ATcT [1, 2] enthalpies of formation based on version 1.124 of the Thermochemical Network [3]

Below is a list of 0 K and 298.15 K enthalpies of formation for all 2791 species included in version 1.124 (as of 09/01/2022).
This version of ATcT results was generated by additional expansion of version 1.122x [4] to include additional information relevant to the study of thermophysical and thermochemical properties of CH2 and CH3 using nonrigid rotor anharmonic oscillator (NRRAO) partition functions [5], the development and benchmarking of a state-of-the-art computational approach that aims to reproduce total atomization energies of small molecules within 10–15 cm^-1 [6], as well as the study of the reversible reaction C₂H₃ + H₂ ⇌ C₂H₄ + H ⇌ C₂H₅ [7]

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		711.404	716.889	± 0.044	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		-66.551	-74.520	± 0.048	kJ/mol	16.04246 ± 0.00085	74-82-8*0
Nitrogen atom		470.580	472.442	± 0.024	kJ/mol	14.006740 ± 0.000070	17778-88-0*0
Water		-286.268	-285.796	± 0.025	kJ/mol	18.01528 ± 0.00033	7732-18-5*500
Carbon dioxide		-393.110	-393.476	± 0.015	kJ/mol	44.00950 ± 0.00100	124-38-9*0
Ethane		-68.39	-84.02	± 0.12	kJ/mol	30.0690 ± 0.0017	74-84-0*0
Water		-238.898	-241.801	± 0.025	kJ/mol	18.01528 ± 0.00033	7732-18-5*0
Hydron		1528.084	1530.047	± 0.000	kJ/mol	1.007391 ± 0.000070	12408-02-5*0
Chlorine atom		119.621	121.302	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*0
Fluorine atom		77.252	79.358	± 0.017	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*0
Ethylene		60.89	52.38	± 0.12	kJ/mol	28.0532 ± 0.0016	74-85-1*0
Methyl		149.872	146.471	± 0.053	kJ/mol	15.03452 ± 0.00083	2229-07-4*0
Propane		-82.72	-105.00	± 0.16	kJ/mol	44.0956 ± 0.0025	74-98-6*0
Methanol		-190.04	-200.92	± 0.15	kJ/mol	32.04186 ± 0.00090	67-56-1*0
Ammonia		-38.563	-45.556	± 0.029	kJ/mol	17.03056 ± 0.00022	7664-41-7*0
Hydroxyl		37.283	37.522	± 0.025	kJ/mol	17.00734 ± 0.00031	3352-57-6*0
Bromine atom		117.910	111.847	± 0.056	kJ/mol	79.90400 ± 0.00100	10097-32-2*0
Formaldehyde		-105.389	-109.229	± 0.096	kJ/mol	30.02598 ± 0.00087	50-00-0*0
Acetylene		228.88	228.32	± 0.13	kJ/mol	26.0373 ± 0.0016	74-86-2*0
Carbon monoxide		-113.804	-110.524	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*0
Ethanol		-217.32	-235.04	± 0.21	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
Hydrogen fluoride		-272.680	-272.727	± 0.019	kJ/mol	20.006343 ± 0.000070	7664-39-3*0
Benzene		100.75	83.23	± 0.22	kJ/mol	78.1118 ± 0.0048	71-43-2*0
Ethyl		131.38	120.63	± 0.22	kJ/mol	29.0611 ± 0.0016	2025-56-1*0
Propene		34.85	20.02	± 0.19	kJ/mol	42.0797 ± 0.0024	115-07-1*0
Hydrogen cyanide		129.678	129.294	± 0.089	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		-27.88	-35.73	± 0.13	kJ/mol	80.9119 ± 0.0010	10035-10-6*0
Nitric oxide		90.638	91.142	± 0.066	kJ/mol	30.00614 ± 0.00031	10102-43-9*0
Chloromethane		-74.73	-82.66	± 0.16	kJ/mol	50.4872 ± 0.0012	74-87-3*0
Propyne		192.67	185.51	± 0.22	kJ/mol	40.0639 ± 0.0024	74-99-7*0
Acetaldehyde		-155.03	-165.55	± 0.23	kJ/mol	44.0526 ± 0.0017	75-07-0*0
Hydroxyde		-139.059	-139.025	± 0.025	kJ/mol	17.00789 ± 0.00031	14280-30-9*0
Nitrogen dioxide		36.878	34.071	± 0.066	kJ/mol	46.00554 ± 0.00060	10102-44-0*0
Acetone		-199.99	-216.93	± 0.27	kJ/mol	58.0791 ± 0.0025	67-64-1*0
Methylamine		-6.54	-21.25	± 0.23	kJ/mol	31.05714 ± 0.00088	74-89-5*0
Dioxidanyl		15.14	12.23	± 0.15	kJ/mol	33.00674 ± 0.00060	3170-83-0*0
Fluoromethane		-227.48	-235.51	± 0.23	kJ/mol	34.03292 ± 0.00083	593-53-3*0
Hydrogen iodide		28.643	26.467	± 0.036	kJ/mol	127.912410 ± 0.000076	10034-85-2*0
Hydrogen peroxide		-129.411	-135.397	± 0.061	kJ/mol	34.01468 ± 0.00062	7722-84-1*0
Vinyl		301.26	297.22	± 0.30	kJ/mol	27.0452 ± 0.0016	2669-89-8*0
n-Butane		-98.33	-125.64	± 0.24	kJ/mol	58.1222 ± 0.0033	106-97-8*0
Toluene		73.37	50.08	± 0.32	kJ/mol	92.1384 ± 0.0056	108-88-3*0
Allene		197.40	189.95	± 0.23	kJ/mol	40.0639 ± 0.0024	463-49-0*0
Methylene		391.054	391.600	± 0.096	kJ/mol	14.02658 ± 0.00081	2465-56-7*1
Ammonium hydroxide			-366.37	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*839
Methylene		428.71	429.13	± 0.11	kJ/mol	14.02658 ± 0.00081	2465-56-7*2
Nitrilomethyl		436.73	440.02	± 0.14	kJ/mol	26.01744 ± 0.00080	2074-87-5*0
Silicon		450.37	454.70	± 0.59	kJ/mol	28.08550 ± 0.00030	7440-21-3*0
Hydrogen chloride			-165.755	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*828
Bromomethane		-20.91	-36.31	± 0.16	kJ/mol	94.9385 ± 0.0013	74-83-9*0
1,3-Butadiene		125.54	111.07	± 0.32	kJ/mol	54.0904 ± 0.0032	106-99-0*0
Hydrogen iodide			-56.646	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*844
Ozone		144.406	141.744	± 0.039	kJ/mol	47.99820 ± 0.00090	10028-15-6*0
Acetonitrile		81.12	74.06	± 0.24	kJ/mol	41.0520 ± 0.0016	75-05-8*0
Methoxy		28.92	21.55	± 0.27	kJ/mol	31.03392 ± 0.00088	2143-68-2*0
Formic acid		-371.05	-378.37	± 0.22	kJ/mol	46.0254 ± 0.0010	64-18-6*1
Acetic acid			-484.66	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*828
Fluoride		-250.912	-249.128	± 0.017	kJ/mol	18.99895178 ± 0.00000050	16984-48-8*0
Hydrogen bromide			-120.64	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*842
iso-Butane		-105.88	-134.48	± 0.28	kJ/mol	58.1222 ± 0.0033	75-28-5*0
Formic acid			-425.30	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*828
Silane		42.75	33.13	± 0.66	kJ/mol	32.11726 ± 0.00041	7803-62-5*0
Hydrogen fluoride			-303.21	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*590
Hypochlorous acid		-73.835	-76.775	± 0.026	kJ/mol	52.46004 ± 0.00095	7790-92-3*0
Ketene		-45.36	-48.42	± 0.11	kJ/mol	42.0367 ± 0.0016	463-51-4*0
Phenyl		352.15	338.79	± 0.63	kJ/mol	77.1039 ± 0.0048	2396-01-2*0
Methoxide		-122.47	-130.20	± 0.27	kJ/mol	31.03447 ± 0.00088	3315-60-4*0
Dibromine		45.67	30.87	± 0.11	kJ/mol	159.8080 ± 0.0020	7726-95-6*0
Amidogen		188.92	186.03	± 0.11	kJ/mol	16.02262 ± 0.00016	13770-40-6*0
Acetic acid		-418.53	-432.70	± 0.36	kJ/mol	60.0520 ± 0.0017	64-19-7*1
Tetrafluoromethane		-927.77	-933.74	± 0.23	kJ/mol	88.00431 ± 0.00080	75-73-0*0
Diiodine		65.497	62.417	± 0.0041	kJ/mol	253.808940 ± 0.000060	7553-56-2*0
Propargyl		354.05	351.46	± 0.32	kJ/mol	39.0559 ± 0.0024	2932-78-7*0
Formyl		41.381	41.755	± 0.096	kJ/mol	29.01804 ± 0.00086	2597-44-6*0
Allyl		179.95	168.23	± 0.39	kJ/mol	41.0718 ± 0.0024	1981-80-2*0
Hydroxymethyl		-10.37	-16.67	± 0.28	kJ/mol	31.03392 ± 0.00088	2597-43-5*0
Chloroethane		-96.95	-111.54	± 0.25	kJ/mol	64.5138 ± 0.0019	75-00-3*0
Methylidyne		592.837	596.171	± 0.097	kJ/mol	13.01864 ± 0.00080	3315-37-5*0
Ethynyl		563.76	567.88	± 0.15	kJ/mol	25.0293 ± 0.0016	2122-48-7*0
Fluoroform		-689.34	-696.29	± 0.38	kJ/mol	70.01385 ± 0.00080	75-46-7*0
Chloride		-228.953	-227.346	± 0.0021	kJ/mol	35.45325 ± 0.00090	16887-00-6*0
Trifluoromethyl		-464.92	-467.72	± 0.43	kJ/mol	69.00591 ± 0.00080	2264-21-3*0
Ethylium		914.95	902.88	± 0.30	kJ/mol	29.0606 ± 0.0016	14936-94-8*0
Methanimine		96.42	88.51	± 0.36	kJ/mol	29.04126 ± 0.00083	2053-29-4*0
Phenol		-74.67	-93.26	± 0.63	kJ/mol	94.1112 ± 0.0048	108-95-2*0
Tetrachloromethane		-89.36	-91.53	± 0.41	kJ/mol	153.8215 ± 0.0037	56-23-5*0
Sulfur dioxide		-294.13	-296.67	± 0.13	kJ/mol	64.0648 ± 0.0060	7446-09-5*0
Bromide		-206.627	-212.690	± 0.056	kJ/mol	79.90455 ± 0.00100	24959-67-9*0
Oxomethylium		827.757	827.172	± 0.096	kJ/mol	29.01749 ± 0.00086	17030-74-9*0
Hypobromous acid		-51.36	-61.84	± 0.48	kJ/mol	96.9113 ± 0.0010	13517-11-8*0
Ethenol		-113.38	-124.50	± 0.38	kJ/mol	44.0526 ± 0.0017	557-75-5*1
Oxonium		605.88	599.13	± 0.17	kJ/mol	19.02267 ± 0.00037	13968-08-6*0
Benzaldehyde		-19.77	-37.56	± 0.77	kJ/mol	106.1219 ± 0.0056	100-52-7*0
Ethylamine		-28.11	-49.88	± 0.46	kJ/mol	45.0837 ± 0.0017	75-04-7*0
Chlorooxidanyl		101.124	101.716	± 0.035	kJ/mol	51.45210 ± 0.00095	14989-30-1*0
Iodide		-187.995	-188.396	± 0.0021	kJ/mol	126.905019 ± 0.000030	20461-54-5*0
Methyl hydroperoxide		-114.87	-127.69	± 0.46	kJ/mol	48.0413 ± 0.0010	3031-73-0*0
iso-Propyl		105.57	88.70	± 0.44	kJ/mol	43.0877 ± 0.0024	2025-55-0*0
Acetyl		-3.46	-10.03	± 0.30	kJ/mol	43.0446 ± 0.0016	3170-69-2*0
Formamide		-178.59	-188.95	± 0.35	kJ/mol	45.04066 ± 0.00088	75-12-7*0
n-Propyl		118.38	100.98	± 0.47	kJ/mol	43.0877 ± 0.0024	2143-61-5*0
Hydroxyformyl		-181.18	-184.15	± 0.42	kJ/mol	45.0174 ± 0.0010	2564-86-5*1
Vinyl chloride		29.38	21.80	± 0.28	kJ/mol	62.4979 ± 0.0018	75-01-4*0
Imidogen		358.74	358.79	± 0.16	kJ/mol	15.014680 ± 0.000099	13774-92-0*0
Dioxymethyl	$[O-]\[O+]=C$	111.95	104.94	± 0.62	kJ/mol	46.0254 ± 0.0010	56077-92-0*0
Cyanoacetylene		372.13	373.87	± 0.62	kJ/mol	51.0468 ± 0.0024	1070-71-9*0
Vinylacetylene		296.26	289.50	± 0.56	kJ/mol	52.0746 ± 0.0032	689-97-4*0
Nitric acid		-124.47	-134.18	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*0
Ethoxide		-163.87	-178.81	± 0.44	kJ/mol	45.0610 ± 0.0017	16331-64-9*0
Methoxymethane		-166.51	-184.01	± 0.37	kJ/mol	46.0684 ± 0.0017	115-10-6*0
Methylperoxy		22.52	13.07	± 0.37	kJ/mol	47.0333 ± 0.0010	2143-58-0*0
1-Hydroxyethyl		-42.86	-56.29	± 0.47	kJ/mol	45.0605 ± 0.0017	2348-46-1*1
Methylium		1099.345	1095.402	± 0.049	kJ/mol	15.03397 ± 0.00083	14531-53-4*0
Isocyanic acid		-115.96	-118.95	± 0.28	kJ/mol	43.02478 ± 0.00086	75-13-8*0
Difluorophosgene		-603.36	-606.46	± 0.40	kJ/mol	66.00691 ± 0.00085	353-50-4*0
Hypofluorous acid		-84.37	-87.27	± 0.19	kJ/mol	36.00574 ± 0.00031	14034-79-8*0
Oxygen atom anion		105.868	108.097	± 0.0021	kJ/mol	15.99995 ± 0.00030	14337-01-0*0
Nitric acid			-206.24	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*839
Iodomethane		24.39	14.86	± 0.18	kJ/mol	141.93899 ± 0.00083	74-88-4*0
N-Methylenemethanamine		94.50	79.58	± 0.68	kJ/mol	43.0678 ± 0.0016	1761-67-7*0
Dichloromethane		-86.92	-93.77	± 0.33	kJ/mol	84.9320 ± 0.0020	75-09-2*0
1,3-Butadiyne		458.36	460.08	± 0.58	kJ/mol	50.0587 ± 0.0032	460-12-8*0
Chlorobenzene		67.28	52.32	± 0.61	kJ/mol	112.5566 ± 0.0049	108-90-7*0
Hydrogen chloride			-166.449	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*834
Ethynide		277.32	280.73	± 0.19	kJ/mol	25.0299 ± 0.0016	29075-95-4*0
1,2-Butadiene		176.02	162.52	± 0.43	kJ/mol	54.0904 ± 0.0032	590-19-2*0
Dimethylamine		4.21	-17.43	± 0.40	kJ/mol	45.0837 ± 0.0017	124-40-3*0
Trihydrogen cation		1110.304	1106.696	± 0.013	kJ/mol	3.02327 ± 0.00021	28132-48-1*0
Hydride		143.264	145.228	± 0.000	kJ/mol	1.008489 ± 0.000070	12184-88-2*0
Cyanogen chloride		135.17	135.86	± 0.46	kJ/mol	61.4701 ± 0.0012	506-77-4*0
Isocyanomethane		183.84	177.30	± 0.48	kJ/mol	41.0520 ± 0.0016	593-75-9*0
Cyclopropane		71.00	53.88	± 0.38	kJ/mol	42.0797 ± 0.0024	75-19-4*0
2-Hydroxyethyl		-13.07	-26.33	± 0.49	kJ/mol	45.0605 ± 0.0017	4422-54-2*1
Methyl formate		-346.94	-359.99	± 0.65	kJ/mol	60.0520 ± 0.0017	107-31-3*1
Sulfur trioxide		-389.74	-395.49	± 0.24	kJ/mol	80.0642 ± 0.0061	7446-11-9*0
Sulfuric acid			-887.45	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*828
Sulfurous acid			-619.41	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*898
Ammonium		643.01	631.69	± 0.20	kJ/mol	18.03795 ± 0.00029	14798-03-9*0
2-Butyne		159.42	146.45	± 0.46	kJ/mol	54.0904 ± 0.0032	503-17-3*0
Cyclopropene		292.36	283.63	± 0.45	kJ/mol	40.0639 ± 0.0024	2781-85-3*0
Cyclopentadiene		151.45	134.33	± 0.61	kJ/mol	66.1011 ± 0.0040	542-92-7*0
Difluoromethane		-443.38	-450.99	± 0.33	kJ/mol	52.02339 ± 0.00081	75-10-5*0
Silyl		204.79	199.32	± 0.86	kJ/mol	31.10932 ± 0.00037	13765-44-1*0
Oxygen difluoride		26.82	24.57	± 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
Nitrosyl hydride		109.94	106.97	± 0.11	kJ/mol	31.01408 ± 0.00032	14332-28-6*0
Propynylidene		543.50	546.49	± 0.65	kJ/mol	38.0480 ± 0.0024	67152-18-5*1
Isobutene		4.18	-16.89	± 0.38	kJ/mol	56.1063 ± 0.0032	115-11-7*0
Butatriene		328.33	322.07	± 0.62	kJ/mol	52.0746 ± 0.0032	2873-50-9*0
Ethoxy		1.26	-12.64	± 0.43	kJ/mol	45.0605 ± 0.0017	2154-50-9*51
Phosgene		-217.50	-219.19	± 0.24	kJ/mol	98.9155 ± 0.0020	75-44-5*0
1-Hydroxy-2-propanone		-354.56	-373.95	± 0.84	kJ/mol	74.0785 ± 0.0025	116-09-6*11
Chloroform		-94.65	-99.55	± 0.39	kJ/mol	119.3767 ± 0.0028	67-66-3*0
Tetrafluoroethylene		-670.77	-674.17	± 0.49	kJ/mol	100.0150 ± 0.0016	116-14-3*0
Fluoromethylidyne		243.12	246.72	± 0.12	kJ/mol	31.00910 ± 0.00080	3889-75-6*0
Phenide		244.40	230.98	± 0.39	kJ/mol	77.1044 ± 0.0048	30922-78-2*0
Acrylonitrile		193.81	187.05	± 0.66	kJ/mol	53.0627 ± 0.0024	107-13-1*1
Silanol		-271.1	-282.8	± 1.3	kJ/mol	48.11666 ± 0.00051	14475-38-8*0
Nitrous acid		-72.970	-79.113	± 0.079	kJ/mol	47.01348 ± 0.00061	7782-77-6*1
1,2-Propadiene-1,3-diylidene		814.55	823.50	± 0.53	kJ/mol	36.0321 ± 0.0024	12075-35-3*0
Oxirane		-39.97	-52.51	± 0.35	kJ/mol	44.0526 ± 0.0017	75-21-8*0
Vinyl anion		237.03	232.61	± 0.68	kJ/mol	27.0458 ± 0.0016	25012-81-1*0
Methylamidogen		187.89	177.24	± 0.40	kJ/mol	30.04920 ± 0.00085	15622-51-2*0
Cyanide		63.974	67.260	± 0.093	kJ/mol	26.01799 ± 0.00080	57-12-5*0
Cyanogen bromide		186.5	180.0	± 1.4	kJ/mol	105.9214 ± 0.0013	506-68-3*0
Oxygen atom cation		1560.786	1562.643	± 0.0021	kJ/mol	15.99885 ± 0.00030	14581-93-2*0
1-Butene		21.15	0.20	± 0.35	kJ/mol	56.1063 ± 0.0032	106-98-9*0
Formate		-463.17	-466.82	± 0.55	kJ/mol	45.0180 ± 0.0010	71-47-6*0
Methyl acetate		-394.15	-413.02	± 0.57	kJ/mol	74.0785 ± 0.0025	79-20-9*1
Ethyl bromide		-41.33	-63.27	± 0.24	kJ/mol	108.9651 ± 0.0019	74-96-4*0
Vinyl bromide		88.69	73.89	± 0.56	kJ/mol	106.9492 ± 0.0019	593-60-2*0
Benzoyl		138.3	124.7	± 1.1	kJ/mol	105.1140 ± 0.0056	2652-65-5*0
Methyl nitrite		-55.54	-67.32	± 0.45	kJ/mol	61.0401 ± 0.0010	624-91-9*2
Naphthalene		171.07	147.60	± 0.59	kJ/mol	128.1705 ± 0.0080	91-20-3*0
Chlorine fluoride		-55.623	-55.718	± 0.030	kJ/mol	54.45110 ± 0.00090	7790-89-8*0
Diazynium		1042.52	1038.91	± 0.68	kJ/mol	29.02087 ± 0.00016	12357-66-3*0
Nitrite		-182.61	-185.42	± 0.46	kJ/mol	46.00609 ± 0.00060	14797-65-0*0
Hydroxylamine		-33.07	-43.45	± 0.42	kJ/mol	33.02996 ± 0.00037	7803-49-8*1
Aminomethyl		159.35	149.51	± 0.36	kJ/mol	30.04920 ± 0.00085	10507-29-6*0
n-Butyl		102.99	80.48	± 0.70	kJ/mol	57.1143 ± 0.0033	2492-36-6*0
cis-2-Butene	$C/C=C\C$	14.32	-6.95	± 0.40	kJ/mol	56.1063 ± 0.0032	590-18-1*0
1-Butyne		180.35	166.77	± 0.56	kJ/mol	54.0904 ± 0.0032	107-00-6*0
n-Hexane		-129.88	-166.75	± 0.33	kJ/mol	86.1754 ± 0.0049	110-54-3*0
Acetone enol		-151.35	-168.64	± 0.69	kJ/mol	58.0791 ± 0.0025	29456-04-0*1
Tetrabromomethane		142.8	113.2	± 1.1	kJ/mol	331.6267 ± 0.0041	558-13-4*0
Vinyl fluoride		-134.54	-142.34	± 0.45	kJ/mol	46.0436 ± 0.0016	75-02-5*0
Phenylium		1149.15	1136.37	± 0.85	kJ/mol	77.1034 ± 0.0048	17333-73-2*0
Fluorooxidanyl		110.28	110.90	± 0.14	kJ/mol	34.99780 ± 0.00030	12061-70-0*0
Hypoiodous acid		-54.1	-58.9	± 3.1	kJ/mol	143.91181 ± 0.00031	14332-21-9*0
Azanide		114.71	111.84	± 0.29	kJ/mol	16.02317 ± 0.00016	17655-31-1*0
Methanium		921.98	911.73	± 0.44	kJ/mol	17.04985 ± 0.00087	15135-49-6*0
Ethylidene		361.27	354.27	± 0.46	kJ/mol	28.0532 ± 0.0016	4218-50-2*1
Cyanomethyl		263.31	260.43	± 0.59	kJ/mol	40.0440 ± 0.0016	2932-82-3*0
Cyanic fluoride		8.59	8.92	± 0.71	kJ/mol	45.01584 ± 0.00080	1495-50-7*0
n-Pentane		-114.17	-146.04	± 0.30	kJ/mol	72.1488 ± 0.0041	109-66-0*0
Formic acid		-354.72	-361.82	± 0.38	kJ/mol	46.0254 ± 0.0010	64-18-6*2
Cyanooxidanyl		126.94	127.41	± 0.33	kJ/mol	42.01684 ± 0.00086	22400-26-6*0
Aziridine		143.25	126.72	± 0.89	kJ/mol	43.0678 ± 0.0016	151-56-4*0
Methanetetraylbisamidogen		451.24	451.65	± 0.44	kJ/mol	40.02418 ± 0.00081	2669-76-3*0
Fluoroethane		-257.24	-272.10	± 0.36	kJ/mol	48.0595 ± 0.0016	353-36-6*0
Chlorotrifluoromethane		-704.36	-709.47	± 0.56	kJ/mol	104.4586 ± 0.0012	75-72-9*0
Fluorobenzene		-99.41	-115.09	± 0.88	kJ/mol	96.1023 ± 0.0048	462-06-6*0
Nitromethane		-60.75	-74.64	± 0.46	kJ/mol	61.0401 ± 0.0010	75-52-5*0
Pyridine		157.36	140.55	± 0.40	kJ/mol	79.0999 ± 0.0040	110-86-1*0
Acrylonitrile		193.81	187.05	± 0.66	kJ/mol	53.0627 ± 0.0024	107-13-1*0
1,2,3-Butatrien-1-yl		497.43	497.44	± 0.69	kJ/mol	51.0666 ± 0.0032	22112-56-7*0
Disilane		92.2	76.1	± 1.4	kJ/mol	62.21864 ± 0.00073	1590-87-0*0
2,4-Hexadiyne		380.23	370.20	± 0.87	kJ/mol	78.1118 ± 0.0048	2809-69-0*0
Bromooxidanyl		131.20	123.66	± 0.28	kJ/mol	95.9034 ± 0.0010	15656-19-6*0
Dioxygen cation		1164.585	1165.221	± 0.0092	kJ/mol	31.99825 ± 0.00060	12185-07-8*0
Ethynylene		820.005	828.470	± 0.092	kJ/mol	24.0214 ± 0.0016	12070-15-4*0
Methylidyne		664.59	667.93	± 0.54	kJ/mol	13.01864 ± 0.00080	3315-37-5*2
Ethanide		155.44	144.36	± 0.87	kJ/mol	29.0616 ± 0.0016	25013-41-6*0
Vinylium		1119.08	1115.63	± 0.55	kJ/mol	27.0447 ± 0.0016	14604-48-9*0
Hydroxymethylium		717.67	709.73	± 0.19	kJ/mol	31.03337 ± 0.00088	18682-95-6*0
Hydroxymethylene		112.68	108.91	± 0.27	kJ/mol	30.02598 ± 0.00087	19710-56-6*1
Peroxyformic acid		-279.22	-288.57	± 0.88	kJ/mol	62.0248 ± 0.0012	107-32-4*1
1,2-Propadienyl anion		266.06	263.00	± 0.64	kJ/mol	39.0565 ± 0.0024	64066-06-4*0
Propadienylidene		554.43	555.58	± 0.40	kJ/mol	38.0480 ± 0.0024	60731-10-4*0
trans-2-Butene		9.46	-11.10	± 0.37	kJ/mol	56.1063 ± 0.0032	624-64-6*0
Cyclopentane		-43.68	-76.25	± 0.41	kJ/mol	70.1329 ± 0.0041	287-92-3*0
Vinoxy		23.04	16.24	± 0.57	kJ/mol	43.0446 ± 0.0016	6912-06-7*0
Propionaldehyde		-171.22	-186.62	± 0.24	kJ/mol	58.0791 ± 0.0025	123-38-6*0
Phenolate		-146.43	-161.90	± 0.84	kJ/mol	93.1038 ± 0.0048	3229-70-7*0
(1E)-Ethanimine		55.71	39.50	± 0.73	kJ/mol	43.0678 ± 0.0016	56003-81-7*0
Bromotrifluoromethane		-638.73	-650.84	± 0.40	kJ/mol	148.9099 ± 0.0013	75-63-8*0
Bromoform		79.7	53.5	± 1.0	kJ/mol	252.7306 ± 0.0031	75-25-2*0
Cyclopentadienyl		275.23	262.12	± 0.92	kJ/mol	65.0932 ± 0.0040	2143-53-5*0
Carbamoyl		-7.77	-14.17	± 0.74	kJ/mol	44.03272 ± 0.00087	2858-51-7*0
Tetrahedrane		547.70	539.30	± 0.91	kJ/mol	52.0746 ± 0.0032	157-39-1*0
Silylene		271.44	269.77	± 0.86	kJ/mol	30.10138 ± 0.00033	13825-90-6*2
Hydrogen sulfide		-17.34	-20.27	± 0.19	kJ/mol	34.0819 ± 0.0060	7783-06-4*0
Chlorine dioxide		101.41	98.94	± 0.29	kJ/mol	67.4515 ± 0.0011	10049-04-4*0
(E)-Diazene		207.12	199.98	± 0.41	kJ/mol	30.02936 ± 0.00020	15626-43-4*0
Peroxynitrous acid		-5.76	-14.20	± 0.36	kJ/mol	63.01288 ± 0.00091	14691-52-2*3
Ethylidene		373.61	366.38	± 0.57	kJ/mol	28.0532 ± 0.0016	4218-50-2*2
(E)-Iminomethyl		275.81	272.20	± 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
Water			-285.796	± 0.025	kJ/mol	18.01528 ± 0.00033	7732-18-5*590
1-Methylethenyl		263.01	252.61	± 0.62	kJ/mol	41.0718 ± 0.0024	15552-77-9*0
neo-Pentane		-134.23	-167.10	± 0.38	kJ/mol	72.1488 ± 0.0041	463-82-1*0
Trioxidane		-81.95	-90.79	± 0.62	kJ/mol	50.01408 ± 0.00091	14699-99-1*1
Ethenamine		69.27	54.71	± 0.69	kJ/mol	43.0678 ± 0.0016	593-67-9*0
Trimethylamine		2.23	-26.62	± 0.75	kJ/mol	59.1103 ± 0.0025	75-50-3*0
Dichloromethylene		229.88	231.07	± 0.64	kJ/mol	82.9161 ± 0.0020	1605-72-7*2
Trifluoromethylium		409.72	406.51	± 0.42	kJ/mol	69.00536 ± 0.00080	18851-76-8*0
Ethyl nitrite		-81.29	-100.02	± 0.87	kJ/mol	75.0666 ± 0.0017	109-95-5*1
Ozonide		-58.47	-60.82	± 0.21	kJ/mol	47.99875 ± 0.00090	12596-80-4*0
Hypobromite		-96.04	-103.53	± 0.54	kJ/mol	95.9039 ± 0.0010	14380-62-2*0
Azido radical		452.24	449.65	± 0.60	kJ/mol	42.02022 ± 0.00021	12596-60-0*0
Nitrous oxide		86.023	82.594	± 0.096	kJ/mol	44.01288 ± 0.00033	10024-97-2*0
Hydroxyoxomethylium		600.67	597.59	± 0.44	kJ/mol	45.0169 ± 0.0010	638-71-1*0
