxonium		605.89	599.13	± 0.17	kJ/mol	19.02267 ± 0.00037	13968-08-6*0
Hypobromous acid		-51.27	-61.75	± 0.48	kJ/mol	96.9113 ± 0.0010	13517-11-8*0
Methylperoxy		22.52	13.07	± 0.34	kJ/mol	47.0333 ± 0.0010	2143-58-0*0
Cyanoacetylene		372.22	373.96	± 0.57	kJ/mol	51.0468 ± 0.0024	1070-71-9*0
Chlorooxidanyl		101.124	101.716	± 0.035	kJ/mol	51.45210 ± 0.00095	14989-30-1*0
Iodide		-187.996	-188.396	± 0.0021	kJ/mol	126.905019 ± 0.000030	20461-54-5*0
Dioxymethyl	$[O-]\[O+]=C$	111.74	104.73	± 0.56	kJ/mol	46.0254 ± 0.0010	56077-92-0*0
Nitric acid		-124.46	-134.17	± 0.17	kJ/mol	63.01288 ± 0.00091	7697-37-2*0
Hydroxyformyl		-181.15	-184.11	± 0.40	kJ/mol	45.0174 ± 0.0010	2564-86-5*1
Vinyl chloride		29.38	21.80	± 0.27	kJ/mol	62.4979 ± 0.0018	75-01-4*0
Imidogen		358.75	358.79	± 0.16	kJ/mol	15.014680 ± 0.000099	13774-92-0*0
1-Hydroxyethyl		-42.72	-56.15	± 0.46	kJ/mol	45.0605 ± 0.0017	2348-46-1*1
Vinylacetylene		296.44	289.68	± 0.52	kJ/mol	52.0746 ± 0.0032	689-97-4*0
Sulfur trioxide		-389.75	-395.50	± 0.24	kJ/mol	80.0642 ± 0.0061	7446-11-9*0
Oxygen atom anion		105.868	108.096	± 0.0021	kJ/mol	15.99995 ± 0.00030	14337-01-0*0
Oxirane		-39.73	-52.29	± 0.33	kJ/mol	44.0526 ± 0.0017	75-21-8*0
Ethoxide		-163.78	-178.72	± 0.44	kJ/mol	45.0610 ± 0.0017	16331-64-9*0
Iodomethane		24.47	14.94	± 0.17	kJ/mol	141.93899 ± 0.00083	74-88-4*0
1,3-Butadiyne		458.36	460.08	± 0.48	kJ/mol	50.0587 ± 0.0032	460-12-8*0
Isocyanic acid		-115.94	-118.93	± 0.28	kJ/mol	43.02478 ± 0.00086	75-13-8*0
Cyanamide		141.60	135.58	± 0.78	kJ/mol	42.04006 ± 0.00082	420-04-2*0
Difluorophosgene		-603.35	-606.45	± 0.40	kJ/mol	66.00691 ± 0.00085	353-50-4*0
Methylium		1099.349	1095.405	± 0.045	kJ/mol	15.03397 ± 0.00083	14531-53-4*0
Hypofluorous acid		-84.38	-87.28	± 0.19	kJ/mol	36.00574 ± 0.00031	14034-79-8*0
Nitric acid			-206.23	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*839
Isobutene		4.30	-16.77	± 0.32	kJ/mol	56.1063 ± 0.0032	115-11-7*0
2-Hydroxyethyl		-12.90	-26.16	± 0.48	kJ/mol	45.0605 ± 0.0017	4422-54-2*1
N-Methylenemethanamine		94.59	79.68	± 0.67	kJ/mol	43.0678 ± 0.0016	1761-67-7*0
Dichloromethane		-86.86	-93.72	± 0.33	kJ/mol	84.9320 ± 0.0020	75-09-2*0
Chlorobenzene		67.26	52.31	± 0.61	kJ/mol	112.5566 ± 0.0049	108-90-7*0
Sulfur		276.83	279.08	± 0.14	kJ/mol	32.0660 ± 0.0060	7704-34-9*0
Hydrogen chloride			-166.450	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*834
Methylamidogen		187.98	177.33	± 0.40	kJ/mol	30.04920 ± 0.00085	15622-51-2*0
Isocyanomethane		183.80	177.25	± 0.47	kJ/mol	41.0520 ± 0.0016	593-75-9*0
1,2-Butadiene		176.04	162.54	± 0.42	kJ/mol	54.0904 ± 0.0032	590-19-2*0
Benzyl		230.13	211.32	± 0.51	kJ/mol	91.1305 ± 0.0056	2154-56-5*0
Cyclopentadienyl		275.59	262.48	± 0.80	kJ/mol	65.0932 ± 0.0040	2143-53-5*0
Ethynide		277.29	280.70	± 0.18	kJ/mol	25.0299 ± 0.0016	29075-95-4*0
Dimethylamine		4.63	-17.01	± 0.47	kJ/mol	45.0837 ± 0.0017	124-40-3*0
Trimethylsilane		-125.8	-151.9	± 1.5	kJ/mol	74.1970 ± 0.0025	993-07-7*0
Hydrogen sulfide		-17.37	-20.29	± 0.18	kJ/mol	34.0819 ± 0.0060	7783-06-4*0
Hydride		143.264	145.228	± 0.000	kJ/mol	1.008489 ± 0.000070	12184-88-2*0
Cyanogen chloride		135.13	135.83	± 0.43	kJ/mol	61.4701 ± 0.0012	506-77-4*0
Phenide		244.25	230.83	± 0.38	kJ/mol	77.1044 ± 0.0048	30922-78-2*0
Cyclopropene		292.57	283.84	± 0.41	kJ/mol	40.0639 ± 0.0024	2781-85-3*0
Methyl formate		-346.85	-359.90	± 0.61	kJ/mol	60.0520 ± 0.0017	107-31-3*1
Trihydrogen cation		1110.304	1106.696	± 0.013	kJ/mol	3.02327 ± 0.00021	28132-48-1*0
Fluoromethylidyne		243.16	246.76	± 0.11	kJ/mol	31.00910 ± 0.00080	3889-75-6*0
Acrolein		-55.13	-65.53	± 0.64	kJ/mol	56.0633 ± 0.0024	107-02-8*1
Sulfuric acid			-887.53	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*828
Tetrafluorosilane		-1608.76	-1614.27	± 0.52	kJ/mol	104.07911 ± 0.00030	7783-61-1*0
Oxygen atom cation		1560.786	1562.643	± 0.0021	kJ/mol	15.99885 ± 0.00030	14581-93-2*0
Ammonium		643.03	631.72	± 0.20	kJ/mol	18.03795 ± 0.00029	14798-03-9*0
Nitrous acid		-72.987	-79.131	± 0.077	kJ/mol	47.01348 ± 0.00061	7782-77-6*1
Hydroxymethylium		717.79	709.85	± 0.17	kJ/mol	31.03337 ± 0.00088	18682-95-6*0
Cyanide		63.973	67.259	± 0.091	kJ/mol	26.01799 ± 0.00080	57-12-5*0
2-Butyne		159.56	146.59	± 0.45	kJ/mol	54.0904 ± 0.0032	503-17-3*0
Propynylidene		543.70	546.70	± 0.58	kJ/mol	38.0480 ± 0.0024	67152-18-5*1
Difluoromethane		-443.33	-450.94	± 0.35	kJ/mol	52.02339 ± 0.00081	75-10-5*0
Vinyl bromide		88.86	74.05	± 0.54	kJ/mol	106.9492 ± 0.0019	593-60-2*0
Silyl		204.71	199.23	± 0.80	kJ/mol	31.10932 ± 0.00037	13765-44-1*0
Sulfurous acid			-617.30	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*898
Oxygen difluoride		26.80	24.55	± 0.22	kJ/mol	53.99621 ± 0.00030	7783-41-7*0
Hypochlorite		-118.60	-118.33	± 0.13	kJ/mol	51.45265 ± 0.00095	14380-61-1*0
Hypoiodous acid		-53.6	-58.3	± 2.8	kJ/mol	143.91181 ± 0.00031	14332-21-9*0
Nitrosyl hydride		109.94	106.97	± 0.11	kJ/mol	31.01408 ± 0.00032	14332-28-6*0
Butatriene		328.40	322.14	± 0.53	kJ/mol	52.0746 ± 0.0032	2873-50-9*0
Ethoxy		1.35	-12.55	± 0.42	kJ/mol	45.0605 ± 0.0017	2154-50-9*51
Acetone enol		-151.28	-168.56	± 0.68	kJ/mol	58.0791 ± 0.0025	29456-04-0*1
Phosgene		-217.49	-219.18	± 0.24	kJ/mol	98.9155 ± 0.0020	75-44-5*0
1-Hydroxy-2-propanone		-354.44	-373.83	± 0.84	kJ/mol	74.0785 ± 0.0025	116-09-6*11
Cyanoamidogen		322.70	320.21	± 0.63	kJ/mol	41.03212 ± 0.00082	12347-01-2*1
Chloroform		-94.54	-99.44	± 0.39	kJ/mol	119.3767 ± 0.0028	67-66-3*0
Tetrafluoroethylene		-670.68	-674.08	± 0.47	kJ/mol	100.0150 ± 0.0016	116-14-3*0
Benzoyl		138.84	125.30	± 0.98	kJ/mol	105.1140 ± 0.0056	2652-65-5*0
Acrylonitrile		193.99	187.23	± 0.60	kJ/mol	53.0627 ± 0.0024	107-13-1*1
Silanol		-271.0	-282.7	± 1.2	kJ/mol	48.11666 ± 0.00051	14475-38-8*0
Naphthalene		171.16	147.69	± 0.55	kJ/mol	128.1705 ± 0.0080	91-20-3*0
1,2-Propadiene-1,3-diylidene		814.37	823.33	± 0.49	kJ/mol	36.0321 ± 0.0024	12075-35-3*0
Methylidyne		664.70	668.03	± 0.52	kJ/mol	13.01864 ± 0.00080	3315-37-5*2
Vinyl anion		236.98	232.56	± 0.68	kJ/mol	27.0458 ± 0.0016	25012-81-1*0
Cyanogen bromide		186.8	180.2	± 1.4	kJ/mol	105.9214 ± 0.0013	506-68-3*0
n-Butyl		103.07	80.57	± 0.60	kJ/mol	57.1143 ± 0.0033	2492-36-6*0
neo-Pentane		-134.27	-167.15	± 0.38	kJ/mol	72.1488 ± 0.0041	463-82-1*0
trans-2-Butene		9.66	-10.90	± 0.28	kJ/mol	56.1063 ± 0.0032	624-64-6*0
1-Butene		21.22	0.26	± 0.33	kJ/mol	56.1063 ± 0.0032	106-98-9*0
n-Hexane		-129.92	-166.79	± 0.32	kJ/mol	86.1754 ± 0.0049	110-54-3*0
Ethyl hydroperoxide		-142.69	-161.12	± 0.72	kJ/mol	62.0678 ± 0.0018	3031-74-1*0
Ethylperoxy		-6.25	-22.27	± 0.64	kJ/mol	61.0599 ± 0.0017	3170-61-4*3
Formate		-463.10	-466.75	± 0.55	kJ/mol	45.0180 ± 0.0010	71-47-6*0
Propionaldehyde		-171.11	-186.52	± 0.20	kJ/mol	58.0791 ± 0.0025	123-38-6*0
Methyl acetate		-394.15	-413.01	± 0.56	kJ/mol	74.0785 ± 0.0025	79-20-9*1
Aziridine		143.56	127.03	± 0.85	kJ/mol	43.0678 ± 0.0016	151-56-4*0
Tetrabromomethane		144.72	115.02	± 0.74	kJ/mol	331.6267 ± 0.0041	558-13-4*0
Ethyl bromide		-41.00	-62.94	± 0.24	kJ/mol	108.9651 ± 0.0019	74-96-4*0
Methyl nitrite		-55.42	-67.21	± 0.43	kJ/mol	61.0401 ± 0.0010	624-91-9*2
Propadienone		132.21	130.57	± 0.61	kJ/mol	54.0474 ± 0.0024	61244-93-7*0
Chlorine fluoride		-55.622	-55.717	± 0.030	kJ/mol	54.45110 ± 0.00090	7790-89-8*0
Diazynium		1042.57	1038.96	± 0.67	kJ/mol	29.02087 ± 0.00016	12357-66-3*0
Nitrite		-182.63	-185.43	± 0.46	kJ/mol	46.00609 ± 0.00060	14797-65-0*0
Hydroxylamine		-33.06	-43.44	± 0.42	kJ/mol	33.02996 ± 0.00037	7803-49-8*1
Aminomethyl		159.41	149.57	± 0.35	kJ/mol	30.04920 ± 0.00085	10507-29-6*0
cis-2-Butene	$C/C=C\C$	14.41	-6.87	± 0.38	kJ/mol	56.1063 ± 0.0032	590-18-1*0
1-Butyne		180.40	166.82	± 0.56	kJ/mol	54.0904 ± 0.0032	107-00-6*0
Methanetetraylbisamidogen		451.36	451.77	± 0.40	kJ/mol	40.02418 ± 0.00081	2669-76-3*0
Vinyl fluoride		-134.52	-142.33	± 0.45	kJ/mol	46.0436 ± 0.0016	75-02-5*0
Phenylium		1149.28	1136.50	± 0.85	kJ/mol	77.1034 ± 0.0048	17333-73-2*0
Indene		183.77	159.88	± 0.72	kJ/mol	116.1598 ± 0.0072	95-13-6*0
Fluorobenzene		-96.05	-111.73	± 0.39	kJ/mol	96.1023 ± 0.0048	462-06-6*0
Nitromethane		-60.75	-74.65	± 0.42	kJ/mol	61.0401 ± 0.0010	75-52-5*0
Fluorooxidanyl		110.28	110.90	± 0.14	kJ/mol	34.99780 ± 0.00030	12061-70-0*0
Nitrous oxide		86.017	82.588	± 0.096	kJ/mol	44.01288 ± 0.00033	10024-97-2*0
Azanide		114.65	111.77	± 0.29	kJ/mol	16.02317 ± 0.00016	17655-31-1*0
Methanium		922.00	911.75	± 0.44	kJ/mol	17.04985 ± 0.00087	15135-49-6*0
Peroxynitrous acid		-5.74	-14.18	± 0.35	kJ/mol	63.01288 ± 0.00091	14691-52-2*3
Ethylidene		361.28	354.28	± 0.48	kJ/mol	28.0532 ± 0.0016	4218-50-2*1
Ethylidene		373.63	366.40	± 0.56	kJ/mol	28.0532 ± 0.0016	4218-50-2*2
Cyanomethyl		262.83	259.95	± 0.53	kJ/mol	40.0440 ± 0.0016	2932-82-3*0
Cyanic fluoride		8.48	8.81	± 0.74	kJ/mol	45.01584 ± 0.00080	1495-50-7*0
Propadienylidene		554.44	555.58	± 0.39	kJ/mol	38.0480 ± 0.0024	60731-10-4*0
t-Butyl		75.34	50.05	± 0.68	kJ/mol	57.1143 ± 0.0033	1605-73-8*0
n-Pentane		-114.19	-146.06	± 0.29	kJ/mol	72.1488 ± 0.0041	109-66-0*0
Methanediol		-378.47	-392.42	± 0.62	kJ/mol	48.0413 ± 0.0010	463-57-0*1
Formic acid		-354.69	-361.80	± 0.37	kJ/mol	46.0254 ± 0.0010	64-18-6*2
Cyanooxidanyl		126.96	127.43	± 0.33	kJ/mol	42.01684 ± 0.00086	22400-26-6*0
Ethenamine		69.37	54.81	± 0.66	kJ/mol	43.0678 ± 0.0016	593-67-9*0
Fluoroethane		-257.25	-272.12	± 0.35	kJ/mol	48.0595 ± 0.0016	353-36-6*0
Chlorotrifluoromethane		-704.27	-709.38	± 0.56	kJ/mol	104.4586 ± 0.0012	75-72-9*0
Pyridine		157.32	140.52	± 0.40	kJ/mol	79.0999 ± 0.0040	110-86-1*0
Carbamoyl		-7.74	-14.14	± 0.72	kJ/mol	44.03272 ± 0.00087	2858-51-7*0
Acrylonitrile		193.99	187.23	± 0.60	kJ/mol	53.0627 ± 0.0024	107-13-1*0
1,2,3-Butatrien-1-yl		497.52	497.54	± 0.66	kJ/mol	51.0666 ± 0.0032	22112-56-7*0
Disilane		92.0	75.9	± 1.3	kJ/mol	62.21864 ± 0.00073	1590-87-0*0
2,4-Hexadiyne		380.33	370.31	± 0.82	kJ/mol	78.1118 ± 0.0048	2809-69-0*0
Bromooxidanyl		131.22	123.68	± 0.28	kJ/mol	95.9034 ± 0.0010	15656-19-6*0
Aminooxy		70.65	64.05	± 0.62	kJ/mol	32.02202 ± 0.00034	13408-29-2*0
Hydroxyamidogen		101.26	94.42	± 0.84	kJ/mol	32.02202 ± 0.00034	13940-32-4*1
Dioxygen cation		1164.585	1165.221	± 0.0092	kJ/mol	31.99825 ± 0.00060	12185-07-8*0
Ethynylene		819.961	828.427	± 0.082	kJ/mol	24.0214 ± 0.0016	12070-15-4*0
Ethanide		155.42	144.34	± 0.87	kJ/mol	29.0616 ± 0.0016	25013-41-6*0
Vinylium		1119.22	1115.77	± 0.53	kJ/mol	27.0447 ± 0.0016	14604-48-9*0
Vinylidene		411.21	412.12	± 0.30	kJ/mol	26.0373 ± 0.0016	2143-69-3*0
Hydroxymethylene		112.70	108.93	± 0.27	kJ/mol	30.02598 ± 0.00087	19710-56-6*1
Carbonic acid		-602.28	-612.46	± 0.55	kJ/mol	62.0248 ± 0.0012	463-79-6*1
Peroxyformic acid		-279.25	-288.60	± 0.63	kJ/mol	62.0248 ± 0.0012	107-32-4*1
1,2-Propadienyl anion		266.07	263.01	± 0.63	kJ/mol	39.0565 ± 0.0024	64066-06-4*0
1-Propanol		-231.15	-254.99	± 0.20	kJ/mol	60.0950 ± 0.0025	71-23-8*0
Cyclopentane		-43.39	-75.96	± 0.38	kJ/mol	70.1329 ± 0.0041	287-92-3*0
Vinoxy		23.01	16.20	± 0.56	kJ/mol	43.0446 ± 0.0016	6912-06-7*0
Phenolate		-145.96	-161.42	± 0.81	kJ/mol	93.1038 ± 0.0048	3229-70-7*0
(1E)-Ethanimine		55.79	39.58	± 0.72	kJ/mol	43.0678 ± 0.0016	56003-81-7*0
Diazomethyl		467.84	465.28	± 0.68	kJ/mol	41.03212 ± 0.00082	20813-32-5*1
Bromotrifluoromethane		-638.64	-650.76	± 0.39	kJ/mol	148.9099 ± 0.0013	75-63-8*0
Bromoform		80.92	54.77	± 0.71	kJ/mol	252.7306 ± 0.0031	75-25-2*0
Tetrahedrane		547.69	539.28	± 0.91	kJ/mol	52.0746 ± 0.0032	157-39-1*0
Silylene		271.60	269.94	± 0.81	kJ/mol	30.10138 ± 0.00033	13825-90-6*2
Water			-285.804	± 0.022	kJ/mol	18.01528 ± 0.00033	7732-18-5*590
Trioxidane		-81.76	-90.60	± 0.40	kJ/mol	50.01408 ± 0.00091	14699-99-1*1
Chlorine dioxide		101.42	98.95	± 0.29	kJ/mol	67.4515 ± 0.0011	10049-04-4*0
Hypobromite		-95.99	-103.47	± 0.53	kJ/mol	95.9039 ± 0.0010	14380-62-2*0
Nitrogen trifluoride		-125.85	-131.56	± 0.55	kJ/mol	71.001950 ± 0.000070	7783-54-2*0
(E)-Diazene		207.17	200.03	± 0.40	kJ/mol	30.02936 ± 0.00020	15626-43-4*0
(E)-Iminomethyl		275.79	272.18	± 0.56	kJ/mol	28.03332 ± 0.00082	54980-10-8*0
Cyanogen		308.17	310.12	± 0.41	kJ/mol	52.0349 ± 0.0016	460-19-5*0
Peroxyformyl		-100.43	-105.73	± 0.67	kJ/mol	61.0168 ± 0.0012	56240-83-6*1
1-Methylethenyl		263.03	252.63	± 0.61	kJ/mol	41.0718 ± 0.0024	15552-77-9*0
Cyclopentene		59.91	35.65	± 0.43	kJ/mol	68.1170 ± 0.0040	142-29-0*0
Trimethylamine		2.64	-26.21	± 0.79	kJ/mol	59.1103 ± 0.0025	75-50-3*0
Diazomethane		273.61	267.34	± 0.86	kJ/mol	42.04006 ± 0.00082	334-88-3*0
Dichloromethylene		229.87	231.05	± 0.64	kJ/mol	82.9161 ± 0.0020	1605-72-7*2
Trifluoromethylium		409.80	406.59	± 0.40	kJ/mol	69.00536 ± 0.00080	18851-76-8*0
Acetonyl		-18.44	-32.04	± 0.64	kJ/mol	57.0712 ± 0.0024	3122-07-4*0
Ethyl nitrite		-81.16	-99.89	± 0.87	kJ/mol	75.0666 ± 0.0017	109-95-5*1
Methylketene		-54.12	-63.59	± 0.63	kJ/mol	56.0633 ± 0.0024	6004-44-0*0
Disilene		288.8	280.2	± 1.7	kJ/mol	60.20276 ± 0.00066	15435-77-5*2
1,3-Pentadiyne		418.16	413.94	± 0.65	kJ/mol	64.0853 ± 0.0040	4911-55-1*0
Disulfur		127.37	127.68	± 0.27	kJ/mol	64.1320 ± 0.0120	23550-45-0*0
Sulfuric acid		-811.89	-813.88	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*500
Dimethyl sulfide		-20.24	-36.75	± 0.35	kJ/mol	62.1350 ± 0.0062	75-18-3*0
Hydroxyde			-229.761	± 0.023	kJ/mol	17.00789 ± 0.00031	14280-30-9*800
Dioxidanide		-88.92	-91.58	± 0.34	kJ/mol	33.00729 ± 0.00060	14691-59-9*0
Azido radical		452.38	449.79	± 0.59	kJ/mol	42.02022 ± 0.00021	12596-60-0*0
Nitrosyl ion		984.494	984.489	± 0.064	kJ/mol	30.00559 ± 0.00031	14452-93-8*0
Ozonide		-58.47	-60.83	± 0.21	kJ/mol	47.99875 ± 0.00090	12596-80-4*0
Hydroxyoxomethylium		600.69	597.60	± 0.43	kJ/mol	45.0169 ± 0.0010	638-71-1*0
Hydrazoic acid		297.99	291.69	± 0.48	kJ/mol	43.02816 ± 0.00022	7782-79-8*0
Methylidyne		592.967	596.301	± 0.081	kJ/mol	13.01864 ± 0.00080	3315-37-5*1
Acetylium		666.68	659.40	± 0.42	kJ/mol	43.0441 ± 0.0016	15762-07-9*0
Aminomethylium		763.61	751.64	± 0.53	kJ/mol	30.04865 ± 0.00085	488821-23-4*0
Hydrogen isocyanide		192.06	192.44	± 0.32	kJ/mol	27.02538 ± 0.00081	6914-07-4*0
Chloroacetylene		229.32	230.19	± 0.45	kJ/mol	60.4820 ± 0.0018	593-63-5*0
Fluoroacetylene		104.97	105.68	± 0.39	kJ/mol	44.0277 ± 0.0016	2713-09-9*0
iso-Propylium		822.97	805.89	± 0.23	kJ/mol	43.0871 ± 0.0024	19252-53-0*0
1-Propenyl		278.19	267.34	± 0.63	kJ/mol	41.0718 ± 0.0024	6067-68-1*2
1-Hydroxyethylium		608.87	594.45	± 0.38	kJ/mol	45.0600 ± 0.0017	18682-96-7*1
Difluorodioxidane		35.37	31.64	± 0.40	kJ/mol	69.99561 ± 0.00060	7783-44-0*0
Ketenyl		177.10	178.19	± 0.54	kJ/mol	41.0287 ± 0.0016	51095-15-9*0
Hydroxymethoxy		-159.58	-169.54	± 0.84	kJ/mol	47.0333 ± 0.0010	72144-78-6*3
Formic acid		-371.03	-378.32	± 0.21	kJ/mol	46.0254 ± 0.0010	64-18-6*0
1-Butanol		-244.51	-274.76	± 0.24	kJ/mol	74.1216 ± 0.0033	71-36-3*0
Acetic acid		-397.69	-412.09	± 0.51	kJ/mol	60.0520 ± 0.0017	64-19-7*2
Glycolaldehyde		-304.31	-317.58	± 0.89	kJ/mol	60.0520 ± 0.0017	141-46-8*11
Methyl formate		-326.6	-339.1	± 1.1	kJ/mol	60.0520 ± 0.0017	107-31-3*2
Glyoxal		-207.84	-213.48	± 0.55	kJ/mol	58.0361 ± 0.0017	107-22-2*1
(Methylamino)methyl		168.77	152.32	± 0.71	kJ/mol	44.0758 ± 0.0017	31277-24-4*0
Diazirinyl		491.06	487.67	± 0.96	kJ/mol	41.03212 ± 0.00082	69967-71-1*1
Diazirine		320.7	313.0	± 1.1	kJ/mol	42.04006 ± 0.00082	157-22-2*0
Trichloromethyl		73.76	73.28	± 0.84	kJ/mol	118.3688 ± 0.0028	3170-80-7*0
1,1-Dichloroethane		-120.17	-132.95	± 0.43	kJ/mol	98.9586 ± 0.0024	75-34-3*0
Bromobenzene		127.0	104.9	± 1.3	kJ/mol	157.0079 ± 0.0049	108-86-1*0
Phenylethene		169.89	148.55	± 0.51	kJ/mol	104.1491 ± 0.0064	100-42-5*0
Phenylacetylene		332.78	317.62	± 0.69	kJ/mol	102.1332 ± 0.0064	536-74-3*0
Phenoxy		71.50	56.22	± 0.81	kJ/mol	93.1033 ± 0.0048	2122-46-5*0
Acetophenone		-60.74	-83.92	± 0.98	kJ/mol	120.1485 ± 0.0064	98-86-2*0
Nitrosomethane		80.95	71.04	± 0.91	kJ/mol	45.04066 ± 0.00088	865-40-7*0
Isocyanoacetylene		484.77	486.99	± 0.98	kJ/mol	51.0468 ± 0.0024	66723-45-3*0
Cyclobutadiene		436.54	428.08	± 0.63	kJ/mol	52.0746 ± 0.0032	1120-53-2*0
Fulvene		232.1	216.0	± 1.1	kJ/mol	78.1118 ± 0.0048	497-20-1*0
Disilanyl		242.4	230.4	± 1.5	kJ/mol	61.21070 ± 0.00069	73151-72-1*0
Silanone		-93.78	-99.12	± 0.99	kJ/mol	46.10078 ± 0.00045	22755-01-7*0
Silyloxy		8.5	0.6	± 1.4	kJ/mol	47.10872 ± 0.00047	81429-20-1*0
Sulfanyl		142.81	143.26	± 0.18	kJ/mol	33.0739 ± 0.0060	13940-21-1*0
Methanethiol		-10.39	-20.66	± 0.46	kJ/mol	48.1085 ± 0.0061	74-93-1*0
Chlorous acid		25.76	20.71	± 0.63	kJ/mol	68.4594 ± 0.0011	13898-47-0*0
Iodooxidanyl		127.05	125.12	± 0.82	kJ/mol	142.90387 ± 0.00030	14696-98-1*0
Iodotrifluoromethane		-583.20	-589.11	± 0.45	kJ/mol	195.91038 ± 0.00080	2314-97-8*0
Carbon monoxide cation		1238.315	1241.595	± 0.026	kJ/mol	28.00955 ± 0.00085	12144-04-6*0
Hydrazine		111.75	97.60	± 0.44	kJ/mol	32.04524 ± 0.00031	302-01-2*0
Nitrate		-299.73	-306.28	± 0.22	kJ/mol	62.00549 ± 0.00090	14797-55-8*0
Fluorodioxidanyl		26.87	25.16	± 0.26	kJ/mol	50.99720 ± 0.00060	15499-23-7*0
Methanide		141.15	137.71	± 0.24	kJ/mol	15.03507 ± 0.00083	15194-58-8*0
Methyleneamidogen		242.07	238.42	± 0.55	kJ/mol	28.03332 ± 0.00082	15845-29-1*0
Cyanogen iodide		222.5	222.0	± 1.7	kJ/mol	152.92191 ± 0.00080	506-78-5*0
Dioxygen anion		-43.36	-42.72	± 0.17	kJ/mol	31.99935 ± 0.00060	11062-77-4*0
Formyl anion		11.60	11.98	± 0.44	kJ/mol	29.01859 ± 0.00086	57340-31-5*0
n-Propylium		857.14	838.86	± 0.76	kJ/mol	43.0871 ± 0.0024	19252-52-9*0
Cyclopropyl		303.88	291.25	± 0.48	kJ/mol	41.0718 ± 0.0024	2417-82-5*0
2-Propynylidyne		718.75	723.10	± 0.71	kJ/mol	37.0400 ± 0.0024	53590-28-6*0
iso-Pentane		-118.93	-152.98	± 0.39	kJ/mol	72.1488 ± 0.0041	78-78-4*0
1-Hydroxyethylidene		57.43	47.05	± 0.77	kJ/mol	44.0526 ± 0.0017	30967-49-8*21
Dicarbon monoxide		377.12	381.16	± 0.83	kJ/mol	40.0208 ± 0.0016	12071-23-7*1
Acetic acid		-418.49	-432.65	± 0.36	kJ/mol	60.0520 ± 0.0017	64-19-7*0
Dimethylamidogen		175.04	157.70	± 0.92	kJ/mol	44.0758 ± 0.0017	15337-44-7*0
2-Iminoethyl		219.35	207.99	± 0.86	kJ/mol	42.0599 ± 0.0016	73843-90-0*2
Isocyanoamidogen		489.7	487.7	± 1.2	kJ/mol	41.03212 ± 0.00082	947408-73-3*1
Chloromethylene		320.35	320.64	± 0.89	kJ/mol	48.4713 ± 0.0012	2108-20-5*2
Dibromomethane		27.03	5.62	± 0.64	kJ/mol	173.8346 ± 0.0022	74-95-3*0
1,1-Difluoroethene		-343.62	-350.68	± 0.63	kJ/mol	64.0341 ± 0.0016	75-38-7*0
Indane		90.86	59.83	± 0.76	kJ/mol	118.1757 ± 0.0072	496-11-7*0
o-Tolualdehyde		-44.2	-66.4	± 1.1	kJ/mol	120.1485 ± 0.0064	529-20-4*0
Hypofluorite		-108.84	-108.67	± 0.48	kJ/mol	34.99835 ± 0.00030	12763-66-5*0
3-Buten-2-one		-95.30	-111.54	± 0.85	kJ/mol	70.0898 ± 0.0032	78-94-4*1
Urea		-218.16	-234.56	± 0.42	kJ/mol	60.05534 ± 0.00091	57-13-6*0
Oxomethaniminium		695.33	688.77	± 0.89	kJ/mol	44.03217 ± 0.00087	59348-22-0*0
Acetamide		-219.62	-237.13	± 0.56	kJ/mol	59.0672 ± 0.0017	60-35-5*0
1-Cyanovinyl		419.0	418.9	± 1.1	kJ/mol	52.0547 ± 0.0024	15091-87-9*0
1,3-Hexadiyne		405.21	393.51	± 0.94	kJ/mol	78.1118 ± 0.0048	4447-21-6*0
(E)-1-Methylallyl		152.66	135.35	± 0.79	kJ/mol	55.0984 ± 0.0032	17787-86-9*0
Sulfuric acid			-892.23	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*839
Iodine monochloride		19.024	17.391	± 0.013	kJ/mol	162.35717 ± 0.00090	7790-99-0*0
Hypoiodite		-102.38	-104.20	± 0.88	kJ/mol	142.90442 ± 0.00030	15065-65-3*0
Nitrogen atom cation		1872.911	1875.692	± 0.022	kJ/mol	14.006191 ± 0.000070	14158-23-7*0
Trinitrogen cation		1519.59	1516.96	± 0.89	kJ/mol	42.01967 ± 0.00021	12185-03-4*0
Oxonitrate anion		88.10	88.14	± 0.25	kJ/mol	30.00669 ± 0.00031	14967-78-3*0
Nitrogen sesquioxide		90.74	86.17	± 0.15	kJ/mol	76.01168 ± 0.00091	10544-73-7*0
Chloronium		881.5	878.4	± 1.1	kJ/mol	37.46803 ± 0.00091	36658-55-6*0
Hexafluoroethane		-1334.08	-1342.38	± 0.80	kJ/mol	138.0118 ± 0.0016	76-16-4*0
Methyliumyl		1393.200	1394.059	± 0.099	kJ/mol	14.02603 ± 0.00081	15091-72-2*0
Methylene anion		328.17	328.60	± 0.18	kJ/mol	14.02713 ± 0.00081	50928-07-9*0
Methylidyne anion		475.76	479.08	± 0.21	kJ/mol	13.01919 ± 0.00080	28604-54-8*0
Ethanium		874.37	858.11	± 0.61	kJ/mol	31.0764 ± 0.0017	24669-33-8*1
Chlorine atom cation		1370.807	1372.603	± 0.0021	kJ/mol	35.45215 ± 0.00090	24203-47-2*0
Methylperoxy anion		-89.69	-99.84	± 0.45	kJ/mol	47.0339 ± 0.0010	35683-44-4*0
Cyclobutane		52.24	27.70	± 0.36	kJ/mol	56.1063 ± 0.0032	287-23-0*0
2-Butynyl		318.15	310.79	± 0.66	kJ/mol	53.0825 ± 0.0032	82252-88-8*0
1,2-Butadienyl		328.95	320.23	± 0.63	kJ/mol	53.0825 ± 0.0032	4777-46-2*0
Isoprene		96.27	75.75	± 0.66	kJ/mol	68.1170 ± 0.0040	78-79-5*0
Chlorine trifluoride		-158.63	-162.73	± 0.86	kJ/mol	92.44791 ± 0.00090	7790-91-2*0
Oxirene		272.43	270.27	± 0.60	kJ/mol	42.0367 ± 0.0016	157-18-6*2
Ethynol		95.30	92.81	± 0.73	kJ/mol	42.0367 ± 0.0016	32038-79-2*2
Dihydroxymethyl		-196.9	-206.3	± 1.1	kJ/mol	47.0333 ± 0.0010	14840-85-8*1
Formyloxidanyl		-125.76	-127.43	± 0.55	kJ/mol	45.0174 ± 0.0010	16499-21-1*1
Methoxyethane		-194.31	-217.20	± 0.52	kJ/mol	60.0950 ± 0.0025	540-67-0*0
Acetate		-495.94	-505.07	± 0.80	kJ/mol	59.0446 ± 0.0017	71-50-1*0
Cyanoamidogen anion		69.72	66.72	± 0.72	kJ/mol	41.03267 ± 0.00082	67131-47-9*2
1,1,1-Trichloroethane		-133.98	-144.56	± 0.52	kJ/mol	133.4033 ± 0.0031	71-55-6*0
Tetrachloroethene		-20.55	-21.42	± 0.99	kJ/mol	165.8322 ± 0.0039	127-18-4*0
Chlorodifluoromethane		-475.58	-481.78	± 0.99	kJ/mol	86.4681 ± 0.0012	75-45-6*0
Fluoromethylene		148.39	148.68	± 0.43	kJ/mol	32.01704 ± 0.00080	13453-52-6*2
Fluoroformyl		-176.62	-176.04	± 0.37	kJ/mol	47.00850 ± 0.00085	1871-24-5*0
2-Bromoethanol		-196.00	-220.06	± 0.52	kJ/mol	124.9645 ± 0.0019	540-51-2*0
Carbon suboxide		-94.42	-92.31	± 0.96	kJ/mol	68.0309 ± 0.0025	504-64-3*0
Ethylbenzene		58.41	29.94	± 0.52	kJ/mol	106.1650 ± 0.0064	100-41-4*0
m-Tolualdehyde		-48.5	-71.3	± 1.2	kJ/mol	120.1485 ± 0.0064	620-23-5*0
3-Oxo-1-propenyl		190.96	184.93	± 0.91	kJ/mol	55.0553 ± 0.0024	206255-29-0*11
2-Propynal		135.51	133.34	± 0.87	kJ/mol	54.0474 ± 0.0024	624-67-9*0
Cyanomethylene		479.6	483.0	± 1.1	kJ/mol	39.0361 ± 0.0016	2612-62-6*1
3-Methylenecyclopropene		396.08	388.15	± 0.81	kJ/mol	52.0746 ± 0.0032	4095-06-1*0
Phenylperoxy		153.9	136.9	± 1.4	kJ/mol	109.1027 ± 0.0049	91422-02-5*0
Fluorosilylidyne		-60.32	-58.48	± 0.62	kJ/mol	47.08390 ± 0.00030	11128-24-8*1
Silylidyne		371.23	373.03	± 0.67	kJ/mol	29.09344 ± 0.00031	13774-94-2*0
Bromosilane		-59.0	-75.5	± 1.4	kJ/mol	111.0133 ± 0.0011	13465-73-1*0
Bromotrimethylsilane		-259.4	-290.1	± 2.0	kJ/mol	153.0931 ± 0.0027	2857-97-8*0
Trimethylsilylium		655.4	634.8	± 1.9	kJ/mol	73.1885 ± 0.0025	28927-31-3*0
1-Methyl-1-propenyl		240.11	223.93	± 0.66	kJ/mol	55.0984 ± 0.0032	71790-71-1*1
1-Butenyl		263.46	246.12	± 0.68	kJ/mol	55.0984 ± 0.0032	2669-61-6*2
Sulfur monoxide		5.95	6.00	± 0.13	kJ/mol	48.0654 ± 0.0060	13827-32-2*0
Oxygen atom		246.844	249.229	± 0.0021	kJ/mol	15.99940 ± 0.00030	17778-80-2*1
Ammonium			-133.076	± 0.056	kJ/mol	18.03795 ± 0.00029	14798-03-9*800
Ethylidyne		640.8	636.3	± 1.1	kJ/mol	27.0452 ± 0.0016	67624-57-1*2
Isocyanomethanide		253.98	250.94	± 0.89	kJ/mol	40.0446 ± 0.0016	81704-80-5*0
Peroxyformate		-340.95	-346.41	± 0.80	kJ/mol	61.0174 ± 0.0012	104960-05-6*1
Hydrogen peroxide cation		897.29	890.31	± 0.51	kJ/mol	34.01413 ± 0.00062	12325-10-9*1
1-Methylethylidene		316.06	302.15	± 0.97	kJ/mol	42.0797 ± 0.0024	40852-89-9*2
Propylidene		349.49	335.80	± 0.92	kJ/mol	42.0797 ± 0.0024	6700-78-3*11
Cycloprop-2-enylium		1080.44	1075.35	± 0.99	kJ/mol	39.0554 ± 0.0024	26810-74-2*0
Cyclobutene		178.08	161.03	± 0.60	kJ/mol	54.0904 ± 0.0032	822-35-5*0
1,3-Butadienyl		372.28	361.79	± 0.87	kJ/mol	53.0825 ± 0.0032	86181-68-2*11
Cyclohexane		-83.23	-122.80	± 0.29	kJ/mol	84.1595 ± 0.0049	110-82-7*0
Protonated oxirane		725.73	709.56	± 0.61	kJ/mol	45.0600 ± 0.0017	38607-31-70
Methoxymethyl		13.45	0.88	± 0.86	kJ/mol	45.0605 ± 0.0017	16520-04-0*0
Methoxymethylene		129.23	118.70	± 0.78	kJ/mol	44.0526 ± 0.0017	19527-10-7*21
Oxirene		387.7	383.5	± 1.3	kJ/mol	42.0367 ± 0.0016	157-18-6*11
Diethyl ether		-222.82	-250.24	± 0.75	kJ/mol	74.1216 ± 0.0033	60-29-7*0
Cyanic acid		-12.32	-15.03	± 0.43	kJ/mol	43.02478 ± 0.00086	420-05-3*0
Fulminic acid		170.72	169.27	± 0.44	kJ/mol	43.02478 ± 0.00086	51060-05-0*0
Isofulminic acid		235.25	233.54	± 0.43	kJ/mol	43.02478 ± 0.00086	506-85-4*0
Nitrosomethylidyne		389.3	390.7	± 1.1	kJ/mol	42.01684 ± 0.00086	82267-15-0*0
Acetyl chloride		-232.52	-241.51	± 0.39	kJ/mol	78.4973 ± 0.0019	75-36-5*0
Dioxoethyl		-63.27	-64.69	± 0.86	kJ/mol	57.0281 ± 0.0017	702699-38-5*0
Trioxidanide		-120.3	-123.4	± 1.6	kJ/mol	49.00669 ± 0.00090	89965-38-8*2
Chlorohydroxymethyl		-54.7	-60.7	± 1.1	kJ/mol	65.4787 ± 0.0012	147139-06-8*1
1,1-Dichloroethene		9.29	3.30	± 0.50	kJ/mol	96.9427 ± 0.0024	75-35-4*0
Dichlorodifluoromethane		-488.89	-493.08	± 0.44	kJ/mol	120.9129 ± 0.0020	75-71-8*0
Fluorodichloromethane		-277.64	-283.09	± 0.90	kJ/mol	102.9224 ± 0.0020	75-43-4*0
Difluoromethylene		-193.90	-193.42	± 0.35	kJ/mol	50.00751 ± 0.00080	2154-59-8*2
Fluoromethylene		210.36	210.70	± 0.65	kJ/mol	32.01704 ± 0.00080	13453-52-6*1
Formyl fluoride		-378.64	-382.23	± 0.31	kJ/mol	48.01644 ± 0.00086	1493-02-3*0
Fulvenallene		368.6	354.3	± 1.1	kJ/mol	90.1225 ± 0.0056	27041-32-3*2
Tropyl		296.84	279.40	± 0.94	kJ/mol	91.1305 ± 0.0056	3551-27-7*0
p-Tolualdehyde		-49.2	-72.2	± 1.2	kJ/mol	120.1485 ± 0.0064	104-87-0*0
o-Toluoyl		110.3	91.9	± 1.4	kJ/mol	119.1406 ± 0.0064	104680-89-9*0
Sulfur dioxide anion		-401.27	-403.53	± 0.73	kJ/mol	64.0653 ± 0.0060	12143-17-8*0
2-Hydroxyprop-1-en-1-yl		101.62	89.39	± 0.86	kJ/mol	57.0712 ± 0.0024	1976041-84-5*11
Propyl nitrite		-95.8	-120.7	± 1.8	kJ/mol	89.0932 ± 0.0025	543-67-9*1
1-Formylethenyl		177.60	172.08	± 0.80	kJ/mol	55.0553 ± 0.0024	191018-90-3*0
2-Cyanovinyl		447.83	445.34	± 0.98	kJ/mol	52.0547 ± 0.0024	189141-20-6*2
1,2,3-Butatrien-1-ylium		1271.9	1270.1	± 1.1	kJ/mol	51.0661 ± 0.0032	81932-79-8*2
1-Buten-3-yn-1-yl		547.36	544.70	± 0.84	kJ/mol	51.0666 ± 0.0032	2810-61-9*1
3-Buten-1-ynyl		628.61	626.42	± 0.99	kJ/mol	51.0666 ± 0.0032	108179-98-2*0
Methylsilane		-9.83	-26.00	± 0.89	kJ/mol	46.14384 ± 0.00095	992-94-9*0
Fluorosilane		-346.20	-355.59	± 0.72	kJ/mol	50.10772 ± 0.00037	13537-33-2*0
Chlorosilane		-126.5	-135.5	± 1.4	kJ/mol	66.56202 ± 0.00097	13465-78-6*0
Tetramethylsilane		-185.8	-216.3	± 1.9	kJ/mol	88.2236 ± 0.0033	75-76-3*0
Hydroxysilyl		-104.1	-112.0	± 1.5	kJ/mol	47.10872 ± 0.00047	113648-09-2*0
Trimethylsilanol		-465.3	-491.6	± 1.9	kJ/mol	90.1964 ± 0.0025	1066-40-6*0
2-Aminoethyl		174.45	157.99	± 0.83	kJ/mol	44.0758 ± 0.0017	4422-53-1*0
2-Propanamine		-56.66	-83.45	± 0.52	kJ/mol	59.1103 ± 0.0025	75-31-0*0
Sulfuric acid		-715.5	-729.7	± 1.1	kJ/mol	98.0795 ± 0.0061	7664-93-9*0
Dioxygen		0.000	0.000	± 0.000	kJ/mol	31.99880 ± 0.00060	7782-44-7*1
Dinitrogen cation		1503.311	1503.312	± 0.000	kJ/mol	28.01293 ± 0.00014	13966-04-6*0
Nitrogen atom		470.583	472.445	± 0.022	kJ/mol	14.006740 ± 0.000070	17778-88-0*1
Carbon dioxide cation		936.089	936.924	± 0.017	kJ/mol	44.00895 ± 0.00100	12181-61-2*0
Xenon cation		1170.354	1170.354	± 0.0062	kJ/mol	131.2895 ± 0.0200	24203-25-6*0
Nitroxyl		79.38	74.12	± 0.19	kJ/mol	62.00494 ± 0.00090	12033-49-7*0
Hydrazino		234.79	224.26	± 0.69	kJ/mol	31.03730 ± 0.00025	13598-46-4*0
Dichloride		-231.91	-230.84	± 0.34	kJ/mol	70.9059 ± 0.0018	12595-89-0*0
Nitryl hydride		-36.74	-43.71	± 0.84	kJ/mol	47.01348 ± 0.00061	90266-90-3*0
Carbon anion		589.605	594.752	± 0.039	kJ/mol	12.01125 ± 0.00080	14337-00-9*0
Oxoniumyl ion		978.492	975.589	± 0.024	kJ/mol	18.01473 ± 0.00033	56583-62-1*0
Hydroperoxonium		738.2	727.9	± 1.2	kJ/mol	35.02207 ± 0.00064	70850-26-9*1
Chloro hypochlorite		79.79	77.98	± 0.36	kJ/mol	86.9048 ± 0.0018	7791-21-1*0
Hydrogen isocyanide cation		1351.52	1351.48	± 0.83	kJ/mol	27.02483 ± 0.00081	74158-11-5*0
Cyanomethanide		113.68	110.85	± 0.53	kJ/mol	40.0446 ± 0.0016	21438-99-3*0
Methyloxonium		589.2	575.0	± 1.1	kJ/mol	33.04925 ± 0.00092	17836-08-7*0
n-Propylide		123.1	105.4	± 1.2	kJ/mol	43.0882 ± 0.0024	59513-13-2*0
Allyl anion		134.00	122.99	± 0.21	kJ/mol	41.0723 ± 0.0024	1724-46-5*0
Propargylenide		434.5	437.0	± 1.1	kJ/mol	38.0485 ± 0.0024	82906-05-6*1
2-Butyn-1-yl anion		253.7	244.9	± 1.1	kJ/mol	53.0830 ± 0.0032	65114-66-1*0
Cycloheptatriene		207.79	184.37	± 0.90	kJ/mol	92.1384 ± 0.0056	544-25-2*0
n-Octane		-161.08	-207.91	± 0.51	kJ/mol	114.2285 ± 0.0065	111-65-9*0
Ethoxy		5.62	-8.82	± 0.43	kJ/mol	45.0605 ± 0.0017	2154-50-9*52
Ethenol		-108.89	-119.60	± 0.50	kJ/mol	44.0526 ± 0.0017	557-75-5*2
Hydroperoxymethyl		73.23	65.93	± 0.97	kJ/mol	47.0333 ± 0.0010	74087-87-9*0
Ketene		-45.34	-48.40	± 0.11	kJ/mol	42.0367 ± 0.0016	463-51-4*2
Oxiranyl		172.80	164.51	± 0.98	kJ/mol	43.0446 ± 0.0016	31586-84-2*0
Ketene		182.0	179.0	± 1.1	kJ/mol	42.0367 ± 0.0016	463-51-4*1
Chlorooxy hypochlorite		134.57	131.34	± 0.56	kJ/mol	102.9042 ± 0.0019	12292-23-8*0
Oxoethylidene		261.1	257.6	± 1.1	kJ/mol	42.0367 ± 0.0016	39920-84-8*12
Dioxirane		9.39	1.72	± 0.53	kJ/mol	46.0254 ± 0.0010	157-26-6*0
Methoxyethene		-89.3	-107.1	± 1.1	kJ/mol	58.0791 ± 0.0025	107-25-5*2
2-Propanol		-248.61	-272.71	± 0.26	kJ/mol	60.0950 ± 0.0025	67-63-0*0
Methyl acetate		-363.3	-382.0	± 1.2	kJ/mol	74.0785 ± 0.0025	79-20-9*2
Carboxymethyl		-226.6	-236.4	± 1.1	kJ/mol	59.0440 ± 0.0017	2887-46-9*1
Chlorine pentafluoride		-226.0	-234.1	± 1.3	kJ/mol	130.44472 ± 0.00090	13637-63-3*0
1-Iminoethyl		233.1	223.0	± 1.1	kJ/mol	42.0599 ± 0.0016	128365-64-0*2
1-Aminoethenyl		294.70	286.07	± 0.92	kJ/mol	42.0599 ± 0.0016	180385-92-6*0
Nitrilomethylimidogen		581.6	578.4	± 1.5	kJ/mol	41.03212 ± 0.00082	324529-58-0*2
Cyanoacetylide		300.4	305.6	± 1.1	kJ/mol	50.0394 ± 0.0024	12373-53-4*0
Chloromethylidyne		430.62	434.38	± 0.67	kJ/mol	47.4634 ± 0.0012	3889-76-7*0
Chloromethanol		-232.3	-242.5	± 1.2	kJ/mol	66.4866 ± 0.0013	15454-33-8*0
Chloromethoxy		-11.9	-18.7	± 1.1	kJ/mol	65.4787 ± 0.0012	114282-89-2*0
Fluorotrichloromethane		-283.25	-286.40	± 0.76	kJ/mol	137.3672 ± 0.0028	75-69-4*0
Peroxyhypochlorous acid		3.97	-1.30	± 0.95	kJ/mol	68.4594 ± 0.0011	67952-07-2*0
Formyl chloride		-179.87	-183.08	± 0.67	kJ/mol	64.4707 ± 0.0012	2565-30-2*0
2-Chloroethanol		-249.79	-266.50	± 0.59	kJ/mol	80.5132 ± 0.0019	107-07-3*0
Butadiynyl		801.86	808.46	± 0.96	kJ/mol	49.0507 ± 0.0032	53561-65-2*0
o-Benzyne		468.19	459.27	± 0.85	kJ/mol	76.0960 ± 0.0048	462-80-6*2
m-Toluoyl		109.3	90.8	± 1.4	kJ/mol	119.1406 ± 0.0064	67958-04-7*0
Iodobenzene		178.59	162.60	± 0.99	kJ/mol	204.0084 ± 0.0048	591-50-4*0
Furan		-21.40	-34.53	± 0.94	kJ/mol	68.0740 ± 0.0032	110-00-9*0
1-Hydroxy-1-methylethyl		-78.24	-96.48	± 0.79	kJ/mol	59.0871 ± 0.0025	5131-95-3*0
Trifluoroethene		-493.5	-498.5	± 1.4	kJ/mol	82.0245 ± 0.0016	359-11-5*0
Isocyanoethene		285.29	278.79	± 0.92	kJ/mol	53.0627 ± 0.0024	14668-82-7*0
1-Isocyanoethylidene		527.9	523.2	± 1.1	kJ/mol	53.0627 ± 0.0024	498544-34-62
2-Cyanovinyl		448.26	445.80	± 0.97	kJ/mol	52.0547 ± 0.0024	189141-20-6*1
3-Methylene-1-cyclopropen-1-yl		628.3	625.7	± 1.1	kJ/mol	51.0666 ± 0.0032	127611-24-9*0
Oxosilylene		-98.37	-97.22	± 0.54	kJ/mol	44.08490 ± 0.00042	10097-28-6*0
Silyloxy anion		-311.8	-321.1	± 1.6	kJ/mol	47.10927 ± 0.00047	43336-62-5*0
Cyclobutyl		246.57	227.66	± 0.72	kJ/mol	55.0984 ± 0.0032	4548-06-5*0
1-Ethynyl-2-propyn-1-yl		577.05	575.43	± 0.99	kJ/mol	63.0773 ± 0.0040	78596-35-7*0
1-Propanamine		-42.22	-69.96	± 0.42	kJ/mol	59.1103 ± 0.0025	107-10-8*0
Sulfurous acid		-511.32	-521.53	± 0.89	kJ/mol	82.0801 ± 0.0061	7782-99-2*2
Sulfo		-366.9	-374.7	± 1.1	kJ/mol	81.0721 ± 0.0061	32750-86-0*0
Fluoronium		774.04	771.10	± 0.91	kJ/mol	21.01373 ± 0.00014	12206-67-6*2
Dioxodiazoxane		93.0	87.9	± 1.3	kJ/mol	76.01168 ± 0.00091	122413-35-8*1
Nitric acid			-206.55	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*800
Isodiazene		307.57	300.49	± 0.60	kJ/mol	30.02936 ± 0.00020	28647-38-3*0
Oxoammoniumyl		1092.47	1089.54	± 0.67	kJ/mol	31.01353 ± 0.00032	63559-87-5*0
Peroxynitrous acid		7.83	0.75	± 0.41	kJ/mol	63.01288 ± 0.00091	14691-52-2*1
Peroxynitric acid		-41.46	-51.77	± 0.32	kJ/mol	79.0123 ± 0.0012	26404-66-0*0
Tetrafluorohydrazine		-13.4	-22.9	± 1.4	kJ/mol	104.00709 ± 0.00014	10036-47-2*1
Carbon cation		1797.834	1803.432	± 0.039	kJ/mol	12.01015 ± 0.00080	14067-05-1*0
Trioxidane		-72.68	-81.17	± 0.78	kJ/mol	50.01408 ± 0.00091	14699-99-1*2
Ethylidyne		508.62	504.92	± 0.80	kJ/mol	27.0452 ± 0.0016	67624-57-1*0
Chloride			-166.990	± 0.023	kJ/mol	35.45325 ± 0.00090	16887-00-6*800
Ethynylium		1687.62	1690.95	± 0.15	kJ/mol	25.0288 ± 0.0016	16456-59-0*0
Methylamidogen anion		145.40	134.57	± 0.64	kJ/mol	30.04975 ± 0.00085	54448-39-4*0
Methylimidogen		323.0	315.3	± 1.0	kJ/mol	29.04126 ± 0.00083	27770-42-9*0
Iminomethylium		953.4	949.3	± 1.4	kJ/mol	28.03277 ± 0.00082	196216-36-1*0
Difluoride		-290.6	-289.8	± 1.3	kJ/mol	37.9973550 ± 0.0000010	12184-85-9*0
Water dimer		-491.034	-499.074	± 0.044	kJ/mol	36.03056 ± 0.00066	25655-83-8*0
Hydrogen carbonate		-719.2	-725.6	± 1.5	kJ/mol	61.0174 ± 0.0012	71-52-3*0
Cyclopropylide		265.3	252.5	± 1.1	kJ/mol	41.0723 ± 0.0024	1724-45-4*0
Propylidyne		492.7	483.0	± 1.2	kJ/mol	41.0718 ± 0.0024	85056-54-8*1
Bromanylium		1257.786	1251.723	± 0.056	kJ/mol	79.90345 ± 0.00100	22541-56-6*0
Cyclopropylidene		475.03	467.01	± 0.84	kJ/mol	40.0639 ± 0.0024	2143-70-6*1
Propargylium		1193.55	1190.74	± 0.31	kJ/mol	39.0554 ± 0.0024	21540-27-2*0
Cycloprop-1-enyl		527.49	523.10	± 0.58	kJ/mol	39.0559 ± 0.0024	19528-44-0*0
Cyclopropenylidene		497.06	496.09	± 0.45	kJ/mol	38.0480 ± 0.0024	16165-40-5*0
Propargylenide		437.0	439.5	± 1.1	kJ/mol	38.0485 ± 0.0024	82906-05-6*2
2-Propyn-1-ylium-1-ylidene		1598.46	1602.84	± 0.90	kJ/mol	37.0395 ± 0.0024	75104-46-0*0
sec-Butyl		91.33	66.56	± 0.71	kJ/mol	57.1143 ± 0.0033	2348-55-2*0
iso-Butyl		97.32	73.33	± 0.78	kJ/mol	57.1143 ± 0.0033	4630-45-9*0
1-Methylene-2-propenyl		327.17	317.17	± 0.74	kJ/mol	53.0825 ± 0.0032	1204515-52-5*0
n-Heptane		-145.42	-187.29	± 0.44	kJ/mol	100.2019 ± 0.0057	142-82-5*0
Oxoethanide		-43.9	-49.5	± 1.3	kJ/mol	43.0452 ± 0.0016	78944-68-0*0
Iodine cation		1115.549	1115.149	± 0.0062	kJ/mol	126.903921 ± 0.000030	22541-93-1*0
2-Hydroperoxyethyl		64.6	50.2	± 1.3	kJ/mol	61.0599 ± 0.0017	126898-97-3*32
Methoxyoxomethyl		-152.7	-160.8	± 1.2	kJ/mol	59.0440 ± 0.0017	16481-04-2*1
Hydroxyformyl		-174.33	-177.36	± 0.48	kJ/mol	45.0174 ± 0.0010	2564-86-5*2
Hydroxyformyl anion		-319.53	-322.12	± 0.56	kJ/mol	45.0180 ± 0.0010	78944-70-4*2
Ethyl formate		-375.0	-393.8	± 1.0	kJ/mol	74.0785 ± 0.0025	109-94-4*1
Propionic acid		-435.82	-453.71	± 0.60	kJ/mol	74.0785 ± 0.0025	79-09-4*1
(Methylimino)methyl		278.0	267.9	± 1.1	kJ/mol	42.0599 ± 0.0016	117928-23-1*1
1-Aziridinyl		314.0	301.8	± 1.4	kJ/mol	42.0599 ± 0.0016	23838-09-7*0
(Dimethylamino)methyl		166.4	143.4	± 1.3	kJ/mol	58.1024 ± 0.0025	30208-47-0*0
Cyanoamidogen		652.4	649.6	± 1.2	kJ/mol	41.03212 ± 0.00082	12347-01-2*21
Diazomethyl		652.7	649.7	± 1.3	kJ/mol	41.03212 ± 0.00082	20813-32-5*22
Diazomethanide		305.17	302.08	± 0.76	kJ/mol	41.03267 ± 0.00082	100840-43-5*2
Isocyanoamidogen		828.2	825.4	± 1.3	kJ/mol	41.03212 ± 0.00082	947408-73-3*22
Ethylamidogen anion		106.51	88.86	± 0.80	kJ/mol	44.0763 ± 0.0017	54448-40-7*0
Chloromethide		56.3	53.0	± 2.0	kJ/mol	49.4798 ± 0.0012	60291-29-4*0
Hexachloroethane		-144.2	-146.6	± 1.3	kJ/mol	236.7376 ± 0.0056	67-72-1*0
cis-1,2-Dichloroethene	$C(\Cl)=C\Cl$	3.81	-2.19	± 0.55	kJ/mol	96.9427 ± 0.0024	156-59-2*0
Dichloroacetylene		232.79	236.10	± 0.72	kJ/mol	94.9268 ± 0.0024	7572-29-4*0
Tetraiodomethane		323.5	318.4	± 1.1	kJ/mol	519.62858 ± 0.00081	507-25-5*0
Difluoromethylene		-193.90	-193.42	± 0.35	kJ/mol	50.00751 ± 0.00080	2154-59-8*0
1,1-Difluoroethane		-489.02	-502.74	± 0.53	kJ/mol	66.0500 ± 0.0016	75-37-6*0
2-Fluoroethanol		-405.64	-422.88	± 0.99	kJ/mol	64.0589 ± 0.0017	371-62-0*0
1,3,5-Hexatriyne		682.1	686.9	± 1.2	kJ/mol	74.0801 ± 0.0048	3161-99-7*0
2-Hydrotrioxy		299.4	293.7	± 1.2	kJ/mol	49.00614 ± 0.00090	12500-78-60
Benzylide		141.98	123.06	± 0.39	kJ/mol	91.1310 ± 0.0056	18860-15-6*0
Benzylidene		489.6	474.4	± 1.1	kJ/mol	90.1225 ± 0.0056	3101-08-4*2
Norbornadiene		265.0	239.5	± 1.5	kJ/mol	92.1384 ± 0.0056	121-46-0*0
Benzonitrile		229.99	215.79	± 0.92	kJ/mol	103.1213 ± 0.0056	100-47-0*0
p-Toluoyl		108.4	89.8	± 1.4	kJ/mol	119.1406 ± 0.0064	67958-03-6*0
Acetonate		-187.54	-201.09	± 0.92	kJ/mol	57.0717 ± 0.0024	24262-31-5*0
Methyl nitrite		-55.42	-66.10	± 0.43	kJ/mol	61.0401 ± 0.0010	624-91-9*0
Acryloyl		102.79	97.19	± 0.98	kJ/mol	55.0553 ± 0.0024	72241-20-4*2
3-Oxo-1,2-propadien-1-yl		290.34	292.85	± 0.95	kJ/mol	53.0394 ± 0.0024	1198096-74-0*0
1-Cyanoethylidene		475.7	470.6	± 1.1	kJ/mol	53.0627 ± 0.0024	498544-34-6*2
3-Imino-2-propen-1-ylidene		530.7	525.9	± 1.2	kJ/mol	53.0627 ± 0.0024	916765-05-4*11
2-(Methylidyneamino)ethenyl		600.7	595.6	± 1.2	kJ/mol	53.0627 ± 0.0024	123416-74-0*11
1-Cyanovinyl anion		224.3	221.5	± 1.2	kJ/mol	52.0553 ± 0.0024	36259-97-9*0
1,2,3-Butatrien-1-yl anion		388.5	386.6	± 1.1	kJ/mol	51.0672 ± 0.0032	102275-54-7*0
Difluorosilylene		-629.1	-630.0	± 1.3	kJ/mol	66.08231 ± 0.00030	13966-66-0*2
Chloric acid		0.6	-6.5	± 1.1	kJ/mol	84.4588 ± 0.0013	7790-93-4*0
Silylene		361.95	360.34	± 0.99	kJ/mol	30.10138 ± 0.00033	13825-90-6*1
Di-mu-hydrodihydrodisilicon		374.8	364.4	± 2.3	kJ/mol	60.20276 ± 0.00066	129970-82-7*12
Trimethylsiloxy		-188.1	-211.1	± 1.9	kJ/mol	89.1885 ± 0.0025	54572-10-0*0
1,5-Hexadiyne		431.6	421.1	± 1.2	kJ/mol	78.1118 ± 0.0048	628-16-0*0
Perchloryl		191.77	186.10	± 0.62	kJ/mol	83.4509 ± 0.0013	13932-10-0*0
2-Methylallyl		155.94	138.82	± 0.77	kJ/mol	55.0984 ± 0.0032	15157-95-6*0
3-Butenyl		223.24	206.73	± 0.90	kJ/mol	55.0984 ± 0.0032	2154-62-3*0
2-Methyl-1-propenyl		251.24	234.22	± 0.72	kJ/mol	55.0984 ± 0.0032	33825-33-1*0
N-Methylethanamine		-17.5	-45.6	± 1.1	kJ/mol	59.1103 ± 0.0025	624-78-2*0
Phenanthrene		231.97	203.16	± 0.75	kJ/mol	178.2292 ± 0.0112	85-01-8*0
Disulfene oxide		-50.62	-52.63	± 0.43	kJ/mol	80.1314 ± 0.0120	20901-21-7*0
Chlorate		-208.2	-213.7	± 1.4	kJ/mol	83.4514 ± 0.0013	14866-68-3*0
Sulfur hydroxide oxide		-474.5	-483.9	± 1.6	kJ/mol	97.0715 ± 0.0061	12337-07-4*1
Ethanethiol		-28.76	-45.58	± 0.38	kJ/mol	62.1350 ± 0.0062	75-08-1*0
Dinitrogen tetraoxide		20.17	10.88	± 0.14	kJ/mol	92.0111 ± 0.0012	10544-72-6*0
Azanylium		944.273	937.319	± 0.029	kJ/mol	17.03001 ± 0.00022	19496-55-0*0
Hydrogen fluoride			-324.55	± 0.13	kJ/mol	20.006343 ± 0.000070	7664-39-3*955
Difluoroamidogen		36.24	33.66	± 0.63	kJ/mol	52.003546 ± 0.000070	3744-07-8*0
Fluoroimidogen		232.64	232.63	± 0.80	kJ/mol	33.005143 ± 0.000070	13967-06-1*1
Oxygen atom		436.665	438.523	± 0.0021	kJ/mol	15.99940 ± 0.00030	17778-80-2*2
Methyliumylidene		1619.738	1623.082	± 0.039	kJ/mol	13.01809 ± 0.00080	24361-82-8*0
Ethylidyne		508.62	504.92	± 0.80	kJ/mol	27.0452 ± 0.0016	67624-57-1*1
Vinylidene anion		364.25	364.06	± 0.31	kJ/mol	26.0378 ± 0.0016	66295-36-1*0
Tetroxidane		-33.33	-44.00	± 0.44	kJ/mol	66.0135 ± 0.0012	29683-94-1*21
Bromochlorane		21.891	14.447	± 0.059	kJ/mol	115.3567 ± 0.0013	13863-41-7*0
Methanol cation		856.94	846.62	± 0.32	kJ/mol	32.04131 ± 0.00090	12538-91-9*0
Hydroxymethylene		219.3	216.4	± 1.1	kJ/mol	30.02598 ± 0.00087	19710-56-6*3
Aquacarbon		442.7	441.1	± 1.3	kJ/mol	30.02598 ± 0.00087	81434-73-3*1
Carbonic acid		-596.47	-606.59	± 0.74	kJ/mol	62.0248 ± 0.0012	463-79-6*2
Carbonic acid		-561.29	-570.14	± 0.91	kJ/mol	62.0248 ± 0.0012	463-79-6*3
Hydroperoxycarbonyl		-73.25	-77.11	± 0.97	kJ/mol	61.0168 ± 0.0012	153751-35-0*0
1,3-Dioxolan-2-one		-492.62	-510.27	± 0.85	kJ/mol	88.0621 ± 0.0026	96-49-1*0
Pyruvic acid		-520.57	-534.91	± 0.97	kJ/mol	88.0621 ± 0.0026	127-17-3*0
Dimethyl carbonate		-550.04	-570.59	± 0.37	kJ/mol	90.0779 ± 0.0026	616-38-6*1
Allylium		964.45	952.89	± 0.33	kJ/mol	41.0713 ± 0.0024	1724-44-3*0
Iodine monobromide		49.727	40.780	± 0.066	kJ/mol	206.8085 ± 0.0010	7789-33-5*0
Propylidyne		624.8	613.3	± 1.3	kJ/mol	41.0718 ± 0.0024	85056-54-8*2
1-Propynyl		528.54	526.37	± 0.65	kJ/mol	39.0559 ± 0.0024	89342-91-6*0
1-Propynylide		264.60	261.02	± 0.66	kJ/mol	39.0565 ± 0.0024	36147-87-2*0
1-Propen-1-yl-3-ylidene		656.7	653.3	± 1.1	kJ/mol	39.0559 ± 0.0024	84654-90-0*11
t-Butyl anion		76.9	52.1	± 1.3	kJ/mol	57.1148 ± 0.0033	65114-21-8*0
Oxidanylium		1293.362	1293.391	± 0.026	kJ/mol	17.00679 ± 0.00031	12259-29-9*0
5-Ethenyl-1,3-cyclopentadiene		237.1	215.3	± 1.4	kJ/mol	92.1384 ± 0.0056	29647-85-6*1
2-Hydroxyethenyl		137.98	131.24	± 0.72	kJ/mol	43.0446 ± 0.0016	108665-16-3*21
Oxiranylidene		213.5	209.2	± 1.4	kJ/mol	42.0367 ± 0.0016	50983-85-2*2
Iodine		107.157	106.757	± 0.0021	kJ/mol	126.904470 ± 0.000030	14362-44-8*1
1-Hydroperoxyethylium		690.5	674.8	± 1.5	kJ/mol	61.0594 ± 0.0017	126898-98-421
Hydroxyformyl anion		-313.64	-315.44	± 0.56	kJ/mol	45.0180 ± 0.0010	78944-70-4*1
Ethoxyethene		-117.8	-141.6	± 1.5	kJ/mol	72.1057 ± 0.0033	109-92-2*2
1,1-Ethenediol		-307.56	-320.51	± 0.83	kJ/mol	60.0520 ± 0.0017	10375-04-9*1
1,2-Ethenediol		-272.69	-285.02	± 0.90	kJ/mol	60.0520 ± 0.0017	1571-60-4*1
(Formyloxy)methyl		-151.3	-159.4	± 1.1	kJ/mol	59.0440 ± 0.0017	3122-12-1*1
Ethylene glycol		-369.65	-389.28	± 0.40	kJ/mol	62.0678 ± 0.0018	107-21-1*0
Oxalic acid		-721.0	-731.6	± 1.2	kJ/mol	90.0349 ± 0.0020	144-62-7*0
(Methylamino)methyl cation		729.59	710.98	± 0.98	kJ/mol	44.0752 ± 0.0017	31277-24-40
(Methyleneamino)methyl anion		187.0	176.6	± 1.6	kJ/mol	42.0604 ± 0.0016	73859-26-4*0
2-Aminoethenyl		319.8	309.6	± 1.3	kJ/mol	42.0599 ± 0.0016	176964-54-8*2
Trioxidanyl		25.36	23.37	± 0.13	kJ/mol	49.00614 ± 0.00090	12500-78-6*1
Bromotrichloromethane		-29.83	-38.98	± 0.53	kJ/mol	198.2728 ± 0.0030	75-62-7*0
Dichloromethyl		92.89	90.98	± 0.88	kJ/mol	83.9240 ± 0.0020	3474-12-2*0
Chloromethyl		118.46	115.39	± 0.87	kJ/mol	49.4793 ± 0.0012	6806-86-6*0
Methyl hypochlorite		-53.0	-62.9	± 1.4	kJ/mol	66.4866 ± 0.0013	593-78-2*0
1,2-Dichloroethane		-118.51	-130.46	± 0.53	kJ/mol	98.9586 ± 0.0024	107-06-2*0
Chlorofluoromethane		-256.45	-263.64	± 0.85	kJ/mol	68.4777 ± 0.0012	593-70-4*0
Difluoromethyliumyl		908.34	908.77	± 0.77	kJ/mol	50.00696 ± 0.00080	54250-40-7*0
Fluoromethyliumylidene		1123.47	1126.69	± 0.37	kJ/mol	31.00855 ± 0.00080	33412-11-2*0
1,2-Difluoroacetylene		2.82	5.65	± 0.63	kJ/mol	62.0182 ± 0.0016	689-99-6*0
Chloroformyl		-21.92	-20.52	± 0.49	kJ/mol	63.4628 ± 0.0012	2602-42-8*0
o-Benzyne anion		413.81	404.70	± 0.95	kJ/mol	76.0965 ± 0.0048	100569-88-8*0
Cycloheptene		28.55	-8.68	± 0.74	kJ/mol	96.1702 ± 0.0057	628-92-2*0
Anisole		-45.99	-70.83	± 0.63	kJ/mol	108.1378 ± 0.0056	100-66-3*0
Benzoylium		764.1	750.0	± 1.3	kJ/mol	105.1135 ± 0.0056	19270-10-1*0
Benzoyl fluoride		-287.9	-304.3	± 1.3	kJ/mol	124.1124 ± 0.0056	455-32-3*0
Fluorobenzene cation		791.92	776.90	± 0.39	kJ/mol	96.1018 ± 0.0048	34468-25-2*0
Nitrosobenzene		216.9	199.9	± 1.2	kJ/mol	107.1100 ± 0.0048	586-96-9*0
1-Methylethoxy		-25.06	-43.83	± 0.74	kJ/mol	59.0871 ± 0.0025	3958-66-5*0
Nitromethyl		139.6	130.2	± 1.1	kJ/mol	60.0321 ± 0.0010	16787-85-2*0
2-Butanone		-216.85	-238.30	± 0.79	kJ/mol	72.1057 ± 0.0033	78-93-3*0
Acryloyl		101.1	95.2	± 1.4	kJ/mol	55.0553 ± 0.0024	72241-20-4*11
Formaldoxime		30.6	20.0	± 1.3	kJ/mol	45.04066 ± 0.00088	75-17-2*1
Dioxaziridinyl		355.1	352.6	± 1.4	kJ/mol	46.00554 ± 0.00060	66252-29-7*0
Trioxygen difluoride		112.5	106.7	± 1.1	kJ/mol	85.99501 ± 0.00090	16829-28-0*1
1,3-Cyclobutadien-1-yl		653.9	649.4	± 1.1	kJ/mol	51.0666 ± 0.0032	127611-22-7*0
5-Methyl-1,3-cyclopentadiene		134.1	111.1	± 1.4	kJ/mol	80.1277 ± 0.0048	96-38-8*0
Trifluorosilyl		-993.0	-996.0	± 1.3	kJ/mol	85.08071 ± 0.00030	14835-14-4*0
Silylsilylene		317.3	309.5	± 1.9	kJ/mol	60.20276 ± 0.00066	50420-90-1*2
Hypochloroperoxoous acid, hydroxy ester		48.4	41.5	± 1.8	kJ/mol	84.4588 ± 0.0013	928652-99-7*1
Fluorotrimethylsilane		-547.2	-570.8	± 2.0	kJ/mol	92.1875 ± 0.0025	420-56-4*0
Chlorotrimethylsilane		-326.3	-349.5	± 2.3	kJ/mol	108.6418 ± 0.0027	75-77-4*0
Trimethylsiloxide		-486.6	-510.4	± 2.1	kJ/mol	89.1890 ± 0.0025	41866-81-3*0
1,4-Hexadiyne		424.7	414.8	± 1.2	kJ/mol	78.1118 ± 0.0048	10420-91-4*0
Biallenyl		410.6	399.0	± 1.5	kJ/mol	78.1118 ± 0.0048	29776-96-3*1
1,2,3,4-Hexatetraene		429.8	420.1	± 1.5	kJ/mol	78.1118 ± 0.0048	177856-38-1*0
Pentatetraene		452.58	448.58	± 0.93	kJ/mol	64.0853 ± 0.0040	21986-03-8*0
1-Aminoethyl		133.33	116.55	± 0.94	kJ/mol	44.0758 ± 0.0017	30208-36-7*0
Ethylamidogen		166.71	150.59	± 0.95	kJ/mol	44.0758 ± 0.0017	41084-92-8*0
2-Naphthyl anion		288.8	269.4	± 1.2	kJ/mol	127.1631 ± 0.0080	88760-89-8*0
1-Naphthyl anion		283.6	264.2	± 1.2	kJ/mol	127.1631 ± 0.0080	125254-29-7*0
Nitrosamine		85.83	76.95	± 0.95	kJ/mol	46.02876 ± 0.00036	35576-91-1*0
Sulfur trioxide anion		-603.0	-608.6	± 2.3	kJ/mol	80.0647 ± 0.0061	12210-38-7*0
Diazenyl		252.16	249.24	± 0.45	kJ/mol	29.02142 ± 0.00016	36882-13-0*0
Nitrosyl chloride		54.461	52.559	± 0.067	kJ/mol	65.45884 ± 0.00095	2696-92-6*0
Carbide		504.37	510.95	± 0.31	kJ/mol	24.0219 ± 0.0016	12595-78-7*0
Carbon dioxide		49.8	50.6	± 1.1	kJ/mol	44.00950 ± 0.00100	124-38-9*1
Bicyclo[1.1.0]buta-1,3-diene-2,4-diyl		1047.09	1054.69	± 0.67	kJ/mol	48.0428 ± 0.0032	12184-80-4*0
Methane cation		1150.683	1144.300	± 0.057	kJ/mol	16.04191 ± 0.00085	20741-88-2*0
Bromonium		924.4	913.6	± 3.0	kJ/mol	81.9193 ± 0.0010	36658-54-5*0
Ethanium		874.37	858.13	± 0.61	kJ/mol	31.0764 ± 0.0017	24669-33-8*0
Acetylene cation		1328.88	1328.21	± 0.12	kJ/mol	26.0367 ± 0.0016	25641-79-6*0
1-Ethylium-1-ylidene		1329.7	1328.3	± 1.2	kJ/mol	27.0447 ± 0.0016	78949-84-5*0
Ethylidyne anion		457.1	453.1	± 1.2	kJ/mol	27.0458 ± 0.0016	117768-70-4*0
Hydrogen difluoride		-198.5	-198.4	± 1.2	kJ/mol	39.004746 ± 0.000070	12528-21-1*1
Isocyanomethyl		363.3	360.8	± 1.1	kJ/mol	40.0440 ± 0.0016	70971-59-4*0
Methyloxoniumylidene		1062.75	1054.93	± 0.57	kJ/mol	31.03337 ± 0.00088	58157-09-8*0
Hydroxymethanide		10.0	3.4	± 1.5	kJ/mol	31.03447 ± 0.00088	55830-71-2*0
Formaldehyde		-105.381	-109.222	± 0.094	kJ/mol	30.02598 ± 0.00087	50-00-0*2
Hydroxymethylene		131.12	127.37	± 0.29	kJ/mol	30.02598 ± 0.00087	19710-56-6*2
Hydroxymethylene cation		971.9	968.2	± 1.4	kJ/mol	30.02543 ± 0.00087	135395-06-1*1
Chlorine difluoride		-47.0	-48.2	± 1.3	kJ/mol	73.44951 ± 0.00090	24801-48-7*0
Isoformyl		217.25	217.63	± 0.69	kJ/mol	29.01804 ± 0.00086	71080-92-7*0
Hydroxyoxomethoxy		-360.36	-366.43	± 0.93	kJ/mol	61.0168 ± 0.0012	38330-85-7*0
3-Dioxiranone		-159.9	-162.7	± 1.5	kJ/mol	60.0089 ± 0.0012	94660-13-6*0
Carbonylbis(oxy) anion		-550.4	-552.4	± 1.4	kJ/mol	60.0094 ± 0.0012	16518-46-0*0
Methyl hydrocarbonate		-577.03	-592.59	± 0.87	kJ/mol	76.0514 ± 0.0019	7456-87-3*1
1,2,3-Trioxolane		-5.7	-23.4	± 1.5	kJ/mol	76.0514 ± 0.0019	6669-36-9*0
1-Methylethylidene		326.9	313.7	± 1.2	kJ/mol	42.0797 ± 0.0024	40852-89-9*1
1-Propenyl		280.25	269.42	± 0.76	kJ/mol	41.0718 ± 0.0024	6067-68-1*1
Dinitrogen pentoxide		24.32	14.74	± 0.29	kJ/mol	108.0105 ± 0.0015	10102-03-1*0
Bromo hypobromite		121.1	104.6	± 1.2	kJ/mol	175.8074 ± 0.0020	21308-80-5*0
Cyclopropynyl		711.24	715.37	± 0.71	kJ/mol	37.0400 ± 0.0024	119178-99-3*0
n-Butyl anion		106.2	81.3	± 1.3	kJ/mol	57.1148 ± 0.0033	79431-01-9*0
sec-Butyl anion		103.4	78.9	± 1.3	kJ/mol	57.1148 ± 0.0033	79431-00-8*0
1,2-Butadienyl anion		255.7	246.2	± 1.1	kJ/mol	53.0830 ± 0.0032	65114-67-2*0
Neopentyl		70.0	40.3	± 1.3	kJ/mol	71.1408 ± 0.0041	3744-21-6*0
Trioxidanylium		1070.7	1064.4	± 1.4	kJ/mol	49.00559 ± 0.00090	74241-49-9*1
n-Hexane		-179.85	-198.51	± 0.32	kJ/mol	86.1754 ± 0.0049	110-54-3*500
n-Nonane		-176.30	-228.09	± 0.48	kJ/mol	128.2551 ± 0.0073	111-84-2*0
1-Hydroxyethylium		610.9	596.5	± 1.1	kJ/mol	45.0600 ± 0.0017	18682-96-7*2
2-Hydroxyethyl		-10.86	-23.49	± 0.93	kJ/mol	45.0605 ± 0.0017	4422-54-2*2
Ethoxy		1.35	-12.07	± 0.42	kJ/mol	45.0605 ± 0.0017	2154-50-9*0
Bromide			-120.50	± 0.12	kJ/mol	79.90455 ± 0.00100	24959-67-9*800
Vinyl alcohol cation		778.6	767.3	± 1.3	kJ/mol	44.0520 ± 0.0017	57239-63-1*2
1-Hydroxyethylidene		70.06	59.54	± 0.86	kJ/mol	44.0526 ± 0.0017	30967-49-8*22
1-Hydroxyethenyl		121.32	114.94	± 0.83	kJ/mol	43.0446 ± 0.0016	81847-74-7*0
Oxiranylium		901.3	893.3	± 1.4	kJ/mol	43.0441 ± 0.0016	57789-76-1*2
C=O=C		653.0	657.3	± 1.5	kJ/mol	40.0208 ± 0.0016	12071-23-71
C=O=C		721.9	726.2	± 1.6	kJ/mol	40.0208 ± 0.0016	12071-23-72
Oxoethylidene		275.4	272.6	± 1.7	kJ/mol	42.0367 ± 0.0016	39920-84-8*2
Dihydroxymethanide		-194.2	-203.2	± 1.8	kJ/mol	47.0339 ± 0.0010	61192-32-3*2
1-Hydroperoxyethyl		39.5	25.9	± 1.3	kJ/mol	61.0599 ± 0.0017	126898-98-4*0
Formic acid cation		721.95	714.86	± 0.25	kJ/mol	46.0248 ± 0.0010	50614-05-6*1
Formyloxidanyl		-121.96	-125.30	± 0.55	kJ/mol	45.0174 ± 0.0010	16499-21-1*2
Bifluoride		-481.8	-480.6	± 1.9	kJ/mol	39.005295 ± 0.000070	18130-74-02
1-Methoxyethenol		-284.3	-303.6	± 1.2	kJ/mol	74.0785 ± 0.0025	4453-91-2*1
1-Propene-1,2-diol		-311.4	-329.8	± 1.2	kJ/mol	74.0785 ± 0.0025	7333-03-1*1
1-Propene-1,2-diol		-293.1	-309.7	± 1.3	kJ/mol	74.0785 ± 0.0025	7333-03-1*2
(Formyloxy)methyl		-135.7	-143.9	± 1.3	kJ/mol	59.0440 ± 0.0017	3122-12-1*2
Carboxymethyl		-206.0	-215.3	± 1.2	kJ/mol	59.0440 ± 0.0017	2887-46-9*2
Dimethylamide		123.1	104.7	± 1.4	kJ/mol	44.0763 ± 0.0017	34285-60-4*0
Ethylideneamidogen		209.7	199.3	± 1.1	kJ/mol	42.0599 ± 0.0016	28445-33-2*0
(Methyleneamino)methyl		244.2	233.6	± 1.3	kJ/mol	42.0599 ± 0.0016	56391-78-7*0
2-Aminoethenyl		325.6	315.4	± 1.3	kJ/mol	42.0599 ± 0.0016	176964-54-8*1
2-Aziridinyl		360.9	348.8	± 1.7	kJ/mol	42.0599 ± 0.0016	23838-09-71
Water anion		31.3	29.8	± 3.1	kJ/mol	18.01583 ± 0.00033	12259-30-2*100
Diazirenide		454.9	452.2	± 1.5	kJ/mol	41.03267 ± 0.00082	130614-84-5*2
1H-Diazirin-3-yl		618.7	615.8	± 1.6	kJ/mol	41.03212 ± 0.00082	324529-57-9*1
1H-Diazirene		405.1	398.0	± 1.4	kJ/mol	42.04006 ± 0.00082	157-23-3*0
Azide		193.63	190.13	± 0.91	kJ/mol	42.02077 ± 0.00021	14343-69-2*0
1,1,2-Trichloroethane		-135.6	-147.3	± 1.1	kJ/mol	133.4033 ± 0.0031	79-00-5*0
1,1,1,2-Tetrachloroethane		-144.4	-152.9	± 1.3	kJ/mol	167.8481 ± 0.0039	630-20-6*0
Pentachloroethyl		28.9	27.0	± 1.3	kJ/mol	201.2849 ± 0.0048	7094-17-9*0
Iodomethane			-12.21	± 0.19	kJ/mol	141.93899 ± 0.00083	74-88-4*590
Difluoromethylene		43.29	44.01	± 0.35	kJ/mol	50.00751 ± 0.00080	2154-59-8*1
Ethyl iodide		-9.41	-39.28	± 0.48	kJ/mol	155.9656 ± 0.0016	75-03-6*500
cis-1,2-Difluoroethene	$F/C=C\F$	-302.99	-309.75	± 0.83	kJ/mol	64.0341 ± 0.0016	1630-77-9*0
Fluoroethynyl		445.3	449.8	± 1.6	kJ/mol	43.0198 ± 0.0016	22533-50-2*0
Fluoro(fluorooxy)methylene		-134.8	-136.0	± 1.3	kJ/mol	66.00691 ± 0.00085	479587-30-9*2
Dibromophosgene		-97.92	-113.86	± 0.37	kJ/mol	187.8181 ± 0.0022	593-95-3*0
1H-Triazirin-1-yl		586.0	584.2	± 2.0	kJ/mol	42.02022 ± 0.00021	912535-95-6*0
1,3,5-Hexatriynyl		1003.1	1010.5	± 2.3	kJ/mol	73.0721 ± 0.0048	88053-50-3*0
Benzene		50.77	49.23	± 0.21	kJ/mol	78.1118 ± 0.0048	71-43-2*500
o-Benzyne		468.19	459.27	± 0.85	kJ/mol	76.0960 ± 0.0048	462-80-6*0
m-Benzyne		527.4	518.9	± 1.2	kJ/mol	76.0960 ± 0.0048	1828-89-3*2
p-Benzyne		587.0	577.5	± 1.2	kJ/mol	76.0960 ± 0.0048	3355-34-8*2
Cycloheptane		-72.42	-117.92	± 0.52	kJ/mol	98.1861 ± 0.0057	291-64-5*0
Dioxidenium		1110.87	1107.98	± 0.11	kJ/mol	33.00619 ± 0.00060	12207-52-2*0
1-Oxopropyl		-17.35	-29.84	± 0.93	kJ/mol	57.0712 ± 0.0024	15843-24-0*2
Propyn-1-ol		65.6	57.4	± 1.1	kJ/mol	56.0633 ± 0.0024	6175-54-8*0
Formylethynyl		468.5	470.4	± 1.3	kJ/mol	53.0394 ± 0.0024	277743-00-7*0
2-Cyclopropen-1-one		164.0	160.0	± 1.1	kJ/mol	54.0474 ± 0.0024	2961-80-0*0
Hydrogen bromide			-120.50	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*800
Cyanovinylidene		581.8	584.3	± 1.2	kJ/mol	51.0468 ± 0.0024	70277-81-5*0
Isocyanovinylidene		697.1	700.4	± 1.4	kJ/mol	51.0468 ± 0.0024	737788-76-0*0
Isocyanoethene		285.29	278.79	± 0.92	kJ/mol	53.0627 ± 0.0024	14668-82-7*1
1-Cyanoethylidene		437.6	433.8	± 1.4	kJ/mol	53.0627 ± 0.0024	498544-34-6*1
Isocyanomethylene		583.1	584.4	± 1.6	kJ/mol	39.0361 ± 0.0016	78694-65-2*1
Chloryl hydride		197.7	191.2	± 1.6	kJ/mol	68.4594 ± 0.0011	174365-32-3*0
2-Methyl-2-cyclopropen-1-ylidene		448.1	441.9	± 1.2	kJ/mol	52.0746 ± 0.0032	185841-59-2*2
1,2,3-Butatrien-1-ylium		1425.9	1426.2	± 1.3	kJ/mol	51.0661 ± 0.0032	81932-79-8*1
But-1-en-3-yn-1-ide		419.8	418.7	± 1.2	kJ/mol	51.0672 ± 0.0032	119611-65-3*2
But-3-en-1-yn-1-ide		326.8	323.7	± 1.3	kJ/mol	51.0672 ± 0.0032	58870-47-6*2
Cyclobutenyl		337.3	324.8	± 1.2	kJ/mol	53.0825 ± 0.0032	24669-29-2*0
Propargyl chloride		186.7	180.8	± 1.3	kJ/mol	74.5086 ± 0.0026	624-65-7*0
Dioxosilane		-277.9	-279.3	± 2.0	kJ/mol	60.08430 ± 0.00067	7631-86-9*0
Hydrogen fluoride			-334.67	± 0.15	kJ/mol	20.006343 ± 0.000070	7664-39-3*800
Iodide			-56.825	± 0.090	kJ/mol	126.905019 ± 0.000030	20461-54-5*800
Dimethylsilane		-66.8	-88.2	± 1.1	kJ/mol	60.1704 ± 0.0017	1111-74-6*0
Trimethylsilyl		47.5	25.4	± 1.9	kJ/mol	73.1891 ± 0.0025	16571-41-8*0
Benzvalene		404.4	386.7	± 1.2	kJ/mol	78.1118 ± 0.0048	659-85-8*0
1-Ethynyl-2-propyn-1-ylidene		727.0	734.1	± 1.7	kJ/mol	62.0694 ± 0.0040	882068-94-2*1
1,2-Pentadien-4-yne		442.28	436.65	± 0.97	kJ/mol	64.0853 ± 0.0040	33555-85-0*0
2,4-Pentadiynyl		568.80	568.04	± 0.98	kJ/mol	63.0773 ± 0.0040	115236-82-3*0
2-Naphthalenyl		416.9	397.3	± 1.3	kJ/mol	127.1626 ± 0.0080	10237-50-0*0
1-Naphthalenyl		418.2	398.6	± 1.3	kJ/mol	127.1626 ± 0.0080	2510-51-2*0
Aniline		108.82	86.81	± 0.72	kJ/mol	93.1265 ± 0.0048	62-53-3*0
Thiodioxy		199.2	197.1	± 1.3	kJ/mol	64.0648 ± 0.0060	164034-62-2*0
Sulfenic acid		-108.0	-114.2	± 1.1	kJ/mol	50.0813 ± 0.0060	62607-44-7*0
3,3-Dioxidedioxathiirane		-257.1	-265.2	± 1.4	kJ/mol	96.0636 ± 0.0061	1177730-84-5*2
Sulfate		-599.7	-608.4	± 1.8	kJ/mol	96.0647 ± 0.0061	14808-79-8*0
Peroxynitrous acid		-0.12	-7.17	± 0.53	kJ/mol	63.01288 ± 0.00091	14691-52-2*2
Difluoroaminylium		1157.81	1154.93	± 0.71	kJ/mol	52.002998 ± 0.000070	31685-31-1*2
(Z)-Difluorodiazene		78.5	72.9	± 2.1	kJ/mol	66.01029 ± 0.00014	13812-43-6*2
(E)-Difluorodiazene		84.2	78.9	± 2.3	kJ/mol	66.01029 ± 0.00014	13776-62-0*1
Dioxiranylidene		190.3	191.1	± 1.4	kJ/mol	44.00950 ± 0.00100	138832-57-2*0
Oxygen cation monohydrate		1153.4	1147.9	± 3.3	kJ/mol	34.01413 ± 0.00062	31748-17-10
Dihydrogen fluoride anion		133.2	131.9	± 1.6	kJ/mol	21.01483 ± 0.00014	117339-92-1*1
Oxywater		64.9	58.4	± 1.3	kJ/mol	34.01468 ± 0.00062	171363-09-0*0
Perchloric acid		11.7	0.2	± 1.3	kJ/mol	100.4582 ± 0.0015	7601-90-3*0
Methylammonium		628.37	609.46	± 0.97	kJ/mol	32.06453 ± 0.00091	17000-00-9*0
Nitrosodioxaziridine		413.7	407.6	± 1.8	kJ/mol	76.01168 ± 0.00091	132871-99-9*1
Aminomethylene		245.9	238.1	± 1.5	kJ/mol	29.04126 ± 0.00083	35430-17-2*0
Fluorohydrochlorine cation		975.3	972.3	± 2.0	kJ/mol	55.45849 ± 0.00090	70110-64-4*0
Methyleneamidogen anion		192.84	189.08	± 0.88	kJ/mol	28.03387 ± 0.00082	28892-56-0*0
(Z)-Iminomethyl		294.52	291.03	± 0.89	kJ/mol	28.03332 ± 0.00082	54980-11-9*0
Aminomethylidyne		371.9	368.4	± 1.1	kJ/mol	28.03332 ± 0.00082	84654-89-7*0
Ethynylamidogen		395.30	393.27	± 0.96	kJ/mol	40.0440 ± 0.0016	73456-14-1*0
Trioxidaniumyl		925.5	916.3	± 1.4	kJ/mol	50.01353 ± 0.00091	161321-37-5*2
Methyleneoxonium		152.53	144.21	± 0.49	kJ/mol	32.04186 ± 0.00090	177788-17-9*0
Hydroxymethylene anion		147.2	144.1	± 1.6	kJ/mol	30.02653 ± 0.00087	207914-87-2*1
Hydroxymethyliumylidene		986.01	987.65	± 0.83	kJ/mol	29.01749 ± 0.00086	60528-75-8*0
Isoformyl anion		55.7	58.4	± 1.8	kJ/mol	29.01859 ± 0.00086	81747-63-9*1
Carbonic acid		-602.28	-611.60	± 0.55	kJ/mol	62.0248 ± 0.0012	463-79-6*0
Peroxyformic acid		-265.3	-273.2	± 1.5	kJ/mol	62.0248 ± 0.0012	107-32-4*2
Chlorine difluoride cation		998.8	996.6	± 1.7	kJ/mol	73.44896 ± 0.00090	32629-46-2*0
1,3-Propanediyl		319.2	307.1	± 1.3	kJ/mol	42.0797 ± 0.0024	32458-33-6*11
Propan-1-yl-3-ylidene		554.4	545.7	± 1.3	kJ/mol	41.0718 ± 0.0024	50457-59-52
1-Propenylidene		392.5	388.1	± 1.1	kJ/mol	40.0639 ± 0.0024	70277-78-0*1
Cycloprop-2-enyl		490.32	485.77	± 0.57	kJ/mol	39.0559 ± 0.0024	28933-84-8*0
2-Propen-1-yl-3-ylidene		556.65	554.39	± 0.89	kJ/mol	39.0559 ± 0.0024	202744-74-9*0
2-Propynylidyne anion		540.77	545.54	± 0.75	kJ/mol	37.0406 ± 0.0024	82893-67-2*0
t-Butylium		733.95	710.67	± 0.98	kJ/mol	57.1137 ± 0.0033	14804-25-2*0
Oxygen anion monohydrate		-239.0	-244.2	± 3.0	kJ/mol	34.01523 ± 0.00062	31748-17-1*0
Methylcyclopropane		47.8	24.6	± 1.3	kJ/mol	56.1063 ± 0.0032	594-11-6*0
1,2-Butadienylium		1099.2	1089.9	± 1.2	kJ/mol	53.0820 ± 0.0032	65114-67-22
Hydrogen difluoride cation		1174.3	1171.3	± 1.5	kJ/mol	39.004198 ± 0.000070	126950-54-70
2-Hydroxy-1,1-dimethylethyl		-71.6	-96.5	± 1.4	kJ/mol	73.1137 ± 0.0033	5723-75-1*0
Vinylcyclopentadienyl		314.9	296.9	± 1.7	kJ/mol	91.1305 ± 0.0056	1201826-88-1*0
2,2-Dimethylbutane		-145.30	-185.72	± 0.75	kJ/mol	86.1754 ± 0.0049	75-83-2*0
n-Decane		-192.33	-249.07	± 0.75	kJ/mol	142.2817 ± 0.0081	124-18-5*0
Ethanol		-269.62	-277.38	± 0.20	kJ/mol	46.0684 ± 0.0017	64-17-5*500
(E)-Diazene cation		1132.53	1125.59	± 0.64	kJ/mol	30.02881 ± 0.00020	59952-06-6*0
Deuterium atom		219.804	221.717	± 0.000	kJ/mol	2.01410177800 ± 0.00000000040	16873-17-9*0
(Z)-Diazene	$[H]/N=N\[H]$	228.80	221.67	± 0.59	kJ/mol	30.02936 ± 0.00020	15626-42-3*0
Vinyl alcohol cation		786.62	775.40	± 0.80	kJ/mol	44.0520 ± 0.0017	57239-63-1*1
Vinoxy cation		1020.2	1013.2	± 1.5	kJ/mol	43.0441 ± 0.0016	35731-40-91
Vinoxide		-153.00	-160.05	± 0.56	kJ/mol	43.0452 ± 0.0016	35731-40-9*0
1-Hydroxyethenylium		841.7	834.9	± 1.4	kJ/mol	43.0441 ± 0.0016	41084-89-3*2
Oxiranyl anion		121.3	113.3	± 1.5	kJ/mol	43.0452 ± 0.0016	72722-59-9*2
COC vdW		589.7	598.4	± 1.5	kJ/mol	40.0208 ± 0.0016	12071-24-81
Oxirene		389.7	385.6	± 1.4	kJ/mol	42.0367 ± 0.0016	157-18-6*12
Chlorine chlorite		168.6	166.2	± 1.3	kJ/mol	102.9042 ± 0.0019	105206-44-8*3
Methanediol		-368.86	-381.80	± 0.73	kJ/mol	48.0413 ± 0.0010	463-57-0*2
Hydroxymethoxy anion		-373.81	-383.76	± 0.85	kJ/mol	47.0339 ± 0.0010	67899-36-9*2
Ethoxyoxoniumylidene		923.7	911.4	± 1.5	kJ/mol	61.0594 ± 0.0017	268728-77-4*1
Ethaneperoxolate		-120.49	-137.10	± 0.72	kJ/mol	61.0604 ± 0.0017	268728-75-2*3
Peroxychlorite		-34.5	-33.1	± 1.8	kJ/mol	83.4514 ± 0.0013	852472-63-0*2
Formyloxoniumylidene		1017.4	1014.0	± 1.4	kJ/mol	45.0169 ± 0.0010	54375-27-8*0
Dioxymethylene		364.0	361.7	± 2.4	kJ/mol	45.0174 ± 0.0010	438586-67-5*1
Cyanate		-221.16	-221.38	± 0.53	kJ/mol	42.01739 ± 0.00086	661-20-1*0
Oxazirinyl		450.1	450.9	± 1.5	kJ/mol	42.01684 ± 0.00086	228850-18-8*0
2-Propene-1,2-diol		-295.4	-314.9	± 1.2	kJ/mol	74.0785 ± 0.0025	44169-27-9*11
2-Methoxy-2-oxoethyl		-202.9	-218.1	± 1.5	kJ/mol	73.0706 ± 0.0025	54668-31-4*1
(Acetyloxy)methyl		-200.1	-213.9	± 1.5	kJ/mol	73.0706 ± 0.0025	2887-49-2*1
Glyoxal		-207.84	-213.40	± 0.55	kJ/mol	58.0361 ± 0.0017	107-22-2*0
Bifluoride		-68.0	-67.6	± 1.6	kJ/mol	39.005295 ± 0.000070	18130-74-01
Dimethylmethyleneammonium		697.1	672.0	± 1.3	kJ/mol	58.1018 ± 0.0025	28149-27-1*0
Hydroxyaminiumyl		1161.1	1158.2	± 1.4	kJ/mol	31.01353 ± 0.00032	63559-88-6*0
2-Methanidylidynehydrazin-2-ium-1-ide		281.8	279.1	± 1.4	kJ/mol	41.03267 ± 0.00082	947408-74-42
2-Methanidylidynehydrazin-2-ium-1-ide		518.6	516.1	± 1.6	kJ/mol	41.03267 ± 0.00082	947408-74-412
Isocyanamide		328.5	322.6	± 1.5	kJ/mol	42.04006 ± 0.00082	4702-38-9*0
Trichloromethide		-123.2	-122.7	± 2.0	kJ/mol	118.3693 ± 0.0028	14478-07-0*0
1,1,2,2-Tetrachloroethane		-146.7	-156.1	± 1.5	kJ/mol	167.8481 ± 0.0039	79-34-5*0
1,1,2,2-Tetrachloroethane		-172.9	-201.8	± 1.5	kJ/mol	167.8481 ± 0.0039	79-34-5*500
Pentachloroethane			-201.9	± 2.5	kJ/mol	202.2928 ± 0.0048	76-01-7*500
Trichloroethene			-48.8	± 1.5	kJ/mol	131.3874 ± 0.0031	79-01-6*590
Tetrachloroethene			-61.14	± 0.99	kJ/mol	165.8322 ± 0.0039	127-18-4*500
Trichloroethene		-10.9	-14.2	± 1.5	kJ/mol	131.3874 ± 0.0031	79-01-6*0
Oxofluoronium		1342.66	1342.61	± 0.80	kJ/mol	34.99725 ± 0.00030	12763-67-6*0
Bromodichloromethane		-34.8	-46.5	± 1.2	kJ/mol	163.8280 ± 0.0022	75-27-4*0
Difluorodibromomethane		-359.8	-377.8	± 1.3	kJ/mol	209.8155 ± 0.0022	75-61-6*0
Dichlorodibromomethane		28.3	12.4	± 1.2	kJ/mol	242.7241 ± 0.0028	594-18-3*0
Chlorosyl hydride		141.9	139.0	± 1.7	kJ/mol	52.46004 ± 0.00095	71572-35-5*0
Difluorobromomethane		-411.40	-424.60	± 0.47	kJ/mol	130.9194 ± 0.0013	1511-62-2*0
Hydroxyamidogen		123.3	116.7	± 1.7	kJ/mol	32.02202 ± 0.00034	13940-32-4*2
Aquachlorine cation		821.9	815.1	± 1.8	kJ/mol	53.46743 ± 0.00096	142599-65-3*0
1,2-Difluoroethane		-434.41	-447.83	± 0.80	kJ/mol	66.0500 ± 0.0016	624-72-6*0
Hydroxyaminylium		1019.5	1012.3	± 2.5	kJ/mol	32.02147 ± 0.00034	66097-71-0*1
Vinyl iodide		139.82	130.98	± 0.97	kJ/mol	153.9497 ± 0.0016	593-66-8*0
Fluoro(fluorooxy)methylene		-37.5	-39.1	± 1.4	kJ/mol	66.00691 ± 0.00085	479587-30-9*1
Benzenium		887.7	867.7	± 1.1	kJ/mol	79.1192 ± 0.0048	26812-57-7*0
Phenylium		1251.3	1238.2	± 1.6	kJ/mol	77.1034 ± 0.0048	17333-73-2*1
2-Hydrotrioxy anion		27.4	21.6	± 1.4	kJ/mol	49.00669 ± 0.00090	89965-38-80
Benzylium		929.55	910.06	± 0.51	kJ/mol	91.1299 ± 0.0056	6711-19-9*0
Benzylidene		473.0	457.7	± 1.3	kJ/mol	90.1225 ± 0.0056	3101-08-4*1
Cycloheptatetraene		418.7	403.1	± 1.3	kJ/mol	90.1225 ± 0.0056	52783-93-4*2
2,5-Norbornadien-7-yl		480.2	459.2	± 1.7	kJ/mol	91.1305 ± 0.0056	35430-15-0*0
Pentalene		389.9	373.6	± 1.4	kJ/mol	102.1332 ± 0.0064	250-25-9*0
Indenyl		299.2	279.2	± 1.6	kJ/mol	115.1519 ± 0.0072	71551-80-9*0
Benzoyl chloride			-157.11	± 0.26	kJ/mol	140.5667 ± 0.0057	98-88-4*500
Benzoyl chloride		-89.5	-104.8	± 1.2	kJ/mol	140.5667 ± 0.0057	98-88-4*0
Dioxosilane		-906.77	-911.75	± 0.63	kJ/mol	60.08430 ± 0.00067	7631-86-9*505
Hexafluorobenzene		-942.56	-947.56	± 0.87	kJ/mol	186.0546 ± 0.0048	392-56-3*0
Chlorobenzene cation		942.59	928.67	± 0.61	kJ/mol	112.5561 ± 0.0049	55450-32-3*0
Chlorobenzene			11.34	± 0.59	kJ/mol	112.5566 ± 0.0049	108-90-7*500
m-Chlorophenyl		321.7	311.0	± 1.6	kJ/mol	111.5487 ± 0.0049	3474-40-6*0
p-Chlorophenyl		324.6	313.8	± 1.6	kJ/mol	111.5487 ± 0.0049	2396-00-1*0
o-Chlorophenyl		328.9	318.2	± 1.6	kJ/mol	111.5487 ± 0.0049	3474-42-8*0
Bromobenzene cation		995.1	973.6	± 1.3	kJ/mol	157.0074 ± 0.0049	55450-33-4*0
Iodobenzene		113.7	113.8	± 1.1	kJ/mol	204.0084 ± 0.0048	591-50-4*500
Nitrobenzene		82.3	62.3	± 1.3	kJ/mol	123.1094 ± 0.0049	98-95-3*0