Hydroxyamidogen		101.26	94.42	± 0.80	kJ/mol	32.02202 ± 0.00034	13940-32-4*1
Hydrazoic acid		297.88	291.58	± 0.49	kJ/mol	43.02816 ± 0.00022	7782-79-8*0
Vinylidene		411.23	412.14	± 0.30	kJ/mol	26.0373 ± 0.0016	2143-69-3*0
Acetylium		666.65	659.36	± 0.42	kJ/mol	43.0441 ± 0.0016	15762-07-9*0
Aminomethylium		763.55	751.58	± 0.53	kJ/mol	30.04865 ± 0.00085	488821-23-4*0
Chloroacetylene		229.32	230.18	± 0.45	kJ/mol	60.4820 ± 0.0018	593-63-5*0
Fluoroacetylene		104.97	105.68	± 0.40	kJ/mol	44.0277 ± 0.0016	2713-09-9*0
Dioxidanide		-88.86	-91.52	± 0.35	kJ/mol	33.00729 ± 0.00060	14691-59-9*0
Peroxyformyl		-100.64	-105.95	± 0.93	kJ/mol	61.0168 ± 0.0012	56240-83-6*1
1-Propenyl		278.19	267.35	± 0.63	kJ/mol	41.0718 ± 0.0024	6067-68-1*2
Difluorodioxidane		35.33	31.60	± 0.40	kJ/mol	69.99561 ± 0.00060	7783-44-0*0
Ketenyl		177.06	178.15	± 0.54	kJ/mol	41.0287 ± 0.0016	51095-15-9*0
Formic acid		-371.05	-378.34	± 0.22	kJ/mol	46.0254 ± 0.0010	64-18-6*0
Acetic acid		-397.72	-412.13	± 0.52	kJ/mol	60.0520 ± 0.0017	64-19-7*2
Glycolaldehyde		-304.47	-317.74	± 0.90	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		-207.80	-213.43	± 0.55	kJ/mol	58.0361 ± 0.0017	107-22-2*1
(Methylamino)methyl		168.53	152.08	± 0.69	kJ/mol	44.0758 ± 0.0017	31277-24-4*0
Trichloromethyl		73.77	73.30	± 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
Acetophenone		-61.5	-84.7	± 1.0	kJ/mol	120.1485 ± 0.0064	98-86-2*0
Nitrosomethane		80.79	70.88	± 0.91	kJ/mol	45.04066 ± 0.00088	865-40-7*0
Isocyanoacetylene		484.7	486.9	± 1.0	kJ/mol	51.0468 ± 0.0024	66723-45-3*0
Cyclobutadiene		436.66	428.21	± 0.69	kJ/mol	52.0746 ± 0.0032	1120-53-2*0
Silanone		-93.8	-99.1	± 1.0	kJ/mol	46.10078 ± 0.00045	22755-01-7*0
Silyloxy		8.4	0.5	± 1.5	kJ/mol	47.10872 ± 0.00047	81429-20-1*0
Sulfur		276.90	279.14	± 0.14	kJ/mol	32.0660 ± 0.0060	7704-34-9*0
Chlorous acid		25.77	20.71	± 0.63	kJ/mol	68.4594 ± 0.0011	13898-47-0*0
Iodooxidanyl		127.00	125.07	± 0.82	kJ/mol	142.90387 ± 0.00030	14696-98-1*0
Carbon monoxide cation		1238.305	1241.585	± 0.026	kJ/mol	28.00955 ± 0.00085	12144-04-6*0
Hydrazine		111.72	97.57	± 0.42	kJ/mol	32.04524 ± 0.00031	302-01-2*0
Aminooxy		70.69	64.08	± 0.66	kJ/mol	32.02202 ± 0.00034	13408-29-2*0
Nitrate		-299.70	-306.25	± 0.22	kJ/mol	62.00549 ± 0.00090	14797-55-8*0
Methyleneamidogen		242.09	238.44	± 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
Formyl anion		11.59	11.98	± 0.44	kJ/mol	29.01859 ± 0.00086	57340-31-5*0
2-Propynylidyne		718.06	722.41	± 0.80	kJ/mol	37.0400 ± 0.0024	53590-28-6*0
iso-Pentane		-118.90	-152.95	± 0.39	kJ/mol	72.1488 ± 0.0041	78-78-4*0
1-Hydroxyethylidene		57.35	46.97	± 0.77	kJ/mol	44.0526 ± 0.0017	30967-49-8*21
Hypofluorite		-108.84	-108.67	± 0.48	kJ/mol	34.99835 ± 0.00030	12763-66-5*0
Dicarbon monoxide		377.12	381.16	± 0.83	kJ/mol	40.0208 ± 0.0016	12071-23-7*1
1-Propanol		-231.26	-255.10	± 0.24	kJ/mol	60.0950 ± 0.0025	71-23-8*0
Dimethylamidogen		174.79	157.45	± 0.91	kJ/mol	44.0758 ± 0.0017	15337-44-7*0
2-Iminoethyl		219.27	207.91	± 0.87	kJ/mol	42.0599 ± 0.0016	73843-90-0*2
Chloromethylene		320.36	320.64	± 0.89	kJ/mol	48.4713 ± 0.0012	2108-20-5*2
Dibromomethane		26.9	5.5	± 1.1	kJ/mol	173.8346 ± 0.0022	74-95-3*0
1,1-Difluoroethene		-343.49	-350.55	± 0.76	kJ/mol	64.0341 ± 0.0016	75-38-7*0
Fluorodioxidanyl		26.89	25.18	± 0.26	kJ/mol	50.99720 ± 0.00060	15499-23-7*0
Phenylacetylene		332.91	317.75	± 0.72	kJ/mol	102.1332 ± 0.0064	536-74-3*0
o-Tolualdehyde		-44.7	-66.9	± 1.1	kJ/mol	120.1485 ± 0.0064	529-20-4*0
Acetonyl		-18.49	-32.09	± 0.69	kJ/mol	57.0712 ± 0.0024	3122-07-4*0
3-Buten-2-one		-95.40	-111.64	± 0.85	kJ/mol	70.0898 ± 0.0032	78-94-4*1
Urea		-218.18	-234.58	± 0.42	kJ/mol	60.05534 ± 0.00091	57-13-6*0
Oxomethaniminium		695.31	688.75	± 0.90	kJ/mol	44.03217 ± 0.00087	59348-22-0*0
Acetamide		-219.59	-237.10	± 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
Disilanyl		242.7	230.6	± 1.6	kJ/mol	61.21070 ± 0.00069	73151-72-1*0
Disilene		288.7	280.0	± 1.9	kJ/mol	60.20276 ± 0.00066	15435-77-5*2
1,3-Hexadiyne		405.15	393.45	± 0.98	kJ/mol	78.1118 ± 0.0048	4447-21-6*0
(E)-1-Methylallyl		152.57	135.26	± 0.80	kJ/mol	55.0984 ± 0.0032	17787-86-9*0
Sulfuric acid			-892.16	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*839
Chlorine trifluoride		-158.63	-162.73	± 0.86	kJ/mol	92.44791 ± 0.00090	7790-91-2*0
Iodine monochloride		19.024	17.391	± 0.013	kJ/mol	162.35717 ± 0.00090	7790-99-0*0
Iodotrifluoromethane		-583.30	-589.18	± 0.45	kJ/mol	195.91038 ± 0.00080	2314-97-8*0
Trinitrogen cation		1519.41	1516.77	± 0.89	kJ/mol	42.01967 ± 0.00021	12185-03-4*0
Oxonitrate anion		88.11	88.15	± 0.25	kJ/mol	30.00669 ± 0.00031	14967-78-3*0
Nitrosyl ion		984.506	984.501	± 0.066	kJ/mol	30.00559 ± 0.00031	14452-93-8*0
Nitrogen sesquioxide		90.76	86.19	± 0.15	kJ/mol	76.01168 ± 0.00091	10544-73-7*0
Methylene anion		328.16	328.59	± 0.18	kJ/mol	14.02713 ± 0.00081	50928-07-9*0
Methylidyne anion		475.75	479.07	± 0.22	kJ/mol	13.01919 ± 0.00080	28604-54-8*0
Ethanium		874.33	858.07	± 0.62	kJ/mol	31.0764 ± 0.0017	24669-33-8*1
Dioxygen anion		-43.36	-42.72	± 0.17	kJ/mol	31.99935 ± 0.00060	11062-77-4*0
Hydrogen isocyanide		192.06	192.44	± 0.32	kJ/mol	27.02538 ± 0.00081	6914-07-4*0
iso-Propylium		822.95	805.86	± 0.23	kJ/mol	43.0871 ± 0.0024	19252-53-0*0
Carbonic acid		-602.53	-612.70	± 0.75	kJ/mol	62.0248 ± 0.0012	463-79-6*1
Cyclobutane		52.29	27.75	± 0.38	kJ/mol	56.1063 ± 0.0032	287-23-0*0
2-Butynyl		318.08	310.72	± 0.67	kJ/mol	53.0825 ± 0.0032	82252-88-8*0
1,2-Butadienyl		328.92	320.20	± 0.64	kJ/mol	53.0825 ± 0.0032	4777-46-2*0
Isoprene		96.25	75.73	± 0.66	kJ/mol	68.1170 ± 0.0040	78-79-5*0
1-Hydroxyethylium		608.73	594.31	± 0.38	kJ/mol	45.0600 ± 0.0017	18682-96-7*1
Ethynol		95.29	92.81	± 0.78	kJ/mol	42.0367 ± 0.0016	32038-79-2*2
Formyloxidanyl		-125.84	-127.50	± 0.55	kJ/mol	45.0174 ± 0.0010	16499-21-1*1
Methoxyethane		-194.78	-217.67	± 0.57	kJ/mol	60.0950 ± 0.0025	540-67-0*0
Chloronium		881.5	878.4	± 1.1	kJ/mol	37.46803 ± 0.00091	36658-55-6*0
1,1,1-Trichloroethane		-133.99	-144.56	± 0.51	kJ/mol	133.4033 ± 0.0031	71-55-6*0
Tetrachloroethene		-20.56	-21.42	± 0.99	kJ/mol	165.8322 ± 0.0039	127-18-4*0
Chlorodifluoromethane		-475.65	-481.84	± 0.99	kJ/mol	86.4681 ± 0.0012	75-45-6*0
Fluoromethylene		148.39	148.67	± 0.43	kJ/mol	32.01704 ± 0.00080	13453-52-6*2
Fluoroformyl		-176.63	-176.04	± 0.37	kJ/mol	47.00850 ± 0.00085	1871-24-5*0
2-Bromoethanol		-196.34	-220.40	± 0.53	kJ/mol	124.9645 ± 0.0019	540-51-2*0
Carbon suboxide		-94.5	-92.4	± 1.1	kJ/mol	68.0309 ± 0.0025	504-64-3*0
Benzyl		230.27	211.45	± 0.55	kJ/mol	91.1305 ± 0.0056	2154-56-5*0
Phenoxy		71.03	55.74	± 0.84	kJ/mol	93.1033 ± 0.0048	2122-46-5*0
m-Tolualdehyde		-49.1	-72.0	± 1.2	kJ/mol	120.1485 ± 0.0064	620-23-5*0
Propadienone		132.13	130.50	± 0.72	kJ/mol	54.0474 ± 0.0024	61244-93-7*0
2-Propynal		135.38	133.21	± 0.91	kJ/mol	54.0474 ± 0.0024	624-67-9*0
Cyanomethylene		479.9	483.2	± 1.1	kJ/mol	39.0361 ± 0.0016	2612-62-6*1
3-Methylenecyclopropene		395.97	388.03	± 0.83	kJ/mol	52.0746 ± 0.0032	4095-06-1*0
Phenylperoxy		153.5	136.5	± 1.4	kJ/mol	109.1027 ± 0.0049	91422-02-5*0
Trimethylsilane		-124.7	-150.8	± 1.6	kJ/mol	74.1970 ± 0.0025	993-07-7*0
1-Methyl-1-propenyl		239.98	223.81	± 0.67	kJ/mol	55.0984 ± 0.0032	71790-71-1*1
1-Butenyl		263.39	246.05	± 0.69	kJ/mol	55.0984 ± 0.0032	2669-61-6*2
Ammonium			-133.074	± 0.056	kJ/mol	18.03795 ± 0.00029	14798-03-9*800
Methanide		141.11	137.66	± 0.24	kJ/mol	15.03507 ± 0.00083	15194-58-8*0
Methyliumyl		1393.19	1394.05	± 0.11	kJ/mol	14.02603 ± 0.00081	15091-72-2*0
Ethylidyne		640.8	636.2	± 1.1	kJ/mol	27.0452 ± 0.0016	67624-57-1*2
Chlorine atom cation		1370.807	1372.603	± 0.0021	kJ/mol	35.45215 ± 0.00090	24203-47-2*0
Isocyanomethanide		254.18	251.14	± 0.90	kJ/mol	40.0446 ± 0.0016	81704-80-5*0
Hydroxyde			-229.752	± 0.025	kJ/mol	17.00789 ± 0.00031	14280-30-9*800
Peroxyformate		-341.14	-346.60	± 0.98	kJ/mol	61.0174 ± 0.0012	104960-05-6*1
n-Propylium		856.77	838.49	± 0.80	kJ/mol	43.0871 ± 0.0024	19252-52-9*0
1-Methylethylidene		316.03	302.13	± 0.98	kJ/mol	42.0797 ± 0.0024	40852-89-9*2
Cycloprop-2-enylium		1080.4	1075.3	± 1.0	kJ/mol	39.0554 ± 0.0024	26810-74-2*0
Hydrogen peroxide cation		897.29	890.31	± 0.51	kJ/mol	34.01413 ± 0.00062	12325-10-9*1
Cyclobutene		178.01	160.96	± 0.61	kJ/mol	54.0904 ± 0.0032	822-35-5*0
Trioxidanide		-120.0	-123.1	± 1.6	kJ/mol	49.00669 ± 0.00090	89965-38-8*2
1,3-Butadienyl		372.22	361.74	± 0.87	kJ/mol	53.0825 ± 0.0032	86181-68-2*11
Cyclohexane		-83.20	-122.76	± 0.29	kJ/mol	84.1595 ± 0.0049	110-82-7*0
Protonated oxirane		725.43	709.26	± 0.61	kJ/mol	45.0600 ± 0.0017	38607-31-70
Methoxymethylene		129.12	118.59	± 0.78	kJ/mol	44.0526 ± 0.0017	19527-10-7*21
Methanediol		-379.16	-393.36	± 0.74	kJ/mol	48.0413 ± 0.0010	463-57-0*1
Cyanic acid		-12.33	-15.04	± 0.43	kJ/mol	43.02478 ± 0.00086	420-05-3*0
Fulminic acid		170.71	169.26	± 0.44	kJ/mol	43.02478 ± 0.00086	51060-05-0*0
Isofulminic acid		235.24	233.53	± 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
Acetic acid		-418.53	-432.69	± 0.36	kJ/mol	60.0520 ± 0.0017	64-19-7*0
Acetyl chloride		-232.54	-241.53	± 0.39	kJ/mol	78.4973 ± 0.0019	75-36-5*0
Dioxoethyl		-63.15	-64.57	± 0.86	kJ/mol	57.0281 ± 0.0017	702699-38-5*0
Chlorohydroxymethyl		-54.9	-60.9	± 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		-488.97	-493.15	± 0.44	kJ/mol	120.9129 ± 0.0020	75-71-8*0
Fluorodichloromethane		-277.69	-283.15	± 0.90	kJ/mol	102.9224 ± 0.0020	75-43-4*0
Difluoromethylene		-193.88	-193.41	± 0.35	kJ/mol	50.00751 ± 0.00080	2154-59-8*2
Fluoromethylene		210.37	210.71	± 0.66	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
p-Tolualdehyde		-49.9	-72.9	± 1.2	kJ/mol	120.1485 ± 0.0064	104-87-0*0
o-Toluoyl		109.8	91.4	± 1.4	kJ/mol	119.1406 ± 0.0064	104680-89-9*0
1-Propen-2-ol-1-yl		101.57	89.34	± 0.87	kJ/mol	57.0712 ± 0.0024	1976041-84-5*11
Propyl nitrite		-95.9	-120.8	± 1.8	kJ/mol	89.0932 ± 0.0025	543-67-9*1
2-Cyanovinyl		447.79	445.30	± 0.99	kJ/mol	52.0547 ± 0.0024	189141-20-6*2
1,2,3-Butatrien-1-ylium		1271.8	1270.0	± 1.1	kJ/mol	51.0661 ± 0.0032	81932-79-8*2
1-Buten-3-yn-1-yl		547.26	544.59	± 0.87	kJ/mol	51.0666 ± 0.0032	2810-61-9*1
3-Buten-1-ynyl		628.5	626.3	± 1.0	kJ/mol	51.0666 ± 0.0032	108179-98-2*0
Hydroxysilyl		-104.3	-112.2	± 1.5	kJ/mol	47.10872 ± 0.00047	113648-09-2*0
Trimethylsilanol		-464.6	-490.9	± 1.9	kJ/mol	90.1964 ± 0.0025	1066-40-6*0
2-Aminoethyl		174.30	157.83	± 0.82	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
Sulfur monoxide		6.02	6.07	± 0.13	kJ/mol	48.0654 ± 0.0060	13827-32-2*0
Hypoiodite		-102.44	-104.25	± 0.88	kJ/mol	142.90442 ± 0.00030	15065-65-3*0
Dinitrogen cation		1503.311	1503.312	± 0.000	kJ/mol	28.01293 ± 0.00014	13966-04-6*0
Nitrogen atom cation		1872.908	1875.689	± 0.024	kJ/mol	14.006191 ± 0.000070	14158-23-7*0
Carbon dioxide cation		936.091	936.926	± 0.017	kJ/mol	44.00895 ± 0.00100	12181-61-2*0
Hydrazino		234.77	224.25	± 0.69	kJ/mol	31.03730 ± 0.00025	13598-46-4*0
Carbon anion		589.628	594.774	± 0.044	kJ/mol	12.01125 ± 0.00080	14337-00-9*0
Dichloride		-229.8	-228.7	± 1.4	kJ/mol	70.9059 ± 0.0018	12595-89-0*0
Hydrogen isocyanide cation		1351.53	1351.49	± 0.83	kJ/mol	27.02483 ± 0.00081	74158-11-5*0
Chlorooxy hypochlorite		134.58	131.34	± 0.56	kJ/mol	102.9042 ± 0.0019	12292-23-8*0
Methyloxonium		589.1	574.9	± 1.1	kJ/mol	33.04925 ± 0.00092	17836-08-7*0
Chlorine pentafluoride		-226.0	-234.1	± 1.3	kJ/mol	130.44472 ± 0.00090	13637-63-3*0
n-Propylide		123.1	105.5	± 1.2	kJ/mol	43.0882 ± 0.0024	59513-13-2*0
Allyl anion		133.96	122.95	± 0.22	kJ/mol	41.0723 ± 0.0024	1724-46-5*0
Cyclopropyl		303.88	291.25	± 0.90	kJ/mol	41.0718 ± 0.0024	2417-82-5*0
Propargylenide		434.4	437.0	± 1.1	kJ/mol	38.0485 ± 0.0024	82906-05-6*1
t-Butyl		75.32	50.02	± 0.76	kJ/mol	57.1143 ± 0.0033	1605-73-8*0
Peroxyhypochlorous acid		3.98	-1.29	± 0.95	kJ/mol	68.4594 ± 0.0011	67952-07-2*0
2-Butyn-1-yl anion		253.7	244.8	± 1.1	kJ/mol	53.0830 ± 0.0032	65114-66-1*0
Ethoxy		5.53	-8.90	± 0.43	kJ/mol	45.0605 ± 0.0017	2154-50-9*52
Ethenol		-108.96	-119.67	± 0.50	kJ/mol	44.0526 ± 0.0017	557-75-5*2
Oxiranyl		172.84	164.56	± 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
Oxoethylidene		261.1	257.6	± 1.1	kJ/mol	42.0367 ± 0.0016	39920-84-8*12
Methanediol		-369.01	-382.16	± 0.94	kJ/mol	48.0413 ± 0.0010	463-57-0*2
Dioxirane		9.41	1.74	± 0.53	kJ/mol	46.0254 ± 0.0010	157-26-6*0
Methoxyethene		-89.5	-107.4	± 1.1	kJ/mol	58.0791 ± 0.0025	107-25-5*2
2-Propanol		-248.67	-272.76	± 0.27	kJ/mol	60.0950 ± 0.0025	67-63-0*0
Methyl acetate		-363.3	-382.1	± 1.2	kJ/mol	74.0785 ± 0.0025	79-20-9*2
Carboxymethyl		-226.7	-236.6	± 1.1	kJ/mol	59.0440 ± 0.0017	2887-46-9*1
1-Iminoethyl		233.0	222.9	± 1.1	kJ/mol	42.0599 ± 0.0016	128365-64-0*2
Cyanoamidogen		322.95	320.46	± 0.84	kJ/mol	41.03212 ± 0.00082	12347-01-2*0
Chloromethylidyne		430.64	434.39	± 0.67	kJ/mol	47.4634 ± 0.0012	3889-76-7*0
Chloromethanol		-232.4	-242.7	± 1.2	kJ/mol	66.4866 ± 0.0013	15454-33-8*0
Chloromethoxy		-12.0	-18.9	± 1.1	kJ/mol	65.4787 ± 0.0012	114282-89-2*0
Tetrafluorosilane		-1608.81	-1614.32	± 0.53	kJ/mol	104.07911 ± 0.00030	7783-61-1*0
Fluorotrichloromethane		-283.31	-286.46	± 0.76	kJ/mol	137.3672 ± 0.0028	75-69-4*0
Hexafluoroethane		-1334.11	-1342.40	± 0.82	kJ/mol	138.0118 ± 0.0016	76-16-4*0
Formyl chloride		-179.87	-183.08	± 0.67	kJ/mol	64.4707 ± 0.0012	2565-30-2*0
2-Chloroethanol		-249.81	-266.53	± 0.59	kJ/mol	80.5132 ± 0.0019	107-07-3*0
Hydroperoxonium		738.2	727.9	± 1.2	kJ/mol	35.02207 ± 0.00064	70850-26-9*1
o-Benzyne		468.20	459.29	± 0.86	kJ/mol	76.0960 ± 0.0048	462-80-6*2
Tropyl		296.5	279.1	± 1.1	kJ/mol	91.1305 ± 0.0056	3551-27-7*0
m-Toluoyl		108.7	90.1	± 1.5	kJ/mol	119.1406 ± 0.0064	67958-04-7*0
Iodobenzene		178.46	162.47	± 0.99	kJ/mol	204.0084 ± 0.0048	591-50-4*0
1-Hydroxy-1-methylethyl		-78.29	-96.53	± 0.79	kJ/mol	59.0871 ± 0.0025	5131-95-3*0
Trifluoroethene		-493.0	-498.0	± 1.6	kJ/mol	82.0245 ± 0.0016	359-11-5*0
Isocyanoethene		285.19	278.69	± 0.94	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		448.20	445.74	± 0.97	kJ/mol	52.0547 ± 0.0024	189141-20-6*1
3-Methylene-1-cyclopropen-1-yl		628.2	625.6	± 1.1	kJ/mol	51.0666 ± 0.0032	127611-24-9*0
Fulvene		232.0	216.0	± 1.1	kJ/mol	78.1118 ± 0.0048	497-20-1*0
Oxosilylene		-98.36	-97.20	± 0.54	kJ/mol	44.08490 ± 0.00042	10097-28-6*0
Chloro hypochlorite		79.79	77.98	± 0.36	kJ/mol	86.9048 ± 0.0018	7791-21-1*0
Silyloxy anion		-311.9	-321.2	± 1.6	kJ/mol	47.10927 ± 0.00047	43336-62-5*0
Cyclobutyl		246.50	227.60	± 0.73	kJ/mol	55.0984 ± 0.0032	4548-06-5*0
1-Propanamine		-42.21	-69.95	± 0.42	kJ/mol	59.1103 ± 0.0025	107-10-8*0
Disulfur		127.50	127.81	± 0.27	kJ/mol	64.1320 ± 0.0120	23550-45-0*0
Sulfuric acid		-715.0	-729.1	± 1.2	kJ/mol	98.0795 ± 0.0061	7664-93-9*0
Sulfurous acid		-511.14	-521.35	± 0.89	kJ/mol	82.0801 ± 0.0061	7782-99-2*2
Sulfo		-366.5	-374.3	± 1.1	kJ/mol	81.0721 ± 0.0061	32750-86-0*0
Dioxodiazoxane		93.0	87.9	± 1.3	kJ/mol	76.01168 ± 0.00091	122413-35-8*1
Nitric acid			-206.56	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*800
Isodiazene		307.54	300.46	± 0.63	kJ/mol	30.02936 ± 0.00020	28647-38-3*0
Oxoammoniumyl		1092.47	1089.55	± 0.67	kJ/mol	31.01353 ± 0.00032	63559-87-5*0
Nitryl hydride		-36.5	-43.5	± 1.0	kJ/mol	47.01348 ± 0.00061	90266-90-3*0
Peroxynitrous acid		7.82	0.74	± 0.41	kJ/mol	63.01288 ± 0.00091	14691-52-2*1
Carbon cation		1797.857	1803.455	± 0.044	kJ/mol	12.01015 ± 0.00080	14067-05-1*0
Oxygen atom		246.844	249.229	± 0.0021	kJ/mol	15.99940 ± 0.00030	17778-80-2*1
Oxoniumyl ion		978.501	975.597	± 0.026	kJ/mol	18.01473 ± 0.00033	56583-62-1*0
Ethylidyne		508.60	504.90	± 0.80	kJ/mol	27.0452 ± 0.0016	67624-57-1*0
Ethynylium		1687.63	1690.97	± 0.16	kJ/mol	25.0288 ± 0.0016	16456-59-0*0
Methylamidogen anion		145.35	134.52	± 0.64	kJ/mol	30.04975 ± 0.00085	54448-39-4*0
Methylimidogen		323.0	315.3	± 1.1	kJ/mol	29.04126 ± 0.00083	27770-42-9*0
Iminomethylium		953.3	949.3	± 1.4	kJ/mol	28.03277 ± 0.00082	196216-36-1*0
Methylperoxy anion		-89.77	-99.91	± 0.57	kJ/mol	47.0339 ± 0.0010	35683-44-4*0
Propylidyne		492.6	483.0	± 1.2	kJ/mol	41.0718 ± 0.0024	85056-54-8*1
Cyclopropylidene		474.93	466.91	± 0.85	kJ/mol	40.0639 ± 0.0024	2143-70-6*1
Propargylium		1193.53	1190.71	± 0.32	kJ/mol	39.0554 ± 0.0024	21540-27-2*0
Cycloprop-1-enyl		527.45	523.06	± 0.58	kJ/mol	39.0559 ± 0.0024	19528-44-0*0
Cyclopropenylidene		497.08	496.11	± 0.45	kJ/mol	38.0480 ± 0.0024	16165-40-5*0
Propargylenide		436.9	439.5	± 1.1	kJ/mol	38.0485 ± 0.0024	82906-05-6*2
2-Propyn-1-ylium-1-ylidene		1598.1	1602.5	± 1.3	kJ/mol	37.0395 ± 0.0024	75104-46-0*0
1-Methylene-2-propenyl		327.11	317.11	± 0.75	kJ/mol	53.0825 ± 0.0032	1204515-52-5*0
Cyclopentene		59.60	35.34	± 0.46	kJ/mol	68.1170 ± 0.0040	142-29-0*0
n-Heptane		-145.36	-187.23	± 0.46	kJ/mol	100.2019 ± 0.0057	142-82-5*0
n-Octane		-160.98	-207.82	± 0.54	kJ/mol	114.2285 ± 0.0065	111-65-9*0
Methoxymethyl		13.19	0.63	± 0.91	kJ/mol	45.0605 ± 0.0017	16520-04-0*0
Trioxidane		-72.68	-81.17	± 0.82	kJ/mol	50.01408 ± 0.00091	14699-99-1*2
Oxoethanide		-43.9	-49.4	± 1.3	kJ/mol	43.0452 ± 0.0016	78944-68-0*0
Oxirene		273.19	271.03	± 0.92	kJ/mol	42.0367 ± 0.0016	157-18-6*2
Hydroxyformyl		-174.34	-177.36	± 0.50	kJ/mol	45.0174 ± 0.0010	2564-86-5*2
Hydroxyformyl anion		-319.55	-322.13	± 0.57	kJ/mol	45.0180 ± 0.0010	78944-70-4*2
Ethoxyethane		-223.72	-251.14	± 0.60	kJ/mol	74.1216 ± 0.0033	60-29-7*0
Water dimer		-491.016	-499.056	± 0.048	kJ/mol	36.03056 ± 0.00066	25655-83-8*0
Chloric acid		0.6	-6.5	± 1.1	kJ/mol	84.4588 ± 0.0013	7790-93-4*0
Ethyl formate		-375.1	-393.9	± 1.0	kJ/mol	74.0785 ± 0.0025	109-94-4*1
Propionic acid		-435.93	-453.82	± 0.59	kJ/mol	74.0785 ± 0.0025	79-09-4*1
Acetate		-496.06	-505.19	± 0.85	kJ/mol	59.0446 ± 0.0017	71-50-1*0
2-Hydrotrioxy		299.6	293.9	± 1.2	kJ/mol	49.00614 ± 0.00090	12500-78-60
(Methylimino)methyl		277.9	267.8	± 1.1	kJ/mol	42.0599 ± 0.0016	117928-23-1*1
1-Aziridinyl		313.7	301.5	± 1.4	kJ/mol	42.0599 ± 0.0016	23838-09-7*0
(Dimethylamino)methyl		166.1	143.1	± 1.3	kJ/mol	58.1024 ± 0.0025	30208-47-0*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		232.75	236.06	± 0.73	kJ/mol	94.9268 ± 0.0024	7572-29-4*0
Difluoromethylene		-193.88	-193.41	± 0.35	kJ/mol	50.00751 ± 0.00080	2154-59-8*0
Perchloryl		191.76	186.09	± 0.62	kJ/mol	83.4509 ± 0.0013	13932-10-0*0
1,1-Difluoroethane		-489.00	-502.72	± 0.53	kJ/mol	66.0500 ± 0.0016	75-37-6*0
2-Fluoroethanol		-405.73	-422.97	± 0.99	kJ/mol	64.0589 ± 0.0017	371-62-0*0
Chlorate		-208.2	-213.7	± 1.5	kJ/mol	83.4514 ± 0.0013	14866-68-3*0
Benzylide		142.03	123.12	± 0.41	kJ/mol	91.1310 ± 0.0056	18860-15-6*0
Cycloheptatriene		207.47	184.04	± 0.94	kJ/mol	92.1384 ± 0.0056	544-25-2*0
Ethylbenzene		58.38	29.91	± 0.54	kJ/mol	106.1650 ± 0.0064	100-41-4*0
Phenylethene		169.84	148.50	± 0.54	kJ/mol	104.1491 ± 0.0064	100-42-5*0
Benzonitrile		230.06	215.87	± 0.93	kJ/mol	103.1213 ± 0.0056	100-47-0*0
p-Toluoyl		107.8	89.2	± 1.5	kJ/mol	119.1406 ± 0.0064	67958-03-6*0
Acetonate		-187.57	-201.13	± 0.92	kJ/mol	57.0717 ± 0.0024	24262-31-5*0
Methyl nitrite		-55.54	-66.21	± 0.45	kJ/mol	61.0401 ± 0.0010	624-91-9*0
3-Oxo-1,2-propadien-1-yl		290.3	292.8	± 1.0	kJ/mol	53.0394 ± 0.0024	1198096-74-0*0
Fluoronium		774.04	771.10	± 0.91	kJ/mol	21.01373 ± 0.00014	12206-67-6*2
1-Cyanoethylidene		475.7	470.5	± 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		388.4	386.5	± 1.1	kJ/mol	51.0672 ± 0.0032	102275-54-7*0