3-Methylenecyclopropene cation		1181.8	1174.7	± 1.2	kJ/mol	52.0740 ± 0.0032	79105-72-9*0
1-Hydroxy-1-methylethyl cation		521.4	501.0	± 1.2	kJ/mol	59.0865 ± 0.0025	5131-95-30
1-Hydroxypropyl		-55.3	-73.1	± 1.1	kJ/mol	59.0871 ± 0.0025	5723-77-3*0
1-Oxopropyl		-19.1	-31.9	± 1.1	kJ/mol	57.0712 ± 0.0024	15843-24-0*1
1,3-Butadien-2-ol		-53.3	-70.3	± 1.5	kJ/mol	70.0898 ± 0.0032	59120-04-6*11
Cyclopropanone		30.63	19.20	± 0.96	kJ/mol	56.0633 ± 0.0024	5009-27-8*0
2-Formylethen-1-ide		27.3	20.6	± 2.5	kJ/mol	55.0559 ± 0.0024	135924-69-5*11
Ethenedione		14.5	17.0	± 1.2	kJ/mol	56.0202 ± 0.0017	4363-38-6*0
Formylamidogen		76.5	71.1	± 1.1	kJ/mol	44.03272 ± 0.00087	14753-22-1*0
Formamide enol		-130.6	-141.8	± 1.4	kJ/mol	45.04066 ± 0.00088	60100-09-6*1
Formaldonitrone		78.4	67.1	± 1.4	kJ/mol	45.04066 ± 0.00088	67353-84-8*0
2-Cyclopropen-1-imine		401.9	394.2	± 1.4	kJ/mol	53.0627 ± 0.0024	31589-17-0*0
1-Isocyanovinyl		519.1	517.3	± 1.4	kJ/mol	52.0547 ± 0.0024	321850-14-0*0
Dioxyamidogen		240.4	233.8	± 1.8	kJ/mol	47.01348 ± 0.00061	71843-95-3*2
Vinylvinylidene		494.2	488.8	± 1.7	kJ/mol	52.0746 ± 0.0032	148759-16-4*2
But-1-en-3-yn-1-ide		422.5	421.1	± 1.3	kJ/mol	51.0672 ± 0.0032	119611-65-3*1
Tetrahedryl anion		634.5	630.7	± 1.6	kJ/mol	51.0672 ± 0.0032	138805-00-2*0
Chlorine fluoride cation		1165.52	1165.70	± 0.49	kJ/mol	54.45055 ± 0.00090	12432-44-9*0
Silicon carbide		739.3	744.2	± 2.3	kJ/mol	40.09620 ± 0.00085	409-21-2*0
Silicon carbide		-70.6	-71.6	± 1.5	kJ/mol	40.09620 ± 0.00085	409-21-2*501
Trifluorosilylium		-111.6	-114.4	± 1.8	kJ/mol	85.08016 ± 0.00030	38192-99-3*0
Silanide		69.3	63.7	± 1.3	kJ/mol	31.10987 ± 0.00037	15807-96-2*0
Dimethylsilanone		-237.5	-252.9	± 2.3	kJ/mol	74.1539 ± 0.0017	47956-45-6*0
Ethylsilane		-12.8	-35.3	± 1.8	kJ/mol	60.1704 ± 0.0017	2814-79-1*0
Hydroxysilyl anion		-219.2	-227.2	± 2.1	kJ/mol	47.10927 ± 0.00047	78450-47-2*1
Triprismane		576.0	556.7	± 1.3	kJ/mol	78.1118 ± 0.0048	650-42-0*0
Triiodide			-51.53	± 0.79	kJ/mol	380.713959 ± 0.000090	14900-04-0*800
Propargylallene		431.4	419.8	± 1.4	kJ/mol	78.1118 ± 0.0048	33142-15-3*3
Peroxychlorous acid		95.4	89.4	± 2.0	kJ/mol	84.4588 ± 0.0013	177778-92-6*1
1,4-Pentadiyne		460.2	454.6	± 1.1	kJ/mol	64.0853 ± 0.0040	24442-69-1*0
Biphenyl		206.9	178.8	± 1.1	kJ/mol	154.2078 ± 0.0096	92-52-4*0
Diacetylide		460.94	465.98	± 0.96	kJ/mol	49.0513 ± 0.0032	59012-21-4*0
2-Hydrotrioxy cation		1298.4	1291.8	± 1.4	kJ/mol	49.00559 ± 0.00090	74241-49-90
Sulfinyl hydride		-40.7	-47.6	± 1.2	kJ/mol	50.0813 ± 0.0060	25540-60-7*0
Sulfuric acid			-886.52	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*906
Fluoride			-334.67	± 0.15	kJ/mol	18.99895178 ± 0.00000050	16984-48-8*800
Bisulfite cation		554.0	545.3	± 1.3	kJ/mol	81.0716 ± 0.0061	43637-78-1*0
Sulfur tetraoxide		-228.2	-235.1	± 2.0	kJ/mol	96.0636 ± 0.0061	12772-98-4*11
Thioformaldehyde		121.3	117.6	± 2.0	kJ/mol	46.0926 ± 0.0061	865-36-1*2
Dimethylsulfoxide		-131.92	-150.57	± 0.57	kJ/mol	78.1344 ± 0.0062	67-68-5*0
Carbon disulfide		115.88	116.68	± 0.68	kJ/mol	76.1427 ± 0.0120	75-15-0*0
Hydrogen atom		-18.9	-21.4	± 4.3	kJ/mol	1.007940 ± 0.000070	12385-13-6*1002001
Hydrogen atom		-30.3	-32.7	± 5.3	kJ/mol	1.007940 ± 0.000070	12385-13-6*1002004
Vinylidene		610.62	610.33	± 0.39	kJ/mol	26.0373 ± 0.0016	2143-69-3*1
Triiodide		-254.3	-257.5	± 3.4	kJ/mol	380.713959 ± 0.000090	14900-04-0*0
Chlorine oxide peroxide		226.8	227.7	± 2.2	kJ/mol	83.4509 ± 0.0013	141801-67-4*100
Iminomethide		237.3	233.5	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*1
Dioxygen		94.410	94.383	± 0.000	kJ/mol	31.99880 ± 0.00060	7782-44-7*2
Hydrogen difluoride		-187.4	-187.1	± 1.6	kJ/mol	39.004746 ± 0.000070	12528-21-1*2
Cyanogen iodide anion		86.5	88.8	± 8.1	kJ/mol	152.92246 ± 0.00080	1356929-44-6*0
Methanol		-235.16	-238.49	± 0.14	kJ/mol	32.04186 ± 0.00090	67-56-1*500
Chlorohydrofluorine cation		1000.8	998.1	± 2.1	kJ/mol	55.45849 ± 0.00090	70110-63-3*0
Formaldehyde cation		944.860	941.239	± 0.096	kJ/mol	30.02543 ± 0.00087	54288-05-0*0
Isoformyl anion		267.4	268.0	± 1.6	kJ/mol	29.01859 ± 0.00086	81747-63-9*2
Trifluoromethide		-637.8	-639.6	± 1.8	kJ/mol	69.00646 ± 0.00080	54128-17-5*0
1,3-Propanediyl		358.7	343.7	± 1.4	kJ/mol	42.0797 ± 0.0024	32458-33-6*22
Dibromide		-197.0	-211.1	± 2.3	kJ/mol	159.8085 ± 0.0020	12595-70-9*0
Allene cation		1132.26	1125.11	± 0.22	kJ/mol	40.0633 ± 0.0024	65812-77-3*0
2-Propenylidene		417.5	410.0	± 1.5	kJ/mol	40.0639 ± 0.0024	19527-08-3*11
2-Propenylidene		452.73	445.59	± 0.90	kJ/mol	40.0639 ± 0.0024	19527-08-3*2
Cycloprop-1-enylide		373.7	369.2	± 1.7	kJ/mol	39.0565 ± 0.0024	80251-77-0*0
2-Cyclopropen-1-ylium-1-yl		1381.8	1380.8	± 1.1	kJ/mol	38.0474 ± 0.0024	85398-75-0*0
Propynylidene		597.8	599.6	± 1.2	kJ/mol	38.0480 ± 0.0024	67152-18-5*3
Propenediylidene		796.3	797.5	± 1.4	kJ/mol	38.0480 ± 0.0024	60731-11-5*0
n-Butylium		827.7	803.3	± 1.1	kJ/mol	57.1137 ± 0.0033	25453-90-1*0
Chlorosyl chloride		134.5	133.2	± 1.4	kJ/mol	86.9048 ± 0.0018	86825-56-1*0
2-Butynylium		1085.9	1077.6	± 1.3	kJ/mol	53.0820 ± 0.0032	64235-83-2*2
1-Methylene-2-propenyl anion		256.4	246.5	± 1.3	kJ/mol	53.0830 ± 0.0032	64480-63-3*0
1,3-Butadienyl anion		265.4	255.0	± 1.5	kJ/mol	53.0830 ± 0.0032	65114-68-3*0
Ethyloxoniumyl		783.3	766.4	± 1.7	kJ/mol	46.0679 ± 0.0017	34480-55-2*0
1-Hydroxyethyl		-41.35	-54.82	± 0.91	kJ/mol	45.0605 ± 0.0017	2348-46-1*2
1-Hydroxyethylium		608.87	594.45	± 0.38	kJ/mol	45.0600 ± 0.0017	18682-96-7*0
2-Hydroxyethylium		1019.3	1006.5	± 1.5	kJ/mol	45.0600 ± 0.0017	38607-31-7*3
Ethyloxoniumylidene		988.7	975.0	± 1.5	kJ/mol	45.0600 ± 0.0017	54387-07-4*0
Acetaldehyde cation		832.11	822.13	± 0.23	kJ/mol	44.0520 ± 0.0017	36505-03-0*0
1-Hydroxyethylidene		185.0	175.5	± 1.4	kJ/mol	44.0526 ± 0.0017	30967-49-8*1
Methoxymethylene		245.4	235.9	± 1.4	kJ/mol	44.0526 ± 0.0017	19527-10-7*1
Diiodide		-178.13	-180.72	± 0.48	kJ/mol	253.809489 ± 0.000060	12190-71-5*0
Oxiranylium		1233.6	1226.6	± 1.6	kJ/mol	43.0441 ± 0.0016	57789-76-1*1
Oxiranyl anion		141.0	135.0	± 1.6	kJ/mol	43.0452 ± 0.0016	72722-59-9*1
Dihydrogen cation		1488.364	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*0
Acetic acid			-485.10	± 0.27	kJ/mol	60.0520 ± 0.0017	64-19-7*800
Ketenyl anion		-48.44	-47.51	± 0.82	kJ/mol	41.0293 ± 0.0016	64066-01-9*0
Dicarbon monoxide anion		154.17	157.81	± 0.83	kJ/mol	40.0213 ± 0.0016	87191-88-6*0
Dicarbon monoxide		440.21	444.54	± 0.83	kJ/mol	40.0208 ± 0.0016	12071-23-7*2
COC vdW		726.2	734.6	± 1.7	kJ/mol	40.0208 ± 0.0016	12071-24-82
C=O-C cation		1585.8	1592.9	± 2.7	kJ/mol	40.0203 ± 0.0016	83483-98-1*1
C=O=C anion		550.3	554.0	± 1.7	kJ/mol	40.0213 ± 0.0016	87191-88-60
Oxirene cation		1106.2	1102.4	± 1.8	kJ/mol	42.0361 ± 0.0016	94664-69-4*0
Ethynol		95.30	92.81	± 0.73	kJ/mol	42.0367 ± 0.0016	32038-79-2*0
Ethynol		400.0	397.5	± 1.9	kJ/mol	42.0367 ± 0.0016	32038-79-2*11
Oxoethylidene		265.9	262.6	± 1.6	kJ/mol	42.0367 ± 0.0016	39920-84-8*11
1-Hydroperoxyethylium		841.4	829.3	± 1.7	kJ/mol	61.0594 ± 0.0017	126898-98-411
Ethenyldioxy		118.7	109.2	± 1.3	kJ/mol	59.0440 ± 0.0017	88181-72-0*1
Formic acid cation		723.8	716.7	± 1.2	kJ/mol	46.0248 ± 0.0010	50614-05-6*2
Formic acid anion		-256.2	-262.3	± 1.8	kJ/mol	46.0259 ± 0.0010	19066-82-1*1
Azanylium		1266.56	1264.49	± 0.11	kJ/mol	16.02207 ± 0.00016	15194-15-7*0
Dioxygenyl ion monohydrate		829.1	822.0	± 2.0	kJ/mol	50.01353 ± 0.00091	11083-61-7*0
Isocyanic acid cation		1003.01	1000.34	± 0.49	kJ/mol	43.02423 ± 0.00086	444010-28-0*0
Fulminic acid cation		1215.7	1212.9	± 1.3	kJ/mol	43.02423 ± 0.00086	114766-65-3*0
1,2-Ethenediol		-253.9	-266.3	± 1.3	kJ/mol	60.0520 ± 0.0017	1571-60-4*2
Diazenide		175.6	176.7	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*100
Hydrogen fluoride			-321.83	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*818
Acetyl chloride			-272.07	± 0.39	kJ/mol	78.4973 ± 0.0019	75-36-5*500
Methyl formate			-388.48	± 0.64	kJ/mol	60.0520 ± 0.0017	107-31-3*500
Ethyl formate		-355.3	-374.5	± 1.4	kJ/mol	74.0785 ± 0.0025	109-94-4*2
Acetoxy		-182.09	-190.91	± 0.80	kJ/mol	59.0440 ± 0.0017	13799-69-4*1
Fluoronium		1490.1	1491.4	± 1.9	kJ/mol	21.01373 ± 0.00014	12206-67-6*1
2-Methoxy-2-oxoethyl		-172.8	-188.0	± 1.7	kJ/mol	73.0706 ± 0.0025	54668-31-4*2
(Acetyloxy)methyl		-173.8	-186.8	± 1.7	kJ/mol	73.0706 ± 0.0025	2887-49-2*2
Hydroxyoxoethenyl		24.5	22.7	± 1.7	kJ/mol	57.0281 ± 0.0017	702699-39-6*0
Ammonium fluoride		-452.48	-467.05	± 0.38	kJ/mol	37.03690 ± 0.00029	12125-01-8*500
Isocyanomethylidyne		672.1	676.5	± 1.7	kJ/mol	38.0281 ± 0.0016	53590-27-5*0
Cyanomethylidyne		684.7	689.1	± 2.1	kJ/mol	38.0281 ± 0.0016	4120-02-9*0
Cyanoaminylium		1363.1	1360.8	± 1.3	kJ/mol	41.03157 ± 0.00082	205443-18-1*1
Hypochlorous acid			-125.526	± 0.050	kJ/mol	52.46004 ± 0.00095	7790-92-3*1000
Cyanoamidogen anion		69.72	66.72	± 0.72	kJ/mol	41.03267 ± 0.00082	67131-47-9*0
Diazomethylium		1395.7	1394.1	± 1.3	kJ/mol	41.03157 ± 0.00082	271249-81-1*1
Diazomethanide		305.17	302.08	± 0.76	kJ/mol	41.03267 ± 0.00082	100840-43-5*0
2-Methyliumylidynehydrazin-2-ium-1-ide		1544.1	1542.4	± 1.7	kJ/mol	41.03157 ± 0.00082	947408-73-32
2-Methyliumylidynehydrazin-2-ium-1-ide		1563.1	1561.5	± 1.5	kJ/mol	41.03157 ± 0.00082	947408-73-31
Dioxymethylidyne		299.8	301.1	± 1.7	kJ/mol	44.00950 ± 0.00100	791121-04-5*0
Nitrilomethylimidogen		728.7	725.6	± 2.4	kJ/mol	41.03212 ± 0.00082	324529-58-0*1
Methanediimine		153.1	146.5	± 1.3	kJ/mol	42.04006 ± 0.00082	151-51-9*0
Trihydrogen dioxide anion		-487.4	-495.7	± 1.1	kJ/mol	35.02317 ± 0.00064	12501-19-8*0
Tetrachloromethane		-104.57	-123.98	± 0.41	kJ/mol	153.8215 ± 0.0037	56-23-5*500
Dichloromethylene anion		75.97	78.25	± 0.77	kJ/mol	82.9166 ± 0.0020	118364-73-1*0
Dichloromethylium		895.4	892.2	± 1.2	kJ/mol	83.9235 ± 0.0020	56932-33-3*0
Dichloromethide		-40.7	-42.4	± 2.0	kJ/mol	83.9246 ± 0.0020	32180-91-9*0
Chloromethylium		962.4	958.5	± 1.2	kJ/mol	49.4787 ± 0.0012	59000-00-9*0
Fluorosyl fluoride		192.8	193.3	± 2.3	kJ/mol	53.99621 ± 0.00030	86825-57-2*1
Chloromethylene		346.23	346.53	± 0.89	kJ/mol	48.4713 ± 0.0012	2108-20-5*1
Ammonium nitrate		-350.21	-365.17	± 0.18	kJ/mol	80.04344 ± 0.00095	6484-52-2*500
Ammonia			-80.884	± 0.053	kJ/mol	17.03056 ± 0.00022	7664-41-7*1000
1,2-Dichloroethane			-165.66	± 0.56	kJ/mol	98.9586 ± 0.0024	107-06-2*500
1,1-Dichloroethane			-163.75	± 0.48	kJ/mol	98.9586 ± 0.0024	75-34-3*500
1,1,2-Trichloroethane			-187.6	± 1.1	kJ/mol	133.4033 ± 0.0031	79-00-5*500
Pentachloroethane		-150.5	-156.5	± 1.9	kJ/mol	202.2928 ± 0.0048	76-01-7*0
Hydrogen fluoride			-321.69	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*815
1-Chloro ozone		226.4	223.1	± 2.3	kJ/mol	83.4509 ± 0.0013	141801-66-3*101
Chloroform			-130.84	± 0.42	kJ/mol	119.3767 ± 0.0028	67-66-3*590
Chlorodibromomethane		22.0	3.2	± 3.5	kJ/mol	208.2793 ± 0.0023	124-48-1*0
Oxochloronium		1150.86	1150.70	± 0.66	kJ/mol	51.45155 ± 0.00095	12301-79-0*0
Bromochloromethane		-28.2	-42.3	± 1.3	kJ/mol	129.3833 ± 0.0016	74-97-5*0
Fluoromethylene		148.39	148.68	± 0.43	kJ/mol	32.01704 ± 0.00080	13453-52-6*0
Ethyl iodide		8.70	-7.17	± 0.48	kJ/mol	155.9656 ± 0.0016	75-03-6*0
2-Cyclopropyn-1-ylidene		898.4	905.3	± 1.5	kJ/mol	36.0321 ± 0.0024	102508-15-6*1
1,2-Dibromoacetylene		333.1	322.1	± 2.3	kJ/mol	183.8294 ± 0.0026	624-61-3*0
2-Cyclopropyn-1-ylium-1-yl		1939.1	1947.0	± 1.3	kJ/mol	36.0316 ± 0.0024	154702-35-9*0
Fluoro(fluorooxy)methylene		-97.5	-95.7	± 1.6	kJ/mol	66.00691 ± 0.00085	479587-30-9*101
Fluorooxomethylium		724.9	724.5	± 1.2	kJ/mol	47.00795 ± 0.00085	38264-00-5*0
Fluoroisoformyl		-37.8	-32.4	± 1.6	kJ/mol	47.00850 ± 0.00085	1871-24-50
Hydroxyimidogen		217.89	215.01	± 0.78	kJ/mol	31.01408 ± 0.00032	35337-59-8*0
Benzene cation		992.57	976.11	± 0.21	kJ/mol	78.1113 ± 0.0048	34504-50-2*0
Nitrous acid		-71.37	-77.73	± 0.26	kJ/mol	47.01348 ± 0.00061	7782-77-6*2
Benzocyclopropene		395.9	379.6	± 1.5	kJ/mol	90.1225 ± 0.0056	4646-69-9*2
3-Methylphenyl		324.4	306.4	± 1.2	kJ/mol	91.1305 ± 0.0056	3474-41-7*0
2-Methylphenyl		324.5	306.5	± 1.2	kJ/mol	91.1305 ± 0.0056	22904-44-5*0
4-Methylphenyl		327.2	309.2	± 1.2	kJ/mol	91.1305 ± 0.0056	2396-02-3*0
Azidonitrene		692.1	687.5	± 1.4	kJ/mol	56.02696 ± 0.00028	147363-92-6*2
1,3-Butadiyne-1,4-diyl		1052.20	1062.17	± 0.64	kJ/mol	48.0428 ± 0.0032	78015-07-3*0
Indenylium		1030.2	1010.7	± 2.0	kJ/mol	115.1513 ± 0.0072	12203-21-3*2
Hydrogen fluoride			-321.89	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*820
Benzoic acid		-367.34	-384.75	± 0.17	kJ/mol	122.1213 ± 0.0056	65-85-0*500
2,3-Dimethylbenzaldehyde		-65.7	-93.7	± 2.4	kJ/mol	134.1751 ± 0.0072	5779-93-1*0
(2,3-dimethylphenyl)oxomethyl		83.2	60.5	± 2.6	kJ/mol	133.1672 ± 0.0072	104680-89-90
m-Chlorophenide		172.5	162.3	± 1.5	kJ/mol	111.5492 ± 0.0049	77748-34-6*0
p-Chlorophenide		179.5	169.1	± 1.5	kJ/mol	111.5492 ± 0.0049	77748-42-6*0
o-Chlorophenide		158.7	148.7	± 1.5	kJ/mol	111.5492 ± 0.0049	72863-53-7*0
2-Oxopropylium		784.7	770.9	± 1.7	kJ/mol	57.0707 ± 0.0024	54088-52-7*0
2,3-Butanedione		-310.67	-327.24	± 0.62	kJ/mol	86.0892 ± 0.0033	431-03-8*0
1,2-Dibromoethane		-11.5	-38.3	± 1.2	kJ/mol	187.8612 ± 0.0026	106-93-4*0
Dimethylketene		-73.3	-88.2	± 1.2	kJ/mol	70.0898 ± 0.0032	598-26-5*0
2-Methyloxirene		344.0	334.0	± 1.8	kJ/mol	56.0633 ± 0.0024	2835-41-8*11
3-Oxo-1-propenylium		1185.6	1179.6	± 3.0	kJ/mol	55.0548 ± 0.0024	101705-90-2*111
Nitronium		961.79	958.23	± 0.20	kJ/mol	46.00499 ± 0.00060	14522-82-8*0
(Hydroxyimino)methyl		250.2	244.0	± 1.8	kJ/mol	44.03272 ± 0.00087	206442-92-4*1
Hydrogen chloride			-166.990	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*800
1-Isocyanoethylidene		545.6	540.7	± 1.6	kJ/mol	53.0627 ± 0.0024	498544-34-61
3-Imino-2-propen-1-ylidene		571.8	566.9	± 1.6	kJ/mol	53.0627 ± 0.0024	916765-05-4*21
2-(Methylidyneamino)ethenyl		634.5	629.8	± 1.6	kJ/mol	53.0627 ± 0.0024	123416-74-0*21
Azete		469.5	461.4	± 1.5	kJ/mol	53.0627 ± 0.0024	287-24-1*0
2-Cyanovinylium		1517.3	1515.1	± 1.8	kJ/mol	52.0542 ± 0.0024	85398-67-0*21
2-Cyanovinyl anion		263.7	260.8	± 1.8	kJ/mol	52.0553 ± 0.0024	85398-67-02
2-Isocyanovinyl		543.2	541.3	± 1.7	kJ/mol	52.0547 ± 0.0024	225798-14-1*1
3-Oxo-1,2-propadienylidene		330.4	336.4	± 1.8	kJ/mol	52.0315 ± 0.0024	11127-17-6*0
Vinylacetylene cation		1221.8	1215.3	± 1.1	kJ/mol	52.0740 ± 0.0032	59699-48-8*0
Bicyclo[1.1.0]but-2-ylium-1-yl		1287.1	1278.1	± 1.4	kJ/mol	52.0740 ± 0.0032	78525-41-40
Peroxyimidogen		405.4	403.4	± 1.9	kJ/mol	46.00554 ± 0.00060	60488-31-50
Hydroxydioxonitrate		-193.2	-197.5	± 2.4	kJ/mol	63.01343 ± 0.00091	58875-09-5*0
3-Methylene-1-cyclopropen-1-yl anion		417.3	413.6	± 1.6	kJ/mol	51.0672 ± 0.0032	117469-28-00
2-Cyclopropen-1-ylidenemethyl		635.8	632.7	± 1.3	kJ/mol	51.0666 ± 0.0032	127611-25-0*0
Fulvenone		117.3	107.1	± 1.6	kJ/mol	92.0954 ± 0.0048	4727-22-4*0
Silicon cation		1236.86	1240.99	± 0.56	kJ/mol	28.08495 ± 0.00030	14067-07-3*0
Disilicon		587.5	591.3	± 1.6	kJ/mol	56.17100 ± 0.00060	12597-35-2*0
Fluorochlorate		-256.03	-255.43	± 0.81	kJ/mol	54.45165 ± 0.00090	12272-56-9*0
Ethylene cation		1075.20	1067.99	± 0.11	kJ/mol	28.0526 ± 0.0016	34470-02-5*0
Fluorosilyliumylidene		651.11	652.24	± 0.98	kJ/mol	47.08335 ± 0.00030	12518-09-1*0
Disiloxane		-330.3	-347.3	± 2.3	kJ/mol	78.21804 ± 0.00079	13597-73-4*0
Iodotrimethylsilane		-189.7	-214.5	± 2.1	kJ/mol	200.0935 ± 0.0025	16029-98-4*0
Oxadiazirene		351.7	349.9	± 1.7	kJ/mol	44.01288 ± 0.00033	227934-45-4*0
1,2,3,5-Hexatetraene		391.8	380.0	± 1.6	kJ/mol	78.1118 ± 0.0048	60239-33-0*1
1,2,3-Pentatriene		302.7	290.4	± 1.4	kJ/mol	66.1011 ± 0.0040	62018-46-6*0
(Z)-1-Methylallyl	$C/C=C\[CH2]$	154.73	137.34	± 0.99	kJ/mol	55.0984 ± 0.0032	98705-00-1*0
NON		545.5	542.6	± 1.7	kJ/mol	44.01288 ± 0.00033	227934-46-5*0
2,4-Cyclopentadien-1-ylidene		526.1	517.2	± 1.1	kJ/mol	64.0853 ± 0.0040	4729-01-5*1
Anthracene		255.99	226.97	± 0.92	kJ/mol	178.2292 ± 0.0112	120-12-7*0
Helium hydride cation		1350.148	1348.258	± 0.000	kJ/mol	5.009993 ± 0.000070	17009-49-3*0
Monosulfur anion		76.42	78.48	± 0.14	kJ/mol	32.0665 ± 0.0060	14337-03-2*0
Thiozone		144.27	142.91	± 0.71	kJ/mol	96.1980 ± 0.0180	12597-03-4*0
Hydrosulfide		-80.53	-80.53	± 0.18	kJ/mol	33.0745 ± 0.0060	15035-72-0*0
Sulfuric acid			-895.16	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*898
Hydrogen sulfate		-944.0	-954.4	± 1.4	kJ/mol	97.0721 ± 0.0061	14996-02-2*0
Dihydrogen fluoride anion		-257.0	-260.1	± 1.9	kJ/mol	21.01483 ± 0.00014	117339-92-12
Dioxoperoxysulfate		-502.6	-506.5	± 2.0	kJ/mol	96.0641 ± 0.0061	103613-08-7*1
Dimethyl sulfide		-63.12	-64.73	± 0.33	kJ/mol	62.1350 ± 0.0062	75-18-3*500
(Methylthio)methyl		149.5	137.8	± 1.4	kJ/mol	61.1271 ± 0.0062	31533-72-9*0
Hydrogen atom		-22.3	-25.6	± 1.5	kJ/mol	1.007940 ± 0.000070	12385-13-6*1001001
Hydrogen atom		-33.4	-36.7	± 1.5	kJ/mol	1.007940 ± 0.000070	12385-13-6*1001004
Bromine dioxide		165.6	156.0	± 2.1	kJ/mol	111.9028 ± 0.0012	21255-83-4*0
Deuterium atom cation		1532.210	1534.123	± 0.000	kJ/mol	2.01355319809 ± 0.00000000040	14464-47-2*0
Propylidene		355.7	340.3	± 2.0	kJ/mol	42.0797 ± 0.0024	6700-78-3*21
Chlorine difluoride anion		-504.9	-505.7	± 1.9	kJ/mol	73.45005 ± 0.00090	16892-05-0*0
Cyclopropylium		1101.54	1088.73	± 0.73	kJ/mol	41.0713 ± 0.0024	1724-43-2*200
Nitrosyl nitrate		70.6	62.3	± 1.8	kJ/mol	92.0111 ± 0.0012	15969-55-80
Fluorine atom cation		1758.301	1760.600	± 0.017	kJ/mol	18.99785462 ± 0.00000050	14701-13-4*0
Propyne cation		1192.66	1186.94	± 0.38	kJ/mol	40.0633 ± 0.0024	34526-53-9*0
Peroxychlorite		-116.2	-114.8	± 2.3	kJ/mol	83.4514 ± 0.0013	852472-63-0*1
Cyclopropylidene		544.8	535.9	± 1.5	kJ/mol	40.0639 ± 0.0024	2143-70-6*2
Dioxofluorine		524.0	523.2	± 1.0	kJ/mol	50.99720 ± 0.00060	175861-93-5*0
Bifluoride		-705.22	-709.07	± 0.35	kJ/mol	39.005295 ± 0.000070	18130-74-0*0
Fluoroniumyl ion		1275.556	1275.788	± 0.022	kJ/mol	20.005795 ± 0.000070	12381-92-9*0
Propynylidene cation		1409.59	1412.15	± 0.82	kJ/mol	38.0474 ± 0.0024	75123-91-0*0
Propynylidene		597.6	599.4	± 1.1	kJ/mol	38.0480 ± 0.0024	67152-18-5*4
Chlorine difluoride		22.5	23.9	± 1.9	kJ/mol	73.44951 ± 0.00090	91483-78-2*0
Propadienylidenide		381.17	382.07	± 0.40	kJ/mol	38.0485 ± 0.0024	109292-49-1*0
1,2-Propadien-1-ylium-1-yl		1561.6	1562.8	± 1.4	kJ/mol	38.0474 ± 0.0024	110714-00-6*0
Sulfuryl dichloride		-348.06	-354.22	± 0.75	kJ/mol	134.9702 ± 0.0063	7791-25-5*0
n-Pentane		-155.83	-172.80	± 0.29	kJ/mol	72.1488 ± 0.0041	109-66-0*500
iso-Pentane			-178.20	± 0.39	kJ/mol	72.1488 ± 0.0041	78-78-4*500
neo-Pentane			-189.54	± 0.38	kJ/mol	72.1488 ± 0.0041	463-82-1*500
Cyclopentane			-104.65	± 0.38	kJ/mol	70.1329 ± 0.0041	287-92-3*590
[1.1.1]Propellane		378.6	361.0	± 1.5	kJ/mol	66.1011 ± 0.0040	35634-10-7*2
2-Methylpentane		-134.48	-173.73	± 0.73	kJ/mol	86.1754 ± 0.0049	107-83-5*0
3-Methylpentane		-131.92	-171.43	± 0.76	kJ/mol	86.1754 ± 0.0049	96-14-0*0
2,3-Dimethylbutane		-136.51	-177.60	± 0.81	kJ/mol	86.1754 ± 0.0049	79-29-8*0
Cyclohexane		-131.81	-155.94	± 0.28	kJ/mol	84.1595 ± 0.0049	110-82-7*500
1,5-Hexadiene		108.49	83.90	± 0.39	kJ/mol	82.1436 ± 0.0049	592-42-7*0
1-Hydroxyethyl		-42.72	-56.15	± 0.46	kJ/mol	45.0605 ± 0.0017	2348-46-1*0
2-Hydroxyethyl		-5.8	-18.2	± 1.5	kJ/mol	45.0605 ± 0.0017	4422-54-2*3
(E)-Diazene anion		265.6	258.7	± 2.0	kJ/mol	30.02991 ± 0.00020	59952-06-60
1-Chloro ozone anion		-66.9	-68.8	± 2.1	kJ/mol	83.4514 ± 0.0013	224299-15-4*1
(Z)-Diazene cation	$[H]/N=[N+]\[H]$	1157.0	1150.2	± 1.3	kJ/mol	30.02881 ± 0.00020	86631-37-0*0
1-Hydroxyethenyl anion		15.1	7.8	± 2.1	kJ/mol	43.0452 ± 0.0016	112539-13-6*22
Acetylene anion		356.9	356.7	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*1
Iminomethide		252.6	248.9	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*2
Dicarbon monoxide cation		1433.9	1439.0	± 2.1	kJ/mol	40.0203 ± 0.0016	12287-08-0*0
1-Hydrazinylium-1-yl		1143.4	1136.4	± 1.4	kJ/mol	30.02881 ± 0.00020	63986-30-1*0
C=O-C cation		1816.8	1820.9	± 2.0	kJ/mol	40.0203 ± 0.0016	83483-98-1*2
Hydrogen cyanide cation		1442.53	1442.06	± 0.20	kJ/mol	27.02483 ± 0.00081	12601-62-6*0
Oxirene anion		288.1	285.2	± 2.2	kJ/mol	42.0372 ± 0.0016	157-18-60
Oxoethylidene		261.1	258.3	± 1.1	kJ/mol	42.0367 ± 0.0016	39920-84-8*1
Tetraoxidanyl		2.1	0.4	± 2.9	kJ/mol	65.0055 ± 0.0012	69696-93-1*100
Methanediol		-378.47	-391.56	± 0.62	kJ/mol	48.0413 ± 0.0010	463-57-0*0
Ethoxyoxoniumylidene		962.4	945.9	± 1.7	kJ/mol	61.0594 ± 0.0017	268728-77-4*22
2-Hydroperoxyethylium		999.8	988.9	± 1.7	kJ/mol	61.0594 ± 0.0017	84824-62-41
Formic acid anion		-241.2	-246.9	± 1.9	kJ/mol	46.0259 ± 0.0010	19066-82-1*2
Iodine		198.109	197.709	± 0.0021	kJ/mol	126.904470 ± 0.000030	14362-44-8*2
Dioxirane cation		1050.8	1043.1	± 2.0	kJ/mol	46.0248 ± 0.0010	232262-10-1*0
Dioxymethyl cation		1074.8	1068.5	± 1.7	kJ/mol	46.0248 ± 0.0010	232262-11-2*0
Dioxymethylene		341.8	339.8	± 3.0	kJ/mol	45.0174 ± 0.0010	438586-67-5*2
OH-CO vdW complex		-80.50	-76.77	± 0.85	kJ/mol	45.0174 ± 0.0010	2564-85-4100
CO-HO vdW complex		-77.5	-73.3	± 1.3	kJ/mol	45.0174 ± 0.0010	2564-84-3100
Nitrilomethylium		1783.12	1786.60	± 0.48	kJ/mol	26.01689 ± 0.00080	12539-57-0*0
Cyanato cation		1261.52	1262.02	± 0.58	kJ/mol	42.01629 ± 0.00086	17247-99-3*0
Nitrosomethyliumylidene		1509.8	1510.9	± 1.7	kJ/mol	42.01629 ± 0.00086	67197-19-7*0
Fulminate		59.5	59.8	± 1.7	kJ/mol	42.01739 ± 0.00086	28269-67-2*0
Trifluoride ion		-348.6	-349.4	± 2.5	kJ/mol	56.9957582 ± 0.0000015	25730-99-8*0
Hydrogen fluoride			-321.85	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*902
Diazenide		347.5	344.6	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*1
Aminyliumyl		1659.04	1659.97	± 0.23	kJ/mol	15.014131 ± 0.000099	19067-62-0*0
Glyoxal		-189.39	-194.84	± 0.70	kJ/mol	58.0361 ± 0.0017	107-22-2*2
Ethynediol		-18.3	-22.1	± 1.6	kJ/mol	58.0361 ± 0.0017	16005-17-7*0
Dimethylaminylium		1040.9	1025.5	± 1.8	kJ/mol	44.0752 ± 0.0017	49784-85-2*0
Trioxidanylium		1085.5	1079.2	± 1.4	kJ/mol	49.00559 ± 0.00090	74241-49-9*2
Hydroxylamine		-15.3	-25.9	± 1.4	kJ/mol	33.02996 ± 0.00037	7803-49-8*2
Hydroxylamine cation		857.7	847.9	± 1.6	kJ/mol	33.02941 ± 0.00037	62675-55-2*0
Ethylimidogen		306.1	291.5	± 2.0	kJ/mol	43.0678 ± 0.0016	27770-44-1*0
Diisocyanogen		610.9	613.2	± 1.7	kJ/mol	52.0349 ± 0.0016	78800-21-2*0
Cyanoamidogen anion		391.7	389.4	± 1.8	kJ/mol	41.03267 ± 0.00082	67131-47-9*12
Diazirenide		454.9	452.2	± 1.5	kJ/mol	41.03267 ± 0.00082	130614-84-5*0
Cyanamide cation		1158.7	1152.4	± 1.5	kJ/mol	42.03951 ± 0.00082	148556-23-4*0
Dihydrooxooxygen cation		994.9	988.2	± 1.6	kJ/mol	34.01413 ± 0.00062	177329-59-8*0
Nitrogen hydride oxide		72.2	61.0	± 1.3	kJ/mol	33.02996 ± 0.00037	38544-48-8*0
3-Diaziridinylidene		521.8	515.0	± 1.5	kJ/mol	42.04006 ± 0.00082	85513-79-7*1
Diazomethylene		577.8	578.5	± 2.2	kJ/mol	40.02418 ± 0.00081	2468-81-7*0
Dichloromethylene		313.98	315.18	± 0.90	kJ/mol	82.9161 ± 0.0020	1605-72-7*1
Chloromethyliumyl		1207.4	1207.7	± 2.0	kJ/mol	48.4708 ± 0.0012	89877-51-0*0
Chloromethylene anion		203.53	204.34	± 0.94	kJ/mol	48.4719 ± 0.0012	75466-08-9*0
Chlorohydroxymethyl		-46.0	-51.6	± 2.0	kJ/mol	65.4787 ± 0.0012	147139-06-8*2
Aminooxy cation		945.98	938.85	± 0.76	kJ/mol	32.02147 ± 0.00034	51375-41-80
1,1,1,2-Tetrachloroethane			-193.5	± 1.1	kJ/mol	167.8481 ± 0.0039	630-20-6*500
Hexachloroethane			-214.1	± 2.8	kJ/mol	236.7376 ± 0.0056	67-72-1*500
3-Chloro-3-methyl-3H-diazirine		251.5	239.6	± 2.7	kJ/mol	90.5114 ± 0.0019	4222-21-3*0
trans-1,2-Dichloroethene	$C(\Cl)=C/Cl$	5.64	0.22	± 0.56	kJ/mol	96.9427 ± 0.0024	156-60-5*0
Ethynylene cation		1964.93	1971.52	± 0.40	kJ/mol	24.0209 ± 0.0016	12595-79-8*0
Hydrofluorate ion		-75.6	-75.1	± 1.8	kJ/mol	20.006892 ± 0.000070	37249-79-9*0
Fluorochlorobromomethane		-218.3	-230.9	± 4.9	kJ/mol	147.3737 ± 0.0016	593-98-6*0
Fluoromethyliumyl		1116.6	1116.9	± 1.7	kJ/mol	32.01649 ± 0.00080	89877-52-1*0
Fluoromethylene anion		95.94	96.47	± 0.61	kJ/mol	32.01759 ± 0.00080	71267-42-0*0
Trioxidanyl		26.35	23.08	± 0.19	kJ/mol	49.00614 ± 0.00090	12500-78-6*2
Polytetrafluoroethylene			-829.96	± 0.54	kJ/mol	100.0150 ± 0.0016	9002-84-0*591
Hydroxyaminylium		1048.5	1041.3	± 2.6	kJ/mol	32.02147 ± 0.00034	66097-71-0*2
trans-1,2-Difluoroethene		-299.75	-306.18	± 0.83	kJ/mol	64.0341 ± 0.0016	1630-78-0*0
Hydroxyamidogen anion		90.6	84.8	± 2.8	kJ/mol	32.02257 ± 0.00034	66097-71-00
Fluoroethynide		133.3	137.5	± 1.5	kJ/mol	43.0204 ± 0.0016	85905-56-2*0
Formyl fluoride cation		816.6	813.3	± 1.3	kJ/mol	48.01589 ± 0.00086	99766-68-4*0
Formyl fluoride		-405.2	-403.7	± 1.6	kJ/mol	47.00905 ± 0.00085	62227-71-8*0
Methyleneoxonium cation		827.8	818.3	± 1.7	kJ/mol	32.04131 ± 0.00090	177788-17-90
Fluoroisoformyl cation		1347.4	1349.5	± 1.9	kJ/mol	47.00795 ± 0.00085	1871-25-60
Ammonium hydroxide		-360.46	-361.54	± 0.57	kJ/mol	35.04584 ± 0.00047	1336-21-6*500
Trioxidaniumyl		935.2	926.1	± 1.5	kJ/mol	50.01353 ± 0.00091	161321-37-5*3
o-Benzyne cation		1392.1	1384.1	± 1.6	kJ/mol	76.0954 ± 0.0048	70220-84-7*0
m-Benzyne cation		1363.1	1354.5	± 1.5	kJ/mol	76.0954 ± 0.0048	121058-08-0*0
p-Benzyne		603.5	594.2	± 1.2	kJ/mol	76.0960 ± 0.0048	3355-34-8*1
Azidonitrene		660.8	657.7	± 1.6	kJ/mol	56.02696 ± 0.00028	147363-92-6*1
Ammonium hydroxide			-362.837	± 0.061	kJ/mol	35.04584 ± 0.00047	1336-21-6*800
1,3-Cycloheptadiene		123.65	94.54	± 0.78	kJ/mol	94.1543 ± 0.0056	4054-38-0*1
Tropylium		899.19	879.42	± 0.99	kJ/mol	91.1299 ± 0.0056	26811-28-9*0
Hexafluorobenzene		-997.17	-983.38	± 0.87	kJ/mol	186.0546 ± 0.0048	392-56-3*500
Hydroxymethylene cation		986.4	982.8	± 1.6	kJ/mol	30.02543 ± 0.00087	135395-06-1*2
Dihydrogen fluoride		-55.9	-54.9	± 1.6	kJ/mol	21.01428 ± 0.00014	12592-22-2*1
Chlorite		-105.51	-107.68	± 0.37	kJ/mol	67.4520 ± 0.0011	14998-27-7*0
Hydroxymethylene cation		1482.1	1479.4	± 1.9	kJ/mol	30.02543 ± 0.00087	135395-06-1*3
Perchloryloxy		248.4	240.8	± 1.8	kJ/mol	99.4503 ± 0.0015	12133-63-0*0
cis-1,2-Dibromoethene	$C(\Br)=C\Br$	121.5	100.9	± 2.0	kJ/mol	185.8453 ± 0.0026	590-11-4*0
Hydroxymethylene anion		160.2	157.5	± 1.7	kJ/mol	30.02653 ± 0.00087	207914-87-2*2
1,1-Dibromoethane		-4.8	-31.8	± 1.8	kJ/mol	187.8612 ± 0.0026	557-91-5*0
Hydroxymethylene anion		334.0	334.8	± 2.1	kJ/mol	30.02653 ± 0.00087	207914-87-2*3
Nitrous acid		-72.987	-78.644	± 0.077	kJ/mol	47.01348 ± 0.00061	7782-77-6*0
Carbamoyl		74.1	67.7	± 2.7	kJ/mol	44.03272 ± 0.00087	2858-51-71
Perchlorate		-263.9	-272.8	± 2.1	kJ/mol	99.4508 ± 0.0015	14797-73-0*0
Formaldiminoxy		160.9	154.0	± 1.5	kJ/mol	44.03272 ± 0.00087	2683-96-7*0
Hydrogen peroxide cation		931.06	924.20	± 0.98	kJ/mol	34.01413 ± 0.00062	12325-10-9*2
Aquacarbon		467.6	465.5	± 1.9	kJ/mol	30.02598 ± 0.00087	81434-73-3*102
Formaldoxime		50.7	39.8	± 1.8	kJ/mol	45.04066 ± 0.00088	75-17-2*2
Ethane cation		1043.13	1029.12	± 0.59	kJ/mol	30.0685 ± 0.0017	34488-65-8*0
Oxaziridine		115.6	103.8	± 2.1	kJ/mol	45.04066 ± 0.00088	6827-26-5*0
Cyanoethynyl		715.7	722.2	± 1.1	kJ/mol	50.0388 ± 0.0024	62435-43-2*0
Aquacarbon cation		1196.1	1193.0	± 1.7	kJ/mol	30.02543 ± 0.00087	81434-73-30
Dioxaziridinyl cation		1365.9	1363.3	± 1.7	kJ/mol	46.00499 ± 0.00060	66252-29-70
2-Methylene-2H-azirine		404.3	396.9	± 1.7	kJ/mol	53.0627 ± 0.0024	110027-86-6*0
Dioxaziridinyl anion		295.9	293.4	± 1.7	kJ/mol	46.00609 ± 0.00060	66252-31-1*0
2-Cyanovinylium		1517.4	1515.2	± 1.8	kJ/mol	52.0542 ± 0.0024	85398-67-0*22
2-Cyanovinyl anion		266.2	263.3	± 1.8	kJ/mol	52.0553 ± 0.0024	85398-67-01
Nitrosyl fluoride		-85.48	-87.85	± 0.76	kJ/mol	49.00454 ± 0.00031	7789-25-5*0
2-Isocyanovinyl		544.6	542.6	± 1.7	kJ/mol	52.0547 ± 0.0024	225798-14-1*2
Cyanomethylene		529.4	530.4	± 1.3	kJ/mol	39.0361 ± 0.0016	2612-62-6*2
Isocyanomethylene		585.2	586.3	± 1.6	kJ/mol	39.0361 ± 0.0016	78694-65-2*2
3-Methylcycloprop-3-en-2-ylium-1-yl		1284.0	1277.5	± 1.5	kJ/mol	52.0740 ± 0.0032	185841-59-20
Fluorodioxidenium		1221.9	1219.5	± 2.0	kJ/mol	50.99665 ± 0.00060	139584-95-5*0
Vinylvinylidene cation		1429.9	1424.2	± 2.0	kJ/mol	52.0740 ± 0.0032	161054-20-2*1
1,2-Butadien-1-ylidene		511.8	506.3	± 2.0	kJ/mol	52.0746 ± 0.0032	119908-55-3*2
1-Buten-3-ynylium		1482.4	1479.9	± 1.4	kJ/mol	51.0661 ± 0.0032	84654-85-3*1
3-Buten-1-ynylium		1572.7	1570.3	± 1.7	kJ/mol	51.0661 ± 0.0032	103928-84-3*1
3-Methylene-1-cyclopropen-1-ylium		1398.8	1395.5	± 1.7	kJ/mol	51.0661 ± 0.0032	117469-28-0*2
Fluorodioxidanide		-256.8	-256.1	± 1.9	kJ/mol	50.99775 ± 0.00060	23553-17-5*0
Butyraldehyde		-185.28	-205.65	± 0.85	kJ/mol	72.1057 ± 0.0033	123-72-8*0
Nitric acid		-178.99	-173.26	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*500
Chloroallene		181.9	175.2	± 1.6	kJ/mol	74.5086 ± 0.0026	3223-70-9*0
1-Chloropropyne		192.0	187.9	± 1.6	kJ/mol	74.5086 ± 0.0026	7747-84-4*0
Methylcyclopentane		-68.61	-106.13	± 0.36	kJ/mol	84.1595 ± 0.0049	96-37-7*0
Peroxyformic acid		-265.2	-273.1	± 1.4	kJ/mol	62.0248 ± 0.0012	107-32-4*3
Dioxosilane		-906.77	-911.75	± 0.63	kJ/mol	60.08430 ± 0.00067	7631-86-9*500
Dioxosilane		-826.32	-902.25	± 0.64	kJ/mol	60.08430 ± 0.00067	7631-86-9*520
Silicon carbide cation		1604.8	1609.4	± 2.4	kJ/mol	40.09565 ± 0.00085	78393-58-5*0
Tetrafluorosilane cation		-138.1	-142.4	± 9.4	kJ/mol	104.07856 ± 0.00030	62859-94-3*0
Peroxyimidogen cation		1409.7	1406.8	± 1.9	kJ/mol	46.00499 ± 0.00060	60488-32-60
Difluorosilyliumyl		416.0	415.3	± 2.0	kJ/mol	66.08176 ± 0.00030	37300-76-8*0
Peroxyimidogen anion		165.1	162.7	± 1.7	kJ/mol	46.00609 ± 0.00060	60488-31-5*0
Ethylene anion		232.0	224.4	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*1
Silyliumyl		1155.47	1153.85	± 0.93	kJ/mol	30.10083 ± 0.00033	28149-31-7*0
Disilanyl anion		63.3	50.9	± 2.1	kJ/mol	61.21125 ± 0.00069	53199-49-8*0
Disilene		393.4	384.9	± 2.2	kJ/mol	60.20276 ± 0.00066	15435-77-5*1
Nirous oxide cation		1329.69	1326.80	± 0.12	kJ/mol	44.01233 ± 0.00033	12269-46-4*0
Di-mu-hydrodihydrodisilicon		385.7	375.3	± 2.6	kJ/mol	60.20276 ± 0.00066	129970-82-7*22
Iodosilane		6.9	-2.8	± 2.6	kJ/mol	158.01379 ± 0.00037	13598-42-0*0
Trimethylsilanide		-42.0	-65.5	± 2.1	kJ/mol	73.1896 ± 0.0025	54711-92-1*0
Dihydrogen fluoride anion		-61.9	-60.5	± 3.2	kJ/mol	21.01483 ± 0.00014	117339-92-1*2
(3E)-1,3-Hexadien-5-yne		358.9	346.6	± 1.9	kJ/mol	78.1118 ± 0.0048	5222-77-5*0
Divinylacetylene		361.9	350.5	± 1.9	kJ/mol	78.1118 ± 0.0048	821-08-9*2
1,2,4-Cyclohexatriene		419.5	403.6	± 2.0	kJ/mol	78.1118 ± 0.0048	124869-33-6*0
Oxadiazirine anion		95.1	95.5	± 2.9	kJ/mol	44.01343 ± 0.00033	350586-31-1*0
Ethylammoniumyl		827.6	807.6	± 1.6	kJ/mol	45.0832 ± 0.0017	41857-50-5*0
2-Methyl-2-propanamine		-87.02	-120.68	± 0.55	kJ/mol	73.1369 ± 0.0033	75-64-9*0
Fluorosyl fluoride anion		-147.1	-146.8	± 3.0	kJ/mol	53.99675 ± 0.00030	86825-57-22
Benzophenone		80.7	51.4	± 1.5	kJ/mol	182.2179 ± 0.0104	119-61-9*0
Helium		1912.302	1912.302	± 0.000	kJ/mol	4.0026020 ± 0.0000020	7440-59-7*1
Helium cation		2372.322	2372.322	± 0.000	kJ/mol	4.0020534 ± 0.0000020	14234-48-1*0
Neonium		1324.85	1323.04	± 0.87	kJ/mol	21.18709 ± 0.00060	12200-65-6*0
Kryptonium		1106.29	1104.50	± 0.68	kJ/mol	84.8074 ± 0.1000	37276-90-7*0
Monosulfur cation		1276.42	1278.21	± 0.14	kJ/mol	32.0655 ± 0.0060	14701-12-3*0
Trichlorine cation		1056.6	1055.5	± 1.4	kJ/mol	106.3576 ± 0.0027	33088-85-6*2
Oxosulfur		999.26	999.87	± 0.13	kJ/mol	48.0649 ± 0.0060	767269-11-4*0
1-Chloro ozone anion		-109.0	-111.5	± 2.1	kJ/mol	83.4514 ± 0.0013	224299-15-4*3
Hydrogen oxide sulfide		51.1	45.1	± 1.4	kJ/mol	50.0813 ± 0.0060	155348-09-7*0
Trichloride		-328.5	-327.6	± 1.3	kJ/mol	106.3586 ± 0.0027	18434-33-8*0
Sulfuric acid			-887.18	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*825
Sulfuric acid			-899.22	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*846
Trioxodinitrate anion		-104.2	-107.5	± 1.9	kJ/mol	76.01223 ± 0.00091	194856-62-7*100
Hydrogen sulfite		-684.8	-692.1	± 1.8	kJ/mol	81.0727 ± 0.0061	15181-46-1*0
Dioxoperoxysulfane		-176.7	-177.7	± 2.1	kJ/mol	96.0636 ± 0.0061	103613-08-711
Dioxoperoxysulfane		-296.1	-296.1	± 2.0	kJ/mol	96.0636 ± 0.0061	103613-08-721
Dioxoperoxysulfate dianion		-209.1	-214.8	± 2.1	kJ/mol	96.0647 ± 0.0061	14808-79-81
Ethanethiol		-71.49	-73.10	± 0.37	kJ/mol	62.1350 ± 0.0062	75-08-1*500
Dimethylsulfoxide		-201.94	-203.59	± 0.49	kJ/mol	78.1344 ± 0.0062	67-68-5*500
Carbon monosulfide		278.90	282.14	± 0.68	kJ/mol	44.0767 ± 0.0061	2944-05-0*0
Platinum		563.4	564.3	± 1.7	kJ/mol	195.0780 ± 0.0020	7440-06-4*0
Chlorosyl chloride anion		-185.4	-184.7	± 2.3	kJ/mol	86.9053 ± 0.0018	86825-55-00
Diazenium		968.67	957.41	± 0.73	kJ/mol	31.03675 ± 0.00025	37369-93-0*0
Cyclohexene		27.17	-4.30	± 0.32	kJ/mol	82.1436 ± 0.0049	110-83-8*0
Cyclohexene		-21.98	-37.85	± 0.30	kJ/mol	82.1436 ± 0.0049	110-83-8*500
Triiodine cation		946.1	941.0	± 4.1	kJ/mol	380.712861 ± 0.000090	12596-32-6*0
1-Hydroxyethanide		-20.3	-33.7	± 2.2	kJ/mol	45.0610 ± 0.0017	88032-18-2*0
Methylimidogen anion		321.1	313.4	± 1.3	kJ/mol	29.04181 ± 0.00083	82539-34-2*0
Hydrogen fluoride			-321.82	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*901
(Methylmethylene)oxonium		686.0	671.7	± 2.2	kJ/mol	45.0600 ± 0.0017	23653-97-6*0
Methoxymethyl anion		23.4	10.4	± 2.3	kJ/mol	45.0610 ± 0.0017	61192-30-1*0
2-Chloro ozone anion		-103.6	-105.9	± 3.2	kJ/mol	83.4514 ± 0.0013	141801-67-40
Acetaldehyde anion		-62.1	-72.4	± 2.2	kJ/mol	44.0531 ± 0.0017	60427-04-5*0
Chlorine difluoride anion		-319.0	-319.0	± 2.2	kJ/mol	73.45005 ± 0.00090	91419-41-9*0
Methyleneaminylium		1456.7	1453.0	± 2.1	kJ/mol	28.03277 ± 0.00082	53518-13-1*1
Dibromine			-2.25	± 0.18	kJ/mol	159.8080 ± 0.0020	7726-95-6*800
Ketene cation		882.23	879.06	± 0.11	kJ/mol	42.0361 ± 0.0016	64999-16-2*0
Ketene anion		-16.0	-19.1	± 2.2	kJ/mol	42.0372 ± 0.0016	56391-79-8*0
Acetylene anion		380.1	380.3	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*2
Oxoethenylium		1139.7	1142.4	± 2.1	kJ/mol	41.0282 ± 0.0016	92056-63-8*0
1,3-Propanediyl		337.7	323.0	± 2.2	kJ/mol	42.0797 ± 0.0024	32458-33-6*21
Chloryl chloride		126.1	122.1	± 1.7	kJ/mol	102.9042 ± 0.0019	117489-73-3*0
Aminomethyliumylidene		1168.3	1165.1	± 2.2	kJ/mol	28.03277 ± 0.00082	86784-42-1*0
Oxiranylidene		456.1	452.1	± 2.2	kJ/mol	42.0367 ± 0.0016	50983-85-2*1
Oxiranylidene cation		1165.4	1161.9	± 2.5	kJ/mol	42.0361 ± 0.0016	50983-85-20
Oxiranylidene anion		236.3	232.4	± 2.3	kJ/mol	42.0372 ± 0.0016	50983-86-30
Methyl hydroperoxide cation		833.7	819.7	± 2.0	kJ/mol	48.0407 ± 0.0010	112465-88-0*0
Hydrogen difluoride cation		1174.3	1171.3	± 1.5	kJ/mol	39.004198 ± 0.000070	126950-54-72
Dihydroxymethylium		421.5	410.2	± 3.0	kJ/mol	47.0328 ± 0.0010	180071-68-5*1
Hydroxymethoxy cation		925.0	914.7	± 3.2	kJ/mol	47.0328 ± 0.0010	180071-69-6*13
Oxybismethanol		-534.1	-557.2	± 1.9	kJ/mol	78.0672 ± 0.0019	4407-89-0*11
Methoxyoxoniumylidene		1012.31	1003.48	± 0.67	kJ/mol	47.0328 ± 0.0010	86475-50-5*0
Carbon tetracation		14993.597	14998.744	± 0.049	kJ/mol	12.00851 ± 0.00080	16092-62-9*0
Ethylperoxy		-5.45	-21.56	± 0.88	kJ/mol	61.0599 ± 0.0017	3170-61-4*1
Ammonium radical		190.01	179.43	± 0.43	kJ/mol	18.03850 ± 0.00029	92075-50-8*0
Formic acid		-431.50	-424.67	± 0.20	kJ/mol	46.0254 ± 0.0010	64-18-6*500
Dichlorine			-16.473	± 0.090	kJ/mol	70.9054 ± 0.0018	7782-50-5*1000
Dioxirane anion		-173.0	-179.8	± 3.4	kJ/mol	46.0259 ± 0.0010	157-26-60
Dioxymethyl anion		54.9	49.7	± 1.4	kJ/mol	46.0259 ± 0.0010	93207-29-5*0
H-CO2 vdW complex		-178.3	-177.5	± 2.1	kJ/mol	45.0174 ± 0.0010	2564-83-2100
Hypochlorous acid cation		998.94	995.89	± 0.90	kJ/mol	52.45949 ± 0.00095	71606-47-8*0
2-Propanol		-305.34	-318.15	± 0.26	kJ/mol	60.0950 ± 0.0025	67-63-0*500
1-Propanol		-290.28	-302.46	± 0.19	kJ/mol	60.0950 ± 0.0025	71-23-8*500
Hydrogen chloride			-165.545	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*953
Trifluorine cation		1530.0	1527.9	± 2.2	kJ/mol	56.9946610 ± 0.0000015	64710-22-1*0
Oxazirinyl cation		1565.5	1566.2	± 2.3	kJ/mol	42.01629 ± 0.00086	228850-18-80
Oxazirinyl anion		448.2	449.0	± 2.4	kJ/mol	42.01739 ± 0.00086	28269-68-3*0
Hydrogen chloride			-165.555	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*825
Acetic acid		-484.03	-483.60	± 0.18	kJ/mol	60.0520 ± 0.0017	64-19-7*500
Acetic acid			-484.61	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*825
Acetic acid			-484.82	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*840
Fluoronium		774.04	771.10	± 0.91	kJ/mol	21.01373 ± 0.00014	12206-67-6*0
Hydrogen chloride			-165.945	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*907
Ethyl formate			-425.9	± 1.1	kJ/mol	74.0785 ± 0.0025	109-94-4*500
Carbon		711.381	716.866	± 0.039	kJ/mol	12.01070 ± 0.00080	7440-44-0*1
Hypochlorous acid anion		198.7	198.4	± 2.5	kJ/mol	52.46059 ± 0.00095	34524-94-2*0
Carbon		833.312	838.459	± 0.039	kJ/mol	12.01070 ± 0.00080	7440-44-0*2
Propionic acid		-415.4	-433.0	± 1.3	kJ/mol	74.0785 ± 0.0025	79-09-4*2
Imidogen anion		322.63	322.68	± 0.16	kJ/mol	15.015229 ± 0.000099	23841-33-0*0
Imidogen		358.75	358.79	± 0.16	kJ/mol	15.014680 ± 0.000099	13774-92-0*1
(1Z)-Ethanimine		58.9	44.2	± 1.4	kJ/mol	43.0678 ± 0.0016	56003-82-8*0
(E)-2-Iminoethylium		1108.3	1097.6	± 2.9	kJ/mol	42.0594 ± 0.0016	91127-33-2*22
2-Iminoethyl anion		104.5	93.5	± 2.1	kJ/mol	42.0604 ± 0.0016	73843-87-5*1
Isocyanomethylium		1272.6	1270.4	± 2.2	kJ/mol	40.0435 ± 0.0016	78269-43-9*0
Cyanogen cation		1598.23	1600.45	± 0.42	kJ/mol	52.0343 ± 0.0016	37354-81-7*0
Isocyanogen		412.1	414.4	± 1.3	kJ/mol	52.0349 ± 0.0016	83951-85-3*0
Diazoethenylidene		658.6	661.2	± 1.8	kJ/mol	52.0349 ± 0.0016	130760-10-0*0
Peroxychloric acid		76.6	68.4	± 2.5	kJ/mol	100.4582 ± 0.0015	177778-91-5*0
Isocyanomethyliumylidene		1615.7	1621.2	± 1.9	kJ/mol	38.0276 ± 0.0016	78271-45-1*0
Isocyanomethylidyne anion		479.2	482.9	± 2.0	kJ/mol	38.0287 ± 0.0016	53590-27-50
Cyanomethyliumylidene		1719.7	1725.3	± 2.1	kJ/mol	38.0276 ± 0.0016	76619-90-4*0
Cyanomethylidyne anion		410.0	413.7	± 2.2	kJ/mol	38.0287 ± 0.0016	12373-35-2*0
2,3-didehydro-1H-azirin-1-yl		720.3	724.3	± 2.1	kJ/mol	38.0281 ± 0.0016	439586-06-8*0
Diazirinyl		557.1	553.9	± 2.0	kJ/mol	41.03212 ± 0.00082	69967-71-1*2
Iminomethylimidogen anion		401.9	398.6	± 2.3	kJ/mol	41.03267 ± 0.00082	150296-30-3*2
1H-Diazirin-3-ylium		1527.2	1523.7	± 2.0	kJ/mol	41.03157 ± 0.00082	735234-64-7*2
1H-Diazirin-3-yl		917.7	914.3	± 1.9	kJ/mol	41.03212 ± 0.00082	324529-57-9*2
1H-diazirin-3-ide		379.8	376.6	± 2.0	kJ/mol	41.03267 ± 0.00082	735234-64-72
Methanediimine cation		1137.8	1133.1	± 2.2	kJ/mol	42.03951 ± 0.00082	1189338-16-6*2
Diazomethane cation		1141.92	1135.65	± 0.87	kJ/mol	42.03951 ± 0.00082	58852-13-4*0
3H-Diazirine cation		1327.5	1322.0	± 1.7	kJ/mol	42.03951 ± 0.00082	796039-16-2*0
1-Propenylidene		630.5	623.0	± 1.7	kJ/mol	40.0639 ± 0.0024	70277-78-0*2
1H-Diazirene cation		1333.3	1326.3	± 1.9	kJ/mol	42.03951 ± 0.00082	157-23-30
Isocyanamide cation		1321.4	1316.1	± 1.9	kJ/mol	42.03951 ± 0.00082	160951-17-7*0
3-Diaziridinylidene cation		1479.7	1473.7	± 2.4	kJ/mol	42.03951 ± 0.00082	85513-79-71
Trichloromethylium		856.12	854.60	± 0.93	kJ/mol	118.3683 ± 0.0028	27130-34-3*0
Dichloromethyliumyl		1121.9	1122.9	± 1.8	kJ/mol	82.9156 ± 0.0020	55945-51-2*0
Ammonium chloride		-311.555	-314.717	± 0.062	kJ/mol	53.49120 ± 0.00095	12125-02-9*510
Ammonium bromide		-253.27	-269.84	± 0.14	kJ/mol	97.9425 ± 0.0010	12124-97-9*510
Cyanogen bromide anion		57.9	54.3	± 3.8	kJ/mol	105.9220 ± 0.0013	54092-05-6*0
1,1,1-Trichloroethane		-183.85	-177.20	± 0.52	kJ/mol	133.4033 ± 0.0031	71-55-6*500
Aminooxy anion		47.3	40.4	± 1.7	kJ/mol	32.02257 ± 0.00034	51375-41-8*0
Hydrogen fluoride			-321.319	± 0.099	kJ/mol	20.006343 ± 0.000070	7664-39-3*809
Fluorosyl fluoride cation		1413.1	1413.4	± 3.5	kJ/mol	53.99566 ± 0.00030	86825-50-51
Vinyl chloride		-3.61	0.96	± 0.91	kJ/mol	62.4979 ± 0.0018	75-01-4*500
Chloromethane cation		1014.61	1007.84	± 0.17	kJ/mol	50.4867 ± 0.0012	12538-71-5*0
Chloroniumyl ion		1137.798	1137.732	± 0.0051	kJ/mol	36.46009 ± 0.00090	12258-94-5*0
Bromofluoromethane		-197.4	-211.9	± 4.9	kJ/mol	112.9290 ± 0.0013	373-52-4*0
Fluorodibromomethane		-159.7	-179.3	± 4.9	kJ/mol	191.8250 ± 0.0022	1868-53-7*0
Difluorochlorobromomethane		-428.9	-439.9	± 4.9	kJ/mol	165.3642 ± 0.0016	353-59-3*0
Dichlorofluorobromomethane		-228.3	-238.3	± 4.9	kJ/mol	181.8185 ± 0.0022	353-58-2*0
Dibromofluorochloromethane		-169.9	-186.8	± 4.9	kJ/mol	226.2698 ± 0.0023	353-55-9*0
Krypton cation		1350.756	1350.756	± 0.000	kJ/mol	83.7995 ± 0.1000	16915-28-9*0
1,2-Propadien-1-yl-3-ylidene anion		621.7	629.1	± 1.3	kJ/mol	36.0326 ± 0.0024	109292-47-9*0
Aminomethyl anion		209.5	199.2	± 2.1	kJ/mol	30.04975 ± 0.00085	74215-21-7*0
Methanol anion		-89.0	-99.7	± 2.8	kJ/mol	32.04241 ± 0.00090	68474-04-4*0
Tribromine		156.0	134.3	± 3.2	kJ/mol	239.7120 ± 0.0030	11094-39-6*0
Hypofluorous acid anion		155.3	154.7	± 2.6	kJ/mol	36.00629 ± 0.00031	36505-07-4*2
2-Cyclopropyn-1-ylidene		993.1	999.9	± 2.6	kJ/mol	36.0321 ± 0.0024	102508-15-6*2
Nitrate			-206.55	± 0.18	kJ/mol	62.00549 ± 0.00090	14797-55-8*800
1,2-Difluoroacetylene cation		1081.6	1084.4	± 1.3	kJ/mol	62.0177 ± 0.0016	268566-70-7*0
2-Propenylidyne anion		464.6	460.9	± 1.7	kJ/mol	39.0565 ± 0.0024	120126-89-8*0
Dinitrogen pentoxide			-41.15	± 0.38	kJ/mol	108.0105 ± 0.0015	10102-03-1*500
Difluorophosgene cation		653.44	650.68	± 0.51	kJ/mol	66.00636 ± 0.00085	73256-56-1*0
2-Propen-3-yliumylidene		1494.5	1491.5	± 1.7	kJ/mol	39.0554 ± 0.0024	84654-86-4*0
2-Propenylidene anion		535.9	532.6	± 1.7	kJ/mol	39.0565 ± 0.0024	98705-30-7*0
Chloro(chlorooxy)methylene		73.5	73.7	± 3.6	kJ/mol	98.9155 ± 0.0020	479587-31-0*2
Chlorohydroxymethylene		14.0	11.1	± 2.5	kJ/mol	64.4707 ± 0.0012	147723-60-2*1
(Chlorooxy)methylene		119.2	117.9	± 2.7	kJ/mol	64.4707 ± 0.0012	331419-80-8*2
Dibromophosgene			-143.98	± 0.95	kJ/mol	187.8181 ± 0.0022	593-95-3*590
Hydrooxonitrate		78.60	75.68	± 0.99	kJ/mol	31.01463 ± 0.00032	66057-02-1*0
2-Chloroethanol			-314.90	± 0.53	kJ/mol	80.5132 ± 0.0019	107-07-3*590
2-Bromoethanol			-274.37	± 0.46	kJ/mol	124.9645 ± 0.0019	540-51-2*590
Triazirinylium ion		1609.0	1606.1	± 1.6	kJ/mol	42.01967 ± 0.00021	92220-05-8*0
Hydroxyimidogen anion		229.8	227.4	± 2.2	kJ/mol	31.01463 ± 0.00032	35337-59-80
2-Cyclopropyn-1-yl anion		664.5	671.8	± 1.6	kJ/mol	36.0326 ± 0.0024	500574-36-7*0
Water			-285.806	± 0.022	kJ/mol	18.01528 ± 0.00033	7732-18-5*589
Phenylium		1149.28	1136.50	± 0.85	kJ/mol	77.1034 ± 0.0048	17333-73-2*2
Triazirine		464.2	457.7	± 2.6	kJ/mol	43.02816 ± 0.00022	157-29-9*0
m-Benzyne anion		444.5	435.6	± 1.3	kJ/mol	76.0965 ± 0.0048	249589-31-9*0
p-Benzyne anion		465.1	455.5	± 1.3	kJ/mol	76.0965 ± 0.0048	219298-17-6*0
Formaldehyde anion		-26.7	-28.3	± 2.0	kJ/mol	30.02653 ± 0.00087	27837-46-3*0
Cycloheptane		-126.57	-156.46	± 0.50	kJ/mol	98.1861 ± 0.0057	291-64-5*500
Ethylbenzene			-12.32	± 0.52	kJ/mol	106.1650 ± 0.0064	100-41-4*500
Phenylacetylene			273.84	± 0.70	kJ/mol	102.1332 ± 0.0064	536-74-3*500
Hypofluorous acid cation		1142.01	1139.00	± 0.87	kJ/mol	36.00519 ± 0.00031	90243-22-4*0
Indane		25.40	10.93	± 0.76	kJ/mol	118.1757 ± 0.0072	496-11-7*500
Indene cation		969.94	946.70	± 0.73	kJ/mol	116.1593 ± 0.0072	42949-13-3*0
Indene		117.22	109.93	± 0.85	kJ/mol	116.1598 ± 0.0072	95-13-6*500
Formaldehyde		196.009	192.707	± 0.094	kJ/mol	30.02598 ± 0.00087	50-00-0*1
Phenyloxoniumylidene		898.7	884.4	± 1.4	kJ/mol	93.1028 ± 0.0048	41071-17-4*0
Hydrogen chloride			-166.563	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*839
Fluorobenzene		-148.77	-146.36	± 0.39	kJ/mol	96.1023 ± 0.0048	462-06-6*500
3-Methanetetrayl-1,2-cyclopropanediylidene		1154.7	1164.1	± 1.9	kJ/mol	48.0428 ± 0.0032	78015-08-4*0
2-Cyclopropyn-1-ylidenemethyl anion		800.8	809.7	± 1.7	kJ/mol	48.0433 ± 0.0032	289679-90-9*0
Bromobenzene			60.3	± 1.3	kJ/mol	157.0079 ± 0.0049	108-86-1*500
Dioxodiazoxane		109.3	105.3	± 1.8	kJ/mol	76.01168 ± 0.00091	122413-35-8*2
Methylaminilium		1135.2	1125.4	± 2.1	kJ/mol	30.04865 ± 0.00085	49784-84-1*0
Propynylidene		543.70	546.70	± 0.58	kJ/mol	38.0480 ± 0.0024	67152-18-5*0
Pyridinium		761.7	740.8	± 1.3	kJ/mol	80.1073 ± 0.0040	16969-45-2*0
Acetone		-244.54	-247.66	± 0.26	kJ/mol	58.0791 ± 0.0025	67-64-1*500
Tetranitrogen cation		1392.8	1392.5	± 1.5	kJ/mol	56.02641 ± 0.00028	12185-04-5*0
2-Hydroxy-2-propenyl		4.0	-9.5	± 1.2	kJ/mol	57.0712 ± 0.0024	742072-56-6*0
Propionaldehyde		-217.92	-216.46	± 0.24	kJ/mol	58.0791 ± 0.0025	123-38-6*500
Ethyl nitrite		-81.16	-98.56	± 0.87	kJ/mol	75.0666 ± 0.0017	109-95-5*0
trans-1,2-Dibromoethene	$C(\Br)=C/Br$	121.8	102.0	± 2.0	kJ/mol	185.8453 ± 0.0026	590-12-5*0
1,1-Dibromoethene		125.7	105.3	± 2.1	kJ/mol	185.8453 ± 0.0026	593-92-0*0
Monoammonium succinate			-1067.87	± 0.72	kJ/mol	135.1186 ± 0.0035	38457-08-8*510
Diammonium succinate			-1182.38	± 0.47	kJ/mol	152.1492 ± 0.0035	2226-88-2*510
Acrolein		-46.3	-56.7	± 1.3	kJ/mol	56.0633 ± 0.0024	107-02-8*2
2H-Oxete		65.8	53.3	± 1.2	kJ/mol	56.0633 ± 0.0024	287-25-2*0
1-Formylethenylium		1023.5	1018.0	± 2.3	kJ/mol	55.0548 ± 0.0024	101705-89-9*2
3-Oxo-1-propenylium		1005.1	1002.8	± 2.4	kJ/mol	55.0548 ± 0.0024	101705-90-2*2
Hydroxyoxoammoniumyl		984.1	977.7	± 1.8	kJ/mol	47.01293 ± 0.00061	80371-48-8*0
Ethenedione cation		909.5	912.6	± 2.0	kJ/mol	56.0197 ± 0.0017	12541-99-0*0
1-Cyclopropene-1,2-diyl		791.2	790.7	± 1.5	kJ/mol	38.0480 ± 0.0024	202744-75-0*0
Hydrogen chloride			-166.604	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*954
Difluoronitrate		-70.7	-72.6	± 1.9	kJ/mol	52.004095 ± 0.000070	37366-64-6*0
Cyclopropenyliumdiyl		1692.3	1695.2	± 1.8	kJ/mol	37.0395 ± 0.0024	127476-05-5*0
Hydrogen chloride			-166.635	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*840
Cyclopropynyl anion		518.36	521.35	± 0.76	kJ/mol	37.0406 ± 0.0024	136861-42-2*0
Hydroperoxyimidogen		103.3	99.8	± 2.4	kJ/mol	47.01348 ± 0.00061	877456-58-1*1
3-Imino-2-propen-1-ylidene		533.0	527.9	± 1.8	kJ/mol	53.0627 ± 0.0024	916765-05-4*12
3-Imino-2-propen-1-ylidene		572.6	567.3	± 2.0	kJ/mol	53.0627 ± 0.0024	916765-05-4*22
2-(Methylidyneamino)ethenyl		604.5	599.7	± 1.9	kJ/mol	53.0627 ± 0.0024	123416-74-0*12
2-(Methylidyneamino)ethenyl		637.1	632.3	± 2.0	kJ/mol	53.0627 ± 0.0024	123416-74-0*22
Hydrogen fluoride			-321.97	± 0.10	kJ/mol	20.006343 ± 0.000070	7664-39-3*823
Ozone cation		1352.880	1350.541	± 0.041	kJ/mol	47.99765 ± 0.00090	12596-82-6*0
1-Cyanovinylium		1318.3	1317.1	± 2.2	kJ/mol	52.0542 ± 0.0024	85399-09-3*0
Methyliumylamino		1056.0	1049.2	± 1.7	kJ/mol	29.04071 ± 0.00083	65130-65-6*0
Ethanium		888.7	870.3	± 1.8	kJ/mol	31.0764 ± 0.0017	24669-33-8*2
Methylammoniumyl		865.98	852.05	± 0.25	kJ/mol	31.05659 ± 0.00088	34516-31-9*0
Tetraoxygen		145.8	142.2	± 3.8	kJ/mol	63.9976 ± 0.0012	12596-83-7*22
Butatriene cation		1210.6	1204.7	± 1.3	kJ/mol	52.0740 ± 0.0032	65513-85-1*0
Bicyclo[1.1.0]but-3-ene		483.2	474.2	± 1.6	kJ/mol	52.0746 ± 0.0032	78525-41-4*0
Ethanium		895.1	877.3	± 1.9	kJ/mol	31.0764 ± 0.0017	24669-33-8*3
Vinylvinylidene anion		405.7	399.0	± 2.0	kJ/mol	52.0751 ± 0.0032	167386-49-4*1
Trioxidanylium		1070.7	1064.5	± 1.4	kJ/mol	49.00559 ± 0.00090	74241-49-9*0
Tetrahedrane cation		1326.8	1318.6	± 1.7	kJ/mol	52.0740 ± 0.0032	80826-01-3*0
Bicyclo[1.1.0]but-1(3)-ene		578.8	570.4	± 1.9	kJ/mol	52.0746 ± 0.0032	58208-49-4*0
Bicyclo[1.1.0]but-1(3)-ene cation		1461.6	1453.5	± 2.1	kJ/mol	52.0740 ± 0.0032	58208-49-40
Hydrogen bromide			-120.01	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*834
Nitric acid cation		1029.17	1020.11	± 0.69	kJ/mol	63.01233 ± 0.00091	272109-63-4*0
1-Buten-3-yn-1-yl		547.9	545.1	± 1.2	kJ/mol	51.0666 ± 0.0032	2810-61-9*2
3-Buten-1-ynylium		1603.9	1602.9	± 1.7	kJ/mol	51.0661 ± 0.0032	103928-84-3*2
3-Methylene-1-cyclopropen-1-ylium		1467.7	1464.0	± 1.6	kJ/mol	51.0661 ± 0.0032	117469-28-0*1
2-Cyclopropen-1-ylidenemethylium		1346.5	1343.9	± 1.8	kJ/mol	51.0661 ± 0.0032	112936-36-4*2
1,3-Cyclobutadien-1-ylium		1388.3	1383.4	± 1.8	kJ/mol	51.0661 ± 0.0032	81913-77-1*2
Cyanic azide		502.8	498.3	± 1.9	kJ/mol	68.03766 ± 0.00085	764-05-6*0
Phenyl hydroperoxide		13.8	-5.2	± 2.1	kJ/mol	110.1106 ± 0.0049	36112-26-2*0
Fluoroaminyliumyl		1415.09	1415.63	± 0.85	kJ/mol	33.004595 ± 0.000070	33146-36-0*0
trans-1,3,5-Hexatriene		184.0	164.2	± 2.4	kJ/mol	80.1277 ± 0.0048	821-07-8*0
Methylcyclopentadienyl		239.0	221.4	± 2.1	kJ/mol	79.1198 ± 0.0048	72348-44-8*0
Methylcyclopentane		-116.56	-137.92	± 0.35	kJ/mol	84.1595 ± 0.0049	96-37-7*500
Dioxosilane		-904.07	-908.93	± 0.68	kJ/mol	60.08430 ± 0.00067	7631-86-9*510
Azanidylmethyl		224.4	217.1	± 2.2	kJ/mol	29.04181 ± 0.00083	127593-73-1*0
2-Butynylium		1258.7	1251.5	± 1.6	kJ/mol	53.0820 ± 0.0032	64235-83-2*1
Fluorosilylidyne		-60.32	-58.48	± 0.62	kJ/mol	47.08390 ± 0.00030	11128-24-8*0
Deuterium hydride cation		1490.498	1490.587	± 0.000	kJ/mol	3.021493 ± 0.000070	12181-16-7*0
Nitric acid			-186.82	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*801
Silylene anion		167.2	165.6	± 1.4	kJ/mol	30.10193 ± 0.00033	54991-62-7*0
Silyliumylidene		1136.49	1137.70	± 0.80	kJ/mol	29.09289 ± 0.00031	31241-66-4*0
1-Methylene-2-propenylium		1059.5	1049.3	± 1.7	kJ/mol	53.0820 ± 0.0032	62698-26-4*2
Disilene cation		1069.5	1060.4	± 2.0	kJ/mol	60.20221 ± 0.00066	108492-63-3*0
1-Methylene-2-propenylium		1256.4	1246.7	± 1.7	kJ/mol	53.0820 ± 0.0032	62698-26-4*1
Aminomethyliumyl		1039.5	1031.8	± 2.3	kJ/mol	29.04071 ± 0.00083	89302-94-3*0
Di-mu-hydrodihydrodisilicon cation		1180.3	1172.7	± 3.2	kJ/mol	60.20221 ± 0.00066	129970-82-71
Di-mu-hydrodihydrodisilicon anion		288.5	280.0	± 3.3	kJ/mol	60.20331 ± 0.00066	129970-83-81
mu-Hydrotrihydrodisilicon		459.2	450.9	± 2.5	kJ/mol	60.20276 ± 0.00066	497967-55-2*1
Ethylene anion		231.6	225.5	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*2
Nitric acid			-197.76	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*805
Vinylsilane		107.9	92.5	± 2.2	kJ/mol	58.1545 ± 0.0017	7291-09-0*0
Hydrogen bromide			-120.15	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*954
Chlorosyl chloride cation		1132.6	1130.8	± 2.0	kJ/mol	86.9043 ± 0.0018	86825-56-10
Nirous oxide anion		99.3	96.7	± 1.9	kJ/mol	44.01343 ± 0.00033	12274-12-3*0
1-Ethylium-1-yl		1182.0	1174.7	± 3.2	kJ/mol	28.0526 ± 0.0016	85944-79-2*0
Dewar benzene		422.2	405.1	± 1.7	kJ/mol	78.1118 ± 0.0048	5649-95-6*0
Ethylidene anion		325.7	318.4	± 1.8	kJ/mol	28.0537 ± 0.0016	35829-99-3*0
1,2-Hexadien-4-yne		407.5	397.5	± 1.7	kJ/mol	78.1118 ± 0.0048	34783-10-3*0
3-Methylene-1-penten-4-yne		362.7	350.0	± 2.2	kJ/mol	78.1118 ± 0.0048	6929-96-0*1
Bromine atom		117.925	111.863	± 0.055	kJ/mol	79.90400 ± 0.00100	10097-32-2*1
3-Methyl-1,4-pentadiyne		439.1	427.7	± 1.6	kJ/mol	78.1118 ± 0.0048	57242-04-3*0
1,3-Butadienylium		1133.7	1123.7	± 2.5	kJ/mol	53.0820 ± 0.0032	86181-69-3*2
Methylamine anion		84.2	69.4	± 2.8	kJ/mol	31.05769 ± 0.00088	81096-79-9*0
Ethylaminylium		1092.4	1076.4	± 2.4	kJ/mol	44.0752 ± 0.0017	54387-08-5*11
Hydrogen bromide			-120.31	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*844
Aminomethylene anion		353.0	346.1	± 2.3	kJ/mol	29.04181 ± 0.00083	207914-86-1*0
2-Methyl-2-propanamine		-133.13	-150.61	± 0.53	kJ/mol	73.1369 ± 0.0033	75-64-9*500
1,2-Diphenylethane		84.79	51.04	± 0.75	kJ/mol	182.2610 ± 0.0112	103-29-7*500
Hydrogen fluoride			-321.93	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*821
Anthracene		150.62	124.81	± 0.88	kJ/mol	178.2292 ± 0.0112	120-12-7*500
Phenanthrene		136.27	110.99	± 0.64	kJ/mol	178.2292 ± 0.0112	85-01-8*500
Diphenylacetylene		432.3	407.3	± 1.2	kJ/mol	178.2292 ± 0.0112	501-65-5*0
Diphenylacetylene		334.65	312.70	± 0.93	kJ/mol	178.2292 ± 0.0112	501-65-5*500
Benzophenone		-16.7	-42.0	± 1.5	kJ/mol	182.2179 ± 0.0104	119-61-9*500
Bicyclo[1.1.0]buta-1,1-diene-2,4-diyl		990.4	993.6	± 2.0	kJ/mol	49.0507 ± 0.0032	99417-53-50
Benzoic acid		-274.35	-294.14	± 0.19	kJ/mol	122.1213 ± 0.0056	65-85-0*0
Argonium		1151.8	1150.1	± 1.4	kJ/mol	40.9554 ± 0.0010	12254-68-1*0
Xenonium		1038.20	1036.42	± 0.88	kJ/mol	132.2974 ± 0.0200	37276-91-8*0
Chlorine difluoride cation		1346.3	1344.9	± 2.1	kJ/mol	73.44896 ± 0.00090	86825-59-4*0
Sulfur dioxide			-320.69	± 0.14	kJ/mol	64.0648 ± 0.0060	7446-09-5*1000
iso-Proplylide		128.8	110.4	± 1.5	kJ/mol	43.0882 ± 0.0024	25012-80-0*0
Sulfur oxide peroxide		-26.0	-30.2	± 2.3	kJ/mol	80.0642 ± 0.0061	175799-68-5*2
Propylene cation		975.18	961.65	± 0.18	kJ/mol	42.0792 ± 0.0024	34504-10-4*0
Trisulfide		-83.72	-84.65	± 0.71	kJ/mol	96.1985 ± 0.0180	12597-04-5*0
Fluorosyl fluoride anion		-56.6	-55.7	± 2.4	kJ/mol	53.99675 ± 0.00030	86825-57-21
Sulfuric acid			-887.70	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*893
Sulfuric acid			-885.87	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*820
Sulfuric acid			-886.66	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*822
Tribromide		-287.4	-308.5	± 1.9	kJ/mol	239.7125 ± 0.0030	14522-80-6*0
Sulfuric acid			-900.64	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*850
Sulfur tetraoxide		-163.6	-169.5	± 2.9	kJ/mol	96.0636 ± 0.0061	12772-98-4*22
Hydrogen carbonate			-689.868	± 0.039	kJ/mol	61.0174 ± 0.0012	71-52-3*800
Cyclopentene			7.37	± 0.48	kJ/mol	68.1170 ± 0.0040	142-29-0*590
Dioxoperoxysulfane		-295.8	-295.5	± 2.7	kJ/mol	96.0636 ± 0.0061	103613-08-722
Methanethiol		-46.76	-44.57	± 0.44	kJ/mol	48.1085 ± 0.0061	74-93-1*500
Hydroxydimethylsulfur		-19.7	-37.7	± 2.6	kJ/mol	79.1424 ± 0.0062	52670-37-8*0
Carbon disulfide		78.23	89.04	± 0.69	kJ/mol	76.1427 ± 0.0120	75-15-0*500
Hydrogen atom		-22.3	-24.0	± 1.5	kJ/mol	1.007940 ± 0.000070	12385-13-6*1000001
Nitrosyl nitrate		48.3	40.3	± 1.8	kJ/mol	92.0111 ± 0.0012	15969-55-8*1
Hydrogen atom		-17.0	-20.2	± 5.2	kJ/mol	1.007940 ± 0.000070	12385-13-6*1003001
Hydrogen atom		-14.1	-17.0	± 8.5	kJ/mol	1.007940 ± 0.000070	12385-13-6*1004001
Hydrogen atom		-30.3	-33.4	± 7.2	kJ/mol	1.007940 ± 0.000070	12385-13-6*1003004
Hydrogen atom		-28.3	-31.1	± 7.6	kJ/mol	1.007940 ± 0.000070	12385-13-6*1004004
Isopropylidene anion		282.5	268.4	± 2.0	kJ/mol	42.0803 ± 0.0024	121408-19-30
1,5-Hexadiene			54.54	± 0.31	kJ/mol	82.1436 ± 0.0049	592-42-7*500
Formyloxidanyl		-125.76	-127.13	± 0.55	kJ/mol	45.0174 ± 0.0010	16499-21-1*0
Dioxiranyl		217.3	213.8	± 2.0	kJ/mol	45.0174 ± 0.0010	120595-16-6*0
1-Propenylium		1231.8	1221.5	± 1.7	kJ/mol	41.0713 ± 0.0024	50457-58-4*2
Oxygen atom hexacation		42035.28	42037.14	± 0.12	kJ/mol	15.99611 ± 0.00030	14158-22-6*0
Diethyl ether		-265.29	-277.61	± 0.75	kJ/mol	74.1216 ± 0.0033	60-29-7*500
1-Propenylide		204.0	192.7	± 1.8	kJ/mol	41.0723 ± 0.0024	65887-20-9*2
1-Butanol		-312.84	-327.12	± 0.21	kJ/mol	74.1216 ± 0.0033	71-36-3*500
2-Methyl-2-propanol		-282.1	-312.2	± 1.9	kJ/mol	74.1216 ± 0.0033	75-65-0*0
Acetonitrile			40.62	± 0.22	kJ/mol	41.0520 ± 0.0016	75-05-8*500
Vinylcyclopentadienylium		1076.9	1059.5	± 3.7	kJ/mol	91.1299 ± 0.0056	146893-89-2*2
Glycolaldehyde		-292.1	-304.7	± 1.7	kJ/mol	60.0520 ± 0.0017	141-46-8*21
Glycolaldehyde		-290.5	-302.8	± 1.7	kJ/mol	60.0520 ± 0.0017	141-46-8*31
Glycolaldehyde		-283.8	-296.6	± 1.7	kJ/mol	60.0520 ± 0.0017	141-46-8*22
Hydrogen iodide			-56.825	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*800
Methyl acetate			-445.60	± 0.56	kJ/mol	74.0785 ± 0.0025	79-20-9*500
Dimethyl carbonate			-608.60	± 0.31	kJ/mol	90.0779 ± 0.0026	616-38-6*500
Iodine monochloride		-36.511	-35.537	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*510
Dihydrogen cation		1488.364	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*2
1-Hydroxy-2-propanone		-340.5	-360.3	± 1.7	kJ/mol	74.0785 ± 0.0025	116-09-6*21
1-Hydroxy-2-propanone		-338.0	-356.2	± 1.7	kJ/mol	74.0785 ± 0.0025	116-09-6*31
1-Hydroxy-2-propanone		-329.7	-349.6	± 1.7	kJ/mol	74.0785 ± 0.0025	116-09-6*22
Methoxyoxomethyl		-151.7	-160.7	± 1.5	kJ/mol	59.0440 ± 0.0017	16481-04-2*2
Ammonium hydroxide			-365.86	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*861
Difluorodioxidanium		1283.7	1279.2	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-01
Hydrochlorate ion		-25.2	-24.2	± 2.5	kJ/mol	36.46119 ± 0.00090	63099-75-2*0
Oxobromonium		1140.0	1132.2	± 1.6	kJ/mol	95.9029 ± 0.0010	142315-39-7*0
Trihydrogen		756.931	754.146	± 0.015	kJ/mol	3.02382 ± 0.00021	12184-91-7*2
Propionic acid		-505.38	-509.53	± 0.17	kJ/mol	74.0785 ± 0.0025	79-09-4*500
Ethylene glycol		-448.64	-455.16	± 0.37	kJ/mol	62.0678 ± 0.0018	107-21-1*500
Carbon dioxide anion		-340.6	-340.1	± 2.2	kJ/mol	44.01005 ± 0.00100	14485-07-5*0
Oxalic acid		-819.55	-829.64	± 0.42	kJ/mol	90.0349 ± 0.0020	144-62-7*500
Tetraoxidanyl		53.0	46.0	± 5.1	kJ/mol	65.0055 ± 0.0012	69696-93-1*2
Dimethylamine			-42.63	± 0.58	kJ/mol	45.0837 ± 0.0017	124-40-3*500
Hydronium radical		-18.5	-21.5	± 2.1	kJ/mol	19.02322 ± 0.00037	12168-76-2*100
Dioxidanyl dimer		-8.29	-17.86	± 0.50	kJ/mol	66.0135 ± 0.0012	240125-82-0*1
(E)-2-Iminoethylium		1148.7	1138.9	± 3.3	kJ/mol	42.0594 ± 0.0016	91127-33-2*12
1-Iminoethylium		833.7	823.2	± 3.0	kJ/mol	42.0594 ± 0.0016	128365-64-02
1-Iminoethanide		185.7	175.3	± 3.2	kJ/mol	42.0604 ± 0.0016	128365-65-12
1-Iminoethylium		1342.2	1333.3	± 3.9	kJ/mol	42.0594 ± 0.0016	128365-64-012
N-Methylenemethaniminium		904.3	893.4	± 3.1	kJ/mol	42.0594 ± 0.0016	88333-01-1*2
(Methylimino)methanide		223.0	212.2	± 3.2	kJ/mol	42.0604 ± 0.0016	64709-60-01
2-Aminoethenylium		1110.6	1099.5	± 2.4	kJ/mol	42.0594 ± 0.0016	64724-21-6*12
2-Aminoethenyl anion		230.2	219.3	± 2.6	kJ/mol	42.0604 ± 0.0016	64724-21-62
Aziridine			92.34	± 0.86	kJ/mol	43.0678 ± 0.0016	151-56-4*500
2-Aziridinylium		1010.9	998.9	± 3.3	kJ/mol	42.0594 ± 0.0016	91127-35-42
2-Aziridinide		316.2	304.1	± 3.4	kJ/mol	42.0604 ± 0.0016	111127-93-6*2
2-Aziridinyl		364.5	352.4	± 2.1	kJ/mol	42.0599 ± 0.0016	23838-09-72
2-Aziridinylium		1304.9	1293.2	± 4.1	kJ/mol	42.0594 ± 0.0016	91127-35-412
Trimethylamine			-48.32	± 0.89	kJ/mol	59.1103 ± 0.0025	75-50-3*500
Dioxiranylidene cation		1409.1	1410.3	± 2.6	kJ/mol	44.00895 ± 0.00100	138832-57-20
Hydrogen peroxide		-193.115	-187.297	± 0.076	kJ/mol	34.01468 ± 0.00062	7722-84-1*500
Cyanogen anion		281.5	284.7	± 2.2	kJ/mol	52.0354 ± 0.0016	11118-88-0*0
Diisocyanogen cation		1825.3	1828.1	± 3.2	kJ/mol	52.0343 ± 0.0016	78800-21-21
Isoprene			48.97	± 0.69	kJ/mol	68.1170 ± 0.0040	78-79-5*500
Cyanoaminyliumyl		1672.3	1673.7	± 2.6	kJ/mol	40.02363 ± 0.00081	316122-03-9*0
Cyanoamidogen anion		211.85	211.77	± 0.60	kJ/mol	40.02473 ± 0.00081	189879-95-6*0
Ethynylaminylium		1277.8	1277.4	± 2.6	kJ/mol	40.0435 ± 0.0016	103835-08-1*1
Nitrogen atom dianion		1062.8	1065.0	± 2.8	kJ/mol	14.007837 ± 0.000070	16727-21-2*0
Cyanoaminylium		1460.2	1458.0	± 1.9	kJ/mol	41.03157 ± 0.00082	205443-18-1*2
Diazomethanide		479.7	478.3	± 1.8	kJ/mol	41.03267 ± 0.00082	100840-43-5*1
1-Ethenylium-1-yl		1507.0	1507.1	± 2.1	kJ/mol	26.0367 ± 0.0016	80541-07-7*0
Dioxiranylidene anion		-110.2	-109.7	± 3.0	kJ/mol	44.01005 ± 0.00100	138832-58-30
Dioxymethylidyne cation		1436.6	1439.0	± 2.7	kJ/mol	44.00895 ± 0.00100	791121-04-52
Isocyanic fluoride		300.9	302.7	± 1.8	kJ/mol	45.01584 ± 0.00080	16992-26-0*0
Hydroxylamine			-97.1	± 2.2	kJ/mol	33.02996 ± 0.00037	7803-49-8*1000
Dioxohydrazine		172.91	171.14	± 0.14	kJ/mol	60.01228 ± 0.00062	16824-89-8*0
1H-Diazirin-3-ylium		1640.3	1638.0	± 2.0	kJ/mol	41.03157 ± 0.00082	735234-64-7*1
1H-diazirin-3-ide		655.2	652.0	± 2.1	kJ/mol	41.03267 ± 0.00082	735234-64-71
1H-Diazirin-3-yl		618.7	615.8	± 1.6	kJ/mol	41.03212 ± 0.00082	324529-57-9*0
Nitrosyl nitrite anion		-103.0	-106.2	± 2.8	kJ/mol	76.01223 ± 0.00091	122413-35-81
Cyanamide			59.04	± 0.52	kJ/mol	42.04006 ± 0.00082	420-04-2*500
Methoxymethylene		144.8	134.4	± 1.4	kJ/mol	44.0526 ± 0.0017	19527-10-7*22
Hydrazoic acid cation		1333.73	1328.06	± 0.82	kJ/mol	43.02761 ± 0.00022	58852-14-5*0
Dihydrogen cation		1489.060	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*1
Dioxymethylidyne cation		1388.2	1391.7	± 3.2	kJ/mol	44.00895 ± 0.00100	791121-04-5101
Methylenediazeniumide		375.2	368.7	± 1.9	kJ/mol	42.04006 ± 0.00082	24153-51-3*0
Methylidynehydrazinium-1-yl		1251.7	1245.8	± 1.9	kJ/mol	42.03951 ± 0.00082	160951-16-6*0
(Iminomethyl)imidogen		420.1	413.1	± 2.9	kJ/mol	42.04006 ± 0.00082	87570-07-8*11
Diazomethyliumyl		1639.6	1640.8	± 3.1	kJ/mol	40.02363 ± 0.00081	307495-90-5*0
Diazomethylene anion		406.9	407.1	± 2.4	kJ/mol	40.02473 ± 0.00081	205498-92-6*0
3H-Diazirin-3-ylidene		579.1	579.5	± 2.7	kJ/mol	40.02418 ± 0.00081	253308-70-2*0
(Z)-Diazene anion	$[H]/N=[N-]\[H]$	280.0	273.3	± 2.0	kJ/mol	30.02991 ± 0.00020	86631-37-00
Tetrafluorohydrazine		-13.4	-22.5	± 1.4	kJ/mol	104.00709 ± 0.00014	10036-47-2*0
Hydrogen fluoride			-321.85	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*903
Chloromethyliumylidene		1282.7	1285.8	± 2.4	kJ/mol	47.4629 ± 0.0012	69773-94-0*0
Chloromethylidyne anion		319.8	323.6	± 2.5	kJ/mol	47.4639 ± 0.0012	117129-77-8*0
1,3-Propanediyl		320.3	308.4	± 1.5	kJ/mol	42.0797 ± 0.0024	32458-33-6*12
Isocyanogen chloride		314.7	316.3	± 2.4	kJ/mol	61.4701 ± 0.0012	75754-69-7*0
Dihydrogen fluoride		-56.5	-54.2	± 1.7	kJ/mol	21.01428 ± 0.00014	12592-22-2*2
Isocyanogen bromide		341.2	335.5	± 3.5	kJ/mol	105.9214 ± 0.0013	65997-98-0*0
Carbon dioxide cation		1335.0	1335.5	± 2.4	kJ/mol	44.00895 ± 0.00100	12181-61-2*1
Carbon monoxide anion		30.0	33.7	± 2.3	kJ/mol	28.01065 ± 0.00085	12539-63-8*0
Carbon monoxide		465.588	469.295	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*1
Poly(vinylchloride)		-84.6	-94.0	± 1.3	kJ/mol	62.4979 ± 0.0018	9002-86-2*500
1,1-Dichloroethene			-23.45	± 0.51	kJ/mol	96.9427 ± 0.0024	75-35-4*500
1-Propynylium		1547.0	1545.1	± 3.1	kJ/mol	39.0554 ± 0.0024	24858-94-4*0
Dioxygen difluoride		75.1	71.6	± 3.6	kJ/mol	69.99561 ± 0.00060	183051-89-0*0
Isocyanogen iodide		341.7	341.9	± 4.9	kJ/mol	152.92191 ± 0.00080	66004-32-8*0
Dichloromethane			-122.72	± 0.37	kJ/mol	84.9320 ± 0.0020	75-09-2*590
Isocyanogen iodide anion		123.0	125.2	± 9.3	kJ/mol	152.92246 ± 0.00080	66004-32-80
Ethynylene		827.185	833.890	± 0.082	kJ/mol	24.0214 ± 0.0016	12070-15-4*1
2-Hydroxyethenyl		143.83	137.27	± 0.99	kJ/mol	43.0446 ± 0.0016	108665-16-3*11
1,2-Propadien-1-ylium-1-yl-3-ylidene		1957.15	1965.02	± 0.82	kJ/mol	36.0316 ± 0.0024	118090-85-0*1
2-Hydroxyethenyl		147.1	140.9	± 1.2	kJ/mol	43.0446 ± 0.0016	108665-16-3*22