Bromanylium		1257.770	1251.708	± 0.056	kJ/mol	79.90345 ± 0.00100	22541-56-6*0
Silylene		362.0	360.4	± 1.1	kJ/mol	30.10138 ± 0.00033	13825-90-6*1
Di-mu-hydrodihydrodisilicon		374.6	364.2	± 2.4	kJ/mol	60.20276 ± 0.00066	129970-82-7*12
Methylsilane		-9.57	-25.75	± 0.93	kJ/mol	46.14384 ± 0.00095	992-94-9*0
Trimethylsiloxy		-187.5	-210.5	± 2.0	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
2-Methylallyl		155.86	138.74	± 0.78	kJ/mol	55.0984 ± 0.0032	15157-95-6*0
3-Butenyl		223.14	206.64	± 0.91	kJ/mol	55.0984 ± 0.0032	2154-62-3*0
2-Methyl-1-propenyl		251.15	234.13	± 0.73	kJ/mol	55.0984 ± 0.0032	33825-33-1*0
N-Methylethanamine		-17.7	-45.8	± 1.1	kJ/mol	59.1103 ± 0.0025	624-78-2*0
Disulfene oxide		-50.48	-52.49	± 0.43	kJ/mol	80.1314 ± 0.0120	20901-21-7*0
Difluoride		-291.0	-290.2	± 1.5	kJ/mol	37.9973550 ± 0.0000010	12184-85-9*0
Sulfur hydroxide oxide		-473.9	-483.4	± 1.7	kJ/mol	97.0715 ± 0.0061	12337-07-4*1
Dioxaziridinyl		355.1	352.6	± 1.4	kJ/mol	46.00554 ± 0.00060	66252-29-7*0
Dinitrogen tetraoxide		20.19	10.90	± 0.14	kJ/mol	92.0111 ± 0.0012	10544-72-6*0
Nitroxyl		79.40	74.14	± 0.19	kJ/mol	62.00494 ± 0.00090	12033-49-7*0
Azanylium		944.274	937.319	± 0.029	kJ/mol	17.03001 ± 0.00022	19496-55-0*0
Trioxidanyl		25.36	23.38	± 0.13	kJ/mol	49.00614 ± 0.00090	12500-78-6*1
Iodine		107.157	106.757	± 0.0021	kJ/mol	126.904470 ± 0.000030	14362-44-8*1
Oxygen atom		436.665	438.523	± 0.0021	kJ/mol	15.99940 ± 0.00030	17778-80-2*2
Methyliumylidene		1619.762	1623.105	± 0.051	kJ/mol	13.01809 ± 0.00080	24361-82-8*0
Ethylidyne		508.60	504.90	± 0.80	kJ/mol	27.0452 ± 0.0016	67624-57-1*1
Vinylidene anion		364.03	363.84	± 0.50	kJ/mol	26.0378 ± 0.0016	66295-36-1*0
Cyanomethanide		114.16	111.33	± 0.59	kJ/mol	40.0446 ± 0.0016	21438-99-3*0
Hydrogen fluoride			-324.57	± 0.13	kJ/mol	20.006343 ± 0.000070	7664-39-3*955
Methanol cation		856.81	846.49	± 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		-596.69	-606.80	± 0.83	kJ/mol	62.0248 ± 0.0012	463-79-6*2
Carbonic acid		-561.44	-570.29	± 0.95	kJ/mol	62.0248 ± 0.0012	463-79-6*3
Propylidene		349.53	335.84	± 0.95	kJ/mol	42.0797 ± 0.0024	6700-78-3*1
Propylidyne		624.8	613.2	± 1.3	kJ/mol	41.0718 ± 0.0024	85056-54-8*2
1-Propynyl		528.53	526.36	± 0.65	kJ/mol	39.0559 ± 0.0024	89342-91-6*0
1-Propynylide		264.59	261.01	± 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
sec-Butyl		91.28	66.51	± 0.85	kJ/mol	57.1143 ± 0.0033	2348-55-2*0
t-Butyl anion		76.8	52.1	± 1.3	kJ/mol	57.1148 ± 0.0033	65114-21-8*0
Oxidanylium		1293.361	1293.390	± 0.026	kJ/mol	17.00679 ± 0.00031	12259-29-9*0
Hydroperoxymethyl		73.1	65.8	± 1.1	kJ/mol	47.0333 ± 0.0010	74087-87-9*0
2-Hydroxyethenyl		138.00	131.26	± 0.72	kJ/mol	43.0446 ± 0.0016	108665-16-3*21
Oxirene		387.8	383.6	± 1.4	kJ/mol	42.0367 ± 0.0016	157-18-6*11
Oxiranylidene		213.5	209.3	± 1.4	kJ/mol	42.0367 ± 0.0016	50983-85-2*2
Hydroxyformyl anion		-313.66	-315.47	± 0.57	kJ/mol	45.0180 ± 0.0010	78944-70-4*1
Ethoxyethene		-118.0	-141.8	± 1.5	kJ/mol	72.1057 ± 0.0033	109-92-2*2
1,1-Ethenediol		-307.66	-320.61	± 0.83	kJ/mol	60.0520 ± 0.0017	10375-04-9*1
1,2-Ethenediol		-272.81	-285.14	± 0.90	kJ/mol	60.0520 ± 0.0017	1571-60-4*1
Methoxyoxomethyl		-152.6	-160.7	± 1.2	kJ/mol	59.0440 ± 0.0017	16481-04-2*1
(Formyloxy)methyl		-151.5	-159.6	± 1.1	kJ/mol	59.0440 ± 0.0017	3122-12-1*1
Ethylene glycol		-369.66	-389.28	± 0.40	kJ/mol	62.0678 ± 0.0018	107-21-1*0
Hypochloroperoxoous acid, hydroxy ester		48.5	41.5	± 1.8	kJ/mol	84.4588 ± 0.0013	928652-99-7*1
Oxalic acid		-721.1	-731.7	± 1.2	kJ/mol	90.0349 ± 0.0020	144-62-7*0
(Methylamino)methyl cation		729.25	710.63	± 0.95	kJ/mol	44.0752 ± 0.0017	31277-24-40
(Methyleneamino)methyl anion		186.9	176.5	± 1.6	kJ/mol	42.0604 ± 0.0016	73859-26-4*0
Diazomethyl		468.18	465.63	± 0.98	kJ/mol	41.03212 ± 0.00082	20813-32-5*0
Isocyanoamidogen		490.3	488.3	± 1.5	kJ/mol	41.03212 ± 0.00082	947408-73-3*0
Bromotrichloromethane		-29.70	-38.85	± 0.54	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		118.45	115.38	± 0.87	kJ/mol	49.4793 ± 0.0012	6806-86-6*0
Methyl hypochlorite		-53.1	-63.1	± 1.4	kJ/mol	66.4866 ± 0.0013	593-78-2*0
1,2-Dichloroethane		-118.51	-130.45	± 0.54	kJ/mol	98.9586 ± 0.0024	107-06-2*0
Tetraiodomethane		320.9	315.8	± 2.0	kJ/mol	519.62858 ± 0.00081	507-25-5*0
Chlorofluoromethane		-256.47	-263.67	± 0.85	kJ/mol	68.4777 ± 0.0012	593-70-4*0
Difluoromethyliumyl		908.26	908.69	± 0.77	kJ/mol	50.00696 ± 0.00080	54250-40-7*0
Fluoromethyliumylidene		1123.08	1126.29	± 0.45	kJ/mol	31.00855 ± 0.00080	33412-11-2*0
1,2-Difluoroacetylene		2.85	5.68	± 0.64	kJ/mol	62.0182 ± 0.0016	689-99-6*0
Chloroformyl		-21.93	-20.53	± 0.49	kJ/mol	63.4628 ± 0.0012	2602-42-8*0
o-Benzyne anion		413.81	404.70	± 0.96	kJ/mol	76.0965 ± 0.0048	100569-88-8*0
Cycloheptene		28.44	-8.79	± 0.75	kJ/mol	96.1702 ± 0.0057	628-92-2*0
Benzoylium		763.5	749.4	± 1.3	kJ/mol	105.1135 ± 0.0056	19270-10-1*0
Benzoyl fluoride		-288.5	-304.9	± 1.3	kJ/mol	124.1124 ± 0.0056	455-32-3*0
Fluorobenzene cation		788.56	773.54	± 0.88	kJ/mol	96.1018 ± 0.0048	34468-25-2*0
Nitrosobenzene		216.7	199.7	± 1.2	kJ/mol	107.1100 ± 0.0048	586-96-9*0
1-Methylethoxy		-25.12	-43.88	± 0.75	kJ/mol	59.0871 ± 0.0025	3958-66-5*0
Nitromethyl		139.2	129.8	± 1.2	kJ/mol	60.0321 ± 0.0010	16787-85-2*0
2-Butanone		-216.87	-238.32	± 0.79	kJ/mol	72.1057 ± 0.0033	78-93-3*0
Methylketene		-54.7	-64.2	± 1.1	kJ/mol	56.0633 ± 0.0024	6004-44-0*0
Acrolein		-55.2	-65.6	± 1.2	kJ/mol	56.0633 ± 0.0024	107-02-8*1
Iodine monobromide		49.712	40.764	± 0.067	kJ/mol	206.8085 ± 0.0010	7789-33-5*0
Formaldoxime		30.5	19.9	± 1.3	kJ/mol	45.04066 ± 0.00088	75-17-2*1
1,3-Cyclobutadien-1-yl		653.8	649.3	± 1.1	kJ/mol	51.0666 ± 0.0032	127611-22-7*0
Bromochlorane		21.875	14.432	± 0.060	kJ/mol	115.3567 ± 0.0013	13863-41-7*0
Trioxygen difluoride		112.3	106.6	± 1.1	kJ/mol	85.99501 ± 0.00090	16829-28-0*1
Silylsilylene		317.2	309.4	± 2.0	kJ/mol	60.20276 ± 0.00066	50420-90-1*2
Trimethylsiloxide		-486.1	-509.9	± 2.1	kJ/mol	89.1890 ± 0.0025	41866-81-3*0
1,3-Pentadiyne		418.03	413.81	± 0.84	kJ/mol	64.0853 ± 0.0040	4911-55-1*0
1,4-Hexadiyne		424.7	414.7	± 1.3	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	± 1.6	kJ/mol	78.1118 ± 0.0048	177856-38-1*0
1-Aminoethyl		133.17	116.39	± 0.94	kJ/mol	44.0758 ± 0.0017	30208-36-7*0
Ethylamidogen		166.57	150.44	± 0.95	kJ/mol	44.0758 ± 0.0017	41084-92-8*0
2-Naphthyl anion		288.7	269.3	± 1.3	kJ/mol	127.1631 ± 0.0080	88760-89-8*0
1-Naphthyl anion		283.5	264.1	± 1.2	kJ/mol	127.1631 ± 0.0080	125254-29-7*0
Nitrosamine		84.99	76.11	± 0.96	kJ/mol	46.02876 ± 0.00036	35576-91-1*0
Butadiynyl		801.8	808.4	± 1.0	kJ/mol	49.0507 ± 0.0032	53561-65-2*0
Sulfur dioxide anion		-401.05	-403.31	± 0.75	kJ/mol	64.0653 ± 0.0060	12143-17-8*0
Sulfanyl		142.93	143.39	± 0.20	kJ/mol	33.0739 ± 0.0060	13940-21-1*0
Diazenyl		252.14	249.23	± 0.45	kJ/mol	29.02142 ± 0.00016	36882-13-0*0
Dioxidenium		1110.88	1107.99	± 0.11	kJ/mol	33.00619 ± 0.00060	12207-52-2*0
Hydroxyimidogen		217.86	214.98	± 0.77	kJ/mol	31.01408 ± 0.00032	35337-59-8*0
Iodine cation		1115.549	1115.149	± 0.0062	kJ/mol	126.903921 ± 0.000030	22541-93-1*0
Azide		193.52	190.02	± 0.91	kJ/mol	42.02077 ± 0.00021	14343-69-2*0
Peroxynitric acid		-42.6	-52.9	± 1.3	kJ/mol	79.0123 ± 0.0012	26404-66-0*0
Nitrosyl chloride		54.473	52.571	± 0.069	kJ/mol	65.45884 ± 0.00095	2696-92-6*0
Carbide		504.42	510.99	± 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
Hydrogen difluoride		-198.5	-198.4	± 1.2	kJ/mol	39.004746 ± 0.000070	12528-21-1*1
Bicyclo[1.1.0]buta-1,3-diene-2,4-diyl		1047.19	1054.79	± 0.68	kJ/mol	48.0428 ± 0.0032	12184-80-4*0
Methane cation		1150.679	1144.296	± 0.061	kJ/mol	16.04191 ± 0.00085	20741-88-2*0
Chlorine difluoride		-47.0	-48.2	± 1.4	kJ/mol	73.44951 ± 0.00090	24801-48-7*0
Ethanium		874.33	858.09	± 0.62	kJ/mol	31.0764 ± 0.0017	24669-33-8*0
Acetylene cation		1328.89	1328.22	± 0.13	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
Isocyanomethyl		363.6	361.1	± 1.1	kJ/mol	40.0440 ± 0.0016	70971-59-4*0
1H-Triazirin-1-yl		585.9	584.1	± 2.0	kJ/mol	42.02022 ± 0.00021	912535-95-6*0
Methyloxoniumylidene		1062.68	1054.86	± 0.57	kJ/mol	31.03337 ± 0.00088	58157-09-8*0
Hydroxymethylene		131.10	127.36	± 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
Isoformyl		217.25	217.63	± 0.69	kJ/mol	29.01804 ± 0.00086	71080-92-7*0
Hydroxyoxomethoxy		-360.80	-366.88	± 0.98	kJ/mol	61.0168 ± 0.0012	38330-85-7*0
3-Dioxiranone		-159.7	-162.4	± 1.7	kJ/mol	60.0089 ± 0.0012	94660-13-6*0
Carbonylbis(oxy) anion		-549.9	-551.9	± 1.4	kJ/mol	60.0094 ± 0.0012	16518-46-0*0
1-Methylethylidene		326.9	313.7	± 1.2	kJ/mol	42.0797 ± 0.0024	40852-89-9*1
Allylium		964.51	952.95	± 0.39	kJ/mol	41.0713 ± 0.0024	1724-44-3*0
1-Propenyl		280.27	269.44	± 0.77	kJ/mol	41.0718 ± 0.0024	6067-68-1*1
Bifluoride		-481.8	-480.6	± 1.9	kJ/mol	39.005295 ± 0.000070	18130-74-02
Cyclopropynyl		711.00	715.12	± 0.85	kJ/mol	37.0400 ± 0.0024	119178-99-3*0
n-Butyl anion		106.1	81.2	± 1.3	kJ/mol	57.1148 ± 0.0033	79431-01-9*0
sec-Butyl anion		103.3	78.8	± 1.3	kJ/mol	57.1148 ± 0.0033	79431-00-8*0
1,2-Butadienyl anion		255.7	246.1	± 1.1	kJ/mol	53.0830 ± 0.0032	65114-67-2*0
n-Hexane		-179.81	-198.46	± 0.33	kJ/mol	86.1754 ± 0.0049	110-54-3*500
1-Hydroxyethylium		610.8	596.3	± 1.1	kJ/mol	45.0600 ± 0.0017	18682-96-7*2
2-Hydroxyethyl		-11.01	-23.64	± 0.93	kJ/mol	45.0605 ± 0.0017	4422-54-2*2
Vinyl alcohol cation		778.5	767.3	± 1.2	kJ/mol	44.0520 ± 0.0017	57239-63-1*2
1-Hydroxyethylidene		69.97	59.46	± 0.86	kJ/mol	44.0526 ± 0.0017	30967-49-8*22
Oxiranylium		901.3	893.3	± 1.4	kJ/mol	43.0441 ± 0.0016	57789-76-1*2
Trioxidanylium		1070.4	1064.1	± 1.4	kJ/mol	49.00559 ± 0.00090	74241-49-9*1
C=O=C		653.0	657.3	± 1.5	kJ/mol	40.0208 ± 0.0016	12071-23-71
C=O=C		721.9	726.3	± 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
Ethyl hydroperoxide		-142.9	-161.4	± 1.2	kJ/mol	62.0678 ± 0.0018	3031-74-1*0
Formic acid cation		721.93	714.84	± 0.25	kJ/mol	46.0248 ± 0.0010	50614-05-6*1
Formyloxidanyl		-122.03	-125.37	± 0.55	kJ/mol	45.0174 ± 0.0010	16499-21-1*2
Chloryl hydride		197.7	191.2	± 1.6	kJ/mol	68.4594 ± 0.0011	174365-32-3*0
Water anion		31.3	29.8	± 3.1	kJ/mol	18.01583 ± 0.00033	12259-30-2*100
1-Methoxyethenol		-284.3	-303.7	± 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		-293.2	-309.8	± 1.3	kJ/mol	74.0785 ± 0.0025	7333-03-1*2
(Formyloxy)methyl		-135.9	-144.0	± 1.3	kJ/mol	59.0440 ± 0.0017	3122-12-1*2
Carboxymethyl		-206.1	-215.5	± 1.2	kJ/mol	59.0440 ± 0.0017	2887-46-9*2
Dimethylamide		122.9	104.5	± 1.4	kJ/mol	44.0763 ± 0.0017	34285-60-4*0
Ethylideneamidogen		209.6	199.2	± 1.1	kJ/mol	42.0599 ± 0.0016	28445-33-2*0
(Methyleneamino)methyl		244.2	233.5	± 1.3	kJ/mol	42.0599 ± 0.0016	56391-78-7*0
2-Aziridinyl		360.7	348.5	± 1.8	kJ/mol	42.0599 ± 0.0016	23838-09-71
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			-12.29	± 0.20	kJ/mol	141.93899 ± 0.00083	74-88-4*590
Iodide			-56.831	± 0.090	kJ/mol	126.905019 ± 0.000030	20461-54-5*800
Difluoromethylene		43.31	44.03	± 0.36	kJ/mol	50.00751 ± 0.00080	2154-59-8*1
Ethyl iodide		-9.38	-39.25	± 0.49	kJ/mol	155.9656 ± 0.0016	75-03-6*500
cis-1,2-Difluoroethene	$F/C=C\F$	-302.83	-309.60	± 0.89	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	± 1.4	kJ/mol	66.00691 ± 0.00085	479587-30-9*2
Dibromophosgene		-97.99	-113.93	± 0.37	kJ/mol	187.8181 ± 0.0022	593-95-3*0
Benzene		50.84	49.29	± 0.22	kJ/mol	78.1118 ± 0.0048	71-43-2*500
o-Benzyne		468.20	459.29	± 0.86	kJ/mol	76.0960 ± 0.0048	462-80-6*0
m-Benzyne		527.0	518.6	± 1.2	kJ/mol	76.0960 ± 0.0048	1828-89-3*2
p-Benzyne		587.1	577.6	± 1.2	kJ/mol	76.0960 ± 0.0048	3355-34-8*2
Hydrogen bromide			-120.88	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*800
Cycloheptane		-72.49	-117.99	± 0.53	kJ/mol	98.1861 ± 0.0057	291-64-5*0
Dinitrogen pentoxide		24.35	14.77	± 0.30	kJ/mol	108.0105 ± 0.0015	10102-03-1*0
Formylethynyl		468.4	470.3	± 1.3	kJ/mol	53.0394 ± 0.0024	277743-00-7*0
2-Cyclopropen-1-one		163.8	159.9	± 1.2	kJ/mol	54.0474 ± 0.0024	2961-80-0*0
Cyanovinylidene		581.7	584.2	± 1.2	kJ/mol	51.0468 ± 0.0024	70277-81-5*0
Isocyanovinylidene		697.0	700.3	± 1.4	kJ/mol	51.0468 ± 0.0024	737788-76-0*0
Cyanoacetylide		300.3	305.6	± 1.2	kJ/mol	50.0394 ± 0.0024	12373-53-4*0
Isocyanoethene		285.19	278.69	± 0.94	kJ/mol	53.0627 ± 0.0024	14668-82-7*1
1-Cyanoethylidene		437.5	433.8	± 1.5	kJ/mol	53.0627 ± 0.0024	498544-34-6*1
Bromonium		924.2	913.4	± 3.0	kJ/mol	81.9193 ± 0.0010	36658-54-5*0
Isocyanomethylene		582.3	583.6	± 1.7	kJ/mol	39.0361 ± 0.0016	78694-65-2*1
2-Methyl-2-cyclopropen-1-ylidene		448.0	441.8	± 1.2	kJ/mol	52.0746 ± 0.0032	185841-59-2*2
1,2,3-Butatrien-1-ylium		1425.8	1426.1	± 1.3	kJ/mol	51.0661 ± 0.0032	81932-79-8*1
But-1-en-3-yn-1-ide		419.7	418.5	± 1.2	kJ/mol	51.0672 ± 0.0032	119611-65-3*2
But-3-en-1-yn-1-ide		326.6	323.6	± 1.4	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		186.6	180.7	± 1.3	kJ/mol	74.5086 ± 0.0026	624-65-7*0
Dioxosilane		-278.0	-279.3	± 2.0	kJ/mol	60.08430 ± 0.00067	7631-86-9*0
Silylidyne		371.31	373.11	± 0.76	kJ/mol	29.09344 ± 0.00031	13774-94-2*0
Benzvalene		404.4	386.7	± 1.2	kJ/mol	78.1118 ± 0.0048	659-85-8*0
Bromo hypobromite		120.9	104.4	± 1.2	kJ/mol	175.8074 ± 0.0020	21308-80-5*0
Bromide			-120.88	± 0.14	kJ/mol	79.90455 ± 0.00100	24959-67-9*800
2-Naphthalenyl		416.7	397.1	± 1.4	kJ/mol	127.1626 ± 0.0080	10237-50-0*0
1-Naphthalenyl		418.0	398.4	± 1.3	kJ/mol	127.1626 ± 0.0080	2510-51-2*0
Phenanthrene		231.88	203.07	± 0.80	kJ/mol	178.2292 ± 0.0112	85-01-8*0
Aniline		108.83	86.81	± 0.72	kJ/mol	93.1265 ± 0.0048	62-53-3*0
Pyruvic acid		-521.1	-535.5	± 1.1	kJ/mol	88.0621 ± 0.0026	127-17-3*0
Sulfuric acid		-811.81	-813.80	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*500
Hydroxyaminiumyl		1161.1	1158.2	± 1.4	kJ/mol	31.01353 ± 0.00032	63559-88-6*0
Hydroxyamidogen		123.3	116.7	± 1.7	kJ/mol	32.02202 ± 0.00034	13940-32-4*2
Hydroxyaminylium		1019.5	1012.3	± 2.5	kJ/mol	32.02147 ± 0.00034	66097-71-0*1
Dioxyamidogen		240.5	233.8	± 1.8	kJ/mol	47.01348 ± 0.00061	71843-95-3*2
Peroxynitrous acid		-0.14	-7.19	± 0.53	kJ/mol	63.01288 ± 0.00091	14691-52-2*2
Dihydrogen fluoride anion		133.2	131.9	± 1.6	kJ/mol	21.01483 ± 0.00014	117339-92-1*1
Dioxiranylidene		190.3	191.1	± 1.4	kJ/mol	44.00950 ± 0.00100	138832-57-2*0
Methylidyne		592.837	596.171	± 0.097	kJ/mol	13.01864 ± 0.00080	3315-37-5*1
2-Hydrotrioxy cation		1298.2	1291.5	± 1.5	kJ/mol	49.00559 ± 0.00090	74241-49-90
Chlorine difluoride cation		998.9	996.7	± 1.7	kJ/mol	73.44896 ± 0.00090	32629-46-2*0
Deuterium atom		219.804	221.717	± 0.000	kJ/mol	2.01410177800 ± 0.00000000040	16873-17-9*0
Methylammonium		628.5	609.6	± 1.4	kJ/mol	32.06453 ± 0.00091	17000-00-9*0
Aminomethylene		245.9	238.1	± 1.5	kJ/mol	29.04126 ± 0.00083	35430-17-2*0
Methyleneamidogen anion		192.86	189.10	± 0.88	kJ/mol	28.03387 ± 0.00082	28892-56-0*0
(Z)-Iminomethyl		294.54	291.05	± 0.89	kJ/mol	28.03332 ± 0.00082	54980-11-9*0
Aminomethylidyne		372.0	368.4	± 1.1	kJ/mol	28.03332 ± 0.00082	84654-89-7*0
Hydrogen difluoride cation		1174.3	1171.3	± 1.5	kJ/mol	39.004198 ± 0.000070	126950-54-70
Xenon cation		1170.354	1170.354	± 0.0062	kJ/mol	131.2895 ± 0.0200	24203-25-6*0
Ethynylamidogen		395.50	393.47	± 0.97	kJ/mol	40.0440 ± 0.0016	73456-14-1*0
Methyleneoxonium		152.46	144.15	± 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
Chlorine chlorite		168.6	166.2	± 1.3	kJ/mol	102.9042 ± 0.0019	105206-44-8*3
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
Peroxyformic acid		-265.2	-273.2	± 1.6	kJ/mol	62.0248 ± 0.0012	107-32-4*2
Hydrogen carbonate		-716.9	-723.3	± 1.4	kJ/mol	61.0174 ± 0.0012	71-52-3*0
Hydroperoxycarbonyl		-73.5	-77.3	± 1.7	kJ/mol	61.0168 ± 0.0012	153751-35-0*0
Propan-1-yl-3-ylidene		554.4	545.7	± 1.3	kJ/mol	41.0718 ± 0.0024	50457-59-52
1-Propenylidene		392.3	388.0	± 1.1	kJ/mol	40.0639 ± 0.0024	70277-78-0*1
Bifluoride		-68.0	-67.6	± 1.6	kJ/mol	39.005295 ± 0.000070	18130-74-01
Cycloprop-2-enyl		490.29	485.74	± 0.58	kJ/mol	39.0559 ± 0.0024	28933-84-8*0
2-Propen-1-yl-3-ylidene		556.63	554.37	± 0.89	kJ/mol	39.0559 ± 0.0024	202744-74-9*0
2-Propynylidyne anion		540.07	544.85	± 0.82	kJ/mol	37.0406 ± 0.0024	82893-67-2*0
Chlorosyl hydride		141.9	139.0	± 1.7	kJ/mol	52.46004 ± 0.00095	71572-35-5*0
t-Butylium		734.02	710.74	± 0.98	kJ/mol	57.1137 ± 0.0033	14804-25-2*0
iso-Butyl		97.21	73.22	± 0.91	kJ/mol	57.1143 ± 0.0033	4630-45-9*0
Methylcyclopropane		47.8	24.6	± 1.3	kJ/mol	56.1063 ± 0.0032	594-11-6*0
Aquachlorine cation		822.0	815.1	± 1.8	kJ/mol	53.46743 ± 0.00096	142599-65-3*0
1,2-Butadienylium		1099.2	1089.8	± 1.2	kJ/mol	53.0820 ± 0.0032	65114-67-22
Oxofluoronium		1342.66	1342.61	± 0.80	kJ/mol	34.99725 ± 0.00030	12763-67-6*0
2,2-Dimethylbutane		-145.27	-185.69	± 0.75	kJ/mol	86.1754 ± 0.0049	75-83-2*0
n-Nonane		-176.15	-227.94	± 0.50	kJ/mol	128.2551 ± 0.0073	111-84-2*0
Ethanol		-269.74	-277.51	± 0.21	kJ/mol	46.0684 ± 0.0017	64-17-5*500
Oxygen anion monohydrate		-239.0	-244.3	± 3.0	kJ/mol	34.01523 ± 0.00062	31748-17-1*0
Vinyl alcohol cation		786.56	775.34	± 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		-152.96	-160.02	± 0.57	kJ/mol	43.0452 ± 0.0016	35731-40-9*0
Oxiranyl anion		121.3	113.3	± 1.5	kJ/mol	43.0452 ± 0.0016	72722-59-9*2
Ketene		-45.36	-48.42	± 0.11	kJ/mol	42.0367 ± 0.0016	463-51-4*2
COC vdW		589.7	598.5	± 1.5	kJ/mol	40.0208 ± 0.0016	12071-24-81
Oxirene		389.9	385.7	± 1.4	kJ/mol	42.0367 ± 0.0016	157-18-6*12
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		-221.18	-221.40	± 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		-295.5	-315.0	± 1.2	kJ/mol	74.0785 ± 0.0025	44169-27-9*11
2-Methoxy-2-oxoethyl		-203.0	-218.2	± 1.5	kJ/mol	73.0706 ± 0.0025	54668-31-4*1
(Acetyloxy)methyl		-200.2	-214.0	± 1.5	kJ/mol	73.0706 ± 0.0025	2887-49-2*1
Glyoxal		-207.80	-213.36	± 0.55	kJ/mol	58.0361 ± 0.0017	107-22-2*0
1-Aminoethenyl		294.7	286.0	± 1.1	kJ/mol	42.0599 ± 0.0016	180385-92-6*0
Dimethylmethyleneammonium		696.7	671.7	± 1.3	kJ/mol	58.1018 ± 0.0025	28149-27-1*0
Trichloromethide		-123.2	-122.7	± 2.0	kJ/mol	118.3693 ± 0.0028	14478-07-0*0
2-Hydrotrioxy anion		27.5	21.8	± 1.4	kJ/mol	49.00669 ± 0.00090	89965-38-80
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
Hydrogen fluoride			-334.70	± 0.15	kJ/mol	20.006343 ± 0.000070	7664-39-3*800
Triiodide			-51.30	± 0.80	kJ/mol	380.713959 ± 0.000090	14900-04-0*800
Bromodichloromethane		-35.0	-46.7	± 1.2	kJ/mol	163.8280 ± 0.0022	75-27-4*0
Peroxychlorous acid		95.4	89.4	± 2.0	kJ/mol	84.4588 ± 0.0013	177778-92-6*1
Difluorodibromomethane		-360.4	-378.5	± 1.3	kJ/mol	209.8155 ± 0.0022	75-61-6*0
Dichlorodibromomethane		27.5	11.6	± 1.3	kJ/mol	242.7241 ± 0.0028	594-18-3*0
Difluorobromomethane		-411.12	-424.31	± 0.46	kJ/mol	130.9194 ± 0.0013	1511-62-2*0
Fluoride			-334.70	± 0.15	kJ/mol	18.99895178 ± 0.00000050	16984-48-8*800
Nitrosodioxaziridine		413.7	407.7	± 1.8	kJ/mol	76.01168 ± 0.00091	132871-99-9*1
Trioxidaniumyl		925.5	916.3	± 1.5	kJ/mol	50.01353 ± 0.00091	161321-37-5*2
1,2-Difluoroethane		-434.39	-447.82	± 0.80	kJ/mol	66.0500 ± 0.0016	624-72-6*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		1251.2	1238.1	± 1.6	kJ/mol	77.1034 ± 0.0048	17333-73-2*1
Benzylium		929.69	910.19	± 0.55	kJ/mol	91.1299 ± 0.0056	6711-19-9*0
Fluorohydrochlorine cation		975.3	972.3	± 2.0	kJ/mol	55.45849 ± 0.00090	70110-64-4*0
Benzoyl chloride			-157.08	± 0.26	kJ/mol	140.5667 ± 0.0057	98-88-4*500
Benzoyl chloride		-90.1	-105.4	± 1.2	kJ/mol	140.5667 ± 0.0057	98-88-4*0
Perchloric acid		11.7	0.3	± 1.3	kJ/mol	100.4582 ± 0.0015	7601-90-3*0
Dioxosilane		-906.75	-911.73	± 0.64	kJ/mol	60.08430 ± 0.00067	7631-86-9*505
Chlorobenzene cation		942.61	928.68	± 0.61	kJ/mol	112.5561 ± 0.0049	55450-32-3*0
Chlorobenzene			11.36	± 0.59	kJ/mol	112.5566 ± 0.0049	108-90-7*500
m-Chlorophenyl		321.3	310.6	± 1.6	kJ/mol	111.5487 ± 0.0049	3474-40-6*0
p-Chlorophenyl		324.2	313.4	± 1.6	kJ/mol	111.5487 ± 0.0049	2396-00-1*0
o-Chlorophenyl		328.5	317.8	± 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		113.6	113.6	± 1.1	kJ/mol	204.0084 ± 0.0048	591-50-4*500
Nitrobenzene		82.1	62.1	± 1.4	kJ/mol	123.1094 ± 0.0049	98-95-3*0
3-Methylenecyclopropene cation		1181.7	1174.6	± 1.2	kJ/mol	52.0740 ± 0.0032	79105-72-9*0
1-Hydroxy-1-methylethyl cation		521.3	501.0	± 1.2	kJ/mol	59.0865 ± 0.0025	5131-95-30
1-Hydroxypropyl		-55.4	-73.1	± 1.1	kJ/mol	59.0871 ± 0.0025	5723-77-3*0
1,3-Butadien-2-ol		-53.4	-70.4	± 1.5	kJ/mol	70.0898 ± 0.0032	59120-04-6*11
Ethenedione		14.5	17.0	± 1.2	kJ/mol	56.0202 ± 0.0017	4363-38-6*0
Formaldonitrone		78.4	67.1	± 1.4	kJ/mol	45.04066 ± 0.00088	67353-84-8*0
(E)-Diazene cation		1132.49	1125.55	± 0.64	kJ/mol	30.02881 ± 0.00020	59952-06-6*0
(Z)-Diazene	$[H]/N=N\[H]$	228.83	221.69	± 0.63	kJ/mol	30.02936 ± 0.00020	15626-42-3*0
2-Cyclopropen-1-imine		401.9	394.1	± 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
Vinylvinylidene		494.1	488.8	± 1.7	kJ/mol	52.0746 ± 0.0032	148759-16-4*2
But-1-en-3-yn-1-ide		422.3	421.0	± 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
Silicon carbide		740.4	745.3	± 2.4	kJ/mol	40.09620 ± 0.00085	409-21-2*0
Silicon carbide		-70.7	-71.7	± 1.5	kJ/mol	40.09620 ± 0.00085	409-21-2*501
Silanide		69.4	63.8	± 1.4	kJ/mol	31.10987 ± 0.00037	15807-96-2*0
Dimethylsilanone		-237.2	-252.7	± 2.3	kJ/mol	74.1539 ± 0.0017	47956-45-6*0
Dimethylsilane		-66.1	-87.6	± 1.2	kJ/mol	60.1704 ± 0.0017	1111-74-6*0
Hydroxysilyl anion		-219.3	-227.3	± 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
Propargylallene		431.4	419.8	± 1.4	kJ/mol	78.1118 ± 0.0048	33142-15-3*3
Chlorine fluoride cation		1165.52	1165.70	± 0.49	kJ/mol	54.45055 ± 0.00090	12432-44-9*0
Ethylamidogen anion		106.47	88.82	± 0.82	kJ/mol	44.0763 ± 0.0017	54448-40-7*0
Diacetylide		460.9	465.9	± 1.0	kJ/mol	49.0513 ± 0.0032	59012-21-4*0
Oxygen cation monohydrate		1153.3	1147.8	± 3.3	kJ/mol	34.01413 ± 0.00062	31748-17-10
Oxywater		64.9	58.4	± 1.3	kJ/mol	34.01468 ± 0.00062	171363-09-0*0
Sulfur trioxide anion		-604.4	-610.0	± 2.8	kJ/mol	80.0647 ± 0.0061	12210-38-7*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
1,3-Butadiyne-1,4-diyl		1052.35	1062.32	± 0.65	kJ/mol	48.0428 ± 0.0032	78015-07-3*0
Chlorosyl chloride		134.5	133.2	± 1.4	kJ/mol	86.9048 ± 0.0018	86825-56-1*0
Hydrogen difluoride		-187.4	-187.1	± 1.6	kJ/mol	39.004746 ± 0.000070	12528-21-1*2
Ethylene cation		1075.21	1067.99	± 0.12	kJ/mol	28.0526 ± 0.0016	34470-02-5*0
Trihydrogen dioxide anion		-487.4	-495.7	± 1.1	kJ/mol	35.02317 ± 0.00064	12501-19-8*0
Vinylidene		610.45	610.15	± 0.50	kJ/mol	26.0373 ± 0.0016	2143-69-3*1
Iminomethide		237.4	233.6	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*1
Ammonium nitrate		-350.21	-365.17	± 0.18	kJ/mol	80.04344 ± 0.00095	6484-52-2*500
Cyanogen iodide anion		86.5	88.9	± 8.1	kJ/mol	152.92246 ± 0.00080	1356929-44-6*0
Methanol		-235.28	-238.62	± 0.16	kJ/mol	32.04186 ± 0.00090	67-56-1*500
Formaldehyde cation		944.853	941.232	± 0.097	kJ/mol	30.02543 ± 0.00087	54288-05-0*0
Hydrogen fluoride			-321.70	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*815
Nitrous acid		-71.36	-77.71	± 0.26	kJ/mol	47.01348 ± 0.00061	7782-77-6*2
Isoformyl anion		267.4	268.0	± 1.6	kJ/mol	29.01859 ± 0.00086	81747-63-9*2
Azidonitrene		692.1	687.5	± 1.4	kJ/mol	56.02696 ± 0.00028	147363-92-6*2
Carbonic acid		-602.53	-611.84	± 0.75	kJ/mol	62.0248 ± 0.0012	463-79-6*0
Allene cation		1132.20	1125.04	± 0.23	kJ/mol	40.0633 ± 0.0024	65812-77-3*0
2-Propenylidene		417.4	409.9	± 1.5	kJ/mol	40.0639 ± 0.0024	19527-08-3*11
2-Propenylidene		452.62	445.49	± 0.90	kJ/mol	40.0639 ± 0.0024	19527-08-3*2
Ammonia			-80.882	± 0.053	kJ/mol	17.03056 ± 0.00022	7664-41-7*1000
Nitronium		961.80	958.25	± 0.20	kJ/mol	46.00499 ± 0.00060	14522-82-8*0
Cycloprop-1-enylide		373.6	369.2	± 1.7	kJ/mol	39.0565 ± 0.0024	80251-77-0*0
2-Cyclopropen-1-ylium-1-yl		1382.0	1381.0	± 1.1	kJ/mol	38.0474 ± 0.0024	85398-75-0*0
Propynylidene		597.7	599.4	± 1.3	kJ/mol	38.0480 ± 0.0024	67152-18-5*3
Propenediylidene		796.2	797.4	± 1.4	kJ/mol	38.0480 ± 0.0024	60731-11-5*0
n-Butylium		827.4	803.1	± 1.2	kJ/mol	57.1137 ± 0.0033	25453-90-1*0
2-Butynylium		1085.8	1077.6	± 1.3	kJ/mol	53.0820 ± 0.0032	64235-83-2*2
1-Methylene-2-propenyl anion		256.4	246.5	± 1.4	kJ/mol	53.0830 ± 0.0032	64480-63-3*0
Oxochloronium		1150.86	1150.70	± 0.66	kJ/mol	51.45155 ± 0.00095	12301-79-0*0
Hydroxydioxonitrate		-193.2	-197.5	± 2.4	kJ/mol	63.01343 ± 0.00091	58875-09-5*0
1,3-Butadienyl anion		265.3	255.0	± 1.5	kJ/mol	53.0830 ± 0.0032	65114-68-3*0
n-Decane		-192.08	-248.82	± 0.80	kJ/mol	142.2817 ± 0.0081	124-18-5*0
Ethyloxoniumyl		783.3	766.4	± 1.7	kJ/mol	46.0679 ± 0.0017	34480-55-2*0
1-Hydroxyethyl		-41.50	-54.97	± 0.92	kJ/mol	45.0605 ± 0.0017	2348-46-1*2
1-Hydroxyethylium		608.73	594.31	± 0.38	kJ/mol	45.0600 ± 0.0017	18682-96-7*0
2-Hydroxyethylium		1019.1	1006.3	± 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		831.96	821.99	± 0.23	kJ/mol	44.0520 ± 0.0017	36505-03-0*0
1-Hydroxyethylidene		184.9	175.5	± 1.4	kJ/mol	44.0526 ± 0.0017	30967-49-8*1
Methoxymethylene		245.3	235.8	± 1.4	kJ/mol	44.0526 ± 0.0017	19527-10-7*1
1-Hydroxyethenyl		121.32	114.94	± 0.87	kJ/mol	43.0446 ± 0.0016	81847-74-7*0
Peroxyimidogen		405.4	403.4	± 1.9	kJ/mol	46.00554 ± 0.00060	60488-31-50
Oxiranylium		1233.6	1226.6	± 1.6	kJ/mol	43.0441 ± 0.0016	57789-76-1*1
Oxiranyl anion		141.1	135.0	± 1.6	kJ/mol	43.0452 ± 0.0016	72722-59-9*1
Acetic acid			-485.10	± 0.27	kJ/mol	60.0520 ± 0.0017	64-19-7*800
Ketenyl anion		-48.47	-47.55	± 0.82	kJ/mol	41.0293 ± 0.0016	64066-01-9*0
Dicarbon monoxide anion		154.18	157.82	± 0.83	kJ/mol	40.0213 ± 0.0016	87191-88-6*0
Dicarbon monoxide		440.22	444.55	± 0.83	kJ/mol	40.0208 ± 0.0016	12071-23-7*2
COC vdW		726.3	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	554.1	± 1.7	kJ/mol	40.0213 ± 0.0016	87191-88-60
Oxirene cation		1106.3	1102.6	± 1.9	kJ/mol	42.0361 ± 0.0016	94664-69-4*0
Ethynol		400.0	397.6	± 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
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
Hydrogen fluoride			-321.90	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*820
Isocyanic acid cation		1002.99	1000.32	± 0.49	kJ/mol	43.02423 ± 0.00086	444010-28-0*0
Fulminic acid cation		1215.6	1212.9	± 1.3	kJ/mol	43.02423 ± 0.00086	114766-65-3*0
Oxadiazirene		351.7	349.9	± 1.7	kJ/mol	44.01288 ± 0.00033	227934-45-4*0
Dihydrogen cation		1488.364	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*0
1,2-Ethenediol		-254.0	-266.4	± 1.3	kJ/mol	60.0520 ± 0.0017	1571-60-4*2
Acetyl chloride			-272.09	± 0.39	kJ/mol	78.4973 ± 0.0019	75-36-5*500
Methyl formate			-388.57	± 0.68	kJ/mol	60.0520 ± 0.0017	107-31-3*500
Ethyl formate		-355.4	-374.6	± 1.4	kJ/mol	74.0785 ± 0.0025	109-94-4*2
Acetoxy		-182.21	-191.03	± 0.85	kJ/mol	59.0440 ± 0.0017	13799-69-4*1
NON		545.5	542.6	± 1.7	kJ/mol	44.01288 ± 0.00033	227934-46-5*0
2-Methoxy-2-oxoethyl		-172.9	-188.1	± 1.7	kJ/mol	73.0706 ± 0.0025	54668-31-4*2
(Acetyloxy)methyl		-173.9	-186.9	± 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
Isocyanomethylidyne		672.2	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
Tetrachloromethane		-104.62	-124.04	± 0.41	kJ/mol	153.8215 ± 0.0037	56-23-5*500
Hydrogen chloride			-166.989	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*800
Dichloromethylene anion		75.99	78.27	± 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	-42.5	± 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
Chloromethylene		346.24	346.54	± 0.89	kJ/mol	48.4713 ± 0.0012	2108-20-5*1
1,2-Dichloroethane			-165.66	± 0.56	kJ/mol	98.9586 ± 0.0024	107-06-2*500
Chloride			-166.989	± 0.023	kJ/mol	35.45325 ± 0.00090	16887-00-6*800
1,1-Dichloroethane			-163.76	± 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
Chloroform			-130.95	± 0.42	kJ/mol	119.3767 ± 0.0028	67-66-3*590
Chlorodibromomethane		21.4	2.6	± 3.5	kJ/mol	208.2793 ± 0.0023	124-48-1*0
Bromochloromethane		-28.3	-42.4	± 1.3	kJ/mol	129.3833 ± 0.0016	74-97-5*0
Fluoromethylene		148.39	148.67	± 0.43	kJ/mol	32.01704 ± 0.00080	13453-52-6*0
Ethyl iodide		8.73	-7.14	± 0.49	kJ/mol	155.9656 ± 0.0016	75-03-6*0
1,2-Dibromoacetylene		332.4	321.5	± 2.3	kJ/mol	183.8294 ± 0.0026	624-61-3*0
Fluoro(fluorooxy)methylene		-97.5	-95.7	± 1.6	kJ/mol	66.00691 ± 0.00085	479587-30-9*101
Fluorooxomethylium		724.9	724.6	± 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
Benzene cation		992.64	976.17	± 0.22	kJ/mol	78.1113 ± 0.0048	34504-50-2*0
Peroxychlorite		-34.4	-34.4	± 2.0	kJ/mol	83.4514 ± 0.0013	852472-63-0*0
Triiodide		-254.3	-257.5	± 3.4	kJ/mol	380.713959 ± 0.000090	14900-04-0*0
1-Chloro ozone		226.3	223.0	± 2.3	kJ/mol	83.4509 ± 0.0013	141801-66-3*101
Benzoic acid		-367.30	-384.72	± 0.17	kJ/mol	122.1213 ± 0.0056	65-85-0*500
2,3-Dimethylbenzaldehyde		-66.3	-94.3	± 2.4	kJ/mol	134.1751 ± 0.0072	5779-93-1*0
(2,3-dimethylphenyl)oxomethyl		82.6	59.9	± 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		158.6	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		-310.56	-327.13	± 0.63	kJ/mol	86.0892 ± 0.0033	431-03-8*0
1,2-Dibromoethane		-11.6	-38.5	± 1.2	kJ/mol	187.8612 ± 0.0026	106-93-4*0
Dioxymethylidyne		299.8	301.1	± 1.7	kJ/mol	44.00950 ± 0.00100	791121-04-5*0
Fluorosyl fluoride		192.8	193.3	± 2.3	kJ/mol	53.99621 ± 0.00030	86825-57-2*1
(Hydroxyimino)methyl		250.1	244.0	± 1.9	kJ/mol	44.03272 ± 0.00087	206442-92-4*1
Trifluoromethide		-637.5	-639.4	± 1.8	kJ/mol	69.00646 ± 0.00080	54128-17-5*0
Diiodide		-178.13	-180.72	± 0.48	kJ/mol	253.809489 ± 0.000060	12190-71-5*0
1-Isocyanoethylidene		545.5	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	461.3	± 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		263.8	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	336.3	± 1.9	kJ/mol	52.0315 ± 0.0024	11127-17-6*0
Vinylacetylene cation		1221.7	1215.2	± 1.1	kJ/mol	52.0740 ± 0.0032	59699-48-8*0
Bicyclo[1.1.0]but-2-ylium-1-yl		1287.0	1278.0	± 1.5	kJ/mol	52.0740 ± 0.0032	78525-41-40
Dibromide		-196.9	-211.0	± 2.2	kJ/mol	159.8085 ± 0.0020	12595-70-9*0
Dioxygen		94.410	94.383	± 0.000	kJ/mol	31.99880 ± 0.00060	7782-44-7*2
3-Methylene-1-cyclopropen-1-yl anion		417.3	413.5	± 1.6	kJ/mol	51.0672 ± 0.0032	117469-28-00
2-Cyclopropen-1-ylidenemethyl		635.7	632.6	± 1.3	kJ/mol	51.0666 ± 0.0032	127611-25-0*0
5-Methyl-1,3-cyclopentadiene		133.8	110.9	± 1.4	kJ/mol	80.1277 ± 0.0048	96-38-8*0
Disilicon		587.5	591.4	± 1.6	kJ/mol	56.17100 ± 0.00060	12597-35-2*0
Fluoronium		1490.1	1491.4	± 1.9	kJ/mol	21.01373 ± 0.00014	12206-67-6*1
Disiloxane		-330.3	-347.4	± 2.3	kJ/mol	78.21804 ± 0.00079	13597-73-4*0
Tetramethylsilane		-184.3	-214.7	± 2.1	kJ/mol	88.2236 ± 0.0033	75-76-3*0
Trimethylsilyl		47.9	25.8	± 2.1	kJ/mol	73.1891 ± 0.0025	16571-41-8*0
Dihydrogen fluoride anion		-257.0	-260.1	± 1.9	kJ/mol	21.01483 ± 0.00014	117339-92-12
Chlorohydrofluorine cation		1000.8	998.1	± 2.1	kJ/mol	55.45849 ± 0.00090	70110-63-3*0
1,2,3,5-Hexatetraene		391.7	380.0	± 1.6	kJ/mol	78.1118 ± 0.0048	60239-33-0*1
1,2,3-Pentatriene		302.5	290.2	± 1.4	kJ/mol	66.1011 ± 0.0040	62018-46-6*0
(Z)-1-Methylallyl	$C/C=C\[CH2]$	154.7	137.3	± 1.0	kJ/mol	55.0984 ± 0.0032	98705-00-1*0
Azanylium		1266.57	1264.49	± 0.11	kJ/mol	16.02207 ± 0.00016	15194-15-7*0
Dioxygenyl ion monohydrate		828.5	821.5	± 2.1	kJ/mol	50.01353 ± 0.00091	11083-61-7*0
Diazenide		175.6	176.7	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*100
2-Cyclopropyn-1-ylidene		898.8	905.7	± 1.6	kJ/mol	36.0321 ± 0.0024	102508-15-6*1
Helium hydride cation		1350.148	1348.258	± 0.000	kJ/mol	5.009993 ± 0.000070	17009-49-3*0
2-Cyclopropyn-1-ylium-1-yl		1944.7	1952.6	± 1.9	kJ/mol	36.0316 ± 0.0024	154702-35-9*0
Fluorochlorate		-256.03	-255.43	± 0.81	kJ/mol	54.45165 ± 0.00090	12272-56-9*0
Sulfuric acid			-895.08	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*898
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
Trioxidanyl		26.36	23.09	± 0.19	kJ/mol	49.00614 ± 0.00090	12500-78-6*2
Methyleneoxonium cation		827.7	818.3	± 1.7	kJ/mol	32.04131 ± 0.00090	177788-17-90
Hydroxymethanide		9.5	2.9	± 1.7	kJ/mol	31.03447 ± 0.00088	55830-71-2*0
Formaldehyde		-105.389	-109.229	± 0.096	kJ/mol	30.02598 ± 0.00087	50-00-0*2
Hydroxymethylene cation		986.4	982.8	± 1.6	kJ/mol	30.02543 ± 0.00087	135395-06-1*2
Hydroxymethylene cation		1482.1	1479.4	± 1.9	kJ/mol	30.02543 ± 0.00087	135395-06-1*3
Hydroxymethylene anion		160.2	157.5	± 1.7	kJ/mol	30.02653 ± 0.00087	207914-87-2*2
Hydroxymethylene anion		334.0	334.8	± 2.1	kJ/mol	30.02653 ± 0.00087	207914-87-2*3
Aquacarbon		467.6	465.5	± 1.9	kJ/mol	30.02598 ± 0.00087	81434-73-3*102
Aquacarbon cation		1196.1	1193.0	± 1.7	kJ/mol	30.02543 ± 0.00087	81434-73-30
Azidonitrene		660.8	657.6	± 1.6	kJ/mol	56.02696 ± 0.00028	147363-92-6*1
Peroxyformic acid		-265.2	-273.0	± 1.5	kJ/mol	62.0248 ± 0.0012	107-32-4*3
Nitrous acid		-72.970	-78.627	± 0.079	kJ/mol	47.01348 ± 0.00061	7782-77-6*0
Deuterium atom cation		1532.210	1534.123	± 0.000	kJ/mol	2.01355319809 ± 0.00000000040	14464-47-2*0
Propyne cation		1192.62	1186.90	± 0.38	kJ/mol	40.0633 ± 0.0024	34526-53-9*0
Cyclopropylidene		544.7	535.9	± 1.5	kJ/mol	40.0639 ± 0.0024	2143-70-6*2
Chlorine difluoride		22.5	23.9	± 1.9	kJ/mol	73.44951 ± 0.00090	91483-78-2*0
Propynylidene cation		1410.9	1413.5	± 1.3	kJ/mol	38.0474 ± 0.0024	75123-91-0*0
Propynylidene		597.4	599.2	± 1.1	kJ/mol	38.0480 ± 0.0024	67152-18-5*4
Propadienylidenide		381.17	382.07	± 0.41	kJ/mol	38.0485 ± 0.0024	109292-49-1*0
1,2-Propadien-1-ylium-1-yl		1561.7	1562.9	± 1.4	kJ/mol	38.0474 ± 0.0024	110714-00-6*0
Dioxaziridinyl cation		1365.8	1363.3	± 1.7	kJ/mol	46.00499 ± 0.00060	66252-29-70
Aminooxy cation		945.99	938.86	± 0.77	kJ/mol	32.02147 ± 0.00034	51375-41-80
Ethane cation		1043.14	1029.13	± 0.59	kJ/mol	30.0685 ± 0.0017	34488-65-8*0
n-Pentane		-155.81	-172.78	± 0.30	kJ/mol	72.1488 ± 0.0041	109-66-0*500
iso-Pentane			-178.17	± 0.39	kJ/mol	72.1488 ± 0.0041	78-78-4*500
neo-Pentane			-189.49	± 0.38	kJ/mol	72.1488 ± 0.0041	463-82-1*500
Cyclopentane			-104.93	± 0.41	kJ/mol	70.1329 ± 0.0041	287-92-3*590
2-Methylpentane		-134.43	-173.69	± 0.73	kJ/mol	86.1754 ± 0.0049	107-83-5*0
3-Methylpentane		-131.89	-171.39	± 0.76	kJ/mol	86.1754 ± 0.0049	96-14-0*0
2,3-Dimethylbutane		-136.47	-177.57	± 0.81	kJ/mol	86.1754 ± 0.0049	79-29-8*0
Cyclohexane		-131.77	-155.90	± 0.29	kJ/mol	84.1595 ± 0.0049	110-82-7*500
Nitric acid		-178.99	-173.27	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*500
1,5-Hexadiene		108.54	83.95	± 0.39	kJ/mol	82.1436 ± 0.0049	592-42-7*0
2-Hydroxyethyl		-6.0	-18.4	± 1.5	kJ/mol	45.0605 ± 0.0017	4422-54-2*3
Bifluoride		-705.22	-709.07	± 0.35	kJ/mol	39.005295 ± 0.000070	18130-74-0*0
Ethoxy		1.26	-12.16	± 0.43	kJ/mol	45.0605 ± 0.0017	2154-50-9*0
Trifluoride ion		-348.9	-349.7	± 2.6	kJ/mol	56.9957582 ± 0.0000015	25730-99-8*0
Ethylene anion		232.1	224.5	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*1
Dioxaziridinyl anion		295.9	293.4	± 1.6	kJ/mol	46.00609 ± 0.00060	66252-31-1*0
Peroxyimidogen cation		1409.7	1406.8	± 1.9	kJ/mol	46.00499 ± 0.00060	60488-32-60
Dicarbon monoxide cation		1433.9	1439.0	± 2.1	kJ/mol	40.0203 ± 0.0016	12287-08-0*0
C=O-C cation		1816.9	1820.9	± 2.0	kJ/mol	40.0203 ± 0.0016	83483-98-1*2
Peroxyimidogen anion		165.0	162.7	± 1.7	kJ/mol	46.00609 ± 0.00060	60488-31-5*0
Oxirene anion		288.3	285.3	± 2.2	kJ/mol	42.0372 ± 0.0016	157-18-60
Trioxidaniumyl		935.2	926.1	± 1.5	kJ/mol	50.01353 ± 0.00091	161321-37-5*3
Oxoethylidene		261.1	258.3	± 1.1	kJ/mol	42.0367 ± 0.0016	39920-84-8*1
Formic acid anion		-241.2	-246.9	± 1.9	kJ/mol	46.0259 ± 0.0010	19066-82-1*2
Dioxirane cation		1050.8	1043.2	± 2.0	kJ/mol	46.0248 ± 0.0010	232262-10-1*0
Dioxymethyl cation		1075.0	1068.6	± 1.8	kJ/mol	46.0248 ± 0.0010	232262-11-2*0
Nirous oxide cation		1329.70	1326.80	± 0.12	kJ/mol	44.01233 ± 0.00033	12269-46-4*0
Chlorite		-105.51	-107.69	± 0.37	kJ/mol	67.4520 ± 0.0011	14998-27-7*0
Dioxymethylene		341.8	339.8	± 3.0	kJ/mol	45.0174 ± 0.0010	438586-67-5*2
OH-CO vdW complex		-80.23	-76.51	± 0.88	kJ/mol	45.0174 ± 0.0010	2564-85-4100
CO-HO vdW complex		-77.4	-73.2	± 1.3	kJ/mol	45.0174 ± 0.0010	2564-84-3100
Cyanato cation		1261.50	1262.00	± 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
Fluoroniumyl ion		1275.555	1275.787	± 0.022	kJ/mol	20.005795 ± 0.000070	12381-92-9*0
Acetylene anion		356.9	356.7	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*1
Hydrofluorate ion		-75.6	-75.1	± 1.8	kJ/mol	20.006892 ± 0.000070	37249-79-9*0
Oxadiazirine anion		95.1	95.5	± 2.9	kJ/mol	44.01343 ± 0.00033	350586-31-1*0
Ammonium hydroxide			-362.826	± 0.062	kJ/mol	35.04584 ± 0.00047	1336-21-6*800
Glyoxal		-189.35	-194.80	± 0.71	kJ/mol	58.0361 ± 0.0017	107-22-2*2
Ethynediol		-18.3	-22.1	± 1.7	kJ/mol	58.0361 ± 0.0017	16005-17-7*0
Chlorine difluoride anion		-504.9	-505.8	± 1.9	kJ/mol	73.45005 ± 0.00090	16892-05-0*0
Dihydrogen fluoride anion		-61.9	-60.5	± 3.2	kJ/mol	21.01483 ± 0.00014	117339-92-1*2
Dimethylaminylium		1040.7	1025.2	± 1.8	kJ/mol	44.0752 ± 0.0017	49784-85-2*0
Trioxodinitrate anion		-104.2	-107.5	± 1.9	kJ/mol	76.01223 ± 0.00091	194856-62-7*100
Ethylimidogen		306.1	291.5	± 2.1	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
Dichloromethylene		313.99	315.20	± 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		203.54	204.35	± 0.94	kJ/mol	48.4719 ± 0.0012	75466-08-9*0
Hydrogen peroxide cation		931.04	924.18	± 0.98	kJ/mol	34.01413 ± 0.00062	12325-10-9*2
Chlorohydroxymethyl		-46.2	-51.8	± 2.0	kJ/mol	65.4787 ± 0.0012	147139-06-8*2
Hydrogen fluoride			-321.85	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*818
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
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		95.93	96.47	± 0.61	kJ/mol	32.01759 ± 0.00080	71267-42-0*0
Polytetrafluoroethylene			-830.20	± 0.55	kJ/mol	100.0150 ± 0.0016	9002-84-0*591
Nitrosyl fluoride		-85.47	-87.84	± 0.79	kJ/mol	49.00454 ± 0.00031	7789-25-5*0
trans-1,2-Difluoroethene		-299.60	-306.03	± 0.89	kJ/mol	64.0341 ± 0.0016	1630-78-0*0
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		-405.1	-403.7	± 1.6	kJ/mol	47.00905 ± 0.00085	62227-71-8*0
Fluoroisoformyl cation		1347.4	1349.5	± 1.9	kJ/mol	47.00795 ± 0.00085	1871-25-60
Chlorine oxide peroxide		226.5	227.4	± 2.5	kJ/mol	83.4509 ± 0.0013	141801-67-4*100
Nitrogen hydride oxide		71.2	60.0	± 1.5	kJ/mol	33.02996 ± 0.00037	38544-48-8*0
o-Benzyne cation		1392.8	1384.8	± 1.7	kJ/mol	76.0954 ± 0.0048	70220-84-7*0
m-Benzyne cation		1364.8	1356.3	± 1.8	kJ/mol	76.0954 ± 0.0048	121058-08-0*0
p-Benzyne		603.6	594.2	± 1.2	kJ/mol	76.0960 ± 0.0048	3355-34-8*1
Hydroxyaminylium		1048.5	1041.3	± 2.6	kJ/mol	32.02147 ± 0.00034	66097-71-0*2
Iodine		198.109	197.709	± 0.0021	kJ/mol	126.904470 ± 0.000030	14362-44-8*2
1,3-Cycloheptadiene		123.58	94.47	± 0.78	kJ/mol	94.1543 ± 0.0056	4054-38-0*1