2-Hydroxyethenyl		150.6	144.5	± 1.6	kJ/mol	43.0446 ± 0.0016	108665-16-3*12
Dihydrogen		1.417	0.019	± 0.000	kJ/mol	2.01588 ± 0.00014	1333-74-0*1
Tribromofluoromethane		-98.0	-122.0	± 1.4	kJ/mol	270.7211 ± 0.0031	353-54-8*0
Tribromochloromethane		86.7	63.8	± 1.4	kJ/mol	287.1754 ± 0.0032	594-15-0*0
Trioxirane		272.5	269.9	± 1.3	kJ/mol	47.99820 ± 0.00090	153851-84-4*0
Chlorine hydride oxide		163.9	154.0	± 2.4	kJ/mol	84.4588 ± 0.0013	1027055-52-2*0
Difluoromethylene anion		-211.17	-209.99	± 0.58	kJ/mol	50.00805 ± 0.00080	66212-40-6*0
Fluoromethylidyne anion		200.8	204.3	± 1.9	kJ/mol	31.00965 ± 0.00080	33412-12-3*0
Cycloprop-1-enylium		1502.2	1498.0	± 2.1	kJ/mol	39.0554 ± 0.0024	117067-78-4*0
Hydrazoic acid anion		309.1	302.8	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*1
Cycloprop-2-enylide		514.8	511.9	± 2.2	kJ/mol	39.0565 ± 0.0024	20829-57-6*0
Difluorovinylidene		129.4	130.6	± 2.2	kJ/mol	62.0182 ± 0.0016	41895-33-4*0
Fluoroethynylium		1536.5	1541.2	± 2.3	kJ/mol	43.0193 ± 0.0016	268566-69-4*0
Bromoacetylene		282.0	275.5	± 1.6	kJ/mol	104.9333 ± 0.0019	593-61-3*0
Methanol dimer		-398.2	-418.9	± 1.4	kJ/mol	64.0837 ± 0.0018	42845-44-3*0
Chloro(chlorooxy)methylene		98.	101.	± 15.	kJ/mol	98.9155 ± 0.0020	479587-31-0*11
Chlorooxomethylium		783.7	783.9	± 2.2	kJ/mol	63.4623 ± 0.0012	38264-03-8*0
Methylamine			-45.18	± 0.44	kJ/mol	31.05714 ± 0.00088	74-89-5*500
Peroxyhypochlorous acid cation		1030.4	1024.5	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-21
2-Iodoethanol			-207.2	± 2.4	kJ/mol	171.9650 ± 0.0017	624-76-0*590
1,3-Butadiyne cation		1440.21	1442.07	± 0.55	kJ/mol	50.0581 ± 0.0032	55468-55-8*0
1,3,5-Hexatriynide		635.6	644.0	± 2.3	kJ/mol	73.0727 ± 0.0048	85905-65-3*0
Carbon suboxide cation		928.8	932.3	± 1.1	kJ/mol	68.0304 ± 0.0025	151528-67-5*0
Carbon suboxide anion		-131.2	-127.7	± 2.5	kJ/mol	68.0314 ± 0.0025	109362-94-9*0
Benzene anion		209.1	197.2	± 1.2	kJ/mol	78.1124 ± 0.0048	34562-85-1*0
Tetrafluorohydrazine cation		1129.2	1122.5	± 2.5	kJ/mol	104.00654 ± 0.00014	37366-75-9*1
o-Benzyne		625.7	616.4	± 1.1	kJ/mol	76.0960 ± 0.0048	462-80-6*1
m-Benzyne		527.4	518.9	± 1.2	kJ/mol	76.0960 ± 0.0048	1828-89-3*0
Hydroxyoxoammoniumyl		984.1	977.7	± 1.8	kJ/mol	47.01293 ± 0.00061	80371-48-8*1
Peroxynitrous acid		-5.74	-11.57	± 0.35	kJ/mol	63.01288 ± 0.00091	14691-52-2*0
p-Benzyne cation		1423.6	1416.3	± 2.0	kJ/mol	76.0954 ± 0.0048	121058-09-1*0
p-Benzyne		587.0	577.6	± 1.2	kJ/mol	76.0960 ± 0.0048	3355-34-8*0
Deuterium hydride		0.328	0.319	± 0.000	kJ/mol	3.022042 ± 0.000070	13983-20-5*0
Toluene		19.78	12.03	± 0.31	kJ/mol	92.1384 ± 0.0056	108-88-3*500
Bicyclo[1.1.0]buta-1,3-dien-4-ylium-2-yl		2087.6	2097.4	± 2.3	kJ/mol	48.0423 ± 0.0032	289679-91-0*0
Cyclopropenylidene anion		544.2	543.8	± 2.2	kJ/mol	38.0485 ± 0.0024	16165-40-50
Triiodine		153.4	149.4	± 3.6	kJ/mol	380.713410 ± 0.000090	12596-31-5*0
Bicyclo[1.1.0]buta-1,3-dien-2-yl anion		803.0	810.7	± 1.8	kJ/mol	48.0433 ± 0.0032	289679-89-6*0
Cyclopentadienylium		1088.68	1075.82	± 0.80	kJ/mol	65.0927 ± 0.0040	29661-18-5*0
Cycloheptene		-25.1	-46.2	± 1.7	kJ/mol	96.1702 ± 0.0057	628-92-2*500
Cycloheptatriene		154.44	145.65	± 0.92	kJ/mol	92.1384 ± 0.0056	544-25-2*500
Peroxyhypochlorous acid anion		-32.2	-33.9	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-32
Phenylethene			104.47	± 0.47	kJ/mol	104.1491 ± 0.0064	100-42-5*500
Tetrazete		764.9	759.0	± 1.8	kJ/mol	56.02696 ± 0.00028	42851-09-2*0
Benzonitrile		161.17	163.53	± 0.90	kJ/mol	103.1213 ± 0.0056	100-47-0*500
Isocyanobenzene		320.9	307.1	± 1.7	kJ/mol	103.1213 ± 0.0056	931-54-4*0
Isoindene		269.8	246.5	± 1.9	kJ/mol	116.1598 ± 0.0072	270-53-1*0
Phenol		-146.16	-162.01	± 0.64	kJ/mol	94.1112 ± 0.0048	108-95-2*500
Ammonium hydroxide			-363.82	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*801
Anisole			-117.54	± 0.61	kJ/mol	108.1378 ± 0.0056	100-66-3*500
Benzaldehyde		-85.61	-86.68	± 0.90	kJ/mol	106.1219 ± 0.0056	100-52-7*500
Paraformaldehyde			-176.4	± 1.5	kJ/mol	30.02598 ± 0.00087	30525-89-4*500
Ammonium hydroxide			-364.67	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*803
1,3-Butadiynyl anion		677.2	686.3	± 1.1	kJ/mol	48.0433 ± 0.0032	59158-53-1*0
Acetophenone			-139.3	± 1.1	kJ/mol	120.1485 ± 0.0064	98-86-2*500
1-Phenylethenol		-8.7	-32.5	± 2.0	kJ/mol	120.1485 ± 0.0064	4383-15-7*0
p-Tolualdehyde			-125.8	± 1.3	kJ/mol	120.1485 ± 0.0064	104-87-0*500
Tetraazatetrahedrane		763.7	757.3	± 1.7	kJ/mol	56.02696 ± 0.00028	12596-63-3*0
Chloryl ion		1100.26	1097.60	± 0.53	kJ/mol	67.4510 ± 0.0011	25052-55-5*0
o-Tolualdehyde			-118.9	± 1.1	kJ/mol	120.1485 ± 0.0064	529-20-4*500
Fluorobenzene anion		-15.3	-27.1	± 1.6	kJ/mol	96.1029 ± 0.0048	34561-55-2*0
Hexafluorobenzene anion		-992.7	-995.0	± 3.5	kJ/mol	186.0552 ± 0.0048	37551-90-9*0
Trifluorine		80.9	82.1	± 2.5	kJ/mol	56.9952096 ± 0.0000015	73455-86-4*0
2-Cyclopropyn-1-ylidenemethyliumyl		2239.7	2247.6	± 2.3	kJ/mol	48.0423 ± 0.0032	289679-92-1*0
m-Chlorophenylium		1161.7	1151.6	± 2.6	kJ/mol	111.5481 ± 0.0049	127983-85-1*0
p-Chlorophenylium		1149.0	1139.5	± 2.5	kJ/mol	111.5481 ± 0.0049	42766-43-8*0
o-Chlorophenylium		1168.3	1159.0	± 2.5	kJ/mol	111.5481 ± 0.0049	137963-70-3*0
Propane cation		974.7	954.6	± 1.7	kJ/mol	44.0951 ± 0.0025	34479-70-4*0
Iodobenzene cation		1023.59	1008.15	± 0.99	kJ/mol	204.0078 ± 0.0048	38406-85-8*0
Ammonium hydroxide			-365.13	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*805
Nitrobenzene			7.3	± 1.3	kJ/mol	123.1094 ± 0.0049	98-95-3*500
Furan		-62.56	-61.95	± 0.60	kJ/mol	68.0740 ± 0.0032	110-00-9*500
Ammonia anion		94.3	87.3	± 2.4	kJ/mol	17.03111 ± 0.00022	37353-00-7*0
Pyridine		102.22	100.19	± 0.38	kJ/mol	79.0999 ± 0.0040	110-86-1*500
1-Methyl-1-ethylium-1-yl		1058.3	1045.7	± 1.9	kJ/mol	42.0792 ± 0.0024	121408-19-3*0
Ammonium hydroxide			-366.31	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*844
Nitrous acid anion		-105.84	-110.46	± 0.78	kJ/mol	47.01403 ± 0.00061	256393-36-9*2
Nitromethane		-114.10	-112.92	± 0.40	kJ/mol	61.0401 ± 0.0010	75-52-5*500
Ammonium hydroxide			-365.43	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*807
Isodiazene anion		380.9	374.1	± 2.1	kJ/mol	30.02991 ± 0.00020	63986-30-10
2-Oxo-1-ethylium-1-yl		1289.4	1286.0	± 2.5	kJ/mol	42.0361 ± 0.0016	214464-96-7*11
2,2,4-Trimethylpentane		-224.3	-258.7	± 1.5	kJ/mol	114.2285 ± 0.0065	540-84-1*500
cis-1,2-Diiodoethene	$C(\I)=C\I$	217.44	209.16	± 0.35	kJ/mol	279.8462 ± 0.0016	590-26-1*0
trans-1,2-Diiodoethene	$C(\I)=C/I$	215.10	207.70	± 0.35	kJ/mol	279.8462 ± 0.0016	590-27-2*0
Norbornadiene			206.2	± 1.6	kJ/mol	92.1384 ± 0.0056	121-46-0*500
2,3-Butanedione			-365.58	± 0.53	kJ/mol	86.0892 ± 0.0033	431-03-8*500
Succinic acid		-801.3	-823.4	± 2.7	kJ/mol	118.0880 ± 0.0034	110-15-6*0
Oxoethylidene anion		86.9	83.6	± 2.1	kJ/mol	42.0372 ± 0.0016	106543-38-8*1
Trifluoronitrate		-246.7	-248.9	± 2.5	kJ/mol	71.002498 ± 0.000070	37366-69-1*0
1,2-Diiodoethane		87.84	73.17	± 0.90	kJ/mol	281.8621 ± 0.0016	624-73-7*0
1,2-Diiodoethane			9.30	± 0.60	kJ/mol	281.8621 ± 0.0016	624-73-7*500
2-Butanone		-267.73	-273.22	± 0.79	kJ/mol	72.1057 ± 0.0033	78-93-3*500
Acrolein cation		920.00	909.86	± 0.79	kJ/mol	56.0627 ± 0.0024	84005-05-0*1
Acrolein anion		-71.8	-81.9	± 3.1	kJ/mol	56.0638 ± 0.0024	23555-87-5*2
Acrolein			-95.59	± 0.96	kJ/mol	56.0633 ± 0.0024	107-02-8*500
1-Oxo-2-propenylium		772.8	765.9	± 3.0	kJ/mol	55.0548 ± 0.0024	35335-83-2*2
1-Oxo-2-propenide		50.7	46.0	± 2.6	kJ/mol	55.0559 ± 0.0024	78944-75-9*1
Hydrogen fluoride			-321.95	± 0.10	kJ/mol	20.006343 ± 0.000070	7664-39-3*822
3-Oxo-1-propenylium		1197.7	1192.0	± 3.4	kJ/mol	55.0548 ± 0.0024	101705-90-2*121
Ethenedione anion		-149.7	-147.1	± 1.7	kJ/mol	56.0207 ± 0.0017	77783-15-4*0
Bromoniumyl		1098.16	1090.31	± 0.12	kJ/mol	80.9114 ± 0.0010	12258-64-9*0
Urea		-317.74	-333.34	± 0.12	kJ/mol	60.05534 ± 0.00091	57-13-6*500
Peroxyhypochlorite		-252.78	-251.75	± 0.34	kJ/mol	67.4520 ± 0.0011	224299-14-3*0
2-Propen-3-ylium-1-ylidyne		1791.2	1792.8	± 2.6	kJ/mol	38.0474 ± 0.0024	161054-36-0*0
Bromosyl bromide		180.4	164.6	± 2.1	kJ/mol	175.8074 ± 0.0020	68322-97-4*0
2,4,5-Trioxa-1,3-diazabicyclo[1.1.1]pentane		602.5	593.3	± 2.1	kJ/mol	76.01168 ± 0.00091	224950-18-9*0
Propenediylidene anion		588.8	590.0	± 2.3	kJ/mol	38.0485 ± 0.0024	161054-36-00
Formamide			-251.05	± 0.28	kJ/mol	45.04066 ± 0.00088	75-12-7*500
Chlorodioxidanyl		100.36	99.27	± 0.34	kJ/mol	67.4515 ± 0.0011	17376-09-9*0
Acetamide			-315.89	± 0.53	kJ/mol	59.0672 ± 0.0017	60-35-5*500
Carbon dication		4150.451	4155.597	± 0.039	kJ/mol	12.00960 ± 0.00080	16092-61-8*0
Chlorine chlorite		177.4	175.1	± 2.2	kJ/mol	102.9042 ± 0.0019	105206-44-8*2
Oxygen difluoride cation		1292.10	1289.58	± 0.66	kJ/mol	53.99566 ± 0.00030	39432-25-2*0
Acrylonitrile		446.5	441.0	± 1.7	kJ/mol	53.0627 ± 0.0024	107-13-1*2
Acrylonitrile		146.51	154.17	± 0.73	kJ/mol	53.0627 ± 0.0024	107-13-1*500
Isocyanoethene		544.2	539.3	± 1.8	kJ/mol	53.0627 ± 0.0024	14668-82-7*2
1-Isocyanoethylidene		527.9	523.2	± 1.1	kJ/mol	53.0627 ± 0.0024	498544-34-60
Nitric acid trihydrate		-1062.02	-1055.17	± 0.20	kJ/mol	117.0587 ± 0.0019	13444-83-2*500
Hydraziniumyl		886.7	873.3	± 2.0	kJ/mol	32.04469 ± 0.00031	20771-51-1*0
Azide			272.69	± 0.47	kJ/mol	42.02077 ± 0.00021	14343-69-2*800
Hydrogen difluoride cation		1241.	1238.	± 17.	kJ/mol	39.004198 ± 0.000070	126950-54-7*1
Tetraoxygen		104.4	102.4	± 3.5	kJ/mol	63.9976 ± 0.0012	12596-83-7*11
n-Heptane		-201.49	-223.95	± 0.44	kJ/mol	100.2019 ± 0.0057	142-82-5*500
Trioxidanyl		25.36	23.27	± 0.13	kJ/mol	49.00614 ± 0.00090	12500-78-6*0
Vinylacetylene			266.5	± 2.1	kJ/mol	52.0746 ± 0.0032	689-97-4*500
Dioxohydrazine		172.91	171.14	± 0.14	kJ/mol	60.01228 ± 0.00062	16824-89-8*2
Hydroxymethoxy		-159.58	-169.43	± 0.84	kJ/mol	47.0333 ± 0.0010	72144-78-6*0
Ammonium hydroxide			-366.00	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*815
Vinylvinylidene		690.5	684.4	± 2.6	kJ/mol	52.0746 ± 0.0032	148759-16-4*11
Oxygen difluoride anion		-202.1	-201.9	± 2.7	kJ/mol	53.99675 ± 0.00030	7783-41-70
n-Octane		-226.32	-249.44	± 0.52	kJ/mol	114.2285 ± 0.0065	111-65-9*500
Hydroxymethyleneoxonium		792.93	782.79	± 0.63	kJ/mol	47.0328 ± 0.0010	77144-12-8*0
1-Buten-3-ynylium		1483.2	1480.6	± 1.6	kJ/mol	51.0661 ± 0.0032	84654-85-3*2
Tetraoxodinitrogen cation		1030.6	1025.2	± 2.6	kJ/mol	92.0105 ± 0.0012	64476-91-1*0
Ethyl hydroperoxide			-209.	± 20.	kJ/mol	62.0678 ± 0.0018	3031-74-1*500
2-Cyclopropen-1-ylidenemethylium		1433.2	1429.4	± 1.9	kJ/mol	51.0661 ± 0.0032	112936-36-4*1
1,3-Cyclobutadien-1-ylium		1473.1	1468.5	± 1.9	kJ/mol	51.0661 ± 0.0032	81913-77-1*1
1,3-Cyclobutadien-1-yl anion		616.4	611.9	± 2.1	kJ/mol	51.0672 ± 0.0032	154675-37-3*0
Dihydrogen		-0.000	-0.058	± 0.000	kJ/mol	2.01588 ± 0.00014	1333-74-0*2
Cyclobutenylium		1038.7	1025.6	± 2.8	kJ/mol	53.0820 ± 0.0032	12316-90-4*0
Cyclobutane			3.88	± 0.38	kJ/mol	56.1063 ± 0.0032	287-23-0*590
Butyraldehyde		-235.81	-239.34	± 0.84	kJ/mol	72.1057 ± 0.0033	123-72-8*500
Methylcyclopropane			1.92	± 0.59	kJ/mol	56.1063 ± 0.0032	594-11-6*590
n-Nonane		-247.66	-274.52	± 0.47	kJ/mol	128.2551 ± 0.0073	111-84-2*500
Trifluoroammoniumyl		1093.4	1087.3	± 2.3	kJ/mol	71.001401 ± 0.000070	54384-83-7*0
Disilicon cation		1352.3	1355.9	± 2.4	kJ/mol	56.17045 ± 0.00060	12597-36-3*0
Dioxosilane cation		946.3	946.2	± 2.8	kJ/mol	60.08375 ± 0.00067	59458-81-0*0
Silicate		-477.5	-478.3	± 2.6	kJ/mol	60.08485 ± 0.00067	53095-83-3*0
Oxosilicate		-106.0	-104.8	± 2.6	kJ/mol	44.08545 ± 0.00042	12503-59-2*0
Silicon carbide		-71.9	-72.9	± 1.4	kJ/mol	40.09620 ± 0.00085	409-21-2*502
Ammonium hydroxide			-366.20	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*818
Fluorosilylidyne anion		-139.0	-137.7	± 1.8	kJ/mol	47.08445 ± 0.00030	11080-58-3*0
Silane cation		1104.7	1097.5	± 1.6	kJ/mol	32.11671 ± 0.00041	34826-51-2*0
Hydrogen chloride			-166.712	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*951
Silylium		989.66	984.08	± 0.89	kJ/mol	31.10877 ± 0.00037	41753-67-7*0
Silylidyne anion		250.0	251.2	± 1.1	kJ/mol	29.09399 ± 0.00031	68865-96-3*0
Disilanylium		981.5	970.2	± 2.5	kJ/mol	61.21015 ± 0.00069	86860-82-4*0
1-Disilanylium-1-yl		1124.1	1116.5	± 2.2	kJ/mol	60.20221 ± 0.00066	108492-64-4*0
Di-mu-hydrodihydrodisilicon cation		1194.4	1184.8	± 3.4	kJ/mol	60.20221 ± 0.00066	129970-82-72
Di-mu-hydrodihydrodisilicon anion		296.7	289.2	± 3.5	kJ/mol	60.20331 ± 0.00066	129970-83-82
Ammonium hydroxide			-366.33	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*822
1,2-Butadienylium		1315.5	1307.5	± 1.7	kJ/mol	53.0820 ± 0.0032	65114-67-21
Nitric acid monohydrate		-479.12	-472.63	± 0.18	kJ/mol	81.0282 ± 0.0012	13444-82-1*500
2,4-Hexadiyne		319.16	312.80	± 0.95	kJ/mol	78.1118 ± 0.0048	2809-69-0*500
Trichlorine		125.3	125.8	± 2.0	kJ/mol	106.3581 ± 0.0027	11094-65-8*0
Trimethylenecyclopropane		454.2	441.4	± 1.8	kJ/mol	78.1118 ± 0.0048	3227-90-5*0
3,4-Bis(methylene)cyclobutene		355.6	341.0	± 1.8	kJ/mol	78.1118 ± 0.0048	5291-90-7*0
Hydrazine		57.30	50.73	± 0.18	kJ/mol	32.04524 ± 0.00031	302-01-2*500
Ammonium hydroxide			-366.37	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*828
Hydrogen difluoride cation		1267.6	1265.4	± 4.1	kJ/mol	39.004198 ± 0.000070	126950-54-71
1-Ethynylcyclobutene		402.3	388.0	± 1.8	kJ/mol	78.1118 ± 0.0048	813466-25-0*0
3-Methyl-1,2-pentadien-4-yne		414.7	403.5	± 2.2	kJ/mol	78.1118 ± 0.0048	813466-14-7*0
Perchloryl cation		1252.1	1246.4	± 2.5	kJ/mol	83.4504 ± 0.0013	23594-88-9*0
Oxadiazirine cation		1509.9	1507.2	± 2.4	kJ/mol	44.01233 ± 0.00033	227934-45-40
1-Ethynyl-2-propyn-1-ylidene		787.5	792.5	± 2.1	kJ/mol	62.0694 ± 0.0040	882068-94-2*21
1-Ethynyl-2-propyn-1-ylidene		796.1	801.0	± 2.6	kJ/mol	62.0694 ± 0.0040	882068-94-2*22
1,3-Pentadiyne-1.5-diyl		783.8	787.3	± 2.1	kJ/mol	62.0694 ± 0.0040	117992-81-1*0
1,3-Pentadiyne			385.1	± 5.0	kJ/mol	64.0853 ± 0.0040	4911-55-1*500
Penta-1,4-diyn-3-ide		443.9	443.2	± 3.2	kJ/mol	63.0779 ± 0.0040	553662-77-4*1
1,3-Butadienylium		1255.9	1246.5	± 2.3	kJ/mol	53.0820 ± 0.0032	86181-69-3*1
1-Aminoethylium		683.3	664.7	± 2.3	kJ/mol	44.0752 ± 0.0017	30208-36-70
Ammonium hydroxide			-366.39	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*833
1-Propanamine		-93.79	-101.39	± 0.40	kJ/mol	59.1103 ± 0.0025	107-10-8*500
n-Decane		-272.91	-300.46	± 0.75	kJ/mol	142.2817 ± 0.0081	124-18-5*500
2-Propanamine		-101.55	-112.16	± 0.52	kJ/mol	59.1103 ± 0.0025	75-31-0*500
NON cation		1444.0	1444.2	± 2.8	kJ/mol	44.01233 ± 0.00033	227934-46-50
Formic acid			-425.47	± 0.45	kJ/mol	46.0254 ± 0.0010	64-18-6*800
Naphthalene		94.71	75.12	± 0.55	kJ/mol	128.1705 ± 0.0080	91-20-3*500
NON anion		495.3	492.8	± 2.5	kJ/mol	44.01343 ± 0.00033	227934-47-60
Biphenyl		121.6	97.1	± 1.1	kJ/mol	154.2078 ± 0.0096	92-52-4*500
Biphenyl		121.6	97.1	± 1.1	kJ/mol	154.2078 ± 0.0096	92-52-4*520
Hydrogen fluoride			-321.96	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*905
Aniline		37.27	31.02	± 0.63	kJ/mol	93.1265 ± 0.0048	62-53-3*500
Dihelium		1733.310	1729.576	± 0.018	kJ/mol	8.0052040 ± 0.0000040	12184-98-4*1
Dihydrohelium cation		1467.27	1461.99	± 0.44	kJ/mol	6.01793 ± 0.00014	12500-88-8*0
Neon cation		2080.662	2080.769	± 0.000	kJ/mol	20.17915 ± 0.00060	14782-23-1*0
Pyruvic acid			-588.45	± 0.73	kJ/mol	88.0621 ± 0.0026	127-17-3*500
Ammonium hydroxide			-366.25	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*850
Disulfur cation		1031.48	1032.07	± 0.32	kJ/mol	64.1315 ± 0.0120	12597-02-3*0
Peroxychlorous acid		102.7	96.9	± 2.4	kJ/mol	84.4588 ± 0.0013	177778-92-6*2
Sulfur trioxide			-440.87	± 0.30	kJ/mol	80.0642 ± 0.0061	7446-11-9*590
Cyclic thiozone		168.5	166.7	± 2.3	kJ/mol	96.1980 ± 0.0180	12597-03-40
Sulfanylium		1148.36	1148.36	± 0.19	kJ/mol	33.0734 ± 0.0060	12273-42-6*0
Carbonate		-225.2	-228.4	± 2.5	kJ/mol	60.0100 ± 0.0012	3812-32-6*0
Sulfuric acid			-887.10	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*824
Sulfur hydroxide oxide cation		658.6	647.8	± 3.4	kJ/mol	97.0710 ± 0.0061	12337-07-42
Carbon dioxide			-412.868	± 0.018	kJ/mol	44.00950 ± 0.00100	124-38-9*1000
Sulfurous acid		-511.32	-520.82	± 0.89	kJ/mol	82.0801 ± 0.0061	7782-99-2*0
Sulfurous acid			-606.50	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*1000
Hydrogen sulfite			-631.84	± 0.15	kJ/mol	81.0727 ± 0.0061	15181-46-1*1000
Sulfur dioxide - hydroxyl complex		-266.0	-268.1	± 2.2	kJ/mol	81.0721 ± 0.0061	32750-86-0100
Sulfate monoanion		-736.9	-744.6	± 2.2	kJ/mol	96.0641 ± 0.0061	12143-45-2*0
1,3-Dioxolan-2-one			-581.53	± 0.36	kJ/mol	88.0621 ± 0.0026	96-49-1*500
Bicyclo[1.1.1]pentane-1,3-diyl		783.4	766.1	± 1.8	kJ/mol	66.1011 ± 0.0040	863892-18-6*1
Platinum atom cation		1427.8	1428.3	± 1.7	kJ/mol	195.0775 ± 0.0020	20561-56-2*0
Platinum dimer		823.5	822.5	± 3.9	kJ/mol	390.1560 ± 0.0040	12596-95-1*0
Platinum hydride		451.6	450.7	± 3.8	kJ/mol	196.0859 ± 0.0020	13966-55-7*0
Platinum hydride cation		1363.1	1382.3	± 4.9	kJ/mol	196.0854 ± 0.0020	87882-39-1*0
Hydrogen atom		-37.0	-38.7	± 1.1	kJ/mol	1.007940 ± 0.000070	12385-13-6*1000000
Hydrogen atom		-33.4	-35.1	± 1.5	kJ/mol	1.007940 ± 0.000070	12385-13-6*1000004
Ammonium hydroxide			-366.02	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*855
Dioxodiazoxane		125.7	120.4	± 2.1	kJ/mol	76.01168 ± 0.00091	122413-35-8*3
Ammonia			-80.45	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*850
Diazomethylium		1458.9	1456.8	± 2.2	kJ/mol	41.03157 ± 0.00082	271249-81-1*2
Carbide		2709.5	2714.6	± 2.7	kJ/mol	12.01289 ± 0.00080	12385-15-8*0
1-Propenylium		1233.8	1223.3	± 2.0	kJ/mol	41.0713 ± 0.0024	50457-58-4*1
Diazirinylium		1384.8	1381.2	± 2.1	kJ/mol	41.03157 ± 0.00082	77116-26-8*2
Hydroxylamine			-107.44	± 0.60	kJ/mol	33.02996 ± 0.00037	7803-49-8*500
1-Propenylide		210.4	199.3	± 2.0	kJ/mol	41.0723 ± 0.0024	65887-20-9*1
Iminomethylimidogen cation		1677.6	1676.4	± 2.3	kJ/mol	41.03157 ± 0.00082	150296-30-31
Iminomethylimidogen anion		405.3	402.0	± 2.5	kJ/mol	41.03267 ± 0.00082	150296-30-3*1
Dihydrogen anion		253.8	254.7	± 1.2	kJ/mol	2.01643 ± 0.00014	12184-89-3*0
Chlorine trifluoride cation		1053.5	1049.2	± 2.3	kJ/mol	92.44736 ± 0.00090	478167-77-0*0
Tribromide			-129.17	± 0.22	kJ/mol	239.7125 ± 0.0030	14522-80-6*800
Fluorine atom tetracation		19594.3	19596.6	± 1.7	kJ/mol	18.99620888 ± 0.00000050	14700-79-9*0
Chlorine atom tetracation		12615.5	12617.1	± 4.6	kJ/mol	35.45051 ± 0.00090	22541-74-8*0
(Iminomethyl)imidogen		420.1	413.2	± 2.9	kJ/mol	42.04006 ± 0.00082	87570-07-8*1
Chlorine atom pentacation		19147.	19149.	± 11.	kJ/mol	35.44996 ± 0.00090	20337-89-7*0
1-Hydroxyethenylium		1025.4	1018.3	± 2.9	kJ/mol	43.0441 ± 0.0016	41084-89-3*11
Trioxygen difluoride		112.5	107.3	± 1.1	kJ/mol	85.99501 ± 0.00090	16829-28-0*0
Isocyanogen bromide anion		105.1	101.9	± 4.6	kJ/mol	105.9220 ± 0.0013	238754-53-50
Carbon monoxide		-113.794	-110.514	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*2
Hypochlorite			-110.488	± 0.076	kJ/mol	51.45265 ± 0.00095	14380-61-1*1000
1,2,4-Trioxolane		-204.7	-222.9	± 2.1	kJ/mol	76.0514 ± 0.0019	289-14-5*0
Ammonia			-80.22	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*855
Tetrabromomethane			60.53	± 0.96	kJ/mol	331.6267 ± 0.0041	558-13-4*500
Hydrogen peroxide cation		897.29	890.31	± 0.51	kJ/mol	34.01413 ± 0.00062	12325-10-9*11
Bromomethane		-56.20	-59.22	± 0.20	kJ/mol	94.9385 ± 0.0013	74-83-9*590
Fluorosyl fluoride		227.	225.	± 21.	kJ/mol	53.99621 ± 0.00030	86825-57-2*2
Chlorine atom hexacation		28501.	28503.	± 11.	kJ/mol	35.44941 ± 0.00090	22541-73-7*0
Ethynylene		819.961	826.534	± 0.082	kJ/mol	24.0214 ± 0.0016	12070-15-4*2
Ammonium hydroxide			-366.688	± 0.059	kJ/mol	35.04584 ± 0.00047	1336-21-6*1000
1,2-Propadien-1-ylium-1-yl-3-ylidene		1939.1	1947.0	± 1.3	kJ/mol	36.0316 ± 0.0024	118090-85-0*0
mu-Oxodichlorine cation		1130.44	1126.84	± 0.63	kJ/mol	86.9043 ± 0.0018	51174-96-0*0
Fluorine atom pentacation		30617.6	30619.4	± 1.8	kJ/mol	18.99566030 ± 0.00000050	14701-05-4*0
Oxygen atom tetracation		17719.207	17721.064	± 0.025	kJ/mol	15.99721 ± 0.00030	14127-65-2*0
2-Hydroxyethylium		1024.7	1012.2	± 2.0	kJ/mol	45.0600 ± 0.0017	38607-31-7*1
Trihydrogen		745.878	743.094	± 0.062	kJ/mol	3.02382 ± 0.00021	12184-91-7*1
Ethyl bromide		-55.40	-90.93	± 0.25	kJ/mol	108.9651 ± 0.0019	74-96-4*500
Hydrogen fluoride			-320.69	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*805
Difluoroaminylium		1376.5	1373.9	± 2.4	kJ/mol	52.002998 ± 0.000070	31685-31-1*1
2-Propen-1-ylium-1-ylidene		1373.2	1369.6	± 2.0	kJ/mol	39.0554 ± 0.0024	88000-25-3*0
Cyclopropane cation		1021.8	1006.3	± 1.5	kJ/mol	42.0792 ± 0.0024	34496-93-0*0
2-Methylpentane		-180.18	-203.83	± 0.73	kJ/mol	86.1754 ± 0.0049	107-83-5*500
Fluorine atom trication		11182.872	11186.697	± 0.032	kJ/mol	18.99675746 ± 0.00000050	14700-88-0*0
Difluorovinylidene cation		1181.5	1183.0	± 2.3	kJ/mol	62.0177 ± 0.0016	268566-71-8*0
Hydrogen peroxide		-129.426	-135.412	± 0.057	kJ/mol	34.01468 ± 0.00062	7722-84-1*2
Ketene		-45.34	-48.40	± 0.11	kJ/mol	42.0367 ± 0.0016	463-51-4*21
Hydrazoic acid			257.70	± 0.48	kJ/mol	43.02816 ± 0.00022	7782-79-8*1000
3-Methylpentane		-177.63	-201.89	± 0.76	kJ/mol	86.1754 ± 0.0049	96-14-0*500
1-Propen-1-yl-3-ylidene		656.7	653.3	± 1.1	kJ/mol	39.0559 ± 0.0024	84654-90-0*1
Chloro(chlorooxy)methylene		101.1	104.7	± 4.8	kJ/mol	98.9155 ± 0.0020	479587-31-0*12
2,3-Dimethylbutane		-182.42	-206.93	± 0.81	kJ/mol	86.1754 ± 0.0049	79-29-8*500
Nitrogen atom anion		488.2	490.5	± 2.3	kJ/mol	14.007289 ± 0.000070	17778-87-9*0
Nitrogen atom dication		4728.998	4731.826	± 0.024	kJ/mol	14.005643 ± 0.000070	17439-59-7*0
Hydrazoic acid anion		316.3	310.1	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*2
Water		-286.276	-292.717	± 0.022	kJ/mol	18.01528 ± 0.00033	7732-18-5*510
1,3,5-Hexatriynylium		1952.5	1961.4	± 7.6	kJ/mol	73.0716 ± 0.0048	81932-75-4*2
Oxygen atom dication		4949.458	4953.000	± 0.013	kJ/mol	15.99830 ± 0.00030	14127-63-0*0
Peroxyhypochlorous acid cation		1050.8	1045.2	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-22
Methyl acetate		-394.15	-413.01	± 0.56	kJ/mol	74.0785 ± 0.0025	79-20-9*0
Carbon suboxide		-131.19	-116.15	± 0.97	kJ/mol	68.0309 ± 0.0025	504-64-3*500
Ammonia			-77.033	± 0.056	kJ/mol	17.03056 ± 0.00022	7664-41-7*800
Oxoniumyl ion		978.492	975.588	± 0.024	kJ/mol	18.01473 ± 0.00033	56583-62-1*1
Nitrosyl nitrate		60.4	52.5	± 1.9	kJ/mol	92.0111 ± 0.0012	15969-55-8*2
Ammonia			-75.73	± 0.57	kJ/mol	17.03056 ± 0.00022	7664-41-7*801
Hypoiodous acid			-146.9	± 4.9	kJ/mol	143.91181 ± 0.00031	14332-21-9*1000
m-Benzyne		615.0	605.6	± 1.4	kJ/mol	76.0960 ± 0.0048	1828-89-3*1
Dinitrogen dimer		-0.88	0.84	± 0.67	kJ/mol	56.02696 ± 0.00028	154680-01-0*0
Methyl formate		-346.85	-359.90	± 0.61	kJ/mol	60.0520 ± 0.0017	107-31-3*0
Fulvenallene		549.0	536.7	± 2.4	kJ/mol	90.1225 ± 0.0056	27041-32-3*1
Ethyl formate		-375.0	-393.8	± 1.0	kJ/mol	74.0785 ± 0.0025	109-94-4*0
Cycloheptatetraene		529.0	515.0	± 2.3	kJ/mol	90.1225 ± 0.0056	52783-93-4*1
4,5-Bis(methylene)-2-cyclopenten-1-yl		315.3	297.1	± 2.0	kJ/mol	91.1305 ± 0.0056	302792-28-5*0
2,5-Bis(methylene)-3-cyclopenten-1-yl		321.0	302.8	± 2.0	kJ/mol	91.1305 ± 0.0056	512782-58-0*0
Ammonia			-78.02	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*803
Formaldehyde		-105.381	-109.222	± 0.094	kJ/mol	30.02598 ± 0.00087	50-00-0*21
Bicyclo[1.1.0]buta-1,3-diene-2,4-diyl		1047.09	1054.69	± 0.67	kJ/mol	48.0428 ± 0.0032	12184-80-4*2
Nitrogen atom trication		9306.69	9308.55	± 0.23	kJ/mol	14.005094 ± 0.000070	18396-22-0*0
Hydroxyoxoammoniumyl		1014.8	1008.4	± 2.0	kJ/mol	47.01293 ± 0.00061	80371-48-8*2
Ammonia			-80.57	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*839
Oxygen atom pentacation		28708.788	28710.645	± 0.053	kJ/mol	15.99666 ± 0.00030	14127-66-3*0
Nitrogen atom tetracation		16781.74	16783.61	± 0.23	kJ/mol	14.004546 ± 0.000070	14452-70-1*0
Ammonia			-80.06	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*861
Tropylide		261.7	245.3	± 2.0	kJ/mol	91.1310 ± 0.0056	34464-18-1*0
Hydrogen bromide			-120.24	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*952
Propylidene		349.49	335.72	± 0.92	kJ/mol	42.0797 ± 0.0024	6700-78-3*1
Fluorine atom octacation		155686.5	155688.3	± 1.8	kJ/mol	18.99401456 ± 0.00000050	15721-58-1*0
Isoindene cation		985.2	961.9	± 1.8	kJ/mol	116.1593 ± 0.0072	1442045-79-5*0
Polyoxymethylene			-170.86	± 0.21	kJ/mol	30.02598 ± 0.00087	9002-81-7*500
Indenylium		1081.2	1061.6	± 2.2	kJ/mol	115.1513 ± 0.0072	12203-21-3*1
Methyl hydrocarbonate		-577.03	-591.84	± 0.87	kJ/mol	76.0514 ± 0.0019	7456-87-3*0
Nitrous acid anion		-105.4	-109.4	± 1.8	kJ/mol	47.01403 ± 0.00061	256393-36-9*1
1,3-Butadiyn-4-ylium-1-yl		2109.8	2120.4	± 2.8	kJ/mol	48.0423 ± 0.0032	124708-46-9*0
Formaldehyde			-165.65	± 0.22	kJ/mol	30.02598 ± 0.00087	50-00-0*1000
Peroxyhypochlorous acid anion		-2.8	-3.3	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-31
Acetoxy		-182.09	-190.81	± 0.80	kJ/mol	59.0440 ± 0.0017	13799-69-4*0
Ammonia			-78.87	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*805
1,3-Butadiyne-1,4-diyl		1052.20	1062.17	± 0.64	kJ/mol	48.0428 ± 0.0032	78015-07-3*1
1-Methylethenyl anion		199.4	188.2	± 2.0	kJ/mol	41.0723 ± 0.0024	65887-19-6*0
Hypoiodite			-116.3	± 5.4	kJ/mol	142.90442 ± 0.00030	15065-65-3*800
Ammonia			-80.58	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*833
Hydrogen iodide			-56.643	± 0.089	kJ/mol	127.912410 ± 0.000076	10034-85-2*958
Ammonia			-79.33	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*807
Oxygen atom trication		10249.928	10252.880	± 0.018	kJ/mol	15.99775 ± 0.00030	14127-64-1*0
Tetrafluorohydrazine		-12.5	-22.1	± 1.4	kJ/mol	104.00709 ± 0.00014	10036-47-2*2
2,2-Dimethylbutane		-187.93	-213.65	± 0.75	kJ/mol	86.1754 ± 0.0049	75-83-2*500
Propionic acid		-435.82	-453.71	± 0.60	kJ/mol	74.0785 ± 0.0025	79-09-4*0
2-Chloro ozone		265.7	265.1	± 3.7	kJ/mol	83.4509 ± 0.0013	141801-66-30
Fluorine atom		77.254	79.039	± 0.017	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*1
Ammonia			-80.50	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*844
Oxygen atom octacation		197447.75	197449.60	± 0.12	kJ/mol	15.99501 ± 0.00030	21450-98-6*0
Hydrogen peroxide cation		931.06	924.20	± 0.98	kJ/mol	34.01413 ± 0.00062	12325-10-9*22
Trioxirane cation		1444.4	1442.2	± 2.2	kJ/mol	47.99765 ± 0.00090	153851-84-40
Bromodioxy		116.7	107.7	± 3.8	kJ/mol	111.9028 ± 0.0012	67177-47-3*0
Hydrazoic acid			272.69	± 0.47	kJ/mol	43.02816 ± 0.00022	7782-79-8*800
Ammonium oxide		-428.47	-430.46	± 0.61	kJ/mol	52.07640 ± 0.00065	12161-77-2*500
Succinic acid		-918.50	-940.23	± 0.12	kJ/mol	118.0880 ± 0.0034	110-15-6*500
2-Oxo-1-ethylium-1-yl		1292.0	1288.7	± 2.4	kJ/mol	42.0361 ± 0.0016	214464-96-7*12
Water trimer		-762.66	-776.76	± 0.20	kJ/mol	54.04584 ± 0.00099	31014-12-7*0
1,2-Dibromoethane			-80.1	± 1.2	kJ/mol	187.8612 ± 0.0026	106-93-4*500
Trihydrogen cation		1110.304	1106.697	± 0.013	kJ/mol	3.02327 ± 0.00021	28132-48-1*2
Methylene		391.066	391.612	± 0.093	kJ/mol	14.02658 ± 0.00081	2465-56-7*0
1,3-Butadien-2-ol		-42.6	-59.1	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*21
1,3-Butadien-2-ol		-53.3	-68.6	± 1.5	kJ/mol	70.0898 ± 0.0032	59120-04-6*1
Propadienylidene		554.44	555.58	± 0.39	kJ/mol	38.0480 ± 0.0024	60731-10-4*2
Chlorine atom		119.621	121.228	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*1
Fluorine atom hexacation		45781.5	45783.3	± 1.8	kJ/mol	18.99511172 ± 0.00000050	14701-04-3*0
Oxoethylidene anion		92.3	89.0	± 2.3	kJ/mol	42.0372 ± 0.0016	106543-38-8*2
Acrolein		-55.13	-65.22	± 0.64	kJ/mol	56.0633 ± 0.0024	107-02-8*0
Deuterium molecule cation		1492.286	1492.361	± 0.000	kJ/mol	4.02765497609 ± 0.00000000080	12184-84-8*0
Hydroxymethylene		112.70	108.95	± 0.27	kJ/mol	30.02598 ± 0.00087	19710-56-6*0
1-Oxo-2-propenide		83.6	78.7	± 2.5	kJ/mol	55.0559 ± 0.0024	78944-75-9*2
Propadien-1-olate		1.4	-4.4	± 2.5	kJ/mol	55.0559 ± 0.0024	109686-13-7*0
1-Formylethenylium		1158.8	1154.2	± 3.0	kJ/mol	55.0548 ± 0.0024	101705-89-9*1
Tribromine cation		1036.3	1013.6	± 2.5	kJ/mol	239.7115 ± 0.0030	33105-86-1*0
3-Oxo-1-propenyl		190.96	184.98	± 0.91	kJ/mol	55.0553 ± 0.0024	206255-29-0*1
3-Oxo-1-propenyl		191.7	185.7	± 2.1	kJ/mol	55.0553 ± 0.0024	206255-29-0*21
2-Formylethen-1-ide		30.5	23.8	± 3.1	kJ/mol	55.0559 ± 0.0024	135924-69-5*21
1,2-Propadien-1-one cation		1012.8	1011.3	± 1.8	kJ/mol	54.0468 ± 0.0024	87612-93-9*0
2-Propynal cation		1168.3	1167.2	± 1.2	kJ/mol	54.0468 ± 0.0024	100815-70-1*0
Formylethynyl cation		1540.0	1541.9	± 2.7	kJ/mol	53.0389 ± 0.0024	85905-64-22
Formylethynyl cation		1540.7	1542.8	± 2.8	kJ/mol	53.0389 ± 0.0024	85905-64-21
Difluorodioxidanium		1287.2	1283.1	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-02
Hydrogen fluoride			-321.36	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*1000
Acetylene anion		356.9	356.7	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*0
(Hydroxyimino)methyl		258.9	252.8	± 2.0	kJ/mol	44.03272 ± 0.00087	206442-92-4*2
2-Iminoethyl		221.7	210.4	± 1.8	kJ/mol	42.0599 ± 0.0016	73843-90-0*1
2-Iminoethyl anion		110.7	100.2	± 2.3	kJ/mol	42.0604 ± 0.0016	73843-87-5*2
Cyanoacetylene cation		1495.56	1497.86	± 0.57	kJ/mol	51.0462 ± 0.0024	85398-68-1*0
Isocyanoacetylene cation		1567.8	1570.3	± 1.3	kJ/mol	51.0462 ± 0.0024	145076-03-5*0
Cyanoethynylium		1867.5	1874.2	± 3.2	kJ/mol	50.0383 ± 0.0024	104233-69-4*0
2-Iminoethylium		1108.3	1097.6	± 2.9	kJ/mol	42.0594 ± 0.0016	73843-91-1*2
Deuteride		146.991	148.904	± 0.0021	kJ/mol	2.01465035791 ± 0.00000000040	14452-69-8*0
3-Imino-2-propen-1-ylidene		530.7	526.4	± 1.2	kJ/mol	53.0627 ± 0.0024	916765-05-4*1
Ammonia			-79.63	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*809
2-(Methylidyneamino)ethenyl		600.7	596.4	± 1.2	kJ/mol	53.0627 ± 0.0024	123416-74-0*1
Chlorodioxidenium		1215.1	1212.9	± 6.3	kJ/mol	67.4510 ± 0.0011	64710-10-7*0
(E)-2-Iminoethylium		1108.3	1094.9	± 2.9	kJ/mol	42.0594 ± 0.0016	91127-33-2*0
Ammonia			-80.16	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*815
(Z)-2-Iminoethylium		1151.8	1143.1	± 3.3	kJ/mol	42.0594 ± 0.0016	91127-34-3*0
(Z)-2-Iminoethylium		1151.8	1143.1	± 3.3	kJ/mol	42.0594 ± 0.0016	91127-34-3*11
sec-Butylium		792.8	769.1	± 1.5	kJ/mol	57.1137 ± 0.0033	16548-59-7*0
Tetraoxygen		69.8	65.1	± 4.4	kJ/mol	63.9976 ± 0.0012	12596-83-7*21
Tetraoxygen		399.0	393.4	± 3.9	kJ/mol	63.9976 ± 0.0012	12596-83-7*23
Tetraoxygen		465.6	459.6	± 4.2	kJ/mol	63.9976 ± 0.0012	12596-83-7*24
Carbon trication		8770.919	8776.065	± 0.045	kJ/mol	12.00905 ± 0.00080	14067-06-2*0
Dioxaziridine		277.5	270.8	± 1.9	kJ/mol	47.01348 ± 0.00061	67394-35-8*0
Nitrosyl nitrite anion		-100.2	-103.4	± 2.9	kJ/mol	76.01223 ± 0.00091	122413-35-82
1,2-Butadien-1-ylium-1-yl		1466.9	1461.7	± 3.1	kJ/mol	52.0740 ± 0.0032	161054-21-3*0
Bicyclo[1.1.0]butan-3-id-1-yl		524.6	515.9	± 2.6	kJ/mol	52.0751 ± 0.0032	131273-95-5*0
1,2-Cyclobutadiene		586.0	579.4	± 2.2	kJ/mol	52.0746 ± 0.0032	50682-90-1*0
Hydrogen fluoride			-322.01	± 0.10	kJ/mol	20.006343 ± 0.000070	7664-39-3*828
Water		-238.907	-241.810	± 0.022	kJ/mol	18.01528 ± 0.00033	7732-18-5*2
But-3-en-1-yn-1-ide		559.2	558.5	± 2.2	kJ/mol	51.0672 ± 0.0032	58870-47-6*1
Nitrogen atom pentacation		26226.70	26228.56	± 0.23	kJ/mol	14.003997 ± 0.000070	20508-99-0*0
Methylaminyliumyl		1388.2	1381.9	± 2.2	kJ/mol	29.04071 ± 0.00083	56924-51-7*1
Carbon pentacation		52824.581	52829.727	± 0.049	kJ/mol	12.00796 ± 0.00080	14280-11-6*0
Dimethyl carbonate		-550.04	-570.47	± 0.37	kJ/mol	90.0779 ± 0.0026	616-38-6*0
Trihydrogen		215.9	218.3	± 1.1	kJ/mol	3.02382 ± 0.00021	12184-91-7*100
Silicon atom dication		2814.00	2816.98	± 0.56	kJ/mol	28.08440 ± 0.00030	14175-55-4*0
Silicon atom trication		6045.58	6048.56	± 0.56	kJ/mol	28.08385 ± 0.00030	14175-56-5*0
Acetaldehyde		-186.91	-191.62	± 0.28	kJ/mol	44.0526 ± 0.0017	75-07-0*500
Dioxosilane		-901.5	-906.3	± 1.4	kJ/mol	60.08430 ± 0.00067	7631-86-9*515
Oxosilyliumyl		1022.0	1023.1	± 2.9	kJ/mol	44.08435 ± 0.00042	12359-18-1*0
Difluorine cation		1514.301	1514.475	± 0.013	kJ/mol	37.9962578 ± 0.0000010	12184-86-0*0
Hydroxylamine		-33.06	-43.43	± 0.42	kJ/mol	33.02996 ± 0.00037	7803-49-8*0
2-Aminoethenylium		1117.9	1106.8	± 2.4	kJ/mol	42.0594 ± 0.0016	64724-21-6*11
Iodine monochloride			-24.048	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*590
Ammonia			-80.38	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*818
2-Aminoethenyl anion		242.0	231.3	± 2.6	kJ/mol	42.0604 ± 0.0016	64724-21-61
1-Hydroperoxyethylium		690.5	675.6	± 1.5	kJ/mol	61.0594 ± 0.0017	126898-98-42
mu-Hydrotetrahydrodisilicon cation		981.6	968.8	± 2.8	kJ/mol	61.21015 ± 0.00069	160896-65-1*0
Di-mu-hydrotrihydrodisilicon cation		1033.7	1020.3	± 2.8	kJ/mol	61.21015 ± 0.00069	160896-65-10
Disilene anion		178.6	170.2	± 3.0	kJ/mol	60.20331 ± 0.00066	157379-08-3*0
1-Methylethenylium		995.2	986.0	± 1.9	kJ/mol	41.0713 ± 0.0024	50457-57-3*0
Silylsilylene anion		160.3	151.6	± 3.0	kJ/mol	60.20331 ± 0.00066	286949-98-2*0
Silylsilylene		381.3	372.5	± 2.6	kJ/mol	60.20276 ± 0.00066	50420-90-1*1
mu-Hydrotrihydrodisilicon		317.9	307.8	± 2.1	kJ/mol	60.20276 ± 0.00066	497967-56-3*0
mu-Hydrotrihydrodisilicon cation		1160.1	1152.0	± 2.6	kJ/mol	60.20221 ± 0.00066	497967-55-20
2-Hydroperoxyethyl		65.1	51.2	± 2.2	kJ/mol	61.0599 ± 0.0017	126898-97-3*11
Hypochloroperoxoous acid, hydroxy ester		48.7	41.8	± 2.5	kJ/mol	84.4588 ± 0.0013	928652-99-7*2
Fluoroimidogen		369.43	369.41	± 0.80	kJ/mol	33.005143 ± 0.000070	13967-06-1*2
Silyloxoniumylidene		1096.3	1089.9	± 2.9	kJ/mol	47.10817 ± 0.00047	152720-17-7*1
Hydroxysilylium		600.3	591.6	± 2.9	kJ/mol	47.10817 ± 0.00047	66639-72-3*0
Nitrogen atom hexacation		79493.10	79494.96	± 0.23	kJ/mol	14.003449 ± 0.000070	15721-56-9*0
1,5-Hexadiyne			385.9	± 1.9	kJ/mol	78.1118 ± 0.0048	628-16-0*500
Carbon hexacation		100101.735	100106.882	± 0.049	kJ/mol	12.00741 ± 0.00080	16249-02-8*0
Peroxyformate		-320.7	-326.5	± 1.7	kJ/mol	61.0174 ± 0.0012	104960-05-6*2
2-Methyl-2-propanol			-358.9	± 1.9	kJ/mol	74.1216 ± 0.0033	75-65-0*590
Peroxyformyl		-90.4	-95.9	± 1.7	kJ/mol	61.0168 ± 0.0012	56240-83-6*2
Bicyclo[3.1.0]hexa-1,3-diene		406.5	390.9	± 2.2	kJ/mol	78.1118 ± 0.0048	28425-23-2*0
Acetylene		599.1	599.0	± 1.5	kJ/mol	26.0373 ± 0.0016	74-86-2*11
3-Ethenylidenecyclobutene		406.5	392.4	± 2.3	kJ/mol	78.1118 ± 0.0048	813466-23-8*0
3,4-Hexadien-1-yne		418.6	407.5	± 2.6	kJ/mol	78.1118 ± 0.0048	194024-51-6*0
3-Ethynylcyclobutene		421.7	407.4	± 2.4	kJ/mol	78.1118 ± 0.0048	175090-90-1*0
Chlorine atom trication		7487.2	7490.2	± 3.3	kJ/mol	35.45105 ± 0.00090	16547-50-5*0
2-Ethynyl-2-cyclopropen-1-ylidene		726.1	727.4	± 3.2	kJ/mol	62.0694 ± 0.0040	117992-84-4*0
mu-Oxodichlorate anion		-147.8	-147.7	± 2.5	kJ/mol	86.9053 ± 0.0018	365546-30-1*0
Pyramidane		602.4	593.9	± 2.3	kJ/mol	64.0853 ± 0.0040	66202-79-7*0
Spiropentadiene		651.9	644.6	± 2.3	kJ/mol	64.0853 ± 0.0040	1727-65-7*0
2-Aminoethylium		1042.6	1026.1	± 2.4	kJ/mol	44.0752 ± 0.0017	54088-54-9*1
2-Aminoethyl anion		149.0	131.9	± 2.1	kJ/mol	44.0763 ± 0.0017	71857-14-2*0
Isocyanogen cation		1654.1	1656.5	± 1.4	kJ/mol	52.0343 ± 0.0016	133415-63-1*0
Formic acid			-425.38	± 0.45	kJ/mol	46.0254 ± 0.0010	64-18-6*1000
1,2-Diphenylethane		180.68	142.20	± 0.76	kJ/mol	182.2610 ± 0.0112	103-29-7*0
Oxonium		605.89	599.13	± 0.17	kJ/mol	19.02267 ± 0.00037	13968-08-6*2
2-Naphthalenylium		1195.7	1177.8	± 3.5	kJ/mol	127.1620 ± 0.0080	79319-69-0*0
1-Naphthalenylium		1192.7	1174.8	± 3.4	kJ/mol	127.1620 ± 0.0080	79319-68-9*0
Tetraoxodinitrate anion		-184.6	-187.8	± 2.4	kJ/mol	92.0116 ± 0.0012	63552-02-3*0
Diisocyanogen cation		1838.6	1842.5	± 3.1	kJ/mol	52.0343 ± 0.0016	78800-21-22
Biphenyl			113.7	± 1.1	kJ/mol	154.2078 ± 0.0096	92-52-4*590
Benzophenone		-16.7	-42.0	± 1.5	kJ/mol	182.2179 ± 0.0104	119-61-9*510
Buckminsterfullerene		2522.9	2518.3	± 6.3	kJ/mol	720.6420 ± 0.0480	99685-96-8*0
Buckminsterfullerene		2327.8	2337.2	± 6.4	kJ/mol	720.6420 ± 0.0480	99685-96-8*500
Cyclobutatrienyl		962.0	965.5	± 2.4	kJ/mol	49.0507 ± 0.0032	99417-52-40
Helium anion		1904.822	1904.822	± 0.000	kJ/mol	4.0031506 ± 0.0000020	14452-58-5*3
Helium anion		5724.96	5724.96	± 0.32	kJ/mol	4.0031506 ± 0.0000020	14452-58-5*4
Dihelium cation		2143.643	2139.915	± 0.018	kJ/mol	8.0046554 ± 0.0000040	12184-99-5*0
Dihelium anion		1714.9	1711.2	± 1.9	kJ/mol	8.0057526 ± 0.0000040	90188-47-9*1
Ammonia			-80.52	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*822
Helium dihydride		-0.05	0.87	± 0.42	kJ/mol	6.01848 ± 0.00014	33309-42-1*0
Helium dihydride		614.5	608.9	± 2.6	kJ/mol	6.01848 ± 0.00014	33309-42-10
Dihydrohelium cation		1572.2	1568.9	± 2.4	kJ/mol	6.01793 ± 0.00014	12500-88-80
Neon dication		6032.988	6033.214	± 0.0041	kJ/mol	20.17860 ± 0.00060	14041-55-5*0
Neon trication		12152.403	12152.403	± 0.032	kJ/mol	20.17805 ± 0.00060	14158-25-9*0
Neon tetracation		21529.82	21531.45	± 0.25	kJ/mol	20.17751 ± 0.00060	14041-56-6*0
Neon pentacation		33711.1	33711.1	± 1.2	kJ/mol	20.17696 ± 0.00060	14175-48-5*0
Neon hexacation		48949.3	48949.3	± 1.3	kJ/mol	20.17641 ± 0.00060	14041-57-7*0
Neon heptacation		68948.7	68948.7	± 1.4	kJ/mol	20.17586 ± 0.00060	14175-50-9*0
Neon octacation		92018.2	92018.2	± 1.4	kJ/mol	20.17531 ± 0.00060	14782-26-4*0
Neon nonacation		207396.1	207396.1	± 1.4	kJ/mol	20.17476 ± 0.00060	15721-59-2*0
Sulfur atom dication		3528.18	3531.88	± 0.14	kJ/mol	32.0649 ± 0.0060	14127-58-3*0
Sulfur atom trication		6890.8	6892.8	± 3.2	kJ/mol	32.0644 ± 0.0060	22541-72-6*0
Sulfur atom tetracation		11447.1	11448.8	± 3.4	kJ/mol	32.0638 ± 0.0060	20681-10-1*0
Sulfur atom pentacation		18451.4	18453.2	± 3.4	kJ/mol	32.0633 ± 0.0060	14127-59-4*0
Dioxathiirane		166.2	163.7	± 2.2	kJ/mol	64.0648 ± 0.0060	191663-73-7*0
Sulfur trioxide			-454.31	± 0.37	kJ/mol	80.0642 ± 0.0061	7446-11-9*500
3-Oxidedioxathiirane		-127.9	-132.8	± 2.2	kJ/mol	80.0642 ± 0.0061	2243010-16-2*0
Trioxathietane		263.6	258.5	± 2.3	kJ/mol	80.0642 ± 0.0061	2243010-16-20
Oxadithiirane		136.4	134.3	± 2.5	kJ/mol	80.1314 ± 0.0120	488092-02-0*0
Sulfanylideneoxidaniumthiolate		220.7	219.0	± 2.0	kJ/mol	80.1314 ± 0.0120	401811-43-6*0
Ammonia			-80.56	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*828
Thiozone cation		1073.1	1071.5	± 2.0	kJ/mol	96.1975 ± 0.0180	60063-56-1*0
cyc-Thiozone cation		1040.2	1039.6	± 2.7	kJ/mol	96.1975 ± 0.0180	60063-56-10
cyc-Trisulfide		15.2	14.6	± 2.5	kJ/mol	96.1985 ± 0.0180	12597-04-50
Hydrazine monohydrate			-242.59	± 0.19	kJ/mol	50.06052 ± 0.00053	7803-57-8*500
Sulfuric acid		-878.92	-909.16	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*800
Fluorine atom heptacation		63649.3	63651.1	± 1.8	kJ/mol	18.99456314 ± 0.00000050	14700-77-7*0
Sulfuric acid			-886.35	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*821
Sulfuric acid			-891.25	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*835
Sulfuric acid			-891.62	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*837
Sulfuric acid			-893.41	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*840
Sulfuric acid			-894.37	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*841
Sulfuric acid			-895.83	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*842
Sulfuric acid			-897.86	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*844
Dioxofluorine cation		1667.0	1664.8	± 2.8	kJ/mol	50.99665 ± 0.00060	223566-05-0*0
Oxygen atom heptacation		113369.48	113371.34	± 0.12	kJ/mol	15.99556 ± 0.00030	14274-89-6*0
Sulfuric acid			-886.91	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*823
Sulfuric acid			-887.26	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*826
Sulfuric acid			-887.40	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*827
Sulfuric acid			-891.44	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*836
Sulfuric acid			-892.87	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*954
Sulfuric acid			-898.58	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*845
Sulfuric acid			-899.50	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*847
Sulfuric acid			-899.76	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*848
Sulfuric acid			-900.23	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*849
Sulfuric acid monohydrate		-1126.33	-1127.48	± 0.13	kJ/mol	116.0948 ± 0.0062	10193-30-3*500
Sulfuric acid dihydrate		-1422.15	-1426.94	± 0.14	kJ/mol	134.1100 ± 0.0063	13451-10-0*500
Sulfuric acid trihydrate		-1716.10	-1720.21	± 0.15	kJ/mol	152.1253 ± 0.0064	40835-65-2*500
Sulfuric acid tetrahydrate		-2006.95	-2010.99	± 0.17	kJ/mol	170.1406 ± 0.0065	37006-20-5*500
Sulfuric acid pentahydrate			-2300.39	± 0.18	kJ/mol	188.1559 ± 0.0066	137168-49-1*500
Sulfuric acid hexahydrate			-2588.94	± 0.20	kJ/mol	206.1712 ± 0.0068	137168-50-4*500
Sulfuric acid heptahydrate			-2876.89	± 0.22	kJ/mol	224.1864 ± 0.0069	137168-51-5*500
Sulfuric acid octahydrate			-3164.40	± 0.24	kJ/mol	242.2017 ± 0.0071	88434-16-6*500
Sulfuric acid nonahydrate			-3451.56	± 0.25	kJ/mol	260.2170 ± 0.0073	137168-52-6*500
Sulfuric acid decahydrate			-3738.46	± 0.27	kJ/mol	278.2323 ± 0.0075	137168-53-7*500
Sulfuric acid dodecahydrate			-4311.68	± 0.31	kJ/mol	314.2628 ± 0.0079	30383-99-4*500
Sulfuric acid pentadecahydrate			-5170.58	± 0.37	kJ/mol	368.3087 ± 0.0086	425605-43-2*500
Dioxofluorine anion		155.9	154.4	± 2.5	kJ/mol	50.99775 ± 0.00060	175861-93-50
Formylimidogen		245.3	242.1	± 3.3	kJ/mol	43.02478 ± 0.00086	42288-92-6*2
Carbonic acid			-698.673	± 0.028	kJ/mol	62.0248 ± 0.0012	463-79-6*1000
Ethynylaminylium		1350.6	1348.8	± 2.5	kJ/mol	40.0435 ± 0.0016	103835-08-1*2
Fluorine atom dication		5132.472	5134.257	± 0.021	kJ/mol	18.99730604 ± 0.00000050	14701-07-6*0
Cyanoamidogen		657.4	654.6	± 2.0	kJ/mol	41.03212 ± 0.00082	12347-01-2*22
Sulfur tetraoxide		-205.1	-211.3	± 2.6	kJ/mol	96.0636 ± 0.0061	12772-98-4*12
Chlorine atom dication		3668.474	3670.081	± 0.013	kJ/mol	35.45160 ± 0.00090	15723-23-6*0
Dioxoperoxysulfane		-177.1	-177.5	± 3.5	kJ/mol	96.0636 ± 0.0061	103613-08-712
Thioformaldehyde cation		1025.9	1022.3	± 2.0	kJ/mol	46.0920 ± 0.0061	61356-81-8*0
Trioxodinitrate anion		-87.3	-93.0	± 2.2	kJ/mol	76.01223 ± 0.00091	194856-62-7*1
Cyclopentadiene			110.36	± 0.56	kJ/mol	66.1011 ± 0.0040	542-92-7*590
Dimethylsulfoxide			-203.59	± 0.49	kJ/mol	78.1344 ± 0.0062	67-68-5*590
Nitride		1879.1	1881.0	± 4.4	kJ/mol	14.008386 ± 0.000070	18851-77-9*0
Hydrogen chloride			-161.149	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*815
Ammonium hydroxide			-366.35	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*842
3-Diaziridinylidene cation		1497.2	1491.7	± 3.1	kJ/mol	42.03951 ± 0.00082	85513-79-72
Benzylidene		473.0	457.7	± 1.3	kJ/mol	90.1225 ± 0.0056	3101-08-4*0
Diazene anion		265.6	258.8	± 2.0	kJ/mol	30.02991 ± 0.00020	100429-75-2*1
Acetic acid			-482.91	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*801
Hydrogen bromide			-119.36	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*825
Fulvenallene		368.6	354.3	± 1.1	kJ/mol	90.1225 ± 0.0056	27041-32-3*0
Acetic acid			-482.86	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*802
Tetroxidane		-33.33	-43.26	± 0.44	kJ/mol	66.0135 ± 0.0012	29683-94-1*0
Benzocyclopropene		395.9	379.6	± 1.5	kJ/mol	90.1225 ± 0.0056	4646-69-9*0
Cycloheptatetraene		418.7	403.1	± 1.3	kJ/mol	90.1225 ± 0.0056	52783-93-4*0
Acetic acid			-482.87	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*803
Acetic acid			-482.96	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*804
Hydrogen bromide			-119.51	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*828
Isocyanoamidogen		828.2	825.6	± 1.3	kJ/mol	41.03212 ± 0.00082	947408-73-3*2
(Iminomethyl)imidogen		420.1	413.2	± 2.9	kJ/mol	42.04006 ± 0.00082	87570-07-8*0
Oxirane		-77.13	-77.80	± 0.60	kJ/mol	44.0526 ± 0.0017	75-21-8*500
(Iminomethyl)imidogen		430.4	423.5	± 3.3	kJ/mol	42.04006 ± 0.00082	87570-07-8*12
Methyl hydrocarbonate		-532.5	-547.6	± 2.0	kJ/mol	76.0514 ± 0.0019	7456-87-3*4
Acetic acid			-483.04	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*805
Formaldehyde		-105.255	-109.221	± 0.094	kJ/mol	30.02598 ± 0.00087	50-00-0*22
Acetic acid			-483.15	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*807
Cyclopentadienide		101.15	88.18	± 0.96	kJ/mol	65.0937 ± 0.0040	12127-83-2*0
Acetic acid			-483.19	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*808
Nitrogen atom		700.559	702.462	± 0.022	kJ/mol	14.006740 ± 0.000070	17778-88-0*2
Isocyanic fluoride anion		73.9	75.6	± 5.7	kJ/mol	45.01639 ± 0.00080	357426-78-9*0
Isocyanomethane			146.4	± 2.2	kJ/mol	41.0520 ± 0.0016	593-75-9*500
trans-Cycloheptene		142.0	103.9	± 1.9	kJ/mol	96.1702 ± 0.0057	45509-99-7*0
Cyanogen chloride cation		1326.21	1327.54	± 0.95	kJ/mol	61.4696 ± 0.0012	37612-72-9*0
Hydrogen chloride			-166.404	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*833
Acetic acid			-483.22	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*809
Ammonium hydroxide			-366.36	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*841
Carbon dianion		1027.5	1033.0	± 4.9	kJ/mol	12.01180 ± 0.00080	50802-47-6*0
Acetic acid			-483.29	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*811
Hydrogen chloride			-166.488	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*835
1-Hydroxy-2-propanone		-354.44	-373.77	± 0.84	kJ/mol	74.0785 ± 0.0025	116-09-6*0
Hydrogen chloride			-166.517	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*837
Hydrogen iodide			-56.691	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*850
Hydrogen peroxide cation		931.08	924.20	± 0.98	kJ/mol	34.01413 ± 0.00062	12325-10-9*21
Hydrogen fluoride			-322.26	± 0.10	kJ/mol	20.006343 ± 0.000070	7664-39-3*832
Formic acid			-425.37	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*850
Bicyclo[1.1.0]buta-1,3-diene-2,4-diyl		1133.0	1140.9	± 2.7	kJ/mol	48.0428 ± 0.0032	12184-80-4*1
Propylidene		349.49	335.80	± 0.92	kJ/mol	42.0797 ± 0.0024	6700-78-3*0
Indane cation		909.4	879.5	± 1.7	kJ/mol	118.1752 ± 0.0072	78854-02-1*0
Acetic acid			-483.36	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*812
Isocyanoamidogen		837.9	835.2	± 2.1	kJ/mol	41.03212 ± 0.00082	947408-73-3*21
Oxirene		272.43	270.27	± 0.60	kJ/mol	42.0367 ± 0.0016	157-18-6*0
Indene anion		238.2	215.8	± 3.9	kJ/mol	116.1604 ± 0.0072	39526-38-0*0
Oxirene		387.7	384.4	± 1.3	kJ/mol	42.0367 ± 0.0016	157-18-6*1
Formic acid			-425.38	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*852
Hydrogen fluoride			-324.98	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*847
Isoindene anion		239.8	217.1	± 3.9	kJ/mol	116.1604 ± 0.0072	496764-61-5*0
Hydrobromate ion		-5.5	-12.0	± 4.3	kJ/mol	80.9125 ± 0.0010	85532-97-4*0
Difluorodiazene		78.5	73.4	± 2.1	kJ/mol	66.01029 ± 0.00014	10578-16-2*0
Cyanogen chloride anion		46.8	51.2	± 3.1	kJ/mol	61.4707 ± 0.0012	12281-43-5*0
Indenide		125.3	105.3	± 1.6	kJ/mol	115.1524 ± 0.0072	12128-54-0*0
Indenylium		1030.2	1010.7	± 2.0	kJ/mol	115.1513 ± 0.0072	12203-21-3*0
Phenol cation		746.49	727.70	± 0.63	kJ/mol	94.1107 ± 0.0048	40932-22-7*0
Phenol anion		23.1	8.2	± 4.9	kJ/mol	94.1118 ± 0.0048	38752-11-3*0
Dichloromethylene		229.87	231.05	± 0.64	kJ/mol	82.9161 ± 0.0020	1605-72-7*0
Hydrogen chloride			-166.542	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*838
Ethynol cation		1063.8	1061.2	± 2.9	kJ/mol	42.0361 ± 0.0016	84005-02-7*0
Diazenide		175.6	176.7	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*0
2-Propene-1,2-diol		-295.4	-314.4	± 1.2	kJ/mol	74.0785 ± 0.0025	44169-27-9*0
Hydrogen iodide			-51.302	± 0.099	kJ/mol	127.912410 ± 0.000076	10034-85-2*812
Benzaldehyde cation		897.0	880.3	± 1.7	kJ/mol	106.1214 ± 0.0056	80226-59-1*0
Benzaldehyde anion		-55.1	-72.7	± 2.7	kJ/mol	106.1225 ± 0.0056	34473-57-9*0
Tetrafluorohydrazine cation		1129.2	1123.0	± 2.5	kJ/mol	104.00654 ± 0.00014	37366-75-9*0
Carbonylmethyloxonium		561.2	553.0	± 3.0	kJ/mol	59.0435 ± 0.0017	24434-00-2*0
Ammonium hydroxide			-364.34	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*802
Benzoyl anion		70.2	57.6	± 4.0	kJ/mol	105.1145 ± 0.0056	78944-74-8*0
Carbon trianion		1813.2	1818.6	± 5.9	kJ/mol	12.01235 ± 0.00080	50802-48-7*0
Acetic acid			-483.44	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*813
Acetic acid			-483.52	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*814
Methoxyoxomethyl		-152.7	-160.4	± 1.2	kJ/mol	59.0440 ± 0.0017	16481-04-2*0
Ethynol anion		163.5	165.0	± 3.3	kJ/mol	42.0372 ± 0.0016	864971-50-6*0
Methoxyoxomethyl		-151.9	-159.9	± 2.1	kJ/mol	59.0440 ± 0.0017	16481-04-2*3
Dioxymethylene		341.8	339.8	± 3.0	kJ/mol	45.0174 ± 0.0010	438586-67-5*0
Hydrogen bromide			-119.56	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*892
Acetyloxoniumylidene		892.4	883.9	± 2.9	kJ/mol	59.0435 ± 0.0017	67057-47-0*1
Vinylcyclopentadienylium		1076.9	1059.5	± 3.7	kJ/mol	91.1299 ± 0.0056	146893-89-2*0
Acetic acid			-483.60	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*815
m-Tolualdehyde			-125.0	± 1.2	kJ/mol	120.1485 ± 0.0064	620-23-5*500
Hydrogen iodide			-55.695	± 0.095	kJ/mol	127.912410 ± 0.000076	10034-85-2*821
Acetic acid			-483.75	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*816
Hydroperoxonium		762.6	752.7	± 2.0	kJ/mol	35.02207 ± 0.00064	70850-26-9*2
Hydrogen bromide			-119.67	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*829
Fluorosyl fluoride anion		-147.1	-146.8	± 3.0	kJ/mol	53.99675 ± 0.00030	86825-57-20
Isocyanogen chloride cation		1481.0	1482.2	± 3.9	kJ/mol	61.4696 ± 0.0012	956475-91-5*0
Hydrogen bromide			-116.68	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*816
Ammonium hydroxide			-364.92	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*804
1-Hydroxyethenylium		841.7	834.9	± 1.4	kJ/mol	43.0441 ± 0.0016	41084-89-3*0
Hydrogen cyanide anion		129.526	129.047	± 0.087	kJ/mol	27.02593 ± 0.00081	12334-27-9*0
1,3-Butadiyne-1,4-diyl		1083.94	1093.74	± 0.83	kJ/mol	48.0428 ± 0.0032	78015-07-3*2
Hexafluorobenzene cation		13.68	9.89	± 0.87	kJ/mol	186.0541 ± 0.0048	34528-23-9*0
Acetate			-485.10	± 0.27	kJ/mol	59.0446 ± 0.0017	71-50-1*800
Hydrogen bromide			-119.76	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*830
Isocyanogen chloride anion		102.9	107.4	± 3.9	kJ/mol	61.4707 ± 0.0012	923019-39-0*0
Hydrogen fluoride			-321.96	± 0.10	kJ/mol	20.006343 ± 0.000070	7664-39-3*891
Hydrogen chloride			-163.676	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*818
Ethynol		406.4	403.1	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*12
(Formyloxy)methyl		-151.3	-159.4	± 1.1	kJ/mol	59.0440 ± 0.0017	3122-12-1*0
Ammonium hydroxide			-366.32	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*843
Carboxymethyl		-226.6	-236.4	± 1.1	kJ/mol	59.0440 ± 0.0017	2887-46-9*0
Methane anion		27.3	19.4	± 5.1	kJ/mol	16.04301 ± 0.00085	27680-53-1*0
Chlorine pentafluoride anion		-619.1	-622.6	± 4.3	kJ/mol	130.44526 ± 0.00090	184851-42-1*0
Nitrosodioxaziridine		413.7	408.2	± 1.8	kJ/mol	76.01168 ± 0.00091	132871-99-9*0
Cyanogen bromide cation		1331.3	1325.0	± 1.4	kJ/mol	105.9209 ± 0.0013	34749-77-4*0
Cyanomethylium		1256.21	1253.57	± 0.61	kJ/mol	40.0435 ± 0.0016	34430-18-7*0
Methane			-87.699	± 0.061	kJ/mol	16.04246 ± 0.00085	74-82-8*1000
Ethynol		409.3	406.3	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*13
Hydrogen iodide			-55.804	± 0.095	kJ/mol	127.912410 ± 0.000076	10034-85-2*822
2-Methoxy-2-oxoethyl		-202.9	-218.1	± 1.5	kJ/mol	73.0706 ± 0.0025	54668-31-4*0
Hydrogen peroxide			-190.73	± 0.25	kJ/mol	34.01468 ± 0.00062	7722-84-1*800
Tetrafluorohydrazine cation		1146.9	1141.5	± 3.7	kJ/mol	104.00654 ± 0.00014	37366-75-9*2
Ethynol		455.5	452.1	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*14
Ethynol		464.1	460.9	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*15
Formic acid			-425.39	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*855
Hydrogen iodide			-55.854	± 0.095	kJ/mol	127.912410 ± 0.000076	10034-85-2*891
Furaniumyl		836.0	823.2	± 1.3	kJ/mol	68.0734 ± 0.0032	66429-00-3*0
Furan anion		132.1	120.8	± 3.9	kJ/mol	68.0745 ± 0.0032	40807-44-1*0
(Acetyloxy)methyl		-200.1	-213.9	± 1.5	kJ/mol	73.0706 ± 0.0025	2887-49-2*0
Carbon		1114.944	1120.091	± 0.039	kJ/mol	12.01070 ± 0.00080	7440-44-0*3
Pyridiniumyl		1051.31	1035.36	± 0.61	kJ/mol	79.0994 ± 0.0040	16399-94-3*0
Pyridine anion		214.3	200.9	± 3.2	kJ/mol	79.1005 ± 0.0040	12169-63-0*0
2-Propenylidene		417.5	410.6	± 1.5	kJ/mol	40.0639 ± 0.0024	19527-08-3*1
2-Propenylidene		417.5	410.6	± 1.5	kJ/mol	40.0639 ± 0.0024	19527-08-3*0
Chloromethylene		320.35	320.64	± 0.89	kJ/mol	48.4713 ± 0.0012	2108-20-5*0
Bromine atom		162.010	155.947	± 0.055	kJ/mol	79.90400 ± 0.00100	10097-32-2*2
Acetone enol		-151.28	-168.09	± 0.68	kJ/mol	58.0791 ± 0.0025	29456-04-0*0
Acetone enol		-145.2	-162.5	± 1.9	kJ/mol	58.0791 ± 0.0025	29456-04-0*2
Chlorine atom heptacation		39520.	39522.	± 11.	kJ/mol	35.44886 ± 0.00090	22537-27-5*0
Propane		-110.20	-121.18	± 0.66	kJ/mol	44.0956 ± 0.0025	74-98-6*500
Hydrogen iodide			-52.22	± 0.12	kJ/mol	127.912410 ± 0.000076	10034-85-2*813
Hydrogen bromide			-119.87	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*831
2-Hydroxyprop-1-en-1-yl		101.62	90.26	± 0.86	kJ/mol	57.0712 ± 0.0024	1976041-84-5*0
2-Hydroxyprop-1-en-1-yl		106.6	94.6	± 1.9	kJ/mol	57.0712 ± 0.0024	1976041-84-5*12
2-Hydroxyprop-1-en-1-yl		114.0	102.8	± 1.9	kJ/mol	57.0712 ± 0.0024	1976041-84-5*21
2-Hydroxyprop-1-en-1-yl		115.1	104.3	± 1.9	kJ/mol	57.0712 ± 0.0024	1976041-84-5*22
Oxiranylidene		213.5	209.2	± 1.4	kJ/mol	42.0367 ± 0.0016	50983-85-2*0
Hydrogen iodide			-55.963	± 0.099	kJ/mol	127.912410 ± 0.000076	10034-85-2*825
Methylaminyliumyl		1388.2	1381.9	± 2.2	kJ/mol	29.04071 ± 0.00083	56924-51-7*0
Ammonium hydroxide			-365.30	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*806
Hydrogen peroxide cation		897.32	890.31	± 0.51	kJ/mol	34.01413 ± 0.00062	12325-10-9*12
2-Methyliumylidynehydrazin-2-ium-1-ide		1544.1	1542.4	± 1.7	kJ/mol	41.03157 ± 0.00082	947408-73-30
Hydrogen bromide			-117.38	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*817
1-Oxopropyl		-19.1	-30.6	± 1.1	kJ/mol	57.0712 ± 0.0024	15843-24-0*0
Propynylidene		597.8	599.6	± 1.2	kJ/mol	38.0480 ± 0.0024	67152-18-5*2
1,3-Propanediyl		319.2	307.9	± 1.3	kJ/mol	42.0797 ± 0.0024	32458-33-6*0
Formic acid			-425.42	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*861
Hydrogen fluoride			-322.71	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*839
2-Propenylidene		419.1	411.6	± 2.3	kJ/mol	40.0639 ± 0.0024	19527-08-3*12
Methyl nitrite		-52.31	-64.27	± 0.89	kJ/mol	61.0401 ± 0.0010	624-91-9*1
Methyl nitrite			-88.66	± 0.54	kJ/mol	61.0401 ± 0.0010	624-91-9*500
Chlorine atom dianion		406.6	408.2	± 4.8	kJ/mol	35.45380 ± 0.00090	33944-49-9*0
Chlorohydroxymethyl		-54.7	-60.4	± 1.1	kJ/mol	65.4787 ± 0.0012	147139-06-8*0
Ethyl nitrite		-80.1	-98.3	± 1.9	kJ/mol	75.0666 ± 0.0017	109-95-5*2
Ethyl nitrite		-78.0	-97.0	± 1.9	kJ/mol	75.0666 ± 0.0017	109-95-5*3
Hydrogen bromide			-119.93	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*832
Propyl nitrite		-95.8	-119.6	± 1.8	kJ/mol	89.0932 ± 0.0025	543-67-9*0
Propyl nitrite		-95.4	-120.1	± 2.4	kJ/mol	89.0932 ± 0.0025	543-67-9*2
Propyl nitrite		-95.6	-120.1	± 2.4	kJ/mol	89.0932 ± 0.0025	543-67-9*3
Propyl nitrite		-94.8	-119.4	± 2.4	kJ/mol	89.0932 ± 0.0025	543-67-9*4
Propyl nitrite		-94.7	-119.0	± 2.4	kJ/mol	89.0932 ± 0.0025	543-67-9*5
Propyl nitrite		-92.9	-117.8	± 2.4	kJ/mol	89.0932 ± 0.0025	543-67-9*6
Propyl nitrite		-92.6	-117.7	± 2.4	kJ/mol	89.0932 ± 0.0025	543-67-9*7
Propyl nitrite		-91.2	-116.1	± 2.8	kJ/mol	89.0932 ± 0.0025	543-67-9*8
1,2-Dibromoethene		121.5	101.3	± 2.0	kJ/mol	185.8453 ± 0.0026	540-49-8*0
Propargylenide		434.5	437.7	± 1.1	kJ/mol	38.0485 ± 0.0024	82906-05-6*0
Hydrogen chloride			-165.978	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*829
Hydrogen iodide			-52.89	± 0.16	kJ/mol	127.912410 ± 0.000076	10034-85-2*814
Acetic acid			-483.92	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*817
2,2,4-Trimethylpentane		-171.1	-223.5	± 1.5	kJ/mol	114.2285 ± 0.0065	540-84-1*0
Hydrogen iodide			-56.042	± 0.097	kJ/mol	127.912410 ± 0.000076	10034-85-2*828
Hydrogen chloride			-166.886	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*852
Hydrogen bromide			-115.90	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*815
Dioxoethylium		688.6	689.8	± 2.9	kJ/mol	57.0276 ± 0.0017	1994332-01-20
Ethanedial anion		-188.8	-190.3	± 3.1	kJ/mol	57.0287 ± 0.0017	1994332-01-2*0
Chloroethane		-134.35	-135.97	± 0.25	kJ/mol	64.5138 ± 0.0019	75-00-3*500
Water		-286.278	-292.719	± 0.022	kJ/mol	18.01528 ± 0.00033	7732-18-5*509
Acetic acid			-484.11	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*818
Hydrogen chloride			-166.431	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*895
Hydroxyoxoethenylium		866.4	865.2	± 3.5	kJ/mol	57.0276 ± 0.0017	1994332-00-10
Isocyanogen bromide cation		1470.0	1464.2	± 5.9	kJ/mol	105.9209 ± 0.0013	238754-53-5*0
Hypochlorous acid			-110.488	± 0.076	kJ/mol	52.46004 ± 0.00095	7790-92-3*800
Ethynediolide		-132.9	-134.1	± 3.5	kJ/mol	57.0287 ± 0.0017	1994332-00-1*0
1,1-Dibromoethane			-67.0	± 1.3	kJ/mol	187.8612 ± 0.0026	557-91-5*500
Vinylcyclopentadienylium		1099.4	1081.5	± 4.5	kJ/mol	91.1299 ± 0.0056	146893-89-2*1
Methoxyethene		-89.3	-106.6	± 1.1	kJ/mol	58.0791 ± 0.0025	107-25-5*0
Ammonium hydroxide			-365.54	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*808
Hydrogen bromide			-120.44	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*861
3-Buten-2-one		-95.30	-110.84	± 0.85	kJ/mol	70.0898 ± 0.0032	78-94-4*0
Oxide		651.	653.	± 15.	kJ/mol	16.00050 ± 0.00030	16833-27-5*0
3-Buten-2-one		-93.7	-109.8	± 1.6	kJ/mol	70.0898 ± 0.0032	78-94-4*2
1-Hydroxyethenylium		1045.7	1038.7	± 3.4	kJ/mol	43.0441 ± 0.0016	41084-89-3*12
1,3-Butadien-2-ol		-48.0	-64.3	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*12
2-Methanidylidynehydrazin-2-ium-1-ide		281.8	279.1	± 1.4	kJ/mol	41.03267 ± 0.00082	947408-74-40
1,3-Butadien-2-ol		-37.8	-54.2	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*22
2-Methanidylidynehydrazin-2-ium-1-ide		518.6	516.2	± 1.6	kJ/mol	41.03267 ± 0.00082	947408-74-41
1,3-Butadien-2-ol		-42.6	-58.7	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*2
1,3-Butadien-2-ol		-53.3	-68.2	± 1.5	kJ/mol	70.0898 ± 0.0032	59120-04-6*0
Acetic acid			-484.23	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*819
Acetic acid			-484.32	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*820
Hydrogen fluoride			-323.39	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*841
1-Hydroxyethenyl anion		15.1	8.6	± 2.1	kJ/mol	43.0452 ± 0.0016	112539-13-6*0
Methoxyethene		-81.9	-99.0	± 2.4	kJ/mol	58.0791 ± 0.0025	107-25-5*1
Hydrogen chloride			-166.103	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*830
1-Hydroxyethenyl anion		16.5	9.7	± 2.7	kJ/mol	43.0452 ± 0.0016	112539-13-6*21
Hydrogen fluoride			-324.14	± 0.13	kJ/mol	20.006343 ± 0.000070	7664-39-3*843
Acrolein cation		920.00	910.04	± 0.79	kJ/mol	56.0627 ± 0.0024	84005-05-0*0
Acrolein cation		930.8	921.0	± 1.9	kJ/mol	56.0627 ± 0.0024	84005-05-0*2
Acrolein anion		-71.8	-81.3	± 3.1	kJ/mol	56.0638 ± 0.0024	23555-87-5*0
Acrolein anion		-68.0	-78.0	± 3.5	kJ/mol	56.0638 ± 0.0024	23555-87-5*1
2-Methanidylidynehydrazin-2-ium-1-ide		531.6	530.2	± 2.3	kJ/mol	41.03267 ± 0.00082	947408-74-411
Peroxychlorous acid		101.5	95.4	± 3.6	kJ/mol	84.4588 ± 0.0013	177778-92-6*3
Propylidene		349.7	335.9	± 2.0	kJ/mol	42.0797 ± 0.0024	6700-78-3*12
Propadienylidene		678.31	679.29	± 0.41	kJ/mol	38.0480 ± 0.0024	60731-10-4*1
Propyn-1-ol cation		959.9	951.7	± 3.0	kJ/mol	56.0627 ± 0.0024	84005-04-9*0
Acetic acid			-484.43	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*821
2-Methyloxirene		344.0	334.7	± 1.8	kJ/mol	56.0633 ± 0.0024	2835-41-8*1
2-Methyloxirene		346.6	336.7	± 2.5	kJ/mol	56.0633 ± 0.0024	2835-41-8*12
Nitric oxide			79.218	± 0.078	kJ/mol	30.00614 ± 0.00031	10102-43-9*1000
(Methylamino)methyl anion		202.1	185.2	± 3.1	kJ/mol	44.0763 ± 0.0017	31277-25-50
Chlorine trifluoride anion		-480.4	-481.9	± 3.5	kJ/mol	92.44846 ± 0.00090	184289-50-7*0
Ammonium hydroxide			-365.63	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*809
Diiodine cation		963.523	960.408	± 0.018	kJ/mol	253.808391 ± 0.000060	28712-14-3*0
Acryloyl		101.1	96.3	± 1.4	kJ/mol	55.0553 ± 0.0024	72241-20-4*0
Acryloyl		101.1	95.9	± 1.4	kJ/mol	55.0553 ± 0.0024	72241-20-4*1
Acryloyl		109.5	103.8	± 5.7	kJ/mol	55.0553 ± 0.0024	72241-20-4*12
1-Oxo-2-propenylium		772.8	765.9	± 3.0	kJ/mol	55.0548 ± 0.0024	35335-83-2*0
1-Oxo-2-propenylium		1036.1	1030.7	± 3.9	kJ/mol	55.0548 ± 0.0024	35335-83-2*1
1-Oxo-2-propenide		50.7	46.0	± 2.6	kJ/mol	55.0559 ± 0.0024	78944-75-9*0
Hydrogen bromide			-119.97	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*833
Oxoethylidene		261.1	258.3	± 1.1	kJ/mol	42.0367 ± 0.0016	39920-84-8*0
Methyl hydrocarbonate			-629.2	± 1.4	kJ/mol	76.0514 ± 0.0019	7456-87-3*500
1-Formylethenylium		1023.5	1018.0	± 2.3	kJ/mol	55.0548 ± 0.0024	101705-89-9*0
Hydrazoic acid			261.57	± 0.64	kJ/mol	43.02816 ± 0.00022	7782-79-8*500
Peroxyhypochlorous acid cation		1030.4	1024.6	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-20
2-Oxo-1-ethylium-1-yl		1289.4	1286.7	± 2.5	kJ/mol	42.0361 ± 0.0016	214464-96-7*1
Pentachloroethylium		838.1	836.4	± 3.3	kJ/mol	201.2844 ± 0.0048	7094-17-90
3-Oxo-1-propenyl		190.96	185.42	± 0.91	kJ/mol	55.0553 ± 0.0024	206255-29-0*0
Pentachloroethanide		-281.8	-280.3	± 3.9	kJ/mol	201.2854 ± 0.0048	263019-83-6*0
3-Oxo-1-propenyl		191.7	185.9	± 2.1	kJ/mol	55.0553 ± 0.0024	206255-29-0*2
Hydrogen chloride			-166.254	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*831
3-Oxo-1-propenyl		201.4	195.5	± 2.0	kJ/mol	55.0553 ± 0.0024	206255-29-0*22
3-Oxo-1-propenyl		206.1	200.2	± 2.0	kJ/mol	55.0553 ± 0.0024	206255-29-0*12
3-Oxo-1-propenylium		1005.1	1002.8	± 2.4	kJ/mol	55.0548 ± 0.0024	101705-90-2*0
3-Oxo-1-propenylium		1185.6	1180.0	± 3.0	kJ/mol	55.0548 ± 0.0024	101705-90-2*1
Hydroxymethylene cation		971.9	968.3	± 1.4	kJ/mol	30.02543 ± 0.00087	135395-06-1*0
3-Oxo-1-propenylium		1185.6	1179.8	± 3.0	kJ/mol	55.0548 ± 0.0024	101705-90-2*11