Tropylium		898.9	879.2	± 1.1	kJ/mol	91.1299 ± 0.0056	26811-28-9*0
Fluorodioxidenium		1221.9	1219.5	± 2.0	kJ/mol	50.99665 ± 0.00060	139584-95-5*0
Hydroxyamidogen anion		90.6	84.8	± 2.8	kJ/mol	32.02257 ± 0.00034	66097-71-00
1-Chloro ozone anion		-109.0	-111.5	± 2.2	kJ/mol	83.4514 ± 0.0013	224299-15-4*3
Iminomethide		252.7	248.9	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*2
Dihydrogen fluoride		-55.9	-54.9	± 1.6	kJ/mol	21.01428 ± 0.00014	12592-22-2*1
cis-1,2-Dibromoethene	$C(\Br)=C\Br$	121.2	100.6	± 2.0	kJ/mol	185.8453 ± 0.0026	590-11-4*0
1,1-Dibromoethane		-5.3	-32.3	± 1.8	kJ/mol	187.8612 ± 0.0026	557-91-5*0
Nitrosyl nitrate		70.7	62.4	± 1.7	kJ/mol	92.0111 ± 0.0012	15969-55-80
1-Chloro ozone anion		-66.9	-68.8	± 2.1	kJ/mol	83.4514 ± 0.0013	224299-15-4*1
Hydrogen cyanide cation		1442.53	1442.06	± 0.20	kJ/mol	27.02483 ± 0.00081	12601-62-6*0
Carbamoyl		74.1	67.7	± 2.7	kJ/mol	44.03272 ± 0.00087	2858-51-71
Formaldiminoxy		160.9	153.9	± 1.5	kJ/mol	44.03272 ± 0.00087	2683-96-7*0
Fluorodioxidanide		-256.8	-256.1	± 1.9	kJ/mol	50.99775 ± 0.00060	23553-17-5*0
Formaldoxime		50.6	39.8	± 1.8	kJ/mol	45.04066 ± 0.00088	75-17-2*2
Oxaziridine		115.5	103.7	± 2.1	kJ/mol	45.04066 ± 0.00088	6827-26-5*0
Fluorosyl fluoride anion		-147.1	-146.8	± 3.0	kJ/mol	53.99675 ± 0.00030	86825-57-22
Cyanoethynyl		715.7	722.1	± 1.2	kJ/mol	50.0388 ± 0.0024	62435-43-2*0
(E)-Diazene anion		265.5	258.7	± 2.0	kJ/mol	30.02991 ± 0.00020	59952-06-60
Ammonium hydroxide		-360.45	-361.53	± 0.57	kJ/mol	35.04584 ± 0.00047	1336-21-6*500
(Z)-Diazene cation	$[H]/N=[N+]\[H]$	1157.0	1150.2	± 1.3	kJ/mol	30.02881 ± 0.00020	86631-37-0*0
2-Methylene-2H-azirine		404.2	396.9	± 1.7	kJ/mol	53.0627 ± 0.0024	110027-86-6*0
Nitrilomethylium		1783.13	1786.61	± 0.48	kJ/mol	26.01689 ± 0.00080	12539-57-0*0
Hydrogen fluoride			-321.86	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*902
2-Cyanovinylium		1517.4	1515.3	± 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
Dioxofluorine		524.0	523.2	± 1.0	kJ/mol	50.99720 ± 0.00060	175861-93-5*0
2-Isocyanovinyl		544.6	542.6	± 1.7	kJ/mol	52.0547 ± 0.0024	225798-14-1*2
Cyanomethylene		529.5	530.5	± 1.3	kJ/mol	39.0361 ± 0.0016	2612-62-6*2
Isocyanomethylene		586.3	587.3	± 1.7	kJ/mol	39.0361 ± 0.0016	78694-65-2*2
Perchloryloxy		248.4	240.8	± 1.8	kJ/mol	99.4503 ± 0.0015	12133-63-0*0
3-Methylcycloprop-3-en-2-ylium-1-yl		1283.9	1277.4	± 1.5	kJ/mol	52.0740 ± 0.0032	185841-59-20
Vinylvinylidene cation		1429.8	1424.2	± 2.0	kJ/mol	52.0740 ± 0.0032	161054-20-2*1
1,2-Butadien-1-ylidene		511.8	506.3	± 2.1	kJ/mol	52.0746 ± 0.0032	119908-55-3*2
1-Buten-3-ynylium		1482.3	1479.8	± 1.5	kJ/mol	51.0661 ± 0.0032	84654-85-3*1
1-Hydrazinylium-1-yl		1143.4	1136.4	± 1.4	kJ/mol	30.02881 ± 0.00020	63986-30-1*0
Dihydrooxooxygen cation		994.8	988.1	± 1.6	kJ/mol	34.01413 ± 0.00062	177329-59-8*0
3-Buten-1-ynylium		1572.6	1570.2	± 1.7	kJ/mol	51.0661 ± 0.0032	103928-84-3*1
3-Methylene-1-cyclopropen-1-ylium		1398.7	1395.4	± 1.7	kJ/mol	51.0661 ± 0.0032	117469-28-0*2
Tetraoxidanyl		2.1	0.4	± 2.9	kJ/mol	65.0055 ± 0.0012	69696-93-1*100
Butyraldehyde		-185.31	-205.67	± 0.85	kJ/mol	72.1057 ± 0.0033	123-72-8*0
Perchlorate		-263.9	-272.8	± 2.1	kJ/mol	99.4508 ± 0.0015	14797-73-0*0
Chloroallene		181.8	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		-68.59	-106.12	± 0.37	kJ/mol	84.1595 ± 0.0049	96-37-7*0
Dioxosilane		-906.75	-911.73	± 0.64	kJ/mol	60.08430 ± 0.00067	7631-86-9*500
Dioxosilane		-826.30	-902.23	± 0.65	kJ/mol	60.08430 ± 0.00067	7631-86-9*520
Ethynylene cation		1964.94	1971.53	± 0.40	kJ/mol	24.0209 ± 0.0016	12595-79-8*0
Silicon carbide cation		1602.0	1606.7	± 2.6	kJ/mol	40.09565 ± 0.00085	78393-58-5*0
Silyliumyl		1155.50	1153.88	± 0.96	kJ/mol	30.10083 ± 0.00033	28149-31-7*0
Disilanyl anion		63.5	51.1	± 2.2	kJ/mol	61.21125 ± 0.00069	53199-49-8*0
Disilene		393.3	384.8	± 2.3	kJ/mol	60.20276 ± 0.00066	15435-77-5*1
Di-mu-hydrodihydrodisilicon		385.5	375.1	± 2.7	kJ/mol	60.20276 ± 0.00066	129970-82-7*22
Bromine dioxide		165.6	156.0	± 2.1	kJ/mol	111.9028 ± 0.0012	21255-83-4*0
(3E)-1,3-Hexadien-5-yne		358.8	346.5	± 1.9	kJ/mol	78.1118 ± 0.0048	5222-77-5*0
Divinylacetylene		361.8	350.4	± 2.0	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
Pentatetraene		452.7	448.7	± 1.6	kJ/mol	64.0853 ± 0.0040	21986-03-8*0
Ethylammoniumyl		827.5	807.5	± 1.6	kJ/mol	45.0832 ± 0.0017	41857-50-5*0
Diazenide		347.4	344.6	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*1
2-Methyl-2-propanamine		-86.98	-120.63	± 0.55	kJ/mol	73.1369 ± 0.0033	75-64-9*0
Trioxidanylium		1085.2	1078.9	± 1.4	kJ/mol	49.00559 ± 0.00090	74241-49-9*2
Aminyliumyl		1659.04	1659.96	± 0.24	kJ/mol	15.014131 ± 0.000099	19067-62-0*0
Biphenyl		207.1	178.9	± 1.1	kJ/mol	154.2078 ± 0.0096	92-52-4*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		1324.88	1323.07	± 0.89	kJ/mol	21.18709 ± 0.00060	12200-65-6*0
Kryptonium		1106.33	1104.55	± 0.69	kJ/mol	84.8074 ± 0.1000	37276-90-7*0
Hydroxylamine		-15.4	-25.9	± 1.4	kJ/mol	33.02996 ± 0.00037	7803-49-8*2
Monosulfur cation		1276.48	1278.27	± 0.14	kJ/mol	32.0655 ± 0.0060	14701-12-3*0
Oxosulfur		999.33	999.93	± 0.13	kJ/mol	48.0649 ± 0.0060	767269-11-4*0
Hydrosulfide		-80.51	-80.51	± 0.19	kJ/mol	33.0745 ± 0.0060	15035-72-0*0
Hydroxylamine cation		857.7	847.9	± 1.6	kJ/mol	33.02941 ± 0.00037	62675-55-2*0
Sulfuric acid			-887.10	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*825
Sulfuric acid			-899.14	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*846
Hydrogen sulfate		-942.4	-952.8	± 1.9	kJ/mol	97.0721 ± 0.0061	14996-02-2*0
Fluorine atom cation		1758.300	1760.599	± 0.017	kJ/mol	18.99785462 ± 0.00000050	14701-13-4*0
Hydrogen sulfite		-684.0	-691.3	± 1.9	kJ/mol	81.0727 ± 0.0061	15181-46-1*0
Platinum		563.4	564.3	± 1.7	kJ/mol	195.0780 ± 0.0020	7440-06-4*0
Hydroperoxyimidogen		103.4	99.8	± 2.4	kJ/mol	47.01348 ± 0.00061	877456-58-1*1
Cyclopropenyliumdiyl		1692.1	1695.1	± 1.9	kJ/mol	37.0395 ± 0.0024	127476-05-5*0
Cyclopropynyl anion		518.12	521.10	± 0.88	kJ/mol	37.0406 ± 0.0024	136861-42-2*0
Nitric acid cation		1029.16	1020.10	± 0.69	kJ/mol	63.01233 ± 0.00091	272109-63-4*0
Chlorine difluoride cation		1346.3	1344.9	± 2.1	kJ/mol	73.44896 ± 0.00090	86825-59-4*0
2-Butynylium		1258.7	1251.4	± 1.6	kJ/mol	53.0820 ± 0.0032	64235-83-2*1
Trifluorine cation		1529.5	1527.4	± 2.3	kJ/mol	56.9946610 ± 0.0000015	64710-22-1*0
1-Methylene-2-propenylium		1059.4	1049.3	± 1.7	kJ/mol	53.0820 ± 0.0032	62698-26-4*2
1-Methylene-2-propenylium		1256.3	1246.6	± 1.7	kJ/mol	53.0820 ± 0.0032	62698-26-4*1
Hydroxyimidogen anion		229.8	227.4	± 2.2	kJ/mol	31.01463 ± 0.00032	35337-59-80
1,3-Butadienylium		1133.6	1123.6	± 2.5	kJ/mol	53.0820 ± 0.0032	86181-69-3*2
Chlorine difluoride anion		-319.0	-319.0	± 2.2	kJ/mol	73.45005 ± 0.00090	91419-41-9*0
3-Methanetetrayl-1,2-cyclopropanediylidene		1154.8	1164.2	± 1.9	kJ/mol	48.0428 ± 0.0032	78015-08-4*0
Cyclopentene			7.06	± 0.51	kJ/mol	68.1170 ± 0.0040	142-29-0*590
Formaldehyde anion		-26.7	-28.3	± 2.0	kJ/mol	30.02653 ± 0.00087	27837-46-3*0
Cyclohexene		27.21	-4.26	± 0.32	kJ/mol	82.1436 ± 0.0049	110-83-8*0
Cyclohexene		-21.94	-37.81	± 0.30	kJ/mol	82.1436 ± 0.0049	110-83-8*500
Formaldehyde		196.002	192.699	± 0.096	kJ/mol	30.02598 ± 0.00087	50-00-0*1
Ethanium		888.7	870.3	± 1.8	kJ/mol	31.0764 ± 0.0017	24669-33-8*2
Ethanium		895.1	877.3	± 1.9	kJ/mol	31.0764 ± 0.0017	24669-33-8*3
1-Hydroxyethanide		-20.3	-33.7	± 2.2	kJ/mol	45.0610 ± 0.0017	88032-18-2*0
Hydrogen difluoride cation		1174.3	1171.3	± 1.5	kJ/mol	39.004198 ± 0.000070	126950-54-72
(Methylmethylene)oxonium		685.8	671.6	± 2.2	kJ/mol	45.0600 ± 0.0017	23653-97-6*0
Methoxymethyl anion		23.3	10.3	± 2.3	kJ/mol	45.0610 ± 0.0017	61192-30-1*0
Hydrogen fluoride			-321.83	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*901
Acetaldehyde anion		-62.2	-72.5	± 2.2	kJ/mol	44.0531 ± 0.0017	60427-04-5*0
Nitric acid			-186.83	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*801
Triazirine		464.1	457.6	± 2.6	kJ/mol	43.02816 ± 0.00022	157-29-9*0
Nitric acid			-197.77	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*805
Ethylene anion		231.6	225.5	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*2
Cyanogen bromide anion		57.7	54.1	± 3.8	kJ/mol	105.9220 ± 0.0013	54092-05-6*0
Dioxygen		0.000	0.000	± 0.000	kJ/mol	31.99880 ± 0.00060	7782-44-7*1
Ketene cation		882.21	879.04	± 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
1-Ethylium-1-yl		1182.0	1174.7	± 3.2	kJ/mol	28.0526 ± 0.0016	85944-79-2*0
Oxoethenylium		1139.7	1142.4	± 2.1	kJ/mol	41.0282 ± 0.0016	92056-63-8*0
Ethylidene anion		325.7	318.4	± 1.8	kJ/mol	28.0537 ± 0.0016	35829-99-3*0
Oxiranylidene		456.2	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		236.4	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
Methoxyoxoniumylidene		1012.62	1003.78	± 0.68	kJ/mol	47.0328 ± 0.0010	86475-50-5*0
Aminooxy anion		47.3	40.4	± 1.7	kJ/mol	32.02257 ± 0.00034	51375-41-8*0
Formic acid		-431.51	-424.67	± 0.20	kJ/mol	46.0254 ± 0.0010	64-18-6*500
Dioxirane anion		-173.0	-179.8	± 3.4	kJ/mol	46.0259 ± 0.0010	157-26-60
Dioxymethyl anion		55.0	49.8	± 1.5	kJ/mol	46.0259 ± 0.0010	93207-29-5*0
2-Cyclopropyn-1-ylidenemethyl anion		800.9	809.8	± 1.7	kJ/mol	48.0433 ± 0.0032	289679-90-9*0
H-CO2 vdW complex		-178.3	-177.5	± 2.1	kJ/mol	45.0174 ± 0.0010	2564-83-2100
Ozone cation		1352.880	1350.541	± 0.041	kJ/mol	47.99765 ± 0.00090	12596-82-6*0
Hydrogen bromide			-120.39	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*834
Nirous oxide anion		99.3	96.7	± 1.9	kJ/mol	44.01343 ± 0.00033	12274-12-3*0
2-Propanol		-305.39	-318.20	± 0.27	kJ/mol	60.0950 ± 0.0025	67-63-0*500
1-Propanol		-290.38	-302.56	± 0.23	kJ/mol	60.0950 ± 0.0025	71-23-8*500
Chlorosyl chloride anion		-185.4	-184.7	± 2.3	kJ/mol	86.9053 ± 0.0018	86825-55-00
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
Acetic acid		-484.02	-483.59	± 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			-484.81	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*840
Chloryl chloride		126.1	122.1	± 1.7	kJ/mol	102.9042 ± 0.0019	117489-73-3*0
Chloroniumyl ion		1137.798	1137.732	± 0.0051	kJ/mol	36.46009 ± 0.00090	12258-94-5*0
Acetylene anion		380.1	380.4	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*2
Ethyl formate			-426.0	± 1.1	kJ/mol	74.0785 ± 0.0025	109-94-4*500
Hypofluorous acid anion		155.3	154.7	± 2.6	kJ/mol	36.00629 ± 0.00031	36505-07-4*2
Propionic acid		-415.5	-433.1	± 1.3	kJ/mol	74.0785 ± 0.0025	79-09-4*2
(1Z)-Ethanimine		58.8	44.2	± 1.4	kJ/mol	43.0678 ± 0.0016	56003-82-8*0
(E)-2-Iminoethylium		1108.3	1097.6	± 3.0	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
Cyanogen cation		1598.24	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
Isocyanomethyliumylidene		1615.7	1621.3	± 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
Methylammoniumyl		865.89	851.96	± 0.26	kJ/mol	31.05659 ± 0.00088	34516-31-9*0
Cyanomethyliumylidene		1719.8	1725.3	± 2.1	kJ/mol	38.0276 ± 0.0016	76619-90-4*0
Cyanomethylidyne anion		410.1	413.7	± 2.2	kJ/mol	38.0287 ± 0.0016	12373-35-2*0
2,3-didehydro-1H-azirin-1-yl		720.3	724.4	± 2.1	kJ/mol	38.0281 ± 0.0016	439586-06-8*0
Hydrogen bromide			-120.53	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*954
Cyanoaminylium		1362.8	1359.7	± 2.4	kJ/mol	41.03157 ± 0.00082	205443-18-1*0
Cyanoamidogen anion		69.91	66.90	± 0.94	kJ/mol	41.03267 ± 0.00082	67131-47-9*0
Cyanamide		140.8	134.5	± 1.5	kJ/mol	42.04006 ± 0.00082	420-04-2*0
Diazomethylene		579.3	580.0	± 3.8	kJ/mol	40.02418 ± 0.00081	2468-81-7*0
Methylamine anion		84.2	69.3	± 2.8	kJ/mol	31.05769 ± 0.00088	81096-79-9*0
Trichloromethylium		856.13	854.61	± 0.93	kJ/mol	118.3683 ± 0.0028	27130-34-3*0
Dichloromethyliumyl		1122.0	1122.9	± 1.8	kJ/mol	82.9156 ± 0.0020	55945-51-2*0
Ammonium bromide		-253.64	-270.22	± 0.15	kJ/mol	97.9425 ± 0.0010	12124-97-9*510
Hydrogen chloride			-166.562	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*839
Aminomethyl anion		209.5	199.2	± 2.1	kJ/mol	30.04975 ± 0.00085	74215-21-7*0
Dioxodiazoxane		109.4	105.3	± 1.8	kJ/mol	76.01168 ± 0.00091	122413-35-8*2
Methylaminilium		1135.2	1125.3	± 2.1	kJ/mol	30.04865 ± 0.00085	49784-84-1*0
1,1,1-Trichloroethane		-183.85	-177.20	± 0.52	kJ/mol	133.4033 ± 0.0031	71-55-6*500
Methyliumylamino		1056.1	1049.3	± 1.7	kJ/mol	29.04071 ± 0.00083	65130-65-6*0
Azanidylmethyl		224.4	217.2	± 2.2	kJ/mol	29.04181 ± 0.00083	127593-73-1*0
Fluorosyl fluoride anion		-56.6	-55.7	± 2.4	kJ/mol	53.99675 ± 0.00030	86825-57-21
Vinyl chloride		-3.61	0.96	± 0.91	kJ/mol	62.4979 ± 0.0018	75-01-4*500
Chloromethane cation		1014.55	1007.78	± 0.16	kJ/mol	50.4867 ± 0.0012	12538-71-5*0
Hydrogen bromide			-120.69	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*844
Aminomethyliumyl		1039.5	1031.9	± 2.3	kJ/mol	29.04071 ± 0.00083	89302-94-3*0
Hydrogen chloride			-166.603	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*954
Bromofluoromethane		-197.4	-211.9	± 4.9	kJ/mol	112.9290 ± 0.0013	373-52-4*0
Aminomethylene anion		353.0	346.1	± 2.3	kJ/mol	29.04181 ± 0.00083	207914-86-1*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		1350.757	1350.756	± 0.000	kJ/mol	83.7995 ± 0.1000	16915-28-9*0
Hydrogen fluoride			-321.94	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*821
Hydrogen chloride			-166.634	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*840
Hydrogen carbonate			-689.858	± 0.040	kJ/mol	61.0174 ± 0.0012	71-52-3*800
1,2-Difluoroacetylene cation		1081.7	1084.5	± 1.3	kJ/mol	62.0177 ± 0.0016	268566-70-7*0
Difluorophosgene cation		653.43	650.67	± 0.51	kJ/mol	66.00636 ± 0.00085	73256-56-1*0
Methylimidogen anion		321.1	313.5	± 1.4	kJ/mol	29.04181 ± 0.00083	82539-34-2*0
Hydrogen chloride			-165.944	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*907
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			-144.37	± 0.95	kJ/mol	187.8181 ± 0.0022	593-95-3*590
2-Chloroethanol			-314.91	± 0.53	kJ/mol	80.5132 ± 0.0019	107-07-3*590
2-Bromoethanol			-274.72	± 0.46	kJ/mol	124.9645 ± 0.0019	540-51-2*590
Methyleneaminylium		1456.7	1453.1	± 2.1	kJ/mol	28.03277 ± 0.00082	53518-13-1*1
Phenylium		1149.15	1136.37	± 0.85	kJ/mol	77.1034 ± 0.0048	17333-73-2*2
Hydrogen chloride			-165.544	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*953
Trioxidanylium		1070.4	1064.2	± 1.4	kJ/mol	49.00559 ± 0.00090	74241-49-9*0
iso-Proplylide		128.8	110.4	± 1.5	kJ/mol	43.0882 ± 0.0024	25012-80-0*0
m-Benzyne anion		444.2	435.3	± 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
Deuterium hydride cation		1490.498	1490.587	± 0.000	kJ/mol	3.021493 ± 0.000070	12181-16-7*0
Cycloheptane		-126.63	-156.52	± 0.51	kJ/mol	98.1861 ± 0.0057	291-64-5*500
Tribromine		156.0	134.3	± 3.2	kJ/mol	239.7120 ± 0.0030	11094-39-6*0
Hypochlorous acid cation		998.94	995.90	± 0.90	kJ/mol	52.45949 ± 0.00095	71606-47-8*0
Ethylbenzene			-12.35	± 0.54	kJ/mol	106.1650 ± 0.0064	100-41-4*500
Triiodine cation		946.1	941.0	± 4.1	kJ/mol	380.712861 ± 0.000090	12596-32-6*0
Phenylacetylene			273.97	± 0.73	kJ/mol	102.1332 ± 0.0064	536-74-3*500
Phenyloxoniumylidene		901.5	887.2	± 2.2	kJ/mol	93.1028 ± 0.0048	41071-17-4*0
Anisole		-47.70	-72.54	± 0.79	kJ/mol	108.1378 ± 0.0056	100-66-3*0
Carbon tetracation		14993.620	14998.767	± 0.053	kJ/mol	12.00851 ± 0.00080	16092-62-9*0
Peroxychloric acid		76.6	68.4	± 2.5	kJ/mol	100.4582 ± 0.0015	177778-91-5*0
Fluorobenzene		-152.13	-149.72	± 0.88	kJ/mol	96.1023 ± 0.0048	462-06-6*500
Nitrate			-206.56	± 0.18	kJ/mol	62.00549 ± 0.00090	14797-55-8*800
Carbon		711.404	716.889	± 0.044	kJ/mol	12.01070 ± 0.00080	7440-44-0*1
Bromobenzene			60.3	± 1.3	kJ/mol	157.0079 ± 0.0049	108-86-1*500
Tribromide		-287.5	-308.5	± 1.9	kJ/mol	239.7125 ± 0.0030	14522-80-6*0
Carbon		833.335	838.482	± 0.044	kJ/mol	12.01070 ± 0.00080	7440-44-0*2
Pyridinium		761.7	740.8	± 1.3	kJ/mol	80.1073 ± 0.0040	16969-45-2*0
Acetone		-244.60	-247.71	± 0.27	kJ/mol	58.0791 ± 0.0025	67-64-1*500
2-Hydroxy-2-propenyl		4.0	-9.5	± 1.2	kJ/mol	57.0712 ± 0.0024	742072-56-6*0
Hydrogen chloride			-165.554	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*825
Nitrosyl nitrate		48.3	40.4	± 1.8	kJ/mol	92.0111 ± 0.0012	15969-55-8*1
Propionaldehyde		-218.02	-216.57	± 0.28	kJ/mol	58.0791 ± 0.0025	123-38-6*500
Ethyl nitrite		-81.29	-98.69	± 0.87	kJ/mol	75.0666 ± 0.0017	109-95-5*0
trans-1,2-Dibromoethene	$C(\Br)=C/Br$	121.4	101.6	± 2.0	kJ/mol	185.8453 ± 0.0026	590-12-5*0
1,1-Dibromoethene		125.3	105.0	± 2.1	kJ/mol	185.8453 ± 0.0026	593-92-0*0
Norbornadiene		267.68	242.24	± 0.98	kJ/mol	92.1384 ± 0.0056	121-46-0*0
Aminomethyliumylidene		1168.3	1165.1	± 2.2	kJ/mol	28.03277 ± 0.00082	86784-42-1*0
Monoammonium succinate			-1067.82	± 0.72	kJ/mol	135.1186 ± 0.0035	38457-08-8*510
Diammonium succinate			-1182.32	± 0.48	kJ/mol	152.1492 ± 0.0035	2226-88-2*510
Acrolein		-46.4	-56.8	± 1.4	kJ/mol	56.0633 ± 0.0024	107-02-8*2
2-Chloro ozone anion		-103.6	-105.9	± 3.2	kJ/mol	83.4514 ± 0.0013	141801-67-40
Diazenium		968.65	957.38	± 0.73	kJ/mol	31.03675 ± 0.00025	37369-93-0*0
Ethenedione cation		909.5	912.7	± 2.0	kJ/mol	56.0197 ± 0.0017	12541-99-0*0
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
Water			-285.797	± 0.025	kJ/mol	18.01528 ± 0.00033	7732-18-5*589
2-(Methylidyneamino)ethenyl		637.1	632.3	± 2.0	kJ/mol	53.0627 ± 0.0024	123416-74-0*22
Cyclopropylide		264.8	252.0	± 1.7	kJ/mol	41.0723 ± 0.0024	1724-45-4*0
1-Cyanovinylium		1318.3	1317.1	± 2.2	kJ/mol	52.0542 ± 0.0024	85399-09-3*0
Hydrogen fluoride			-321.98	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*823
Hydroxyoxoammoniumyl		984.1	977.7	± 1.7	kJ/mol	47.01293 ± 0.00061	80371-48-8*0
Hypochlorous acid anion		198.7	198.4	± 2.5	kJ/mol	52.46059 ± 0.00095	34524-94-2*0
Tetraoxygen		145.8	142.2	± 3.8	kJ/mol	63.9976 ± 0.0012	12596-83-7*22
Butatriene cation		1210.5	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
1-Propenylidene		630.3	622.8	± 1.7	kJ/mol	40.0639 ± 0.0024	70277-78-0*2
Vinylvinylidene anion		405.7	399.0	± 2.0	kJ/mol	52.0751 ± 0.0032	167386-49-4*1
Tetrahedrane cation		1326.7	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
Fluoronium		774.04	771.10	± 0.91	kJ/mol	21.01373 ± 0.00014	12206-67-6*0
Tetroxidane		-34.0	-44.5	± 1.8	kJ/mol	66.0135 ± 0.0012	29683-94-1*0
1-Buten-3-yn-1-yl		547.7	545.0	± 1.2	kJ/mol	51.0666 ± 0.0032	2810-61-9*2
Triazirinylium ion		1608.8	1605.9	± 1.6	kJ/mol	42.01967 ± 0.00021	92220-05-8*0
3-Buten-1-ynylium		1603.8	1602.8	± 1.7	kJ/mol	51.0661 ± 0.0032	103928-84-3*2
3-Methylene-1-cyclopropen-1-ylium		1467.6	1464.0	± 1.6	kJ/mol	51.0661 ± 0.0032	117469-28-0*1
2-Cyclopropen-1-ylidenemethylium		1346.4	1343.8	± 1.8	kJ/mol	51.0661 ± 0.0032	112936-36-4*2
Dinitrogen pentoxide			-41.12	± 0.38	kJ/mol	108.0105 ± 0.0015	10102-03-1*500
1,3-Cyclobutadien-1-ylium		1388.2	1383.3	± 1.9	kJ/mol	51.0661 ± 0.0032	81913-77-1*2
Cyanic azide		502.6	498.2	± 1.9	kJ/mol	68.03766 ± 0.00085	764-05-6*0
Phenyl hydroperoxide		13.4	-5.7	± 2.1	kJ/mol	110.1106 ± 0.0049	36112-26-2*0
Tetranitrogen cation		1392.8	1392.5	± 1.5	kJ/mol	56.02641 ± 0.00028	12185-04-5*0
Methylcyclopentane		-116.54	-137.90	± 0.36	kJ/mol	84.1595 ± 0.0049	96-37-7*500
Hydrooxonitrate		78.62	75.70	± 0.99	kJ/mol	31.01463 ± 0.00032	66057-02-1*0
Dioxosilane		-904.05	-908.91	± 0.69	kJ/mol	60.08430 ± 0.00067	7631-86-9*510
Chlorosyl chloride cation		1132.6	1130.8	± 2.0	kJ/mol	86.9043 ± 0.0018	86825-56-10