3-Oxo-1-propenylium		1197.7	1192.4	± 3.4	kJ/mol	55.0548 ± 0.0024	101705-90-2*12
mu-Oxodioxodinitrogen		984.0	981.0	± 3.2	kJ/mol	76.01113 ± 0.00091	87950-63-8*1
3-Oxo-1-propenylium		1195.7	1189.8	± 3.4	kJ/mol	55.0548 ± 0.0024	101705-90-2*112
3-Oxo-1-propenylium		1205.7	1200.2	± 3.8	kJ/mol	55.0548 ± 0.0024	101705-90-2*122
2-Formylethen-1-ide		27.3	21.3	± 2.5	kJ/mol	55.0559 ± 0.0024	135924-69-5*0
2-Formylethen-1-ide		27.3	20.6	± 2.5	kJ/mol	55.0559 ± 0.0024	135924-69-5*1
2-Formylethen-1-ide		30.5	23.8	± 3.1	kJ/mol	55.0559 ± 0.0024	135924-69-5*2
Trihydrogen		745.878	743.199	± 0.062	kJ/mol	3.02382 ± 0.00021	12184-91-7*0
2-Formylethen-1-ide		54.6	47.9	± 3.1	kJ/mol	55.0559 ± 0.0024	135924-69-5*22
2-Formylethen-1-ide		65.0	58.4	± 3.1	kJ/mol	55.0559 ± 0.0024	135924-69-5*12
Hydrogen iodide			-56.494	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*954
1,2-Propadien-1-one anion		49.8	48.5	± 3.1	kJ/mol	54.0479 ± 0.0024	159171-62-7*0
Peroxyhypochlorous acid anion		-32.2	-33.9	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-30
Acetic acid			-484.51	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*822
Hydroxymethylene anion		147.2	144.2	± 1.6	kJ/mol	30.02653 ± 0.00087	207914-87-2*0
1-Oxo-2-propyn-1-ylium		1001.7	1003.1	± 3.0	kJ/mol	53.0389 ± 0.0024	53474-99-0*0
3-Oxo-1,2-propadien-1-yl anion		179.4	182.0	± 3.2	kJ/mol	53.0400 ± 0.0024	557113-97-0*0
Oxoethylidene anion		86.9	84.2	± 2.1	kJ/mol	42.0372 ± 0.0016	106543-38-8*0
1-Hydroxyethylidene		57.43	47.12	± 0.77	kJ/mol	44.0526 ± 0.0017	30967-49-8*0
Fluorine atom nonacation		262121.1	262122.9	± 1.8	kJ/mol	18.99346598 ± 0.00000050	35424-07-8*0
Formylethynyl anion		100.5	101.8	± 3.4	kJ/mol	53.0400 ± 0.0024	85905-64-2*0
Nitrous acid anion		-105.84	-109.31	± 0.78	kJ/mol	47.01403 ± 0.00061	256393-36-9*0
2-Cyclopropen-1-one cation		1078.8	1075.7	± 2.0	kJ/mol	54.0468 ± 0.0024	100815-68-7*0
Propylidyne		492.7	483.0	± 1.2	kJ/mol	41.0718 ± 0.0024	85056-54-8*0
Dioxodiazoxane		93.0	88.1	± 1.3	kJ/mol	76.01168 ± 0.00091	122413-35-8*0
Propylidene		355.7	340.7	± 2.0	kJ/mol	42.0797 ± 0.0024	6700-78-3*2
Diazomethylium		1395.7	1394.1	± 1.3	kJ/mol	41.03157 ± 0.00082	271249-81-1*0
Ethanimine		55.79	41.16	± 0.72	kJ/mol	43.0678 ± 0.0016	20729-41-3*0
Isourea		-156.1	-172.7	± 2.6	kJ/mol	60.05534 ± 0.00091	4744-36-9*0
1,2-Dichloroethene		3.81	-1.51	± 0.55	kJ/mol	96.9427 ± 0.0024	540-59-0*0
Tetroxidane		-30.97	-41.43	± 0.64	kJ/mol	66.0135 ± 0.0012	29683-94-1*23
Carbamoyl anion		-81.9	-87.8	± 3.1	kJ/mol	44.03327 ± 0.00087	78944-69-1*0
5-Ethenyl-1,3-cyclopentadiene		242.1	220.2	± 2.2	kJ/mol	92.1384 ± 0.0056	29647-85-6*2
Carbamoyl		74.1	68.3	± 2.7	kJ/mol	44.03272 ± 0.00087	2858-51-70
Carbamoyl		76.5	69.9	± 3.2	kJ/mol	44.03272 ± 0.00087	2858-51-72
Carbamoyl		96.4	90.1	± 3.2	kJ/mol	44.03272 ± 0.00087	2858-51-73
Carbamoyl		110.9	104.8	± 3.2	kJ/mol	44.03272 ± 0.00087	2858-51-74
Hydrogen bromide			-118.02	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*818
Ethoxyethene		-117.8	-136.3	± 1.5	kJ/mol	72.1057 ± 0.0033	109-92-2*0
Ethylideneammoniumylidene		1310.0	1300.4	± 3.0	kJ/mol	42.0594 ± 0.0016	91127-36-5*1
(Hydroxyimino)methyl		250.2	244.4	± 1.8	kJ/mol	44.03272 ± 0.00087	206442-92-4*0
Ethylideneazanide		147.8	137.6	± 3.2	kJ/mol	42.0604 ± 0.0016	144810-43-5*0
Acetic acid			-484.54	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*891
(Hydroxyimino)methyl		262.6	257.2	± 2.5	kJ/mol	44.03272 ± 0.00087	206442-92-4*3
(Hydroxyimino)methyl		281.4	276.0	± 2.5	kJ/mol	44.03272 ± 0.00087	206442-92-4*4
Trihydrogen		477.4	474.7	± 2.3	kJ/mol	3.02382 ± 0.00021	12184-91-7*201
Formic acid			-425.36	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*841
Formamide enol		-130.6	-141.7	± 1.4	kJ/mol	45.04066 ± 0.00088	60100-09-6*0
Hypoiodous acid			-116.3	± 5.4	kJ/mol	143.91181 ± 0.00031	14332-21-9*800
Formamide enol		-116.7	-127.7	± 2.2	kJ/mol	45.04066 ± 0.00088	60100-09-6*2
Formamide enol		-115.9	-126.7	± 2.2	kJ/mol	45.04066 ± 0.00088	60100-09-6*3
Formamide enol		-109.8	-120.6	± 2.2	kJ/mol	45.04066 ± 0.00088	60100-09-6*4
5-Ethenyl-1,3-cyclopentadiene		237.1	216.3	± 1.4	kJ/mol	92.1384 ± 0.0056	29647-85-6*0
1-Methylethylidene		316.06	303.16	± 0.97	kJ/mol	42.0797 ± 0.0024	40852-89-9*0
Ammonium hydroxide			-365.76	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*811
Dimethyl carbonate		-537.1	-557.8	± 1.8	kJ/mol	90.0779 ± 0.0026	616-38-6*2
Formaldoxime		30.6	20.0	± 1.3	kJ/mol	45.04066 ± 0.00088	75-17-2*0
Hydrogen fluoride			-323.83	± 0.12	kJ/mol	20.006343 ± 0.000070	7664-39-3*842
Hydrogen fluoride			-321.87	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*819
Cyanogen iodide cation		1271.3	1271.2	± 1.7	kJ/mol	152.92136 ± 0.00080	34749-78-5*0
2-Iminoethyl		219.35	208.67	± 0.86	kJ/mol	42.0599 ± 0.0016	73843-90-0*0
Dichlorovinylidene		424.3	427.6	± 3.0	kJ/mol	94.9268 ± 0.0024	20394-25-6*0
Hydrodioxonitrogen cation		1130.0	1123.4	± 2.9	kJ/mol	47.01293 ± 0.00061	252986-76-8*0
Hydrodioxonitrate		-62.0	-68.4	± 3.1	kJ/mol	47.01403 ± 0.00061	61508-71-2*0
Hydrogen bromide			-120.40	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*852
Chlorovinylidene		429.2	430.9	± 2.9	kJ/mol	60.4820 ± 0.0018	70277-82-6*0
Nitric acid			-206.49	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*855
Hydrogen fluoride			-321.91	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*904
2-Iminoethylium		1108.3	1097.6	± 2.9	kJ/mol	42.0594 ± 0.0016	73843-91-1*0
Hydrogen fluoride			-322.57	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*837
Hydrogen iodide			-56.072	± 0.095	kJ/mol	127.912410 ± 0.000076	10034-85-2*892
Diazene cation		1132.53	1125.87	± 0.64	kJ/mol	30.02881 ± 0.00020	76986-17-9*0
2-Iminoethylium		1148.7	1140.2	± 3.3	kJ/mol	42.0594 ± 0.0016	73843-91-1*1
Hydroperoxyimidogen		111.9	109.0	± 2.8	kJ/mol	47.01348 ± 0.00061	877456-58-1*2
Hydrogen fluoride			-324.43	± 0.14	kJ/mol	20.006343 ± 0.000070	7664-39-3*844
1-Cyanoethylidene		437.6	433.8	± 1.4	kJ/mol	53.0627 ± 0.0024	498544-34-6*0
Hydrogen iodide			-56.134	± 0.097	kJ/mol	127.912410 ± 0.000076	10034-85-2*829
Diazomethyl		467.84	465.28	± 0.68	kJ/mol	41.03212 ± 0.00082	20813-32-5*0
Ethoxyethene		-111.3	-135.2	± 2.3	kJ/mol	72.1057 ± 0.0033	109-92-2*21
Ammonium hydroxide			-365.92	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*813
Dihydroxymethyl		-196.9	-205.2	± 1.1	kJ/mol	47.0333 ± 0.0010	14840-85-8*0
Iodine monochloride		-36.511	-35.537	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*500
Dihydroxymethyl		-190.6	-199.3	± 2.2	kJ/mol	47.0333 ± 0.0010	14840-85-8*2
3-Imino-2-propen-1-ylidene		530.7	526.4	± 1.2	kJ/mol	53.0627 ± 0.0024	916765-05-4*0
Hydrogen chloride			-166.948	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*861
3-Imino-2-propen-1-ylidene		571.8	567.0	± 1.6	kJ/mol	53.0627 ± 0.0024	916765-05-4*2
O--HH Complex		247.7	249.0	± 2.7	kJ/mol	18.01528 ± 0.00033	7732-18-5101
Dihydroxymethyl		-187.8	-196.7	± 2.0	kJ/mol	47.0333 ± 0.0010	14840-85-8*3
Tetraiodomethane			237.	± 11.	kJ/mol	519.62858 ± 0.00081	507-25-5*500
Hydrogen chloride			-165.187	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*822
2-(Methylidyneamino)ethenyl		600.7	596.4	± 1.2	kJ/mol	53.0627 ± 0.0024	123416-74-0*0
Fluoromethane cation		981.81	974.31	± 0.62	kJ/mol	34.03237 ± 0.00083	59122-96-2*0
2-(Methylidyneamino)ethenyl		634.5	630.4	± 1.6	kJ/mol	53.0627 ± 0.0024	123416-74-0*2
Ethane anion		41.8	26.5	± 4.4	kJ/mol	30.0696 ± 0.0017	54064-82-3*0
Dihydroxymethylium		421.5	410.4	± 3.0	kJ/mol	47.0328 ± 0.0010	180071-68-5*0
Dihydroxymethylium		428.5	417.3	± 3.4	kJ/mol	47.0328 ± 0.0010	180071-68-5*3
Fluoromethane			-245.75	± 0.45	kJ/mol	34.03292 ± 0.00083	593-53-3*590
Dihydroxymethylium		439.4	428.2	± 3.4	kJ/mol	47.0328 ± 0.0010	180071-68-5*2
Dihydroxymethanide		-194.2	-202.4	± 1.8	kJ/mol	47.0339 ± 0.0010	61192-32-3*0
Diazirinyl		491.06	487.67	± 0.96	kJ/mol	41.03212 ± 0.00082	69967-71-1*0
Hydrogen iodide			-56.193	± 0.097	kJ/mol	127.912410 ± 0.000076	10034-85-2*830
Hydrogen bromide			-120.00	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*895
Chloromethane		-106.46	-102.50	± 0.17	kJ/mol	50.4872 ± 0.0012	74-87-3*590
Bromomethane cation		996.63	981.72	± 0.20	kJ/mol	94.9380 ± 0.0013	12538-70-4*0
Hydrogen chloride			-166.923	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*855
Cycloprop-2-yliumyl		1225.53	1218.38	± 0.58	kJ/mol	40.0633 ± 0.0024	65812-78-4*0
2-Cyanovinyl		447.83	445.43	± 0.98	kJ/mol	52.0547 ± 0.0024	189141-20-6*0
2-Cyanovinylium		1517.3	1515.2	± 1.8	kJ/mol	52.0542 ± 0.0024	85398-67-0*2
2-Cyanovinyl anion		263.7	261.4	± 1.8	kJ/mol	52.0553 ± 0.0024	85398-67-00
Iodomethane cation		944.76	935.36	± 0.17	kJ/mol	141.93844 ± 0.00083	12538-72-6*0
Hydrazine anion		232.3	218.0	± 4.1	kJ/mol	32.04579 ± 0.00031	65391-88-0*0
2-Isocyanovinyl		543.2	541.8	± 1.7	kJ/mol	52.0547 ± 0.0024	225798-14-1*0
Hydrogen chloride			-166.848	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*850
2-Iminoethyl anion		104.5	94.1	± 2.1	kJ/mol	42.0604 ± 0.0016	73843-87-5*0
Cyanomethyliumyl		1506.4	1507.9	± 2.3	kJ/mol	39.0355 ± 0.0016	34447-38-6*0
Cyanomethylene anion		286.3	286.8	± 1.5	kJ/mol	39.0366 ± 0.0016	12373-24-9*0
Cyanomethylene		479.6	483.0	± 1.1	kJ/mol	39.0361 ± 0.0016	2612-62-6*0
Dihydroxymethanide		-192.0	-201.3	± 2.4	kJ/mol	47.0339 ± 0.0010	61192-32-3*1
Difluoroaminylium		1157.81	1154.93	± 0.71	kJ/mol	52.002998 ± 0.000070	31685-31-1*0
Isocyanomethyliumyl		1506.7	1508.6	± 3.2	kJ/mol	39.0355 ± 0.0016	99045-54-2*0
Isocyanomethylene anion		401.3	402.0	± 2.0	kJ/mol	39.0366 ± 0.0016	144141-01-5*0
Isocyanomethylene		583.1	585.3	± 1.6	kJ/mol	39.0361 ± 0.0016	78694-65-2*0
Dihydroxymethanide		-177.6	-187.5	± 2.4	kJ/mol	47.0339 ± 0.0010	61192-32-3*3
3-Oxo-1,2-propadien-1-ylium-1-yl		1380.4	1385.7	± 3.8	kJ/mol	52.0310 ± 0.0024	151455-13-9*0
3-Oxo-1,2-propadienylidene anion		224.4	230.2	± 3.5	kJ/mol	52.0320 ± 0.0024	109292-50-4*0
Diazirenide		504.8	501.3	± 2.9	kJ/mol	41.03267 ± 0.00082	130614-84-5*1
Hydrogen iodide			-36.91	± 0.56	kJ/mol	127.912410 ± 0.000076	10034-85-2*805
Ethoxyethene		-110.8	-133.0	± 2.6	kJ/mol	72.1057 ± 0.0033	109-92-2*1
Fluoroform			-704.71	± 0.42	kJ/mol	70.01385 ± 0.00080	75-46-7*590
Acetylide		843.0	849.5	± 3.2	kJ/mol	24.0225 ± 0.0016	34846-56-5*0
Ethoxyethene		-108.8	-132.0	± 2.3	kJ/mol	72.1057 ± 0.0033	109-92-2*11
Isoformyl anion		55.7	58.4	± 1.8	kJ/mol	29.01859 ± 0.00086	81747-63-9*0
1-Iminoethyl		233.1	223.0	± 1.1	kJ/mol	42.0599 ± 0.0016	128365-64-0*0
Hydrogen iodide			-47.73	± 0.32	kJ/mol	127.912410 ± 0.000076	10034-85-2*809
Dioxyamidogen		251.1	244.6	± 2.5	kJ/mol	47.01348 ± 0.00061	71843-95-3*1
Hydrogen chloride			-166.681	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*841
1,3-Cyclobutadiene cation		1215.5	1207.2	± 3.0	kJ/mol	52.0740 ± 0.0032	34531-09-4*0
Difluorodioxidanium		1283.7	1280.1	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-00
1-Iminoethyl		252.3	242.4	± 2.0	kJ/mol	42.0599 ± 0.0016	128365-64-0*1
2-Methyl-2-cyclopropen-1-ylidene		448.1	441.9	± 1.2	kJ/mol	52.0746 ± 0.0032	185841-59-2*0
2-Methyl-2-cyclopropen-1-ylidene		670.7	664.7	± 2.8	kJ/mol	52.0746 ± 0.0032	185841-59-2*1
1-Iminoethylium		833.7	823.2	± 3.0	kJ/mol	42.0594 ± 0.0016	128365-64-00
Hydrogen fluoride			-321.99	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*825
1-Iminoethylium		1342.2	1333.3	± 3.9	kJ/mol	42.0594 ± 0.0016	128365-64-01
Hydroxymethoxy		-149.9	-159.8	± 1.8	kJ/mol	47.0333 ± 0.0010	72144-78-6*1
Iodotrifluoromethane cation		412.8	407.5	± 2.6	kJ/mol	195.90983 ± 0.00080	64626-54-6*0
Hydroxymethoxy cation		925.0	915.2	± 3.2	kJ/mol	47.0328 ± 0.0010	180071-69-6*1
Vinylvinylidene		494.2	488.8	± 1.7	kJ/mol	52.0746 ± 0.0032	148759-16-4*0
Vinylvinylidene		690.5	684.7	± 2.6	kJ/mol	52.0746 ± 0.0032	148759-16-4*1
Iodoniumyl		1030.73	1028.56	± 0.11	kJ/mol	127.911861 ± 0.000076	12298-17-8*0
Vinylvinylidene		695.4	689.0	± 3.3	kJ/mol	52.0746 ± 0.0032	148759-16-4*12
Vinylvinylidene cation		1429.9	1424.6	± 2.0	kJ/mol	52.0740 ± 0.0032	161054-20-2*0
Vinylvinylidene cation		1437.9	1432.2	± 2.7	kJ/mol	52.0740 ± 0.0032	161054-20-2*2
Vinylvinylidene anion		405.7	399.0	± 2.0	kJ/mol	52.0751 ± 0.0032	167386-49-4*0
Vinylvinylidene anion		423.2	416.7	± 2.7	kJ/mol	52.0751 ± 0.0032	167386-49-4*2
Hydroxymethoxy cation		930.9	921.4	± 3.7	kJ/mol	47.0328 ± 0.0010	180071-69-6*12
Nitrosyl nitrite anion		-103.0	-106.2	± 2.8	kJ/mol	76.01223 ± 0.00091	122413-35-80
1,2-Butadien-1-ylidene		511.8	506.3	± 2.0	kJ/mol	52.0746 ± 0.0032	119908-55-3*0
1,2-Butadien-1-ylidene		651.7	646.2	± 3.7	kJ/mol	52.0746 ± 0.0032	119908-55-3*1
Hydroxymethoxy cation		933.5	923.8	± 3.7	kJ/mol	47.0328 ± 0.0010	180071-69-6*11
Hydroxymethoxy anion		-373.81	-383.76	± 0.85	kJ/mol	47.0339 ± 0.0010	67899-36-9*0
Hydroxymethoxy anion		-349.1	-358.7	± 1.9	kJ/mol	47.0339 ± 0.0010	67899-36-9*1
Hydrogen iodide			-53.37	± 0.17	kJ/mol	127.912410 ± 0.000076	10034-85-2*815
Acetic acid			-484.67	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*892
1-Iminoethylium		1378.3	1368.8	± 4.3	kJ/mol	42.0594 ± 0.0016	128365-64-011
Hypobromous acid cation		975.25	964.63	± 0.54	kJ/mol	96.9108 ± 0.0010	154804-02-1*0
1-Iminoethanide		185.7	175.6	± 3.2	kJ/mol	42.0604 ± 0.0016	128365-65-10
Trioxodinitrate anion		-104.2	-107.5	± 1.9	kJ/mol	76.01223 ± 0.00091	194856-62-7*0
1,2,3-Butatrien-1-ylium		1271.9	1270.1	± 1.1	kJ/mol	51.0661 ± 0.0032	81932-79-8*0
Hydrogen bromide			-120.04	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*835
Diazomethyl		652.7	649.8	± 1.3	kJ/mol	41.03212 ± 0.00082	20813-32-5*2
1-Iminoethanide		193.2	182.6	± 3.6	kJ/mol	42.0604 ± 0.0016	128365-65-11
Methyl hydrocarbonate		-571.9	-587.2	± 1.9	kJ/mol	76.0514 ± 0.0019	7456-87-3*2
Acetic acid			-484.74	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*830
Ammonium hydroxide			-366.29	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*846
1-Buten-3-yn-1-yl		547.36	544.85	± 0.84	kJ/mol	51.0666 ± 0.0032	2810-61-9*0
1-Buten-3-ynylium		1482.4	1480.3	± 1.4	kJ/mol	51.0661 ± 0.0032	84654-85-3*0
But-1-en-3-yn-1-ide		419.8	419.2	± 1.2	kJ/mol	51.0672 ± 0.0032	119611-65-3*0
Hydrogen bromide			-120.07	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*837
Hydrogen fluoride			-325.42	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*850
Hydrogen fluoride			-322.13	± 0.10	kJ/mol	20.006343 ± 0.000070	7664-39-3*909
Nitrato		1290.59	1285.88	± 0.86	kJ/mol	62.00439 ± 0.00090	133057-96-2*0
Bromoform			8.73	± 0.72	kJ/mol	252.7306 ± 0.0031	75-25-2*590
3-Buten-1-ynylium		1572.7	1570.3	± 1.7	kJ/mol	51.0661 ± 0.0032	103928-84-3*0
But-3-en-1-yn-1-ide		326.8	323.7	± 1.3	kJ/mol	51.0672 ± 0.0032	58870-47-6*0
Hydrogen iodide			-56.273	± 0.092	kJ/mol	127.912410 ± 0.000076	10034-85-2*831
Hydrogen fluoride			-322.08	± 0.10	kJ/mol	20.006343 ± 0.000070	7664-39-3*830
Imidogen		509.34	509.39	± 0.17	kJ/mol	15.014680 ± 0.000099	13774-92-0*2
Ammonium hydroxide			-366.38	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*838
3-Methylene-1-cyclopropen-1-ylium		1398.8	1395.5	± 1.7	kJ/mol	51.0661 ± 0.0032	117469-28-0*0
Dioxohydrazine		192.3	188.7	± 1.8	kJ/mol	60.01228 ± 0.00062	16824-89-8*1
Hydrogen fluoride			-322.17	± 0.10	kJ/mol	20.006343 ± 0.000070	7664-39-3*831
N-Methylenemethaniminium		904.3	893.4	± 3.1	kJ/mol	42.0594 ± 0.0016	88333-01-1*0
2-Cyclopropen-1-ylidenemethylium		1346.5	1343.9	± 1.8	kJ/mol	51.0661 ± 0.0032	112936-36-4*0
Ammonium hydroxide			-366.07	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*816
Diazanide		249.3	239.3	± 3.1	kJ/mol	31.03785 ± 0.00025	25415-88-7*0
N-Methylenemethaniminium		1157.2	1147.3	± 4.0	kJ/mol	42.0594 ± 0.0016	88333-01-1*1
2-Hydroxyethenyl		137.98	132.16	± 0.72	kJ/mol	43.0446 ± 0.0016	108665-16-3*0
1,3-Cyclobutadien-1-ylium		1388.3	1383.4	± 1.8	kJ/mol	51.0661 ± 0.0032	81913-77-1*0
N-Methylidynemethanaminium		881.1	870.2	± 3.0	kJ/mol	42.0594 ± 0.0016	64709-60-0*0
Fluorosyl fluoride cation		1413.1	1413.4	± 3.5	kJ/mol	53.99566 ± 0.00030	86825-50-50
Difluoromethane			-468.92	± 0.37	kJ/mol	52.02339 ± 0.00081	75-10-5*590
Cyclobutenide		320.4	307.9	± 3.2	kJ/mol	53.0830 ± 0.0032	60211-42-9*0
Propylidene		362.8	347.4	± 2.8	kJ/mol	42.0797 ± 0.0024	6700-78-3*22
(Methylimino)methyl		278.0	267.9	± 1.1	kJ/mol	42.0599 ± 0.0016	117928-23-1*0
(Methylimino)methyl		297.1	287.1	± 2.0	kJ/mol	42.0599 ± 0.0016	117928-23-1*2
Chlorous acid cation		996.6	991.6	± 3.1	kJ/mol	68.4589 ± 0.0011	99559-66-70
Phenylperoxy cation		1019.0	1002.0	± 3.1	kJ/mol	109.1022 ± 0.0049	956036-17-2*0
Phenylperoxy anion		-38.8	-55.8	± 3.3	kJ/mol	109.1032 ± 0.0049	956036-17-20
Acetic acid			-484.76	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*831
Ethylperoxy		-6.25	-22.21	± 0.64	kJ/mol	61.0599 ± 0.0017	3170-61-4*0
(Methylimino)methanide		223.0	212.2	± 3.2	kJ/mol	42.0604 ± 0.0016	64709-60-00
Water		-238.622	-241.810	± 0.022	kJ/mol	18.01528 ± 0.00033	7732-18-5*1
Hydrogen chloride			-166.709	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*896
Fulvene cation		1043.6	1027.9	± 2.7	kJ/mol	78.1113 ± 0.0048	34504-75-1*0
Fulvene anion		191.4	176.4	± 4.0	kJ/mol	78.1124 ± 0.0048	34504-63-7*0
Ammonium hydroxide			-366.13	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*817
(Methylimino)methanide		236.6	225.7	± 3.6	kJ/mol	42.0604 ± 0.0016	64709-60-02
cis-1,3,5-Hexatriene		190.6	170.6	± 2.9	kJ/mol	80.1277 ± 0.0048	2612-46-6*0
Ethoxyoxoniumylidene		923.7	911.4	± 1.5	kJ/mol	61.0594 ± 0.0017	268728-77-4*0
Acetic acid			-484.78	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*832
Ethoxyoxoniumylidene		962.4	947.7	± 1.7	kJ/mol	61.0594 ± 0.0017	268728-77-4*2
Hydroperoxonium		738.2	727.9	± 1.2	kJ/mol	35.02207 ± 0.00064	70850-26-9*0
Fulvenone cation		913.5	903.3	± 1.9	kJ/mol	92.0948 ± 0.0048	884319-80-6*0
Hydrogen bromide			-118.36	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*819
Hydrogen iodide			-44.15	± 0.30	kJ/mol	127.912410 ± 0.000076	10034-85-2*807
Acetic acid			-484.79	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*833
Hydrogen fluoride			-321.94	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*906
Silicon atom tetracation		10401.10	10404.08	± 0.56	kJ/mol	28.08331 ± 0.00030	22537-24-2*0
Silicon anion		316.28	319.26	± 0.56	kJ/mol	28.08605 ± 0.00030	14337-02-1*0
Hydrogen fluoride			-326.65	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*852
1-Aminoethenylium		900.0	889.2	± 3.0	kJ/mol	42.0594 ± 0.0016	139597-26-50
Disilicon anion		375.1	379.0	± 1.7	kJ/mol	56.17155 ± 0.00060	64236-73-3*0
Peroxyformic acid		-279.25	-288.39	± 0.63	kJ/mol	62.0248 ± 0.0012	107-32-4*0
1-Aminoethenide		216.0	205.2	± 3.2	kJ/mol	42.0604 ± 0.0016	139597-26-5*0
Chlorine pentafluoride cation		1005.9	996.9	± 3.2	kJ/mol	130.44417 ± 0.00090	478167-78-1*0
Tetroxidane		-31.30	-41.81	± 0.64	kJ/mol	66.0135 ± 0.0012	29683-94-1*22
Ethoxyoxoniumylidene		967.4	951.5	± 2.4	kJ/mol	61.0594 ± 0.0017	268728-77-4*23
Acetic acid			-484.79	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*895
1,2-Butadiene		137.80	138.86	± 0.63	kJ/mol	54.0904 ± 0.0032	590-19-2*500
Hydrogen iodide			-56.319	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*832
Nitrosodioxaziridine		415.3	409.5	± 2.8	kJ/mol	76.01168 ± 0.00091	132871-99-9*3
Formic acid			-425.37	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*844
1,3-Propanediyl		319.2	307.9	± 1.3	kJ/mol	42.0797 ± 0.0024	32458-33-6*1
Ethaneperoxolate		-120.49	-136.55	± 0.72	kJ/mol	61.0604 ± 0.0017	268728-75-2*0
Silicon carbide anion		508.8	513.4	± 4.3	kJ/mol	40.09675 ± 0.00085	86017-99-4*0
Hydrogen iodide			-56.729	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*852
Acetic acid			-484.80	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*834
Silicon carbide		-70.6	-71.6	± 1.5	kJ/mol	40.09620 ± 0.00085	409-21-2*500
Hydrogen iodide			-56.624	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*843
Hydrogen bromide			-118.59	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*820
Acetic acid			-484.80	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*835
Trifluorosilyl anion		-1225.8	-1229.1	± 3.4	kJ/mol	85.08126 ± 0.00030	54711-93-2*0
Ethaneperoxolate		-119.9	-135.6	± 1.9	kJ/mol	61.0604 ± 0.0017	268728-75-2*1
Hydrogen bromide			-120.36	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*850
Difluorosilylene anion		-652.8	-653.1	± 3.4	kJ/mol	66.08285 ± 0.00030	145089-80-1*0
Difluorosilylene		-629.1	-630.0	± 1.3	kJ/mol	66.08231 ± 0.00030	13966-66-0*0
Difluorosilylene		-314.3	-314.9	± 1.3	kJ/mol	66.08231 ± 0.00030	13966-66-0*1
Chlorous acid anion		-154.3	-156.1	± 3.3	kJ/mol	68.4600 ± 0.0011	99559-66-7*0
Hypoiodous acid cation		891.4	886.6	± 3.3	kJ/mol	143.91126 ± 0.00031	193098-20-3*0
Methylaminyliumyl		1423.0	1416.0	± 2.2	kJ/mol	29.04071 ± 0.00083	56924-51-7*2
Diazene cation		1132.53	1125.60	± 0.64	kJ/mol	30.02881 ± 0.00020	76986-17-9*1
Fluorosilylidyne		297.19	298.41	± 0.62	kJ/mol	47.08390 ± 0.00030	11128-24-8*2
Tetrafluorohydrazine anion		-184.5	-190.0	± 3.3	kJ/mol	104.00764 ± 0.00014	39775-43-4*2
Hydrogen fluoride			-321.78	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*817
Acetic acid			-484.80	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*837
2-Aminoethenyl		319.8	310.2	± 1.3	kJ/mol	42.0599 ± 0.0016	176964-54-8*0
2-Aminoethenylium		1110.6	1099.8	± 2.4	kJ/mol	42.0594 ± 0.0016	64724-21-6*1
2-Butynylium		1085.9	1077.6	± 1.3	kJ/mol	53.0820 ± 0.0032	64235-83-2*0
Trioxygen difluoride		113.6	107.8	± 2.0	kJ/mol	85.99501 ± 0.00090	16829-28-0*2
Hydrogen iodide			-56.465	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*839
1-Hydroperoxyethylium		690.5	675.6	± 1.5	kJ/mol	61.0594 ± 0.0017	126898-98-40
Silylene		271.60	269.94	± 0.81	kJ/mol	30.10138 ± 0.00033	13825-90-6*0
Acetic acid			-484.81	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*838
2-Aminoethenyl anion		230.2	219.4	± 2.6	kJ/mol	42.0604 ± 0.0016	64724-21-60
Nitric acid			-193.75	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*803
Disilane cation		1030.2	1017.4	± 2.2	kJ/mol	62.21809 ± 0.00073	96301-43-8*0
Hydrogen chloride			-166.739	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*842
Hydrogen fluoride			-322.50	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*835
Diazene		207.17	200.03	± 0.40	kJ/mol	30.02936 ± 0.00020	3618-05-1*0
Acetic acid			-484.81	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*839
1-Hydroperoxyethylium		841.4	830.1	± 1.7	kJ/mol	61.0594 ± 0.0017	126898-98-41
Chlorine atom		130.176	131.783	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*2
1-Hydroperoxyethylium		691.8	676.1	± 2.3	kJ/mol	61.0594 ± 0.0017	126898-98-422
2-(Cyclopenta-2,4-dien-1-ylidene)ethan-1-ide		132.5	114.4	± 3.4	kJ/mol	91.1310 ± 0.0056	405519-46-2*0
Disilene		288.8	280.2	± 1.7	kJ/mol	60.20276 ± 0.00066	15435-77-5*0
1-Hydroperoxyethylium		843.6	831.6	± 2.6	kJ/mol	61.0594 ± 0.0017	126898-98-412
Ammonium hydroxide			-366.25	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*819
Cyanic fluoride cation		1294.2	1294.6	± 1.1	kJ/mol	45.01529 ± 0.00080	62532-69-8*0
Acetic acid			-484.82	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*841
Silylsilylene		317.3	309.5	± 1.9	kJ/mol	60.20276 ± 0.00066	50420-90-1*0
Fluorosyl fluoride		192.8	193.3	± 2.3	kJ/mol	53.99621 ± 0.00030	86825-57-2*0
Acetic acid			-484.70	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*844
Hydrogen peroxide cation		897.29	890.31	± 0.51	kJ/mol	34.01413 ± 0.00062	12325-10-9*0
1-Methylene-2-propenylium		1059.5	1049.3	± 1.7	kJ/mol	53.0820 ± 0.0032	62698-26-4*0
Ethylimidogen anion		277.3	263.4	± 3.6	kJ/mol	43.0684 ± 0.0016	82539-33-1*0
2-Hydroperoxyethyl		64.6	51.2	± 1.3	kJ/mol	61.0599 ± 0.0017	126898-97-3*0
Hydrogen iodide			-56.599	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*842
Di-mu-hydrodihydrodisilicon		374.8	364.5	± 2.3	kJ/mol	60.20276 ± 0.00066	129970-82-7*0
Di-mu-hydrodihydrodisilicon		374.8	364.4	± 2.3	kJ/mol	60.20276 ± 0.00066	129970-82-7*1
Di-mu-hydrodihydrodisilicon		544.3	536.2	± 3.6	kJ/mol	60.20276 ± 0.00066	129970-82-7*11
Di-mu-hydrodihydrodisilicon cation		1180.3	1172.7	± 3.2	kJ/mol	60.20221 ± 0.00066	129970-82-70
Di-mu-hydrodihydrodisilicon anion		288.5	280.4	± 3.3	kJ/mol	60.20331 ± 0.00066	129970-83-80
2-Hydroperoxyethyl		64.6	50.8	± 1.3	kJ/mol	61.0599 ± 0.0017	126898-97-3*3
Acetic acid			-484.84	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*850
Hydrogen bromide			-120.09	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*838
Hydrogen chloride			-166.753	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*899
2-Hydroperoxyethyl		65.1	51.6	± 2.2	kJ/mol	61.0599 ± 0.0017	126898-97-3*1
Hydrogen fluoride			-321.92	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*890
Hydrogen bromide			-118.91	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*821
Ethylene anion		232.0	225.6	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*0
2-Hydroperoxyethyl		65.5	51.5	± 2.2	kJ/mol	61.0599 ± 0.0017	126898-97-3*31
Tetraoxidanyl		76.7	69.5	± 6.1	kJ/mol	65.0055 ± 0.0012	69696-93-1*1
Hydrogen bromide			-120.11	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*839
2-Hydroperoxyethyl		65.6	51.9	± 2.2	kJ/mol	61.0599 ± 0.0017	126898-97-3*12
Ammonium hydroxide			-366.26	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*820
Ethenyldioxy		118.7	109.8	± 1.3	kJ/mol	59.0440 ± 0.0017	88181-72-0*0
Ammonium hydroxide			-366.31	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*821
Ethylimidogen cation		1394.6	1381.3	± 3.6	kJ/mol	43.0673 ± 0.0016	82539-33-11
Hypochloroperoxoous acid, hydroxy ester		48.4	41.6	± 1.8	kJ/mol	84.4588 ± 0.0013	928652-99-7*0
Perchloric acid cation		1190.2	1180.6	± 3.3	kJ/mol	100.4577 ± 0.0015	91712-47-9*0
Hydrogen bromide			-120.17	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*840
Nitric acid			-200.30	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*807
Nitrilomethylimidogen		581.6	578.4	± 1.5	kJ/mol	41.03212 ± 0.00082	324529-58-0*0
Hydrogen iodide			-56.519	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*840
Hydrogen chloride			-166.764	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*843
Acetic acid			-484.85	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*852
Hydrogen iodide			-56.356	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*833
Hydrogen bromide			-120.21	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*841
Iminomethylimidogen anion		401.9	400.0	± 2.3	kJ/mol	41.03267 ± 0.00082	150296-30-3*0
Acetic acid			-484.86	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*855
Hydroxysilyl anion		-219.2	-227.0	± 2.1	kJ/mol	47.10927 ± 0.00047	78450-47-2*0
Hydroxysilyl anion		-218.9	-226.8	± 2.7	kJ/mol	47.10927 ± 0.00047	78450-47-2*2
Hydrogen bromide			-120.24	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*898
Nitrosodioxaziridine		413.9	408.1	± 3.2	kJ/mol	76.01168 ± 0.00091	132871-99-9*2
Ammonium hydroxide			-366.33	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*891
Nitric acid			-201.96	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*809
Benzvalene cation		1200.2	1184.8	± 2.7	kJ/mol	78.1113 ± 0.0048	81050-63-7*0
1-Aziridinylium		1265.9	1254.2	± 3.1	kJ/mol	42.0594 ± 0.0016	91127-35-4*1
Ethenyldioxy		122.9	113.1	± 2.2	kJ/mol	59.0440 ± 0.0017	88181-72-0*2
1-Aziridinide		244.1	231.8	± 3.3	kJ/mol	42.0604 ± 0.0016	1358579-49-3*0
Nitrous oxide			61.42	± 0.11	kJ/mol	44.01288 ± 0.00033	10024-97-2*1000
Acetic acid			-484.87	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*861
Oxiranylium		901.3	893.3	± 1.4	kJ/mol	43.0441 ± 0.0016	57789-76-1*0
Hydrogen bromide			-119.11	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*822
Hydrogen iodide			-56.578	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*898
Ammonium hydroxide			-366.35	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*825
2-Methyl-2-propanol		-341.1	-365.6	± 1.9	kJ/mol	74.1216 ± 0.0033	75-65-0*500
Nitric acid			-206.30	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*841
Butadienylacetylene		358.9	346.4	± 1.9	kJ/mol	78.1118 ± 0.0048	10420-90-3*0
Hydrogen chloride			-164.170	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*819
(3Z)-1,3-Hexadien-5-yne	$C=C/C=C\C#C$	358.9	346.3	± 2.5	kJ/mol	78.1118 ± 0.0048	5222-76-4*0
Divinylacetylene		361.9	350.7	± 1.9	kJ/mol	78.1118 ± 0.0048	821-08-9*0
1,2-Butadienylium		1099.2	1089.9	± 1.2	kJ/mol	53.0820 ± 0.0032	65114-67-20
Divinylacetylene		362.5	351.4	± 2.6	kJ/mol	78.1118 ± 0.0048	821-08-9*1
Biallenyl		410.6	399.6	± 1.5	kJ/mol	78.1118 ± 0.0048	29776-96-3*0
2-Aziridinyl		360.9	349.5	± 1.7	kJ/mol	42.0599 ± 0.0016	23838-09-70
Biallenyl		419.5	408.2	± 2.2	kJ/mol	78.1118 ± 0.0048	29776-96-3*2
Propargylallene		431.4	420.0	± 1.4	kJ/mol	78.1118 ± 0.0048	33142-15-3*0
2-Aziridinylium		1010.9	998.9	± 3.3	kJ/mol	42.0594 ± 0.0016	91127-35-40
Propargylallene		432.3	420.7	± 2.2	kJ/mol	78.1118 ± 0.0048	33142-15-3*2
Diazene anion		265.6	258.8	± 2.0	kJ/mol	30.02991 ± 0.00020	100429-75-2*0
Hydrogen isocyanide anion		191.61	191.80	± 0.32	kJ/mol	27.02593 ± 0.00081	96913-22-3*0
3-Methylene-1-penten-4-yne		362.7	350.3	± 2.2	kJ/mol	78.1118 ± 0.0048	6929-96-0*0
3-Methylene-1-penten-4-yne		374.8	362.5	± 2.8	kJ/mol	78.1118 ± 0.0048	6929-96-0*3
1,2,3,5-Hexatetraene		391.8	380.4	± 1.6	kJ/mol	78.1118 ± 0.0048	60239-33-0*0
Ammonium hydroxide			-366.37	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*840
1,2,3,5-Hexatetraene		400.6	389.0	± 2.3	kJ/mol	78.1118 ± 0.0048	60239-33-0*2
2-Aziridinylium		1304.9	1293.2	± 4.1	kJ/mol	42.0594 ± 0.0016	91127-35-41
Methoxymethylene		129.23	118.73	± 0.78	kJ/mol	44.0526 ± 0.0017	19527-10-7*2
Oxiranyl anion		121.3	113.4	± 1.5	kJ/mol	43.0452 ± 0.0016	72722-59-9*0
Hydrogen fluoride			-322.64	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*838
Water		-286.278	-285.806	± 0.022	kJ/mol	18.01528 ± 0.00033	7732-18-5*499
Hydrogen iodide			-56.553	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*841
Hydrogen iodide			-56.779	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*861
Ammonium hydroxide			-366.38	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*830
Ammonium hydroxide			-366.39	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*831
Peroxyformyl		-100.43	-105.53	± 0.67	kJ/mol	61.0168 ± 0.0012	56240-83-6*0
Nitrosyl nitrate		48.3	40.4	± 1.8	kJ/mol	92.0111 ± 0.0012	15969-55-8*0
2-Aziridinylium		1334.9	1323.9	± 4.8	kJ/mol	42.0594 ± 0.0016	91127-35-411
Peroxyformate		-340.95	-346.40	± 0.80	kJ/mol	61.0174 ± 0.0012	104960-05-6*0
1-Methylallyl		152.66	136.19	± 0.79	kJ/mol	55.0984 ± 0.0032	15819-46-2*0
2-Aziridinide		316.2	304.1	± 3.4	kJ/mol	42.0604 ± 0.0016	111127-93-6*0
Hydrogen chloride			-165.294	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*891
1-Methyl-1-propenyl		240.11	224.72	± 0.66	kJ/mol	55.0984 ± 0.0032	71790-71-1*0
Ethylidene		361.28	354.30	± 0.48	kJ/mol	28.0532 ± 0.0016	4218-50-2*0
1-Methyl-1-propenyl		243.4	227.1	± 1.9	kJ/mol	55.0984 ± 0.0032	71790-71-1*2
Hydrogen iodide			-56.377	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*895
Formic acid cation		721.95	715.42	± 0.25	kJ/mol	46.0248 ± 0.0010	50614-05-6*0
1-Butenyl		263.46	246.40	± 0.68	kJ/mol	55.0984 ± 0.0032	2669-61-6*0
Peroxychlorous acid		95.4	89.8	± 2.0	kJ/mol	84.4588 ± 0.0013	177778-92-6*0
1-Butenyl		263.9	246.6	± 1.9	kJ/mol	55.0984 ± 0.0032	2669-61-6*3
Nitric acid			-203.79	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*812
1-Ethynyl-2-propyn-1-ylium-1-yl		1537.2	1540.8	± 2.6	kJ/mol	62.0688 ± 0.0040	217822-76-9*0
1-Ethynyl-2-propyn-1-ylidene anion		584.2	589.3	± 3.5	kJ/mol	62.0699 ± 0.0040	217822-70-3*0
1-Ethynyl-2-propyn-1-ylidene		727.0	734.1	± 1.7	kJ/mol	62.0694 ± 0.0040	882068-94-2*0
1-Ethynyl-2-propyn-1-ylidene		787.5	792.9	± 2.1	kJ/mol	62.0694 ± 0.0040	882068-94-2*2
2-Aziridinide		330.1	318.1	± 4.0	kJ/mol	42.0604 ± 0.0016	111127-93-6*1
Dinitrogen anion		192.5	192.5	± 1.7	kJ/mol	28.01403 ± 0.00014	12185-02-3*0
Hydrogen fluoride			-330.12	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*861
Isocyanic acid anion		-54.2	-57.4	± 3.0	kJ/mol	43.02533 ± 0.00086	444010-28-00
1,2-Pentadien-4-ynylidene		791.3	794.0	± 2.4	kJ/mol	62.0694 ± 0.0040	195524-67-5*0
2-Cyclopropen-1-ylideneethenylidene		807.2	808.8	± 3.4	kJ/mol	62.0694 ± 0.0040	195524-69-7*0
Nitrogen atom heptacation		143853.27	143855.13	± 0.23	kJ/mol	14.002900 ± 0.000070	40549-08-4*0
Nitric acid			-205.01	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*815
Hydrogen iodide			-56.390	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*834
Trihydrogen cation		1110.577	1106.695	± 0.013	kJ/mol	3.02327 ± 0.00021	28132-48-1*1
Water anion		-50.1	-53.0	± 4.3	kJ/mol	18.01583 ± 0.00033	12259-30-2*0
1,3-Propanediyl		337.7	323.0	± 2.2	kJ/mol	42.0797 ± 0.0024	32458-33-6*2
Hydrogen bromide			-102.21	± 0.13	kJ/mol	80.9119 ± 0.0010	10035-10-6*805
Nitric acid			-205.70	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*817
2,4-Pentadiynylium		1362.5	1362.6	± 2.6	kJ/mol	63.0768 ± 0.0040	103928-86-5*0
Pentatetraen-1-ide		433.4	433.9	± 3.4	kJ/mol	63.0779 ± 0.0040	849427-36-7*0
1-Ethynyl-2-propynylium		1379.9	1378.7	± 2.6	kJ/mol	63.0768 ± 0.0040	79530-50-0*0
Hydrogen bromide			-120.24	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*957
Penta-1,4-diyn-3-ide		443.9	443.2	± 3.2	kJ/mol	63.0779 ± 0.0040	553662-77-4*0
Penta-1,4-diyn-3-ide		443.9	443.2	± 3.6	kJ/mol	63.0779 ± 0.0040	553662-77-4*2
(Dimethylamino)methyl anion		190.8	166.6	± 3.3	kJ/mol	58.1029 ± 0.0025	125231-49-4*0
Ethylamine			-76.82	± 0.67	kJ/mol	45.0837 ± 0.0017	75-04-7*500
Hydrogen bromide			-120.29	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*843
Methoxymethylene		129.23	118.73	± 0.78	kJ/mol	44.0526 ± 0.0017	19527-10-7*0
Water dimer cation		557.2	546.8	± 3.0	kJ/mol	36.03001 ± 0.00066	158061-35-9*0
Ammonium hydroxide			-366.39	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*832
Cyanic acid cation		1135.7	1133.2	± 2.9	kJ/mol	43.02423 ± 0.00086	59780-31-3*0
1-Aminoethyl anion		174.5	157.0	± 3.2	kJ/mol	44.0763 ± 0.0017	59263-55-7*0
Cyanic acid anion		-9.2	-9.6	± 3.1	kJ/mol	43.02533 ± 0.00086	58199-47-6*0
Formic acid anion		-256.2	-262.3	± 1.8	kJ/mol	46.0259 ± 0.0010	19066-82-1*0
Ethylaminylium		1092.4	1077.3	± 2.4	kJ/mol	44.0752 ± 0.0017	54387-08-5*1
Ethylaminylium		1094.9	1079.1	± 2.9	kJ/mol	44.0752 ± 0.0017	54387-08-5*12
Hydrogen iodide			-56.411	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*835
Cyanogen		273.93	289.18	± 0.41	kJ/mol	52.0349 ± 0.0016	460-19-5*500
Diiodine			23.243	± 0.082	kJ/mol	253.808940 ± 0.000060	7553-56-2*1000
1,2-Difluoroethene		-302.99	-309.08	± 0.83	kJ/mol	64.0341 ± 0.0016	1691-13-0*0
N-Methylethanamine			-74.9	± 2.3	kJ/mol	59.1103 ± 0.0025	624-78-2*500
Isocyanogen anion		386.6	388.7	± 3.3	kJ/mol	52.0354 ± 0.0016	83951-85-30
2-Hydroxyethyl		-12.90	-26.16	± 0.48	kJ/mol	45.0605 ± 0.0017	4422-54-2*0
Oxoiodonium		1065.2	1063.2	± 1.5	kJ/mol	142.90332 ± 0.00030	81182-81-2*0
2-Methyl-2-propanamine			-150.61	± 0.53	kJ/mol	73.1369 ± 0.0033	75-64-9*590
1H-Diazirin-3-ylium		1527.2	1523.7	± 2.0	kJ/mol	41.03157 ± 0.00082	735234-64-7*0
Formate			-425.47	± 0.45	kJ/mol	45.0180 ± 0.0010	71-47-6*800
1H-diazirin-3-ide		379.8	376.6	± 2.0	kJ/mol	41.03267 ± 0.00082	735234-64-70
Naphtalene cation		956.92	933.85	± 0.55	kJ/mol	128.1700 ± 0.0080	34512-27-1*0
Naphtalene anion		187.6	164.7	± 3.0	kJ/mol	128.1711 ± 0.0080	34509-91-6*0
Hydrogen bromide			-71.67	± 0.13	kJ/mol	80.9119 ± 0.0010	10035-10-6*801
Nitric acid			-205.93	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*818
Dichlorine cation		1108.307	1108.286	± 0.0062	kJ/mol	70.9049 ± 0.0018	12595-90-3*0
Nitric acid			-206.01	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*819
Difluorovinylidene anion		-88.3	-87.1	± 2.3	kJ/mol	62.0188 ± 0.0016	107693-92-5*0
Ammonium hydroxide			-366.38	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*895
Ammonium hydroxide			-366.38	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*834
Cyanic fluoride anion		-20.7	-18.7	± 2.9	kJ/mol	45.01639 ± 0.00080	34507-50-1*0
Formic acid			-424.94	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*924
Dibromovinylidene		510.6	499.5	± 4.1	kJ/mol	183.8294 ± 0.0026	261771-36-2*0
Formic acid			-425.16	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*923
Formic acid			-425.43	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*801
Formic acid			-425.53	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*802
Ammonium hydroxide			-366.38	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*835
1,3-Butadienyl		372.28	363.06	± 0.87	kJ/mol	53.0825 ± 0.0032	86181-68-2*0
Diisocyanogen anion		456.8	462.5	± 3.6	kJ/mol	52.0354 ± 0.0016	78800-22-30
Fluorovinylidene		298.9	300.1	± 3.1	kJ/mol	44.0277 ± 0.0016	70302-00-0*0
Diisocyanogen cation		1825.3	1828.5	± 3.2	kJ/mol	52.0343 ± 0.0016	78800-21-20
1,3-Butadienyl		374.9	364.5	± 1.9	kJ/mol	53.0825 ± 0.0032	86181-68-2*12
Formic acid			-425.50	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*803
Cyclopropane		41.48	35.79	± 0.47	kJ/mol	42.0797 ± 0.0024	75-19-4*500
Benzophenone			-24.8	± 1.5	kJ/mol	182.2179 ± 0.0104	119-61-9*590
1,1-Ethenediol		-307.56	-320.09	± 0.83	kJ/mol	60.0520 ± 0.0017	10375-04-9*0
Hydrogen chloride			-162.011	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*816
Butadiynylium		1781.3	1787.8	± 3.2	kJ/mol	49.0502 ± 0.0032	76108-67-3*0
Nitric acid			-206.38	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*844
1,1-Ethenediol		-302.3	-315.7	± 1.9	kJ/mol	60.0520 ± 0.0017	10375-04-9*2
Formic acid			-425.46	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*804
Formic acid			-425.42	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*805
Nitric acid			-206.03	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*820
Diazoethenylidene cation		1771.1	1773.1	± 3.5	kJ/mol	52.0343 ± 0.0016	130760-10-00
Helium		-0.000	-0.000	± 0.000	kJ/mol	4.0026020 ± 0.0000020	7440-59-7*2
1,3-Butadienyl		384.1	374.5	± 1.9	kJ/mol	53.0825 ± 0.0032	86181-68-2*21
1,3-Butadienyl		385.6	375.4	± 1.9	kJ/mol	53.0825 ± 0.0032	86181-68-2*22
Helium dication		7622.839	7622.839	± 0.000	kJ/mol	4.0015048 ± 0.0000020	12587-46-1*0
Bromovinylidene		466.4	460.4	± 3.8	kJ/mol	104.9333 ± 0.0019	161957-27-3*0
Ketene		-45.22	-48.40	± 0.11	kJ/mol	42.0367 ± 0.0016	463-51-4*22
Diazoethenylidene anion		529.6	532.2	± 3.5	kJ/mol	52.0354 ± 0.0016	130760-11-10
Difluorophosgene anion		-602.3	-604.2	± 3.3	kJ/mol	66.00745 ± 0.00085	474815-26-4*0
Hydroxyamidogen		101.26	94.43	± 0.84	kJ/mol	32.02202 ± 0.00034	13940-32-4*0
Dihelium		1761.349	1757.613	± 0.018	kJ/mol	8.0052040 ± 0.0000040	12184-98-4*2
Hydrogen chloride			-162.856	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*817
Hydrohelate		143.256	139.027	± 0.0021	kJ/mol	5.011091 ± 0.000070	12325-01-8*0
1,1-Ethenediol		-296.0	-309.2	± 1.9	kJ/mol	60.0520 ± 0.0017	10375-04-9*3
3H-diazirin-3-ylidene-methylene		837.3	839.9	± 2.3	kJ/mol	52.0349 ± 0.0016	204253-88-3*0
Fluoro(fluorooxy)methylene		-134.8	-136.0	± 1.3	kJ/mol	66.00691 ± 0.00085	479587-30-9*0
Hydrogen bromide			-119.19	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*891
Nitric acid			-206.42	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*850
Hydrogen chloride			-164.927	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*821
Hydrogen iodide			-54.02	± 0.17	kJ/mol	127.912410 ± 0.000076	10034-85-2*816
Hydrogen iodide			-49.963	± 0.095	kJ/mol	127.912410 ± 0.000076	10034-85-2*811
Diazomethyl		653.0	650.0	± 2.3	kJ/mol	41.03212 ± 0.00082	20813-32-5*21
1-Propen-1-yl-3-ylidene		656.7	653.3	± 1.1	kJ/mol	39.0559 ± 0.0024	84654-90-0*0
Isocyanic fluoride cation		1618.0	1618.6	± 4.0	kJ/mol	45.01529 ± 0.00080	16992-26-00
Phosgene cation		897.0	896.0	± 1.7	kJ/mol	98.9150 ± 0.0020	73249-38-4*0
Phosgene			-242.78	± 0.25	kJ/mol	98.9155 ± 0.0020	75-44-5*501
Neon decacation		338828.3	338828.3	± 1.4	kJ/mol	20.17421 ± 0.00060	32218-07-8*0
Neon hydride		215.989	211.755	± 0.024	kJ/mol	21.18764 ± 0.00060	17438-52-7*0
1,3-Butadienylium		1133.7	1123.7	± 2.5	kJ/mol	53.0820 ± 0.0032	86181-69-3*0
Hydroneonate		143.096	142.084	± 0.035	kJ/mol	21.18819 ± 0.00060	75514-98-6*0
Phosgene		-255.48	-242.78	± 0.25	kJ/mol	98.9155 ± 0.0020	75-44-5*502
Diatomic bromine cation		1060.34	1045.39	± 0.23	kJ/mol	159.8075 ± 0.0020	12595-71-0*0
Formic acid			-425.36	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*807
Chloro(chlorooxy)methylene		73.5	73.9	± 3.6	kJ/mol	98.9155 ± 0.0020	479587-31-0*0
Krypton dication		3701.124	3701.124	± 0.013	kJ/mol	83.7989 ± 0.1000	18469-91-5*0
Fluoronitrate		211.3	211.5	± 2.8	kJ/mol	33.005692 ± 0.000070	33088-90-3*0
Xenon dication		3194.14	3194.14	± 0.36	kJ/mol	131.2889 ± 0.0200	14066-95-6*0
Formic acid			-425.30	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*809
Ethenol		-113.32	-123.67	± 0.38	kJ/mol	44.0526 ± 0.0017	557-75-5*0
Vinyl alcohol cation		778.6	767.7	± 1.3	kJ/mol	44.0520 ± 0.0017	57239-63-1*0
Trichlorine cation		1196.6	1197.2	± 3.2	kJ/mol	106.3576 ± 0.0027	33088-85-6*1
Chloro(chlorooxy)methylene		98.	105.	± 15.	kJ/mol	98.9155 ± 0.0020	479587-31-0*1
Glycolaldehyde		-304.31	-317.35	± 0.89	kJ/mol	60.0520 ± 0.0017	141-46-8*0
Acetic acid			-484.79	± 0.27	kJ/mol	60.0520 ± 0.0017	64-19-7*1000
Hydrogen iodide			-54.586	± 0.092	kJ/mol	127.912410 ± 0.000076	10034-85-2*817
Sulfur atom hexacation		26947.2	26949.0	± 3.4	kJ/mol	32.0627 ± 0.0060	22537-26-4*0
Oxooxoniumylmethoxy		1178.0	1177.3	± 5.7	kJ/mol	60.0084 ± 0.0012	952586-28-6*0
Sulfur atom dianion		454.0	455.8	± 3.2	kJ/mol	32.0671 ± 0.0060	18496-25-8*0
Formic acid			-425.26	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*811
Hydrazoic acid anion		309.1	303.2	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*0
Disulfur anion		-34.06	-33.12	± 0.52	kJ/mol	64.1325 ± 0.0120	12185-15-8*0
Tetraoxidanyl		2.1	0.4	± 2.9	kJ/mol	65.0055 ± 0.0012	69696-93-1*0
Hydrogen iodide			-56.666	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*846
Sulfonyl cation		897.01	894.74	± 0.13	kJ/mol	64.0643 ± 0.0060	12439-77-9*0
Sulfur dioxide		-331.5	-320.1	± 1.9	kJ/mol	64.0648 ± 0.0060	7446-09-5*500
Formic acid			-425.23	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*812
Iminomethyl		275.79	272.19	± 0.56	kJ/mol	28.03332 ± 0.00082	15691-95-9*0
Nitric acid			-206.05	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*822
Formic acid			-425.21	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*813
Oxosulfate		-102.66	-101.89	± 0.50	kJ/mol	48.0659 ± 0.0060	12269-52-2*0
Trioxidane		-81.76	-90.36	± 0.40	kJ/mol	50.01408 ± 0.00091	14699-99-1*0
Sulfur trioxide cation		847.65	844.74	± 0.68	kJ/mol	80.0637 ± 0.0061	12710-95-1*0
Ammonium hydroxide			-366.38	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*836
Sulfite		-273.7	-279.3	± 4.2	kJ/mol	80.0653 ± 0.0061	14265-45-3*0
Hydrogen fluoride			-322.12	± 0.10	kJ/mol	20.006343 ± 0.000070	7664-39-3*908
Chlorohydroxymethylene		14.4	11.5	± 3.2	kJ/mol	64.4707 ± 0.0012	147723-60-2*2
Sulfur oxide peroxide		-26.0	-30.2	± 2.3	kJ/mol	80.0642 ± 0.0061	175799-68-5*0
Formic acid			-425.20	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*814
Sulfur oxide peroxide		-3.4	-7.1	± 3.0	kJ/mol	80.0642 ± 0.0061	175799-68-5*1
Chlorohydroxymethylene		14.0	11.3	± 2.5	kJ/mol	64.4707 ± 0.0012	147723-60-2*0
Methanediimine cation		1137.8	1135.7	± 2.2	kJ/mol	42.03951 ± 0.00082	1189338-16-6*0
Sulfuryl dichloride cation		814.1	809.8	± 3.2	kJ/mol	134.9697 ± 0.0063	7791-25-50
Dichlorodioxosulfate		-604.8	-607.4	± 3.5	kJ/mol	134.9707 ± 0.0063	12599-04-1*0
Formic acid			-425.19	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*815
Disulfur oxide cation		970.53	969.25	± 0.60	kJ/mol	80.1309 ± 0.0120	135758-60-0*0
Oxothioxosulfate		-231.95	-233.56	± 0.87	kJ/mol	80.1319 ± 0.0120	12143-07-6*0
(Chlorooxy)methylene		155.5	155.3	± 3.7	kJ/mol	64.4707 ± 0.0012	331419-80-8*1
(Chlorooxy)methylene		119.2	117.9	± 2.7	kJ/mol	64.4707 ± 0.0012	331419-80-8*0
1-Propen-1-yl-3-ylidene		656.7	653.2	± 2.0	kJ/mol	39.0559 ± 0.0024	84654-90-0*12
Hydrogen chloride			-165.820	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*892
Formic acid			-425.19	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*816
1-Hydroxyethylidene		57.43	47.12	± 0.77	kJ/mol	44.0526 ± 0.0017	30967-49-8*2
Chloroformyl anion		-356.5	-352.9	± 3.3	kJ/mol	63.4633 ± 0.0012	41976-93-6*0
Hydroxyaminylium		1019.5	1012.3	± 2.5	kJ/mol	32.02147 ± 0.00034	66097-71-0*0
Sulfoniumyl		992.66	989.75	± 0.18	kJ/mol	34.0813 ± 0.0060	26453-60-1*0
Dihydrogen sulfide ion		108.2	106.9	± 3.2	kJ/mol	34.0824 ± 0.0060	12311-21-6*0
Nitric acid			-206.04	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*891
Hydrogen chloride			-166.794	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*844
Formic acid			-425.19	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*817
Methanediimine cation		1139.0	1136.2	± 3.2	kJ/mol	42.03951 ± 0.00082	1189338-16-6*1
Hydrogen fluoride			-328.57	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*855
Hydrogen bromide			-92.67	± 0.13	kJ/mol	80.9119 ± 0.0010	10035-10-6*803
Hydrogen bromide			-120.34	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*846
Sulfuric acid cation		400.8	387.8	± 3.2	kJ/mol	98.0789 ± 0.0061	247933-66-0*0
Fluoroimidogen		232.64	232.64	± 0.80	kJ/mol	33.005143 ± 0.000070	13967-06-1*0
Isofulminic acid cation		1376.9	1374.9	± 2.9	kJ/mol	43.02423 ± 0.00086	117800-60-9*0
Formic acid			-425.19	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*818
Iminomethide		237.3	233.6	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*0
Sulfate			-909.16	± 0.13	kJ/mol	96.0647 ± 0.0061	14808-79-8*800
Hydrogen iodide			-55.08	± 0.12	kJ/mol	127.912410 ± 0.000076	10034-85-2*818
Nitrogen sesquioxide cation		1027.6	1023.7	± 4.8	kJ/mol	76.01113 ± 0.00091	10544-73-70
Sulfuric acid			-880.42	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*815
Sulfuric acid			-882.02	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*816
Sulfuric acid			-883.51	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*817
Sulfuric acid			-884.81	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*818
Sulfuric acid			-885.48	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*819
Formic acid			-425.20	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*819
Dicarbon monoxide		377.12	381.16	± 0.83	kJ/mol	40.0208 ± 0.0016	12071-23-7*0
Formic acid			-425.21	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*820
Formic acid			-425.22	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*821
Sulfuric acid			-888.08	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*829
Sulfuric acid			-888.52	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*830
Sulfuric acid			-889.26	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*831
Sulfuric acid			-889.86	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*832
Sulfuric acid			-890.38	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*833
Sulfuric acid			-890.87	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*834
Isocyanoamidogen		489.7	487.7	± 1.2	kJ/mol	41.03212 ± 0.00082	947408-73-3*0
Carbon		2.389	1.861	± 0.043	kJ/mol	12.01070 ± 0.00080	7440-44-0*501
Sulfuric acid			-891.94	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*838
Oxonium		605.95	599.13	± 0.17	kJ/mol	19.02267 ± 0.00037	13968-08-6*1
2-Iodoethanol		-131.9	-150.2	± 2.5	kJ/mol	171.9650 ± 0.0017	624-76-0*0
1-Propen-1-yl-3-ylidene		665.8	662.3	± 2.0	kJ/mol	39.0559 ± 0.0024	84654-90-0*13
Sulfuric acid			-897.00	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*843
Hydrogen fluoride			-322.35	± 0.10	kJ/mol	20.006343 ± 0.000070	7664-39-3*833
O--HH Complex		247.2	248.2	± 2.0	kJ/mol	18.01528 ± 0.00033	7732-18-5102
Formic acid			-425.24	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*822
Sulfuric acid			-903.22	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*852
Sulfuric acid			-905.91	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*855
Sulfuric acid			-907.21	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*861
1,3,5-Hexatriyne cation		1600.8	1605.5	± 2.8	kJ/mol	74.0795 ± 0.0048	61866-06-6*0
Hydrogen chloride			-166.337	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*832
Hydrogen chloride			-164.501	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*820
Peroxychlorite		-116.2	-114.8	± 2.3	kJ/mol	83.4514 ± 0.0013	852472-63-0*0
Hydrogen iodide			-55.35	± 0.11	kJ/mol	127.912410 ± 0.000076	10034-85-2*819
1,3,5-Hexatriynylium		1913.7	1922.8	± 8.2	kJ/mol	73.0716 ± 0.0048	81932-75-4*1
Carbonylbis(oxy)		-144.7	-145.7	± 2.4	kJ/mol	60.0089 ± 0.0012	16518-45-9*0
(E)-Difluorodiazene cation	$F\N=N\[F+]$	1307.4	1302.3	± 3.7	kJ/mol	66.00974 ± 0.00014	13776-62-01
Cyclopropylidene		475.03	467.01	± 0.84	kJ/mol	40.0639 ± 0.0024	2143-70-6*0
Difluorodinitrate		-207.8	-206.6	± 4.7	kJ/mol	66.01083 ± 0.00014	37366-65-7*1
Oxoniumyl ion		978.741	975.590	± 0.024	kJ/mol	18.01473 ± 0.00033	56583-62-1*2
Hydrogen fluoride			-322.43	± 0.10	kJ/mol	20.006343 ± 0.000070	7664-39-3*834
COC vdW		589.7	598.4	± 1.5	kJ/mol	40.0208 ± 0.0016	12071-24-80
Diazene		207.17	200.03	± 0.40	kJ/mol	30.02936 ± 0.00020	3618-05-1*1
Propylidene anion		300.8	286.7	± 3.2	kJ/mol	42.0803 ± 0.0024	121408-55-70
Hydrogen fluoride			-333.04	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*866
Hydroxyformyl		-181.15	-183.69	± 0.40	kJ/mol	45.0174 ± 0.0010	2564-86-5*0
2-Cyclopropyn-1-ylidene		898.4	905.3	± 1.5	kJ/mol	36.0321 ± 0.0024	102508-15-6*0
Hydrogen iodide			-55.51	± 0.11	kJ/mol	127.912410 ± 0.000076	10034-85-2*820
1-Propen-1-yl-3-ylidene		699.3	696.4	± 3.4	kJ/mol	39.0559 ± 0.0024	84654-90-0*2
Methyl hydrocarbonate		-562.8	-578.3	± 1.9	kJ/mol	76.0514 ± 0.0019	7456-87-3*3
2-Hydroxyethylium		1019.3	1007.2	± 1.5	kJ/mol	45.0600 ± 0.0017	38607-31-7*0
Fluorine atom		82.088	83.873	± 0.017	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*2
Hydrogen fluoride			-321.85	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*888
Acetic acid			-483.01	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*923
Sulfur hydroxide oxide		-474.5	-483.5	± 1.6	kJ/mol	97.0715 ± 0.0061	12337-07-4*0
Sulfur hydroxide oxide		-473.7	-483.0	± 2.5	kJ/mol	97.0715 ± 0.0061	12337-07-4*2
Sulfur hydroxide oxide cation		658.6	648.3	± 3.4	kJ/mol	97.0710 ± 0.0061	12337-07-40
Sulfur hydroxide oxide cation		663.1	652.2	± 3.9	kJ/mol	97.0710 ± 0.0061	12337-07-41
Formylimidogen		245.2	242.1	± 4.6	kJ/mol	43.02478 ± 0.00086	42288-92-6*1
Hydrogen iodide			-56.432	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*837
Sulfurous acid		-507.1	-517.7	± 1.3	kJ/mol	82.0801 ± 0.0061	7782-99-2*1
Sulfurous acid		-497.5	-507.5	± 1.4	kJ/mol	82.0801 ± 0.0061	7782-99-2*3
1,2-Propadien-1-yl-3-ylidene anion		621.7	629.1	± 1.3	kJ/mol	36.0326 ± 0.0024	109292-47-9*1
3-Diaziridinylidene		521.8	515.0	± 1.5	kJ/mol	42.04006 ± 0.00082	85513-79-7*0
3-Diaziridinylidene		537.0	530.3	± 2.0	kJ/mol	42.04006 ± 0.00082	85513-79-7*2
Sulfite			-635.25	± 0.15	kJ/mol	80.0653 ± 0.0061	14265-45-3*800
Sulfurous acid			-610.09	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*828
Sulfurous acid			-610.81	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*829
Sulfurous acid			-611.35	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*830
Sulfurous acid			-611.78	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*908
Sulfurous acid			-612.16	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*831
Sulfurous acid			-612.76	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*832
Sulfurous acid			-613.26	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*833
Sulfurous acid			-614.20	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*836
Sulfurous acid			-614.89	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*839
Sulfurous acid			-615.98	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*840
Sulfurous acid			-616.74	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*841
Sulfurous acid			-617.78	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*842
Sulfurous acid			-618.19	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*899
Sulfurous acid			-618.52	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*843
Sulfurous acid			-619.11	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*844
Sulfurous acid			-620.09	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*847
Sulfurous acid			-620.68	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*850
Sulfonic acid		-482.2	-494.8	± 1.4	kJ/mol	82.0801 ± 0.0061	7782-99-20
Hydrogen iodide			-56.448	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*838
Ozone			118.19	± 0.50	kJ/mol	47.99820 ± 0.00090	10028-15-6*1000
Propene		7.72	4.01	± 0.82	kJ/mol	42.0797 ± 0.0024	115-07-1*500
Aminomethylidyne anion		481.6	478.1	± 3.2	kJ/mol	28.03387 ± 0.00082	96808-04-7*1
3,3-Dioxidedioxathiirane		-257.1	-265.2	± 1.4	kJ/mol	96.0636 ± 0.0061	1177730-84-5*0
Nitric acid			-206.05	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*828
Cyanoamidogen		322.70	320.21	± 0.63	kJ/mol	41.03212 ± 0.00082	12347-01-2*0
Sulfur tetraoxide		-228.2	-235.1	± 2.0	kJ/mol	96.0636 ± 0.0061	12772-98-4*0
Trioxidaniumyl		925.5	916.6	± 1.4	kJ/mol	50.01353 ± 0.00091	161321-37-5*0
Sulfur tetraoxide		-228.2	-235.1	± 2.0	kJ/mol	96.0636 ± 0.0061	12772-98-4*1
Sulfur tetraoxide		-163.6	-169.4	± 2.9	kJ/mol	96.0636 ± 0.0061	12772-98-4*2
Formic acid			-425.25	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*891
3-Diaziridinylidene cation		1479.7	1473.7	± 2.4	kJ/mol	42.03951 ± 0.00082	85513-79-70
Sulfur tetraoxide		-155.4	-164.3	± 4.0	kJ/mol	96.0636 ± 0.0061	12772-98-4*23
Formic acid			-425.27	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*825
Hydroxyformyl anion		-319.53	-321.40	± 0.56	kJ/mol	45.0180 ± 0.0010	78944-70-4*0
Formic acid			-425.30	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*892
Formic acid			-425.33	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*830
Chlorine chlorite		168.6	166.4	± 1.3	kJ/mol	102.9042 ± 0.0019	105206-44-8*0
Nitric acid			-206.17	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*833
Oxonium			-285.804	± 0.022	kJ/mol	19.02267 ± 0.00037	13968-08-6*800
Dioxoperoxysulfate dianion		-209.1	-214.8	± 2.1	kJ/mol	96.0647 ± 0.0061	14808-79-80
Dioxoperoxysulfate dianion		-186.5	-192.2	± 2.9	kJ/mol	96.0647 ± 0.0061	14808-79-82
Hydrogen chloride			-166.823	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*846
Methanethiol cation		901.89	891.85	± 0.46	kJ/mol	48.1079 ± 0.0061	53369-41-8*0
Formic acid			-425.34	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*831
Hydrogen iodide			-56.762	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*855
Trihydrogen		254.5	250.7	± 1.2	kJ/mol	3.02382 ± 0.00021	12184-91-7*200
Thioformaldehyde anion		75.8	72.8	± 2.7	kJ/mol	46.0931 ± 0.0061	71928-47-7*0
Thioformaldehyde		121.3	117.6	± 2.0	kJ/mol	46.0926 ± 0.0061	865-36-1*0
Thioformaldehyde		294.9	292.3	± 2.0	kJ/mol	46.0926 ± 0.0061	865-36-1*3
Hydrogen fluoride			-321.82	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*887
Ethanethiol cation		867.10	850.94	± 0.59	kJ/mol	62.1345 ± 0.0062	69762-64-7*0
C=O-C cation		1585.8	1592.9	± 2.7	kJ/mol	40.0203 ± 0.0016	83483-98-1*0
Trichlorine cation		1056.6	1055.5	± 1.4	kJ/mol	106.3576 ± 0.0027	33088-85-6*0
Dimethyl sulfide cation		817.85	802.10	± 0.48	kJ/mol	62.1345 ± 0.0062	34480-65-4*0
Carbonate			-675.166	± 0.053	kJ/mol	60.0100 ± 0.0012	3812-32-6*800
Cyanoamidogen		652.4	650.3	± 1.2	kJ/mol	41.03212 ± 0.00082	12347-01-2*2
Hydrogen peroxide		-129.406	-135.412	± 0.057	kJ/mol	34.01468 ± 0.00062	7722-84-1*1
Nitric acid			-206.17	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*895
1-Methoxyethenol		-284.3	-302.7	± 1.2	kJ/mol	74.0785 ± 0.0025	4453-91-2*0
Formic acid			-425.34	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*832
Ammonium hydroxide			-366.19	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*852
Carbon disulfide cation		1088.27	1090.02	± 0.68	kJ/mol	76.1422 ± 0.0120	12539-80-9*0
Sulfidocarbonothioyl		73.5	75.0	± 3.3	kJ/mol	76.1432 ± 0.0120	12122-00-8*0
Formic acid			-425.34	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*833
Cyanoaminylium		1363.1	1360.8	± 1.3	kJ/mol	41.03157 ± 0.00082	205443-18-1*0
Carbon monosulfide cation		1371.32	1374.56	± 0.78	kJ/mol	44.0762 ± 0.0061	12351-95-0*0
Carbon monosulfide anion		259.1	262.9	± 2.2	kJ/mol	44.0772 ± 0.0061	12121-99-2*0
[1.1.1]Propellane		378.6	361.0	± 1.5	kJ/mol	66.1011 ± 0.0040	35634-10-7*0
Ammonium hydroxide			-366.38	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*837
Platinum atom anion		358.4	358.9	± 1.7	kJ/mol	195.0785 ± 0.0020	40817-31-0*0
Ethynylamidogen anion		233.7	230.5	± 3.2	kJ/mol	40.0446 ± 0.0016	64066-03-1*0
Platinum dimer cation		1661.0	1659.6	± 4.3	kJ/mol	390.1555 ± 0.0040	73146-08-4*0
Platinum dimer anion		640.3	639.8	± 3.9	kJ/mol	390.1565 ± 0.0040	153298-77-2*0
Cyanoamidogen anion		391.7	389.9	± 1.8	kJ/mol	41.03267 ± 0.00082	67131-47-9*1
Cyanoamidogen anion		392.3	390.4	± 6.2	kJ/mol	41.03267 ± 0.00082	67131-47-9*11
Difluorodioxidane anion		-251.	-251.	± 28.	kJ/mol	69.99615 ± 0.00060	7783-45-10
Hydrogen atom		-37.0	-40.2	± 1.1	kJ/mol	1.007940 ± 0.000070	12385-13-6*1001000
Formic acid			-425.35	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*895
Dinitrogen tetraoxide		-37.85	-27.00	± 0.19	kJ/mol	92.0111 ± 0.0012	10544-72-6*500
Ethynylaminylium		1277.8	1277.4	± 2.6	kJ/mol	40.0435 ± 0.0016	103835-08-1*0
Formic acid			-425.35	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*834
Hydrogen atom		-32.	-34.	± 20.	kJ/mol	1.007940 ± 0.000070	12385-13-6*1002000
Hydrogen bromide			-110.69	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*809
Formic acid			-425.35	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*835
Formic acid			-425.35	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*837
Hydrogen bromide			-120.44	± 0.12	kJ/mol	80.9119 ± 0.0010	10035-10-6*855
Formic acid			-425.35	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*838
Formic acid			-425.36	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*839
Argon cation		1520.571	1520.580	± 0.000	kJ/mol	39.94745 ± 0.00100	14791-69-6*0
Argon dimer cation		1393.760	1391.173	± 0.018	kJ/mol	79.8955 ± 0.0020	17596-58-6*0
Argon atom dication		4186.429	4186.468	± 0.013	kJ/mol	39.94690 ± 0.00100	15056-24-3*0
Argon dimer		-1.013	-6.347	± 0.0051	kJ/mol	79.8960 ± 0.0020	12595-59-4*0
Argon anion		25.	25.	± 28.	kJ/mol	39.94855 ± 0.00100	16544-90-4*1
Neon anion		13.	13.	± 29.	kJ/mol	20.18025 ± 0.00060	20205-95-2*0
Argon anion		25.	25.	± 28.	kJ/mol	39.94855 ± 0.00100	16544-90-4*0
Helium anion		51.	51.	± 130.	kJ/mol	4.0031506 ± 0.0000020	14452-58-5*1
Helium anion		51.	51.	± 130.	kJ/mol	4.0031506 ± 0.0000020	14452-58-5*0
Dihelium		-0.000	-6.197	± 0.000	kJ/mol	8.0052040 ± 0.0000040	12184-98-4*3
Dihelium		-0.000	-6.197	± 0.000	kJ/mol	8.0052040 ± 0.0000040	12184-98-4*0
Dichlorine		-30.21	-18.49	± 0.51	kJ/mol	70.9054 ± 0.0018	7782-50-5*500
Helium anion		1868.42	1868.42	± 0.19	kJ/mol	4.0031506 ± 0.0000020	14452-58-5*2
Helium			-0.702	± 0.092	kJ/mol	4.0026020 ± 0.0000020	7440-59-7*1000
Dinitrogen			-10.30	± 0.32	kJ/mol	28.01348 ± 0.00014	7727-37-9*1000
Dihydrogen			-4.104	± 0.059	kJ/mol	2.01588 ± 0.00014	1333-74-0*1000
Neon			-3.883	± 0.092	kJ/mol	20.17970 ± 0.00060	7440-01-9*1000
Dioxygen			-11.963	± 0.041	kJ/mol	31.99880 ± 0.00060	7782-44-7*1000
Argon anion		1111.116	1111.116	± 0.098	kJ/mol	39.94855 ± 0.00100	16544-90-4*2
Argon			-12.249	± 0.092	kJ/mol	39.94800 ± 0.00100	7440-37-1*1000
Krypton anion		110.	110.	± 350.	kJ/mol	83.8005 ± 0.1000	20205-93-0*0
Krypton			-15.65	± 0.11	kJ/mol	83.8000 ± 0.1000	7439-90-9*1000
Xenon			-19.404	± 0.092	kJ/mol	131.2900 ± 0.0200	7440-63-3*1000
Radon cation		1037.07	1037.07	± 0.61	kJ/mol	221.9995 ± 0.1000	22541-65-7*0
Radon			-21.33	± 0.96	kJ/mol	222.0000 ± 0.1000	10043-92-2*1000
Hydron		0	0	exact		1.007391 ± 0.000070	12408-02-5*800

References

1		B. Ruscic, R. E. Pinzon, M. L. Morton, G. von Laszewski, S. Bittner, S. G. Nijsure, K. A. Amin, M. Minkoff, and A. F. Wagner, Introduction to Active Thermochemical Tables: Several "Key" Enthalpies of Formation Revisited. J. Phys. Chem. A 108, 9979-9997 (2004) [DOI: 10.1021/jp047912y]
2		B. Ruscic, R. E. Pinzon, G. von Laszewski, D. Kodeboyina, A. Burcat, D. Leahy, D. Montoya, and A. F. Wagner, Active Thermochemical Tables: Thermochemistry for the 21^st Century. J. Phys. Conf. Ser. 16, 561-570 (2005) [DOI: 10.1088/1742-6596/16/1/078]
3		B. Ruscic and D. H. Bross, Active Thermochemical Tables (ATcT) values based on ver. 1.172 of the Thermochemical Network (2024); available at ATcT.anl.gov
4		K. L. Caster, N. A. Seifert, B. Ruscic, A. W. Jasper, and K. Prozument, Dynamics of HCN, NHC, and HNCO Formation in the 193 nm Photodissociation of Formamide J. Phys. Chem. A (in press) (2024) [DOI: 10.1021/acs.jpca.4c02232]
5		B. Ruscic, Uncertainty Quantification in Thermochemistry, Benchmarking Electronic Structure Computations, and Active Thermochemical Tables. Int. J. Quantum Chem. 114, 1097-1101 (2014) [DOI: 10.1002/qua.24605]
6		B. Ruscic and D. H. Bross, Thermochemistry Computer Aided Chem. Eng. 45, 3-114 (2019) [DOI: 10.1016/B978-0-444-64087-1.00001-2]

Formula

The aggregate state is given in parentheses following the formula, such as: g - gas-phase, cr - crystal, l - liquid, etc.

Uncertainties

The listed uncertainties correspond to estimated 95% confidence limits, as customary in thermochemistry (see, for example, Ruscic [5] and Ruscic and Bross[6]).
Note that an uncertainty of ± 0.000 kJ/mol indicates that the estimated uncertainty is < ± 0.000₅ kJ/mol.

Website Functionality Credits

The reorganization of the website was developed and implemented by David H. Bross (ANL).
The find function is based on the complete Species Dictionary entries for the appropriate version of the ATcT TN.
The molecule images are rendered by Indigo-depict.
The XYZ renderings are based on Jmol: an open-source Java viewer for chemical structures in 3D. http://www.jmol.org/.

Acknowledgement

This work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences and Biosciences under Contract No. DE-AC02-06CH11357.