Methanol anion		-89.1	-99.8	± 2.8	kJ/mol	32.04241 ± 0.00090	68474-04-4*0
Silylene anion		167.1	165.5	± 1.4	kJ/mol	30.10193 ± 0.00033	54991-62-7*0
Silyliumylidene		1134.7	1135.9	± 1.1	kJ/mol	29.09289 ± 0.00031	31241-66-4*0
Disilene cation		1069.5	1060.4	± 2.0	kJ/mol	60.20221 ± 0.00066	108492-63-3*0
Di-mu-hydrodihydrodisilicon cation		1180.1	1172.5	± 3.3	kJ/mol	60.20221 ± 0.00066	129970-82-71
Di-mu-hydrodihydrodisilicon anion		288.3	279.8	± 3.4	kJ/mol	60.20331 ± 0.00066	129970-83-81
mu-Hydrotrihydrodisilicon		459.2	451.0	± 2.5	kJ/mol	60.20276 ± 0.00066	497967-55-2*1
Hydrogen fluoride			-321.33	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*809
Isocyanomethylium		1272.8	1270.6	± 2.2	kJ/mol	40.0435 ± 0.0016	78269-43-9*0
Bromine atom		117.910	111.847	± 0.056	kJ/mol	79.90400 ± 0.00100	10097-32-2*1
Ammonium chloride		-311.553	-314.714	± 0.062	kJ/mol	53.49120 ± 0.00095	12125-02-9*510
Dewar benzene		422.1	405.1	± 1.7	kJ/mol	78.1118 ± 0.0048	5649-95-6*0
2-Propenylidyne anion		464.6	460.9	± 1.7	kJ/mol	39.0565 ± 0.0024	120126-89-8*0
1,2-Propadien-1-yl-3-ylidene anion		621.9	629.3	± 1.3	kJ/mol	36.0326 ± 0.0024	109292-47-9*0
1,2-Hexadien-4-yne		407.4	397.4	± 1.7	kJ/mol	78.1118 ± 0.0048	34783-10-3*0
3-Methylene-1-penten-4-yne		362.5	349.9	± 2.2	kJ/mol	78.1118 ± 0.0048	6929-96-0*1
2-Propen-3-yliumylidene		1494.5	1491.5	± 1.7	kJ/mol	39.0554 ± 0.0024	84654-86-4*0
Ammonium radical		190.01	179.42	± 0.43	kJ/mol	18.03850 ± 0.00029	92075-50-8*0
2-Propenylidene anion		536.0	532.6	± 1.7	kJ/mol	39.0565 ± 0.0024	98705-30-7*0
3-Methyl-1,4-pentadiyne		439.0	427.6	± 1.6	kJ/mol	78.1118 ± 0.0048	57242-04-3*0
Ethylaminylium		1092.2	1076.3	± 2.4	kJ/mol	44.0752 ± 0.0017	54387-08-5*11
2-Methyl-2-propanamine		-133.08	-150.56	± 0.54	kJ/mol	73.1369 ± 0.0033	75-64-9*500
1,2-Diphenylethane		84.88	51.14	± 0.76	kJ/mol	182.2610 ± 0.0112	103-29-7*500
Hypofluorous acid cation		1142.02	1139.01	± 0.87	kJ/mol	36.00519 ± 0.00031	90243-22-4*0
Anthracene		255.96	226.94	± 0.98	kJ/mol	178.2292 ± 0.0112	120-12-7*0
Anthracene		150.59	124.78	± 0.92	kJ/mol	178.2292 ± 0.0112	120-12-7*500
Phenanthrene		136.24	110.97	± 0.66	kJ/mol	178.2292 ± 0.0112	85-01-8*500
Diphenylacetylene		432.4	407.4	± 1.2	kJ/mol	178.2292 ± 0.0112	501-65-5*0
Diphenylacetylene		334.73	312.78	± 0.94	kJ/mol	178.2292 ± 0.0112	501-65-5*500
Imidogen anion		322.62	322.67	± 0.16	kJ/mol	15.015229 ± 0.000099	23841-33-0*0
Bicyclo[1.1.0]buta-1,1-diene-2,4-diyl		990.3	993.6	± 2.0	kJ/mol	49.0507 ± 0.0032	99417-53-50
Benzoic acid		-274.30	-294.10	± 0.19	kJ/mol	122.1213 ± 0.0056	65-85-0*0
Dihelium		1733.310	1729.576	± 0.018	kJ/mol	8.0052040 ± 0.0000040	12184-98-4*1
Argonium		1151.9	1150.2	± 1.5	kJ/mol	40.9554 ± 0.0010	12254-68-1*0
Monosulfur anion		76.49	78.54	± 0.14	kJ/mol	32.0665 ± 0.0060	14337-03-2*0
2-Cyclopropyn-1-ylidene		993.2	1000.0	± 2.5	kJ/mol	36.0321 ± 0.0024	102508-15-6*2
Fluorosyl fluoride cation		1413.1	1413.4	± 3.5	kJ/mol	53.99566 ± 0.00030	86825-50-51
Dibromine			-2.25	± 0.18	kJ/mol	159.8080 ± 0.0020	7726-95-6*800
Thiodioxy		206.8	204.6	± 2.1	kJ/mol	64.0648 ± 0.0060	164034-62-2*0
2-Cyclopropyn-1-yl anion		664.7	672.0	± 1.6	kJ/mol	36.0326 ± 0.0024	500574-36-7*0
Sulfur oxide peroxide		-25.9	-30.2	± 2.3	kJ/mol	80.0642 ± 0.0061	175799-68-5*2
Propynylidene		543.50	546.49	± 0.65	kJ/mol	38.0480 ± 0.0024	67152-18-5*0
Sulfuric acid			-886.59	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*822
Sulfuric acid			-900.56	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*850
1-Cyclopropene-1,2-diyl		791.1	790.6	± 1.5	kJ/mol	38.0480 ± 0.0024	202744-75-0*0
Hydrogen atom		-22.3	-24.0	± 1.5	kJ/mol	1.007940 ± 0.000070	12385-13-6*1000001
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
Trioxirane		272.7	270.1	± 1.3	kJ/mol	47.99820 ± 0.00090	153851-84-4*0
Trihydrogen		756.931	754.146	± 0.015	kJ/mol	3.02382 ± 0.00021	12184-91-7*2
Formyloxidanyl		-125.84	-127.20	± 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
Ammonium hydroxide			-365.99	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*815
1,2-Butadienylium		1315.5	1307.4	± 1.7	kJ/mol	53.0820 ± 0.0032	65114-67-21
Ethoxyethane		-266.19	-278.51	± 0.60	kJ/mol	74.1216 ± 0.0033	60-29-7*500
Peroxyhypochlorous acid cation		1030.4	1024.6	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-21
1,3-Butadienylium		1255.9	1246.5	± 2.3	kJ/mol	53.0820 ± 0.0032	86181-69-3*1
Ammonium hydroxide			-365.12	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*805
Ammonium hydroxide			-366.30	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*844
Hydroxyoxoammoniumyl		984.1	977.7	± 1.7	kJ/mol	47.01293 ± 0.00061	80371-48-8*1
Ammonium hydroxide			-363.81	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*801
Glycolaldehyde		-292.3	-304.9	± 1.7	kJ/mol	60.0520 ± 0.0017	141-46-8*21
Glycolaldehyde		-290.6	-303.0	± 1.7	kJ/mol	60.0520 ± 0.0017	141-46-8*31
Glycolaldehyde		-283.9	-296.8	± 1.7	kJ/mol	60.0520 ± 0.0017	141-46-8*22
Oxadiazirine cation		1509.9	1507.2	± 2.4	kJ/mol	44.01233 ± 0.00033	227934-45-40
Methyl acetate			-445.61	± 0.57	kJ/mol	74.0785 ± 0.0025	79-20-9*500
Ammonium hydroxide			-366.24	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*850
1-Hydroxy-2-propanone		-340.7	-360.4	± 1.7	kJ/mol	74.0785 ± 0.0025	116-09-6*21
1-Hydroxy-2-propanone		-338.1	-356.3	± 1.7	kJ/mol	74.0785 ± 0.0025	116-09-6*31
1-Hydroxy-2-propanone		-329.8	-349.7	± 1.7	kJ/mol	74.0785 ± 0.0025	116-09-6*22
Ammonium hydroxide			-366.01	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*855
Methoxyoxomethyl		-151.6	-160.7	± 1.5	kJ/mol	59.0440 ± 0.0017	16481-04-2*2
Hydrogen peroxide		-193.098	-187.281	± 0.079	kJ/mol	34.01468 ± 0.00062	7722-84-1*500
Oxygen difluoride cation		1292.12	1289.59	± 0.66	kJ/mol	53.99566 ± 0.00030	39432-25-2*0
1-Ethenylium-1-yl		1507.1	1507.1	± 2.1	kJ/mol	26.0367 ± 0.0016	80541-07-7*0
Ammonium hydroxide			-365.85	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*861
Propionic acid		-505.35	-509.50	± 0.18	kJ/mol	74.0785 ± 0.0025	79-09-4*500
NON cation		1444.0	1444.2	± 2.8	kJ/mol	44.01233 ± 0.00033	227934-46-50
Ethylene glycol		-448.63	-455.15	± 0.37	kJ/mol	62.0678 ± 0.0018	107-21-1*500
Hydrochlorate ion		-25.2	-24.2	± 2.5	kJ/mol	36.46119 ± 0.00090	63099-75-2*0
Hydrogen difluoride cation		1267.5	1265.4	± 4.1	kJ/mol	39.004198 ± 0.000070	126950-54-71
NON anion		495.3	492.8	± 2.5	kJ/mol	44.01343 ± 0.00033	227934-47-60
Oxalic acid		-819.54	-829.63	± 0.42	kJ/mol	90.0349 ± 0.0020	144-62-7*500
Dimethylamine			-43.31	± 0.37	kJ/mol	45.0837 ± 0.0017	124-40-3*500
Trioxidanyl		25.36	23.27	± 0.13	kJ/mol	49.00614 ± 0.00090	12500-78-6*0
Oxygen difluoride anion		-202.0	-201.9	± 2.7	kJ/mol	53.99675 ± 0.00030	7783-41-70
Difluorodioxidanium		1283.7	1279.1	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-01
(E)-2-Iminoethylium		1148.6	1138.9	± 3.3	kJ/mol	42.0594 ± 0.0016	91127-33-2*12
1-Iminoethylium		833.6	823.1	± 3.0	kJ/mol	42.0594 ± 0.0016	128365-64-02
1-Iminoethanide		185.6	175.2	± 3.2	kJ/mol	42.0604 ± 0.0016	128365-65-12
1-Iminoethylium		1342.1	1333.2	± 3.9	kJ/mol	42.0594 ± 0.0016	128365-64-012
N-Methylenemethaniminium		904.3	893.3	± 3.1	kJ/mol	42.0594 ± 0.0016	88333-01-1*2
Nitrous acid anion		-105.82	-110.44	± 0.78	kJ/mol	47.01403 ± 0.00061	256393-36-9*2
(Methylimino)methanide		222.9	212.1	± 3.2	kJ/mol	42.0604 ± 0.0016	64709-60-01
Aziridine			92.10	± 0.88	kJ/mol	43.0678 ± 0.0016	151-56-4*500
2-Aziridinylium		1010.6	998.6	± 3.3	kJ/mol	42.0594 ± 0.0016	91127-35-42
2-Aziridinide		315.9	303.8	± 3.5	kJ/mol	42.0604 ± 0.0016	111127-93-6*2
2-Aziridinyl		364.3	352.1	± 2.1	kJ/mol	42.0599 ± 0.0016	23838-09-72
2-Aziridinylium		1304.6	1292.9	± 4.2	kJ/mol	42.0594 ± 0.0016	91127-35-412
Trimethylamine			-48.73	± 0.86	kJ/mol	59.1103 ± 0.0025	75-50-3*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			48.95	± 0.69	kJ/mol	68.1170 ± 0.0040	78-79-5*500
Cyanoaminyliumyl		1672.2	1673.6	± 2.6	kJ/mol	40.02363 ± 0.00081	316122-03-9*0
Cyanoamidogen anion		211.73	211.66	± 0.62	kJ/mol	40.02473 ± 0.00081	189879-95-6*0
Cyanamide			58.92	± 0.54	kJ/mol	42.04006 ± 0.00082	420-04-2*500
Diazomethyliumyl		1641.2	1642.4	± 4.1	kJ/mol	40.02363 ± 0.00081	307495-90-5*0
Diazomethylene anion		408.3	408.5	± 3.8	kJ/mol	40.02473 ± 0.00081	205498-92-6*0
3H-Diazirin-3-ylidene		579.1	579.4	± 2.7	kJ/mol	40.02418 ± 0.00081	253308-70-2*0
Methylamine			-45.27	± 0.44	kJ/mol	31.05714 ± 0.00088	74-89-5*500
Dihydrogen		1.417	0.019	± 0.000	kJ/mol	2.01588 ± 0.00014	1333-74-0*1
Chlorine chlorite		177.4	175.1	± 2.2	kJ/mol	102.9042 ± 0.0019	105206-44-8*2
Chloromethyliumylidene		1282.8	1285.9	± 2.4	kJ/mol	47.4629 ± 0.0012	69773-94-0*0
Chloromethylidyne anion		319.9	323.6	± 2.5	kJ/mol	47.4639 ± 0.0012	117129-77-8*0
Ammonium hydroxide			-366.36	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*828
Nitrosyl nitrite anion		-103.0	-106.2	± 2.8	kJ/mol	76.01223 ± 0.00091	122413-35-81
n-Heptane		-201.43	-223.88	± 0.46	kJ/mol	100.2019 ± 0.0057	142-82-5*500
Trioxidane		-81.95	-90.55	± 0.62	kJ/mol	50.01408 ± 0.00091	14699-99-1*0
Peroxyhypochlorite		-252.78	-251.75	± 0.34	kJ/mol	67.4520 ± 0.0011	224299-14-3*0
n-Octane		-226.23	-249.35	± 0.54	kJ/mol	114.2285 ± 0.0065	111-65-9*500
Nitric acid trihydrate		-1062.00	-1055.15	± 0.20	kJ/mol	117.0587 ± 0.0019	13444-83-2*500
Nitric acid monohydrate		-479.12	-472.63	± 0.19	kJ/mol	81.0282 ± 0.0012	13444-82-1*500
n-Nonane		-247.52	-274.38	± 0.49	kJ/mol	128.2551 ± 0.0073	111-84-2*500
Methanol dimer		-398.5	-419.2	± 1.4	kJ/mol	64.0837 ± 0.0018	42845-44-3*0
Hydroxylamine			-97.1	± 2.2	kJ/mol	33.02996 ± 0.00037	7803-49-8*1000
Chlorodioxidanyl		100.36	99.27	± 0.34	kJ/mol	67.4515 ± 0.0011	17376-09-9*0
n-Decane		-272.66	-300.21	± 0.80	kJ/mol	142.2817 ± 0.0081	124-18-5*500
Poly(vinylchloride)		-84.5	-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
Peroxynitrous acid		-5.76	-11.59	± 0.36	kJ/mol	63.01288 ± 0.00091	14691-52-2*0
1,5-Hexadiene			54.59	± 0.31	kJ/mol	82.1436 ± 0.0049	592-42-7*500
Hydrazoic acid cation		1333.63	1327.95	± 0.83	kJ/mol	43.02761 ± 0.00022	58852-14-5*0
Dichloromethane			-122.78	± 0.36	kJ/mol	84.9320 ± 0.0020	75-09-2*590
Hydrazoic acid anion		309.0	302.7	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*1
Dioxodiazoxane		125.7	120.4	± 2.1	kJ/mol	76.01168 ± 0.00091	122413-35-8*3
Ammonium hydroxide			-364.66	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*803
Ammonium hydroxide			-366.19	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*818
Dihydrogen cation		1489.060	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*1
Tribromofluoromethane		-99.2	-123.1	± 1.5	kJ/mol	270.7211 ± 0.0031	353-54-8*0
Tribromochloromethane		85.4	62.6	± 1.5	kJ/mol	287.1754 ± 0.0032	594-15-0*0
Difluoromethylene anion		-211.15	-209.97	± 0.58	kJ/mol	50.00805 ± 0.00080	66212-40-6*0
Peroxychlorous acid		102.7	96.9	± 2.5	kJ/mol	84.4588 ± 0.0013	177778-92-6*2
Fluoromethylidyne anion		200.8	204.3	± 1.9	kJ/mol	31.00965 ± 0.00080	33412-12-3*0
Carbonate		-223.4	-226.6	± 2.5	kJ/mol	60.0100 ± 0.0012	3812-32-6*0
Azide			272.57	± 0.48	kJ/mol	42.02077 ± 0.00021	14343-69-2*800
Carbon dioxide			-413.195	± 0.019	kJ/mol	44.00950 ± 0.00100	124-38-9*1000
Ammonium hydroxide			-366.38	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*833
Paraformaldehyde			-179.2	± 1.6	kJ/mol	30.02598 ± 0.00087	30525-89-4*500
Difluorovinylidene		129.4	130.6	± 2.2	kJ/mol	62.0182 ± 0.0016	41895-33-4*0
Fluoroethynylium		1536.3	1541.0	± 2.3	kJ/mol	43.0193 ± 0.0016	268566-69-4*0
Bromoacetylene		281.7	275.2	± 1.6	kJ/mol	104.9333 ± 0.0019	593-61-3*0
Chlorine hydride oxide		163.9	154.0	± 2.4	kJ/mol	84.4588 ± 0.0013	1027055-52-2*0
Perchloryl cation		1252.1	1246.4	± 2.5	kJ/mol	83.4504 ± 0.0013	23594-88-9*0
Propane cation		974.7	954.6	± 1.7	kJ/mol	44.0951 ± 0.0025	34479-70-4*0
Peroxyhypochlorous acid anion		-32.1	-33.9	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-32
Chloro(chlorooxy)methylene		98.	101.	± 15.	kJ/mol	98.9155 ± 0.0020	479587-31-0*11
Trifluorine		80.6	81.9	± 2.6	kJ/mol	56.9952096 ± 0.0000015	73455-86-4*0
Chlorooxomethylium		783.7	783.8	± 2.2	kJ/mol	63.4623 ± 0.0012	38264-03-8*0
2-Iodoethanol			-207.2	± 2.4	kJ/mol	171.9650 ± 0.0017	624-76-0*590
1,3-Butadiyne cation		1440.21	1442.08	± 0.63	kJ/mol	50.0581 ± 0.0032	55468-55-8*0
Carbon suboxide cation		928.7	932.2	± 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		209.2	197.3	± 1.2	kJ/mol	78.1124 ± 0.0048	34562-85-1*0
Oxygen atom hexacation		42035.28	42037.14	± 0.12	kJ/mol	15.99611 ± 0.00030	14158-22-6*0
o-Benzyne		625.7	616.4	± 1.1	kJ/mol	76.0960 ± 0.0048	462-80-6*1
Hydraziniumyl		886.6	873.3	± 2.0	kJ/mol	32.04469 ± 0.00031	20771-51-1*0
m-Benzyne		527.0	518.6	± 1.2	kJ/mol	76.0960 ± 0.0048	1828-89-3*0
p-Benzyne cation		1425.0	1417.7	± 2.1	kJ/mol	76.0954 ± 0.0048	121058-09-1*0
Cyclobutane			3.92	± 0.39	kJ/mol	56.1063 ± 0.0032	287-23-0*590
p-Benzyne		587.1	577.6	± 1.2	kJ/mol	76.0960 ± 0.0048	3355-34-8*0
Toluene		19.80	12.05	± 0.31	kJ/mol	92.1384 ± 0.0056	108-88-3*500
Tetraoxidanyl		53.1	46.1	± 5.1	kJ/mol	65.0055 ± 0.0012	69696-93-1*2
Hydrazine		57.31	50.75	± 0.18	kJ/mol	32.04524 ± 0.00031	302-01-2*500
Cyclopentadienylium		1088.33	1075.46	± 0.92	kJ/mol	65.0927 ± 0.0040	29661-18-5*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
Cycloheptene		-25.2	-46.3	± 1.7	kJ/mol	96.1702 ± 0.0057	628-92-2*500
Triiodine		153.4	149.4	± 3.6	kJ/mol	380.713410 ± 0.000090	12596-31-5*0
Cycloheptatriene		154.11	145.33	± 0.96	kJ/mol	92.1384 ± 0.0056	544-25-2*500
Phenylethene			104.46	± 0.48	kJ/mol	104.1491 ± 0.0064	100-42-5*500
Benzonitrile		161.22	163.59	± 0.91	kJ/mol	103.1213 ± 0.0056	100-47-0*500
Isocyanobenzene		321.1	307.2	± 1.7	kJ/mol	103.1213 ± 0.0056	931-54-4*0
Phenol		-146.42	-162.27	± 0.65	kJ/mol	94.1112 ± 0.0048	108-95-2*500
1-Methyl-1-ethylium-1-yl		1058.2	1045.7	± 1.9	kJ/mol	42.0792 ± 0.0024	121408-19-3*0
Anisole			-119.46	± 0.77	kJ/mol	108.1378 ± 0.0056	100-66-3*500
Benzaldehyde		-86.13	-87.20	± 0.95	kJ/mol	106.1219 ± 0.0056	100-52-7*500
Tetraoxodinitrogen cation		1030.7	1025.2	± 2.6	kJ/mol	92.0105 ± 0.0012	64476-91-1*0
Carbon dication		4150.474	4155.620	± 0.044	kJ/mol	12.00960 ± 0.00080	16092-61-8*0
Isopropylidene anion		282.5	268.4	± 2.0	kJ/mol	42.0803 ± 0.0024	121408-19-30
Hydrogen chloride			-166.712	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*951
Acetophenone			-140.1	± 1.1	kJ/mol	120.1485 ± 0.0064	98-86-2*500
1-Phenylethenol		-9.5	-33.3	± 2.1	kJ/mol	120.1485 ± 0.0064	4383-15-7*0
p-Tolualdehyde			-126.4	± 1.3	kJ/mol	120.1485 ± 0.0064	104-87-0*500
Iodine monochloride		-36.511	-35.537	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*510
o-Tolualdehyde			-119.4	± 1.1	kJ/mol	120.1485 ± 0.0064	529-20-4*500
Fluorobenzene anion		-18.7	-30.5	± 1.8	kJ/mol	96.1029 ± 0.0048	34561-55-2*0
m-Chlorophenylium		1161.3	1151.2	± 2.6	kJ/mol	111.5481 ± 0.0049	127983-85-1*0
p-Chlorophenylium		1148.6	1139.1	± 2.5	kJ/mol	111.5481 ± 0.0049	42766-43-8*0
o-Chlorophenylium		1167.9	1158.6	± 2.5	kJ/mol	111.5481 ± 0.0049	137963-70-3*0
Methoxymethylene		144.7	134.3	± 1.4	kJ/mol	44.0526 ± 0.0017	19527-10-7*22
Iodobenzene cation		1023.46	1008.02	± 0.99	kJ/mol	204.0078 ± 0.0048	38406-85-8*0
Methylcyclopropane			1.96	± 0.59	kJ/mol	56.1063 ± 0.0032	594-11-6*590
1,3-Propanediyl		320.1	308.2	± 1.6	kJ/mol	42.0797 ± 0.0024	32458-33-6*1
Nitrobenzene			7.1	± 1.4	kJ/mol	123.1094 ± 0.0049	98-95-3*500
Dihydrogen fluoride		-56.5	-54.2	± 1.7	kJ/mol	21.01428 ± 0.00014	12592-22-2*2
Carbon dioxide anion		-340.6	-340.1	± 2.2	kJ/mol	44.01005 ± 0.00100	14485-07-5*0
Pyridine		102.25	100.22	± 0.39	kJ/mol	79.0999 ± 0.0040	110-86-1*500
Dioxiranylidene cation		1409.1	1410.3	± 2.6	kJ/mol	44.00895 ± 0.00100	138832-57-20
Nitromethane		-114.09	-112.91	± 0.43	kJ/mol	61.0401 ± 0.0010	75-52-5*500
Hydrogen fluoride			-321.96	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*822
Dioxygen difluoride		75.1	71.6	± 3.6	kJ/mol	69.99561 ± 0.00060	183051-89-0*0
2-Hydroxyethenyl		143.8	137.3	± 1.0	kJ/mol	43.0446 ± 0.0016	108665-16-3*11
2-Hydroxyethenyl		147.2	140.9	± 1.2	kJ/mol	43.0446 ± 0.0016	108665-16-3*22
2,2,4-Trimethylpentane		-224.2	-258.6	± 1.5	kJ/mol	114.2285 ± 0.0065	540-84-1*500
Bromoniumyl		1097.79	1089.94	± 0.13	kJ/mol	80.9114 ± 0.0010	12258-64-9*0
cis-1,2-Diiodoethene	$C(\I)=C\I$	217.45	209.17	± 0.35	kJ/mol	279.8462 ± 0.0016	590-26-1*0
trans-1,2-Diiodoethene	$C(\I)=C/I$	215.11	207.72	± 0.35	kJ/mol	279.8462 ± 0.0016	590-27-2*0
2-Hydroxyethenyl		150.5	144.5	± 1.6	kJ/mol	43.0446 ± 0.0016	108665-16-3*12
Norbornadiene			208.9	± 1.2	kJ/mol	92.1384 ± 0.0056	121-46-0*500
2,3-Butanedione			-365.53	± 0.53	kJ/mol	86.0892 ± 0.0033	431-03-8*500
Succinic acid		-801.6	-823.7	± 2.7	kJ/mol	118.0880 ± 0.0034	110-15-6*0
Tetrazete		764.9	759.0	± 1.8	kJ/mol	56.02696 ± 0.00028	42851-09-2*0
1,2-Diiodoethane		87.86	73.19	± 0.90	kJ/mol	281.8621 ± 0.0016	624-73-7*0
1,2-Diiodoethane			9.32	± 0.60	kJ/mol	281.8621 ± 0.0016	624-73-7*500
2-Butanone		-267.75	-273.24	± 0.79	kJ/mol	72.1057 ± 0.0033	78-93-3*500
Dioxiranylidene anion		-110.2	-109.7	± 3.0	kJ/mol	44.01005 ± 0.00100	138832-58-30
Isocyanogen iodide		341.7	342.0	± 4.9	kJ/mol	152.92191 ± 0.00080	66004-32-8*0
Acrolein			-95.7	± 1.4	kJ/mol	56.0633 ± 0.0024	107-02-8*500
Ethenedione anion		-149.7	-147.1	± 1.7	kJ/mol	56.0207 ± 0.0017	77783-15-4*0
Urea		-317.72	-333.32	± 0.12	kJ/mol	60.05534 ± 0.00091	57-13-6*500
Formamide			-251.02	± 0.28	kJ/mol	45.04066 ± 0.00088	75-12-7*500
Acetamide			-315.86	± 0.53	kJ/mol	59.0672 ± 0.0017	60-35-5*500
Dioxymethylidyne cation		1436.6	1439.1	± 2.7	kJ/mol	44.00895 ± 0.00100	791121-04-52
1-Propenylium		1231.9	1221.6	± 1.7	kJ/mol	41.0713 ± 0.0024	50457-58-4*2
1-Propenylide		204.0	192.7	± 1.8	kJ/mol	41.0723 ± 0.0024	65887-20-9*2
Dioxymethylidyne cation		1388.2	1391.7	± 3.2	kJ/mol	44.00895 ± 0.00100	791121-04-5101
Acrylonitrile		446.4	441.0	± 1.7	kJ/mol	53.0627 ± 0.0024	107-13-1*2
Acrylonitrile		146.32	153.99	± 0.77	kJ/mol	53.0627 ± 0.0024	107-13-1*500
Isocyanoethene		544.1	539.2	± 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
Carbon dioxide cation		1335.0	1335.5	± 2.4	kJ/mol	44.00895 ± 0.00100	12181-61-2*1
Cyclopropylium		1104.9	1093.4	± 2.4	kJ/mol	41.0713 ± 0.0024	1724-43-2*0
Carbon monoxide anion		30.0	33.7	± 2.3	kJ/mol	28.01065 ± 0.00085	12539-63-8*0
Tetraazatetrahedrane		763.7	757.2	± 1.7	kJ/mol	56.02696 ± 0.00028	12596-63-3*0
Acetonitrile			40.62	± 0.22	kJ/mol	41.0520 ± 0.0016	75-05-8*500
Isocyanogen iodide anion		123.0	125.2	± 9.3	kJ/mol	152.92246 ± 0.00080	66004-32-80
(Z)-Diazene anion	$[H]/N=[N-]\[H]$	280.0	273.3	± 2.0	kJ/mol	30.02991 ± 0.00020	86631-37-00
Bicyclo[1.1.0]buta-1,3-dien-2-yl anion		803.2	810.8	± 1.8	kJ/mol	48.0433 ± 0.0032	289679-89-6*0
Tetraoxygen		104.4	102.4	± 3.5	kJ/mol	63.9976 ± 0.0012	12596-83-7*11
Vinylacetylene			266.3	± 2.1	kJ/mol	52.0746 ± 0.0032	689-97-4*500
Hydrogen fluoride			-321.87	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*903
Vinylvinylidene		690.5	684.4	± 2.7	kJ/mol	52.0746 ± 0.0032	148759-16-4*11
Hydrogen difluoride cation		1241.	1238.	± 16.	kJ/mol	39.004198 ± 0.000070	126950-54-7*1
1-Buten-3-ynylium		1483.1	1480.5	± 1.7	kJ/mol	51.0661 ± 0.0032	84654-85-3*2
Carbon monoxide		465.578	469.285	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*1
Bicyclo[1.1.0]buta-1,3-dien-4-ylium-2-yl		2087.7	2097.5	± 2.3	kJ/mol	48.0423 ± 0.0032	289679-91-0*0
2-Cyclopropyn-1-ylidenemethyliumyl		2239.8	2247.7	± 2.3	kJ/mol	48.0423 ± 0.0032	289679-92-1*0
Isodiazene anion		380.9	374.1	± 2.1	kJ/mol	30.02991 ± 0.00020	63986-30-10
2-Cyclopropen-1-ylidenemethylium		1433.1	1429.3	± 1.9	kJ/mol	51.0661 ± 0.0032	112936-36-4*1
Isocyanogen bromide		341.0	335.3	± 3.5	kJ/mol	105.9214 ± 0.0013	65997-98-0*0
1,3-Cyclobutadien-1-ylium		1473.0	1468.4	± 1.9	kJ/mol	51.0661 ± 0.0032	81913-77-1*1
1,3-Cyclobutadien-1-yl anion		616.3	611.8	± 2.1	kJ/mol	51.0672 ± 0.0032	154675-37-3*0
Cyclobutenylium		1038.6	1025.5	± 2.8	kJ/mol	53.0820 ± 0.0032	12316-90-4*0
Hydrogen iodide			-56.831	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*800
Butyraldehyde		-235.83	-239.36	± 0.84	kJ/mol	72.1057 ± 0.0033	123-72-8*500
Ammonium hydroxide			-366.32	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*822
Dioxohydrazine		172.93	171.17	± 0.14	kJ/mol	60.01228 ± 0.00062	16824-89-8*2
Disilicon cation		1349.9	1353.5	± 2.7	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
1-Propynylium		1547.1	1545.1	± 3.1	kJ/mol	39.0554 ± 0.0024	24858-94-4*0
Chloryl ion		1100.26	1097.60	± 0.53	kJ/mol	67.4510 ± 0.0011	25052-55-5*0
Oxobromonium		1139.9	1132.1	± 1.6	kJ/mol	95.9029 ± 0.0010	142315-39-7*0
Oxosilicate		-106.1	-104.9	± 2.6	kJ/mol	44.08545 ± 0.00042	12503-59-2*0
Cycloprop-1-enylium		1502.3	1498.0	± 2.1	kJ/mol	39.0554 ± 0.0024	117067-78-4*0
Silicon carbide		-72.1	-73.1	± 1.5	kJ/mol	40.09620 ± 0.00085	409-21-2*502
Silane cation		1104.7	1097.6	± 1.6	kJ/mol	32.11671 ± 0.00041	34826-51-2*0
Silylium		989.75	984.17	± 0.94	kJ/mol	31.10877 ± 0.00037	41753-67-7*0
Silylidyne anion		248.5	249.7	± 1.1	kJ/mol	29.09399 ± 0.00031	68865-96-3*0
Disilanylium		981.8	970.4	± 2.6	kJ/mol	61.21015 ± 0.00069	86860-82-4*0
Cycloprop-2-enylide		514.9	511.9	± 2.2	kJ/mol	39.0565 ± 0.0024	20829-57-6*0
Dioxohydrazine		172.93	171.17	± 0.14	kJ/mol	60.01228 ± 0.00062	16824-89-8*0
1-Disilanylium-1-yl		1124.1	1116.5	± 2.3	kJ/mol	60.20221 ± 0.00066	108492-64-4*0
Di-mu-hydrodihydrodisilicon cation		1194.2	1184.6	± 3.5	kJ/mol	60.20221 ± 0.00066	129970-82-72
Di-mu-hydrodihydrodisilicon anion		296.5	289.0	± 3.5	kJ/mol	60.20331 ± 0.00066	129970-83-82
Ethynylene		827.228	833.933	± 0.092	kJ/mol	24.0214 ± 0.0016	12070-15-4*1
Ammonium hydroxide			-365.42	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*807
2-Propen-3-ylium-1-ylidyne		1791.1	1792.7	± 2.6	kJ/mol	38.0474 ± 0.0024	161054-36-0*0
1,2-Propadien-1-ylium-1-yl-3-ylidene		1981.4	1989.3	± 2.2	kJ/mol	36.0316 ± 0.0024	118090-85-0*1
1,3-Butadiynyl anion		677.3	686.4	± 1.1	kJ/mol	48.0433 ± 0.0032	59158-53-1*0
2,4-Hexadiyne		319.05	312.69	± 0.99	kJ/mol	78.1118 ± 0.0048	2809-69-0*500
Ethynylaminylium		1278.0	1277.6	± 2.6	kJ/mol	40.0435 ± 0.0016	103835-08-1*1
Ammonia anion		94.3	87.3	± 2.4	kJ/mol	17.03111 ± 0.00022	37353-00-7*0
Trimethylenecyclopropane		454.2	441.4	± 1.8	kJ/mol	78.1118 ± 0.0048	3227-90-5*0
3,4-Bis(methylene)cyclobutene		355.5	340.9	± 1.8	kJ/mol	78.1118 ± 0.0048	5291-90-7*0
2-Oxo-1-ethylium-1-yl		1289.4	1286.0	± 2.5	kJ/mol	42.0361 ± 0.0016	214464-96-7*11
1-Ethynylcyclobutene		402.2	387.9	± 1.8	kJ/mol	78.1118 ± 0.0048	813466-25-0*0
3-Methyl-1,2-pentadien-4-yne		414.6	403.4	± 2.3	kJ/mol	78.1118 ± 0.0048	813466-14-7*0
Oxoethylidene anion		86.9	83.6	± 2.1	kJ/mol	42.0372 ± 0.0016	106543-38-8*1
1,3-Pentadiyne			385.0	± 5.0	kJ/mol	64.0853 ± 0.0040	4911-55-1*500
Hydronium radical		-18.5	-21.5	± 2.1	kJ/mol	19.02322 ± 0.00037	12168-76-2*100
1-Aminoethylium		683.2	664.6	± 2.3	kJ/mol	44.0752 ± 0.0017	30208-36-70
1-Propanamine		-93.77	-101.38	± 0.40	kJ/mol	59.1103 ± 0.0025	107-10-8*500
2-Propanamine		-101.55	-112.16	± 0.52	kJ/mol	59.1103 ± 0.0025	75-31-0*500
Hydrogen fluoride			-321.97	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*905
Naphthalene		94.62	75.03	± 0.59	kJ/mol	128.1705 ± 0.0080	91-20-3*500
Propenediylidene anion		588.8	590.0	± 2.3	kJ/mol	38.0485 ± 0.0024	161054-36-00
Hydroxymethyleneoxonium		792.92	782.78	± 0.65	kJ/mol	47.0328 ± 0.0010	77144-12-8*0
Biphenyl		121.7	97.3	± 1.1	kJ/mol	154.2078 ± 0.0096	92-52-4*500
Biphenyl		121.7	97.3	± 1.1	kJ/mol	154.2078 ± 0.0096	92-52-4*520
Ethyl hydroperoxide			-210.	± 20.	kJ/mol	62.0678 ± 0.0018	3031-74-1*500
Aniline		37.29	31.04	± 0.64	kJ/mol	93.1265 ± 0.0048	62-53-3*500
Cyclopropenylidene anion		544.3	543.9	± 2.2	kJ/mol	38.0485 ± 0.0024	16165-40-50
Isocyanic fluoride		301.1	302.9	± 1.8	kJ/mol	45.01584 ± 0.00080	16992-26-0*0
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
Deuterium hydride		0.328	0.319	± 0.000	kJ/mol	3.022042 ± 0.000070	13983-20-5*0
Xenonium		1038.13	1036.35	± 0.89	kJ/mol	132.2974 ± 0.0200	37276-91-8*0
Pyruvic acid			-588.51	± 0.74	kJ/mol	88.0621 ± 0.0026	127-17-3*500
Sulfur dioxide			-322.82	± 0.14	kJ/mol	64.0648 ± 0.0060	7446-09-5*1000
Sulfur trioxide			-440.84	± 0.30	kJ/mol	80.0642 ± 0.0061	7446-11-9*590
Sulfanylium		1148.48	1148.49	± 0.20	kJ/mol	33.0734 ± 0.0060	12273-42-6*0
Bromosyl bromide		180.3	164.5	± 2.1	kJ/mol	175.8074 ± 0.0020	68322-97-4*0
Formic acid			-425.48	± 0.45	kJ/mol	46.0254 ± 0.0010	64-18-6*800
Sulfuric acid			-887.02	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*824
Nitrogen atom dianion		1062.8	1065.0	± 2.8	kJ/mol	14.007837 ± 0.000070	16727-21-2*0
Sulfur hydroxide oxide cation		659.1	648.3	± 3.5	kJ/mol	97.0710 ± 0.0061	12337-07-42
Sulfurous acid		-511.14	-520.64	± 0.89	kJ/mol	82.0801 ± 0.0061	7782-99-2*0
Sulfurous acid			-608.62	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*1000
Sulfur dioxide - hydroxyl complex		-265.8	-267.9	± 2.2	kJ/mol	81.0721 ± 0.0061	32750-86-0100
Platinum dimer		823.5	822.5	± 3.8	kJ/mol	390.1560 ± 0.0040	12596-95-1*0
Platinum hydride		457.1	456.2	± 9.2	kJ/mol	196.0859 ± 0.0020	13966-55-7*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
Isocyanogen chloride		314.7	316.4	± 2.4	kJ/mol	61.4701 ± 0.0012	75754-69-7*0
Ammonia			-78.86	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*805
Hydrogen iodide			-56.648	± 0.089	kJ/mol	127.912410 ± 0.000076	10034-85-2*958
Difluorodioxidanium		1287.2	1283.0	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-02
Fluorine atom pentacation		30617.6	30619.4	± 1.8	kJ/mol	18.99566030 ± 0.00000050	14701-05-4*0
Cyclopentadiene			110.08	± 0.59	kJ/mol	66.1011 ± 0.0040	542-92-7*590
Isocyanogen cation		1654.1	1656.5	± 1.4	kJ/mol	52.0343 ± 0.0016	133415-63-1*0
Chlorine atom pentacation		19147.	19149.	± 11.	kJ/mol	35.44996 ± 0.00090	20337-89-7*0
Diisocyanogen cation		1838.6	1842.6	± 3.1	kJ/mol	52.0343 ± 0.0016	78800-21-22
Water		-286.268	-292.708	± 0.025	kJ/mol	18.01528 ± 0.00033	7732-18-5*510
sec-Butylium		792.7	769.0	± 1.6	kJ/mol	57.1137 ± 0.0033	16548-59-7*0
2-Methylpentane		-180.14	-203.79	± 0.73	kJ/mol	86.1754 ± 0.0049	107-83-5*500
3-Methylpentane		-177.59	-201.86	± 0.76	kJ/mol	86.1754 ± 0.0049	96-14-0*500
Formaldehyde		-105.389	-109.229	± 0.096	kJ/mol	30.02598 ± 0.00087	50-00-0*21
2,3-Dimethylbutane		-182.39	-206.90	± 0.81	kJ/mol	86.1754 ± 0.0049	79-29-8*500
Trioxodinitrate anion		-87.3	-93.0	± 2.2	kJ/mol	76.01223 ± 0.00091	194856-62-7*1
2,2-Dimethylbutane		-187.90	-213.62	± 0.75	kJ/mol	86.1754 ± 0.0049	75-83-2*500
Peroxyhypochlorous acid cation		1050.8	1045.2	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-22
Fluorine atom		77.252	79.037	± 0.017	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*1
Oxygen atom tetracation		17719.207	17721.064	± 0.025	kJ/mol	15.99721 ± 0.00030	14127-65-2*0
Hydrogen peroxide cation		897.29	890.31	± 0.51	kJ/mol	34.01413 ± 0.00062	12325-10-9*11
Peroxyformate		-320.9	-326.7	± 1.8	kJ/mol	61.0174 ± 0.0012	104960-05-6*2
Peroxyformyl		-90.6	-96.1	± 1.8	kJ/mol	61.0168 ± 0.0012	56240-83-6*2
Nitrosyl nitrite anion		-100.2	-103.4	± 2.9	kJ/mol	76.01223 ± 0.00091	122413-35-82
Ammonia			-79.33	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*807
Hydroxylamine			-107.46	± 0.60	kJ/mol	33.02996 ± 0.00037	7803-49-8*500
Ammonia			-79.63	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*809
1,3-Butadiyne-1,4-diyl		1052.35	1062.32	± 0.65	kJ/mol	48.0428 ± 0.0032	78015-07-3*1
Ammonia			-80.16	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*815
Dihydrogen		-0.000	-0.058	± 0.000	kJ/mol	2.01588 ± 0.00014	1333-74-0*2
Hypochloroperoxoous acid, hydroxy ester		48.8	41.8	± 2.5	kJ/mol	84.4588 ± 0.0013	928652-99-7*2
Tetrabromomethane			58.7	± 1.2	kJ/mol	331.6267 ± 0.0041	558-13-4*500
Tetraiodomethane			392.5	± 8.0	kJ/mol	519.62858 ± 0.00081	507-25-5*500
Polyoxymethylene			-170.85	± 0.21	kJ/mol	30.02598 ± 0.00087	9002-81-7*500
Bromomethane		-56.63	-59.65	± 0.17	kJ/mol	94.9385 ± 0.0013	74-83-9*590
Ammonia			-80.38	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*818
Ammonia			-80.52	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*822
Hydroxylamine		-33.07	-43.44	± 0.42	kJ/mol	33.02996 ± 0.00037	7803-49-8*0
Formylimidogen		245.3	242.1	± 3.3	kJ/mol	43.02478 ± 0.00086	42288-92-6*2
Dioxofluorine anion		155.9	154.4	± 2.5	kJ/mol	50.99775 ± 0.00060	175861-93-50
Fluorine atom hexacation		45781.5	45783.3	± 1.8	kJ/mol	18.99511172 ± 0.00000050	14701-04-3*0
Ammonium hydroxide			-366.678	± 0.061	kJ/mol	35.04584 ± 0.00047	1336-21-6*1000
Hydrazoic acid anion		316.2	310.0	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*2
1-Hydroxyethyl		-42.86	-56.29	± 0.47	kJ/mol	45.0605 ± 0.0017	2348-46-1*0
Chlorodioxidenium		1215.1	1212.9	± 6.3	kJ/mol	67.4510 ± 0.0011	64710-10-7*0
Hydroxyoxoammoniumyl		1014.8	1008.5	± 2.0	kJ/mol	47.01293 ± 0.00061	80371-48-8*2
Ammonia			-80.56	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*828
Hydrazoic acid			257.59	± 0.48	kJ/mol	43.02816 ± 0.00022	7782-79-8*1000
Hydrazoic acid			272.57	± 0.48	kJ/mol	43.02816 ± 0.00022	7782-79-8*800
Carbonic acid			-698.991	± 0.030	kJ/mol	62.0248 ± 0.0012	463-79-6*1000
Ethyl bromide		-55.73	-91.26	± 0.26	kJ/mol	108.9651 ± 0.0019	74-96-4*500
Methylaminyliumyl		1388.3	1381.9	± 2.3	kJ/mol	29.04071 ± 0.00083	56924-51-7*1
Ammonia			-80.58	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*833
Vinyl iodide		139.6	130.8	± 1.2	kJ/mol	153.9497 ± 0.0016	593-66-8*0
Ammonia			-80.57	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*839
Difluorovinylidene cation		1181.5	1183.0	± 2.3	kJ/mol	62.0177 ± 0.0016	268566-71-8*0
Ammonia			-80.50	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*844
Formaldehyde			-171.20	± 0.59	kJ/mol	30.02598 ± 0.00087	50-00-0*800
Ammonia			-80.44	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*850
2-Hydroxyethylium		1024.6	1012.0	± 2.0	kJ/mol	45.0600 ± 0.0017	38607-31-7*1
Oxygen atom heptacation		113369.48	113371.34	± 0.12	kJ/mol	15.99556 ± 0.00030	14274-89-6*0
Chloro(chlorooxy)methylene		101.1	104.7	± 4.8	kJ/mol	98.9155 ± 0.0020	479587-31-0*12
Ammonia			-80.22	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*855
Carbon suboxide		-131.3	-116.2	± 1.1	kJ/mol	68.0309 ± 0.0025	504-64-3*500
Ammonia			-80.05	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*861
Acetaldehyde		-187.05	-191.77	± 0.29	kJ/mol	44.0526 ± 0.0017	75-07-0*500
m-Benzyne		614.7	605.3	± 1.4	kJ/mol	76.0960 ± 0.0048	1828-89-3*1
Propylene cation		975.14	961.61	± 0.19	kJ/mol	42.0792 ± 0.0024	34504-10-4*0
Cyclopropane cation		1022.3	1006.9	± 1.6	kJ/mol	42.0792 ± 0.0024	34496-93-0*0
Hydrazine monohydrate			-242.56	± 0.19	kJ/mol	50.06052 ± 0.00053	7803-57-8*500
Tropylide		261.5	245.2	± 2.0	kJ/mol	91.1310 ± 0.0056	34464-18-1*0
Dihydrogen anion		253.8	254.7	± 1.2	kJ/mol	2.01643 ± 0.00014	12184-89-3*0
Bicyclo[1.1.0]buta-1,3-diene-2,4-diyl		1047.19	1054.79	± 0.68	kJ/mol	48.0428 ± 0.0032	12184-80-4*2
Carbon trication		8770.942	8776.088	± 0.050	kJ/mol	12.00905 ± 0.00080	14067-06-2*0
Tribromine cation		1036.2	1013.5	± 2.5	kJ/mol	239.7115 ± 0.0030	33105-86-1*0
1,3-Butadiyn-4-ylium-1-yl		2109.9	2120.6	± 2.8	kJ/mol	48.0423 ± 0.0032	124708-46-9*0
Carbon pentacation		52824.604	52829.751	± 0.053	kJ/mol	12.00796 ± 0.00080	14280-11-6*0
Tetraoxodinitrate anion		-184.6	-187.8	± 2.4	kJ/mol	92.0116 ± 0.0012	63552-02-3*0
Peroxyhypochlorous acid anion		-2.8	-3.3	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-31
Carbon hexacation		100101.758	100106.905	± 0.053	kJ/mol	12.00741 ± 0.00080	16249-02-8*0
Carbide		2709.5	2714.7	± 2.7	kJ/mol	12.01289 ± 0.00080	12385-15-8*0
Dioxaziridine		277.6	270.9	± 1.9	kJ/mol	47.01348 ± 0.00061	67394-35-8*0
Fluorine atom octacation		155686.5	155688.3	± 1.8	kJ/mol	18.99401456 ± 0.00000050	15721-58-1*0
Methyl acetate		-394.15	-413.02	± 0.57	kJ/mol	74.0785 ± 0.0025	79-20-9*0
Tribromide			-129.55	± 0.23	kJ/mol	239.7125 ± 0.0030	14522-80-6*800
Nitrosyl nitrate		60.4	52.5	± 1.9	kJ/mol	92.0111 ± 0.0012	15969-55-8*2
Iodine monochloride			-24.048	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*590
Acetylene anion		356.9	356.7	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*0
Methyl formate		-346.94	-359.98	± 0.65	kJ/mol	60.0520 ± 0.0017	107-31-3*0
Ethyl formate		-375.1	-393.9	± 1.0	kJ/mol	74.0785 ± 0.0025	109-94-4*0
Succinic acid		-918.47	-940.19	± 0.12	kJ/mol	118.0880 ± 0.0034	110-15-6*500
1,2-Dibromoethane			-80.3	± 1.2	kJ/mol	187.8612 ± 0.0026	106-93-4*500
1,3-Butadien-2-ol		-42.7	-59.3	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*21
1,3-Butadien-2-ol		-53.4	-68.7	± 1.5	kJ/mol	70.0898 ± 0.0032	59120-04-6*1
Trioxygen difluoride		112.3	107.1	± 1.1	kJ/mol	85.99501 ± 0.00090	16829-28-0*0
Acrolein		-55.2	-65.3	± 1.2	kJ/mol	56.0633 ± 0.0024	107-02-8*0
1,2-Propadien-1-one cation		1012.7	1011.2	± 1.9	kJ/mol	54.0468 ± 0.0024	87612-93-9*0
2-Propynal cation		1168.2	1167.1	± 1.3	kJ/mol	54.0468 ± 0.0024	100815-70-1*0
Formylethynyl cation		1539.9	1541.8	± 2.7	kJ/mol	53.0389 ± 0.0024	85905-64-22
Formylethynyl cation		1540.6	1542.7	± 2.8	kJ/mol	53.0389 ± 0.0024	85905-64-21
Dioxofluorine cation		1667.0	1664.8	± 2.8	kJ/mol	50.99665 ± 0.00060	223566-05-0*0
1-Methylethenylium		995.2	986.0	± 1.9	kJ/mol	41.0713 ± 0.0024	50457-57-3*0
(Hydroxyimino)methyl		258.8	252.7	± 2.0	kJ/mol	44.03272 ± 0.00087	206442-92-4*2
1-Methylethenyl anion		199.3	188.2	± 2.0	kJ/mol	41.0723 ± 0.0024	65887-19-6*0
Oxygen atom trication		10249.929	10252.880	± 0.018	kJ/mol	15.99775 ± 0.00030	14127-64-1*0
Chlorine atom hexacation		28501.	28503.	± 11.	kJ/mol	35.44941 ± 0.00090	22541-73-7*0
Trihydrogen		215.9	218.3	± 1.1	kJ/mol	3.02382 ± 0.00021	12184-91-7*100
Cyanoacetylene cation		1495.46	1497.76	± 0.62	kJ/mol	51.0462 ± 0.0024	85398-68-1*0
Isocyanoacetylene cation		1567.7	1570.3	± 1.3	kJ/mol	51.0462 ± 0.0024	145076-03-5*0
Chlorine trifluoride cation		1053.4	1049.2	± 2.3	kJ/mol	92.44736 ± 0.00090	478167-77-0*0
Cyanoethynylium		1867.6	1874.3	± 3.2	kJ/mol	50.0383 ± 0.0024	104233-69-4*0
Hydrogen fluoride			-320.71	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*805
Acetylene		599.1	599.0	± 1.5	kJ/mol	26.0373 ± 0.0016	74-86-2*11
1-Propenylium		1233.8	1223.4	± 2.0	kJ/mol	41.0713 ± 0.0024	50457-58-4*1
1-Propenylide		210.4	199.3	± 2.0	kJ/mol	41.0723 ± 0.0024	65887-20-9*1
Hydrogen bromide			-120.62	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*952
Acetoxy		-182.21	-190.92	± 0.85	kJ/mol	59.0440 ± 0.0017	13799-69-4*0
3-Imino-2-propen-1-ylidene		530.7	526.3	± 1.2	kJ/mol	53.0627 ± 0.0024	916765-05-4*1
2-(Methylidyneamino)ethenyl		600.7	596.4	± 1.2	kJ/mol	53.0627 ± 0.0024	123416-74-0*1
Ketene		-45.36	-48.42	± 0.11	kJ/mol	42.0367 ± 0.0016	463-51-4*21
Trioxirane cation		1444.5	1442.4	± 2.2	kJ/mol	47.99765 ± 0.00090	153851-84-40
2-Chloro ozone		265.7	265.1	± 3.7	kJ/mol	83.4509 ± 0.0013	141801-66-30
Deuterium molecule cation		1492.286	1492.361	± 0.000	kJ/mol	4.02765497609 ± 0.00000000080	12184-84-8*0
Tetraoxygen		69.8	65.1	± 4.4	kJ/mol	63.9976 ± 0.0012	12596-83-7*21
Ammonium oxide		-428.46	-430.45	± 0.61	kJ/mol	52.07640 ± 0.00065	12161-77-2*500
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
Trihydrogen		745.878	743.094	± 0.062	kJ/mol	3.02382 ± 0.00021	12184-91-7*1
Fluorine atom trication		11182.871	11186.696	± 0.032	kJ/mol	18.99675746 ± 0.00000050	14700-88-0*0
Fluorine atom tetracation		19594.3	19596.6	± 1.7	kJ/mol	18.99620888 ± 0.00000050	14700-79-9*0
Chlorine atom dication		3668.475	3670.081	± 0.013	kJ/mol	35.45160 ± 0.00090	15723-23-6*0
Fluorosyl fluoride		227.	225.	± 21.	kJ/mol	53.99621 ± 0.00030	86825-57-2*2
Carbon monoxide		-113.804	-110.524	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*2
Deuteride		146.991	148.904	± 0.0021	kJ/mol	2.01465035791 ± 0.00000000040	14452-69-8*0
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 peroxide cation		931.04	924.18	± 0.98	kJ/mol	34.01413 ± 0.00062	12325-10-9*22
Propionic acid		-435.93	-453.82	± 0.59	kJ/mol	74.0785 ± 0.0025	79-09-4*0
But-3-en-1-yn-1-ide		559.0	558.4	± 2.2	kJ/mol	51.0672 ± 0.0032	58870-47-6*1
Water		-238.898	-241.801	± 0.025	kJ/mol	18.01528 ± 0.00033	7732-18-5*2
Chlorine atom tetracation		12615.5	12617.1	± 4.6	kJ/mol	35.45051 ± 0.00090	22541-74-8*0
Oxoniumyl ion		978.501	975.597	± 0.026	kJ/mol	18.01473 ± 0.00033	56583-62-1*1
Silicon cation		1236.89	1241.01	± 0.59	kJ/mol	28.08495 ± 0.00030	14067-07-3*0
Silicon atom dication		2814.02	2817.00	± 0.59	kJ/mol	28.08440 ± 0.00030	14175-55-4*0
Silicon atom trication		6045.60	6048.58	± 0.59	kJ/mol	28.08385 ± 0.00030	14175-56-5*0
Nitrous acid anion		-105.4	-109.4	± 1.8	kJ/mol	47.01403 ± 0.00061	256393-36-9*1
Dioxosilane		-901.5	-906.3	± 1.4	kJ/mol	60.08430 ± 0.00067	7631-86-9*515
Oxosilyliumyl		1022.0	1023.2	± 2.9	kJ/mol	44.08435 ± 0.00042	12359-18-1*0
Dinitrogen dimer		-0.88	0.84	± 0.67	kJ/mol	56.02696 ± 0.00028	154680-01-0*0
Trihydrogen cation		1110.304	1106.697	± 0.013	kJ/mol	3.02327 ± 0.00021	28132-48-1*2
Fluorine atom heptacation		63649.3	63651.1	± 1.8	kJ/mol	18.99456314 ± 0.00000050	14700-77-7*0
Ethynylene		820.005	826.577	± 0.092	kJ/mol	24.0214 ± 0.0016	12070-15-4*2
Oxygen atom octacation		197447.75	197449.60	± 0.12	kJ/mol	15.99501 ± 0.00030	21450-98-6*0
Ammonia			-77.030	± 0.056	kJ/mol	17.03056 ± 0.00022	7664-41-7*800
mu-Hydrotetrahydrodisilicon cation		981.8	969.1	± 2.9	kJ/mol	61.21015 ± 0.00069	160896-65-1*0
Di-mu-hydrotrihydrodisilicon cation		1033.9	1020.6	± 2.9	kJ/mol	61.21015 ± 0.00069	160896-65-10
Disilene anion		178.4	170.0	± 3.1	kJ/mol	60.20331 ± 0.00066	157379-08-3*0
Silylsilylene anion		160.1	151.4	± 3.1	kJ/mol	60.20331 ± 0.00066	286949-98-2*0
Silylsilylene		381.3	372.4	± 2.7	kJ/mol	60.20276 ± 0.00066	50420-90-1*1
mu-Hydrotrihydrodisilicon		317.7	307.7	± 2.2	kJ/mol	60.20276 ± 0.00066	497967-56-3*0
Ammonia			-75.73	± 0.57	kJ/mol	17.03056 ± 0.00022	7664-41-7*801
mu-Hydrotrihydrodisilicon cation		1160.1	1152.0	± 2.6	kJ/mol	60.20221 ± 0.00066	497967-55-20
Hydroxymethylene		112.68	108.92	± 0.27	kJ/mol	30.02598 ± 0.00087	19710-56-6*0
Silyloxoniumylidene		1096.1	1089.8	± 2.9	kJ/mol	47.10817 ± 0.00047	152720-17-7*1
2-Propen-1-ylium-1-ylidene		1373.2	1369.6	± 2.0	kJ/mol	39.0554 ± 0.0024	88000-25-3*0
Hydroxysilylium		600.1	591.5	± 2.9	kJ/mol	47.10817 ± 0.00047	66639-72-3*0
1,2-Propadien-1-ylium-1-yl-3-ylidene		1944.7	1952.6	± 1.9	kJ/mol	36.0316 ± 0.0024	118090-85-0*0
Nitrogen atom anion		488.2	490.5	± 2.3	kJ/mol	14.007289 ± 0.000070	17778-87-9*0
Nitrogen atom		470.580	472.442	± 0.024	kJ/mol	14.006740 ± 0.000070	17778-88-0*1
2-Iminoethyl		221.6	210.3	± 1.8	kJ/mol	42.0599 ± 0.0016	73843-90-0*1
Nitrogen atom dication		4728.994	4731.822	± 0.025	kJ/mol	14.005643 ± 0.000070	17439-59-7*0
1,5-Hexadiyne			385.9	± 1.9	kJ/mol	78.1118 ± 0.0048	628-16-0*500
2-Iminoethyl anion		110.6	100.1	± 2.3	kJ/mol	42.0604 ± 0.0016	73843-87-5*2
Isocyanogen bromide anion		104.8	101.6	± 4.6	kJ/mol	105.9220 ± 0.0013	238754-53-50
Fluorine atom dication		5132.471	5134.255	± 0.021	kJ/mol	18.99730604 ± 0.00000050	14701-07-6*0
Oxonium		605.88	599.13	± 0.17	kJ/mol	19.02267 ± 0.00037	13968-08-6*2
2-Iminoethylium		1108.3	1097.6	± 3.0	kJ/mol	42.0594 ± 0.0016	73843-91-1*2
Ethynylaminylium		1350.8	1349.0	± 2.5	kJ/mol	40.0435 ± 0.0016	103835-08-1*2
Bicyclo[3.1.0]hexa-1,3-diene		406.4	390.8	± 2.3	kJ/mol	78.1118 ± 0.0048	28425-23-2*0
2-Oxo-1-ethylium-1-yl		1292.0	1288.7	± 2.4	kJ/mol	42.0361 ± 0.0016	214464-96-7*12
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
(E)-2-Iminoethylium		1108.3	1094.8	± 3.0	kJ/mol	42.0594 ± 0.0016	91127-33-2*0
Oxoethylidene anion		92.3	89.0	± 2.3	kJ/mol	42.0372 ± 0.0016	106543-38-8*2
Oxygen atom pentacation		28708.788	28710.645	± 0.053	kJ/mol	15.99666 ± 0.00030	14127-66-3*0
Nitrogen atom trication		9306.68	9308.55	± 0.23	kJ/mol	14.005094 ± 0.000070	18396-22-0*0
Nitrogen atom tetracation		16781.74	16783.60	± 0.23	kJ/mol	14.004546 ± 0.000070	14452-70-1*0
mu-Oxodichlorine cation		1130.45	1126.84	± 0.63	kJ/mol	86.9043 ± 0.0018	51174-96-0*0
Bromodioxy		116.7	107.7	± 3.7	kJ/mol	111.9028 ± 0.0012	67177-47-3*0
Nitrogen atom pentacation		26226.70	26228.56	± 0.23	kJ/mol	14.003997 ± 0.000070	20508-99-0*0
mu-Oxodichlorate anion		-147.8	-147.7	± 2.5	kJ/mol	86.9053 ± 0.0018	365546-30-1*0
(Z)-2-Iminoethylium		1151.7	1143.0	± 3.3	kJ/mol	42.0594 ± 0.0016	91127-34-3*0
Oxygen atom dication		4949.459	4953.000	± 0.013	kJ/mol	15.99830 ± 0.00030	14127-63-0*0
2-Aminoethylium		1042.5	1025.9	± 2.4	kJ/mol	44.0752 ± 0.0017	54088-54-9*1
2-Aminoethyl anion		148.9	131.8	± 2.1	kJ/mol	44.0763 ± 0.0017	71857-14-2*0
(Z)-2-Iminoethylium		1151.7	1143.0	± 3.3	kJ/mol	42.0594 ± 0.0016	91127-34-3*11
1-Propen-1-yl-3-ylidene		656.7	653.3	± 1.1	kJ/mol	39.0559 ± 0.0024	84654-90-0*1
Nitrogen atom hexacation		79493.10	79494.96	± 0.23	kJ/mol	14.003449 ± 0.000070	15721-56-9*0
1,2-Diphenylethane		180.78	142.30	± 0.76	kJ/mol	182.2610 ± 0.0112	103-29-7*0
2-Naphthalenylium		1195.5	1177.6	± 3.5	kJ/mol	127.1620 ± 0.0080	79319-69-0*0
1-Naphthalenylium		1192.6	1174.6	± 3.4	kJ/mol	127.1620 ± 0.0080	79319-68-9*0
Biphenyl			113.9	± 1.1	kJ/mol	154.2078 ± 0.0096	92-52-4*590
Buckminsterfullerene		2524.7	2520.0	± 6.5	kJ/mol	720.6420 ± 0.0480	99685-96-8*0
Buckminsterfullerene		2329.6	2339.0	± 6.5	kJ/mol	720.6420 ± 0.0480	99685-96-8*500
Chlorine atom trication		7487.2	7490.2	± 3.3	kJ/mol	35.45105 ± 0.00090	16547-50-5*0
Cyclobutatrienyl		961.9	965.4	± 2.4	kJ/mol	49.0507 ± 0.0032	99417-52-40
Methylene		391.054	391.600	± 0.096	kJ/mol	14.02658 ± 0.00081	2465-56-7*0
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			-78.02	± 0.41	kJ/mol	17.03056 ± 0.00022	7664-41-7*803
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		21529.81	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		3528.25	3531.94	± 0.14	kJ/mol	32.0649 ± 0.0060	14127-58-3*0
Sulfur atom trication		6890.9	6892.9	± 3.2	kJ/mol	32.0644 ± 0.0060	22541-72-6*0
Sulfur atom tetracation		11447.1	11448.9	± 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
Chlorine atom		119.621	121.228	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*1
Dioxathiirane		167.3	164.9	± 2.3	kJ/mol	64.0648 ± 0.0060	191663-73-7*0
Difluorine cation		1514.301	1514.475	± 0.013	kJ/mol	37.9962578 ± 0.0000010	12184-86-0*0
Sulfur trioxide			-454.29	± 0.37	kJ/mol	80.0642 ± 0.0061	7446-11-9*500
Formic acid			-425.38	± 0.45	kJ/mol	46.0254 ± 0.0010	64-18-6*1000
3-Oxidedioxathiirane		-127.8	-132.8	± 2.2	kJ/mol	80.0642 ± 0.0061	2243010-16-2*0
Trioxathietane		263.7	258.6	± 2.3	kJ/mol	80.0642 ± 0.0061	2243010-16-20
Oxadithiirane		136.5	134.4	± 2.5	kJ/mol	80.1314 ± 0.0120	488092-02-0*0
Sulfanylideneoxidaniumthiolate		220.9	219.1	± 2.0	kJ/mol	80.1314 ± 0.0120	401811-43-6*0
Hydrogen peroxide		-129.411	-135.397	± 0.061	kJ/mol	34.01468 ± 0.00062	7722-84-1*2
Sulfuric acid			-887.62	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*893
Sulfuric acid		-878.84	-909.08	± 0.14	kJ/mol	98.0795 ± 0.0061	7664-93-9*800
Sulfuric acid			-886.27	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*821
Sulfuric acid			-891.17	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*835
Sulfuric acid			-891.54	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*837
Sulfuric acid			-893.33	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*840
Sulfuric acid			-894.29	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*841
Sulfuric acid			-895.75	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*842
Sulfuric acid			-897.78	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*844
Sulfuric acid			-886.44	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*906
Sulfuric acid			-886.83	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*823
Sulfuric acid			-887.18	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*826
Sulfuric acid			-887.32	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*827
Sulfuric acid			-891.36	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*836
Sulfuric acid			-892.79	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*954
Sulfuric acid			-898.51	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*845
Sulfuric acid			-899.42	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*847
Sulfuric acid			-899.69	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*848
Sulfuric acid			-900.15	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*849
Sulfuric acid monohydrate		-1126.24	-1127.40	± 0.14	kJ/mol	116.0948 ± 0.0062	10193-30-3*500
Sulfuric acid dihydrate		-1422.05	-1426.84	± 0.15	kJ/mol	134.1100 ± 0.0063	13451-10-0*500
Sulfuric acid trihydrate		-1715.99	-1720.11	± 0.16	kJ/mol	152.1253 ± 0.0064	40835-65-2*500
Sulfuric acid tetrahydrate		-2006.84	-2010.87	± 0.18	kJ/mol	170.1406 ± 0.0065	37006-20-5*500
Nitride		1879.1	1881.0	± 4.4	kJ/mol	14.008386 ± 0.000070	18851-77-9*0
Dihydrogen cation		1488.364	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*2
Sulfurous acid			-635.3	± 4.0	kJ/mol	82.0801 ± 0.0061	7782-99-2*800
Water trimer		-762.63	-776.73	± 0.20	kJ/mol	54.04584 ± 0.00099	31014-12-7*0
Nitrosodioxaziridine		413.7	408.2	± 1.8	kJ/mol	76.01168 ± 0.00091	132871-99-9*0
Acetic acid			-484.10	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*818
Hydrogen iodide			-55.968	± 0.099	kJ/mol	127.912410 ± 0.000076	10034-85-2*825
Hydrogen fluoride			-321.88	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*819
Oxoniumyl ion		978.750	975.599	± 0.026	kJ/mol	18.01473 ± 0.00033	56583-62-1*2
Acetic acid			-484.23	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*819
Chlorine pentafluoride cation		1005.9	996.9	± 3.2	kJ/mol	130.44417 ± 0.00090	478167-78-1*0
Nitric acid			-205.94	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*818
Dichloromethylene		229.88	231.07	± 0.64	kJ/mol	82.9161 ± 0.0020	1605-72-7*0
Acetic acid			-484.31	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*820
Hydrazine anion		232.3	217.9	± 4.1	kJ/mol	32.04579 ± 0.00031	65391-88-0*0
Hydrogen bromide			-120.55	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*840
Acetic acid			-484.43	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*821
Acetic acid			-484.51	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*822
Acetic acid			-484.54	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*891
Hydrogen bromide			-120.05	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*829
1,3-Butadienyl		385.5	375.3	± 2.0	kJ/mol	53.0825 ± 0.0032	86181-68-2*22
Acetic acid			-484.67	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*892
Ethoxyethene		-118.0	-136.5	± 1.5	kJ/mol	72.1057 ± 0.0033	109-92-2*0
Hydrogen iodide			-56.784	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*861
Acetic acid			-484.74	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*830
Acetic acid			-484.76	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*831
Cyclopentadienide		100.8	87.8	± 1.1	kJ/mol	65.0937 ± 0.0040	12127-83-2*0
Formic acid			-425.20	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*815
Ammonium hydroxide			-366.37	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*895
Acetic acid			-484.78	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*832
Acetic acid			-484.79	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*833
trans-Cycloheptene		141.9	103.8	± 1.9	kJ/mol	96.1702 ± 0.0057	45509-99-7*0
Cyclopropane		41.44	35.76	± 0.52	kJ/mol	42.0797 ± 0.0024	75-19-4*500
Acetic acid			-484.79	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*895
Acetic acid			-484.79	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*834
Nitric acid			-193.76	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*803
Ethenol		-113.38	-123.72	± 0.38	kJ/mol	44.0526 ± 0.0017	557-75-5*0
mu-Oxodioxodinitrogen		984.0	981.1	± 3.2	kJ/mol	76.01113 ± 0.00091	87950-63-8*1
Ethoxyethene		-111.5	-135.4	± 2.3	kJ/mol	72.1057 ± 0.0033	109-92-2*21
Vinyl alcohol cation		778.5	767.6	± 1.2	kJ/mol	44.0520 ± 0.0017	57239-63-1*0
Hydrogen chloride			-166.403	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*833
Acetic acid			-484.80	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*835
Hydrogen chloride			-166.708	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*896
Hydrogen fluoride			-322.09	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*830
Hydrogen bromide			-102.59	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*805
Acetic acid			-484.80	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*837
Acetic acid			-484.80	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*838
Phenol cation		746.17	727.38	± 0.64	kJ/mol	94.1107 ± 0.0048	40932-22-7*0
Phenol anion		22.8	7.8	± 4.9	kJ/mol	94.1118 ± 0.0048	38752-11-3*0
Acetic acid			-484.81	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*839
1,3-Butadienylium		1133.6	1123.6	± 2.5	kJ/mol	53.0820 ± 0.0032	86181-69-3*0
1-Hydroxyethylidene		57.35	47.04	± 0.77	kJ/mol	44.0526 ± 0.0017	30967-49-8*2
1-Hydroxyethylidene		57.35	47.04	± 0.77	kJ/mol	44.0526 ± 0.0017	30967-49-8*0
Acetic acid			-484.82	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*841
Hydroperoxonium		738.2	727.9	± 1.2	kJ/mol	35.02207 ± 0.00064	70850-26-9*0
Benzaldehyde cation		896.4	879.7	± 1.8	kJ/mol	106.1214 ± 0.0056	80226-59-1*0
Benzaldehyde anion		-55.6	-73.3	± 2.7	kJ/mol	106.1225 ± 0.0056	34473-57-9*0
Acetic acid			-484.70	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*844
Hydrogen fluoride			-321.95	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*906
Nitrogen atom		700.555	702.458	± 0.024	kJ/mol	14.006740 ± 0.000070	17778-88-0*2
Benzoyl anion		69.7	57.1	± 4.0	kJ/mol	105.1145 ± 0.0056	78944-74-8*0
Acetic acid			-484.84	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*850
Acetic acid			-484.85	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*852
Acetic acid			-484.86	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*855
Nitric acid			-206.01	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*819
Acetic acid			-484.87	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*861
Ammonium hydroxide			-365.29	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*806
Tetraoxidanyl		2.1	0.4	± 2.9	kJ/mol	65.0055 ± 0.0012	69696-93-1*0
Ammonium hydroxide			-366.37	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*834
1,1-Ethenediol		-307.66	-320.20	± 0.83	kJ/mol	60.0520 ± 0.0017	10375-04-9*0
1,1-Ethenediol		-302.5	-315.8	± 1.9	kJ/mol	60.0520 ± 0.0017	10375-04-9*2
Ammonium hydroxide			-366.23	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*819
m-Tolualdehyde			-125.6	± 1.3	kJ/mol	120.1485 ± 0.0064	620-23-5*500
Ethoxyethene		-111.0	-133.2	± 2.6	kJ/mol	72.1057 ± 0.0033	109-92-2*1
Hydrogen chloride			-166.738	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*842
1,1-Ethenediol		-296.1	-309.3	± 1.9	kJ/mol	60.0520 ± 0.0017	10375-04-9*3
Methoxymethylene		129.12	118.62	± 0.78	kJ/mol	44.0526 ± 0.0017	19527-10-7*2
Hydrogen iodide			-47.73	± 0.32	kJ/mol	127.912410 ± 0.000076	10034-85-2*809
Cyanogen		273.93	289.18	± 0.42	kJ/mol	52.0349 ± 0.0016	460-19-5*500
Hydrogen iodide			-56.525	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*840
Hydrogen bromide			-119.57	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*891
Glycolaldehyde		-304.47	-317.50	± 0.90	kJ/mol	60.0520 ± 0.0017	141-46-8*0
Hydrogen iodide			-55.701	± 0.095	kJ/mol	127.912410 ± 0.000076	10034-85-2*821
1-Aziridinide		243.9	231.5	± 3.3	kJ/mol	42.0604 ± 0.0016	1358579-49-3*0
Carbon dianion		1027.5	1033.0	± 4.9	kJ/mol	12.01180 ± 0.00080	50802-47-6*0
Carbon trianion		1813.2	1818.6	± 5.9	kJ/mol	12.01235 ± 0.00080	50802-48-7*0
Hydrogen chloride			-165.293	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*891
2-Aziridinyl		360.7	349.2	± 1.8	kJ/mol	42.0599 ± 0.0016	23838-09-70
Formic acid			-425.23	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*821
Methoxymethylene		129.12	118.62	± 0.78	kJ/mol	44.0526 ± 0.0017	19527-10-7*0
Formic acid			-425.25	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*822
1-Methylethylidene		316.03	303.13	± 0.98	kJ/mol	42.0797 ± 0.0024	40852-89-9*0
Iminomethyl		275.81	272.21	± 0.56	kJ/mol	28.03332 ± 0.00082	15691-95-9*0
Iminomethide		237.4	233.6	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*0
Formic acid			-425.26	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*891
Chloromethylene		320.36	320.65	± 0.89	kJ/mol	48.4713 ± 0.0012	2108-20-5*0
Hydrogen chloride			-166.430	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*895
Hydrogen bromide			-120.59	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*841
Formic acid			-425.28	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*825
Dinitrogen tetraoxide		-37.83	-26.98	± 0.19	kJ/mol	92.0111 ± 0.0012	10544-72-6*500
Carbon		1114.967	1120.114	± 0.044	kJ/mol	12.01070 ± 0.00080	7440-44-0*3
Hydrogen fluoride			-325.00	± 0.17	kJ/mol	20.006343 ± 0.000070	7664-39-3*847
Peroxyformyl		-100.64	-105.74	± 0.93	kJ/mol	61.0168 ± 0.0012	56240-83-6*0
Hydrogen fluoride			-321.92	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*904
Pyridiniumyl		1051.34	1035.40	± 0.61	kJ/mol	79.0994 ± 0.0040	16399-94-3*0
Pyridine anion		214.4	200.9	± 3.2	kJ/mol	79.1005 ± 0.0040	12169-63-0*0
Hydrogen bromide			-120.44	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*837
Water		-286.269	-285.797	± 0.025	kJ/mol	18.01528 ± 0.00033	7732-18-5*499
Nitric acid			-200.30	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*807
Water		-286.270	-292.710	± 0.025	kJ/mol	18.01528 ± 0.00033	7732-18-5*509
Acetone enol		-151.35	-168.16	± 0.69	kJ/mol	58.0791 ± 0.0025	29456-04-0*0
Acetone enol		-145.3	-162.6	± 1.9	kJ/mol	58.0791 ± 0.0025	29456-04-0*2
Hydrogen chloride			-166.752	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*899
Hydroxyamidogen		101.26	94.43	± 0.80	kJ/mol	32.02202 ± 0.00034	13940-32-4*0
Iodine monochloride		-36.511	-35.537	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*500
Perchloric acid cation		1190.2	1180.6	± 3.3	kJ/mol	100.4577 ± 0.0015	91712-47-9*0
1-Propen-2-ol-1-yl		101.57	90.21	± 0.87	kJ/mol	57.0712 ± 0.0024	1976041-84-5*0
1-Propen-2-ol-1-yl		106.5	94.5	± 1.9	kJ/mol	57.0712 ± 0.0024	1976041-84-5*12
1-Propen-2-ol-1-yl		114.0	102.8	± 1.9	kJ/mol	57.0712 ± 0.0024	1976041-84-5*21
1-Propen-2-ol-1-yl		115.1	104.3	± 1.9	kJ/mol	57.0712 ± 0.0024	1976041-84-5*22
Ammonium hydroxide			-365.91	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*813
Isocyanogen anion		386.6	388.7	± 3.3	kJ/mol	52.0354 ± 0.0016	83951-85-30
Ethylene anion		232.1	225.6	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*0
Hydrogen iodide			-55.09	± 0.12	kJ/mol	127.912410 ± 0.000076	10034-85-2*818
Formic acid			-425.31	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*892
Hydrogen fluoride			-322.18	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*831
Formic acid			-425.34	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*830
Hypochloroperoxoous acid, hydroxy ester		48.5	41.7	± 1.8	kJ/mol	84.4588 ± 0.0013	928652-99-7*0
Trihydrogen		745.878	743.199	± 0.062	kJ/mol	3.02382 ± 0.00021	12184-91-7*0
Peroxyformate		-341.15	-346.59	± 0.98	kJ/mol	61.0174 ± 0.0012	104960-05-6*0
Methyl nitrite		-52.43	-64.38	± 0.89	kJ/mol	61.0401 ± 0.0010	624-91-9*1
Methyl nitrite			-88.77	± 0.56	kJ/mol	61.0401 ± 0.0010	624-91-9*500
Hydrogen fluoride			-322.37	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*833
2-Hydroxyethenyl		138.00	132.18	± 0.72	kJ/mol	43.0446 ± 0.0016	108665-16-3*0
Ethyl nitrite		-80.2	-98.5	± 1.9	kJ/mol	75.0666 ± 0.0017	109-95-5*2
Ethyl nitrite		-78.2	-97.1	± 1.9	kJ/mol	75.0666 ± 0.0017	109-95-5*3
Oxonium		605.95	599.13	± 0.17	kJ/mol	19.02267 ± 0.00037	13968-08-6*1
Propyl nitrite		-95.9	-119.7	± 1.8	kJ/mol	89.0932 ± 0.0025	543-67-9*0
Propyl nitrite		-95.6	-120.2	± 2.5	kJ/mol	89.0932 ± 0.0025	543-67-9*2
Propyl nitrite		-95.7	-120.3	± 2.5	kJ/mol	89.0932 ± 0.0025	543-67-9*3
Propyl nitrite		-94.9	-119.5	± 2.5	kJ/mol	89.0932 ± 0.0025	543-67-9*4
Propyl nitrite		-94.9	-119.2	± 2.5	kJ/mol	89.0932 ± 0.0025	543-67-9*5
Propyl nitrite		-93.0	-118.0	± 2.5	kJ/mol	89.0932 ± 0.0025	543-67-9*6
Propyl nitrite		-92.7	-117.8	± 2.5	kJ/mol	89.0932 ± 0.0025	543-67-9*7
Propyl nitrite		-91.3	-116.2	± 2.8	kJ/mol	89.0932 ± 0.0025	543-67-9*8
1,2-Dibromoethene		121.2	101.0	± 2.0	kJ/mol	185.8453 ± 0.0026	540-49-8*0
Propylidene anion		300.9	286.7	± 3.2	kJ/mol	42.0803 ± 0.0024	121408-55-70
1-Methoxyethenol		-284.3	-302.8	± 1.2	kJ/mol	74.0785 ± 0.0025	4453-91-2*0
Hydrogen iodide			-56.362	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*833
Isoformyl anion		55.7	58.4	± 1.8	kJ/mol	29.01859 ± 0.00086	81747-63-9*0
2,2,4-Trimethylpentane		-171.0	-223.5	± 1.5	kJ/mol	114.2285 ± 0.0065	540-84-1*0
Chlorohydroxymethyl		-54.9	-60.6	± 1.1	kJ/mol	65.4787 ± 0.0012	147139-06-8*0
Hydrogen bromide			-120.62	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*898
Hydrogen bromide			-118.40	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*818
Hydrogen fluoride			-333.06	± 0.17	kJ/mol	20.006343 ± 0.000070	7664-39-3*866
Hydrogen iodide			-56.383	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*895
Hydrogen chloride			-166.336	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*832
Hydrogen bromide			-120.14	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*830
Hydrogen iodide			-56.395	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*834
Chloroethane		-134.34	-135.96	± 0.25	kJ/mol	64.5138 ± 0.0019	75-00-3*500
Ammonium hydroxide			-366.37	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*835
Hydrogen fluoride			-324.15	± 0.14	kJ/mol	20.006343 ± 0.000070	7664-39-3*843
Aminomethylidyne anion		481.6	478.1	± 3.2	kJ/mol	28.03387 ± 0.00082	96808-04-7*1
Ethoxyethene		-109.0	-132.2	± 2.3	kJ/mol	72.1057 ± 0.0033	109-92-2*11
Ammonium hydroxide			-365.62	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*809
1,1-Dibromoethane			-67.2	± 1.3	kJ/mol	187.8612 ± 0.0026	557-91-5*500
1-Hydroxy-2-propanone		-354.56	-373.89	± 0.84	kJ/mol	74.0785 ± 0.0025	116-09-6*0
Isocyanogen chloride cation		1481.0	1482.3	± 3.9	kJ/mol	61.4696 ± 0.0012	956475-91-5*0
Nitrosyl nitrate		48.3	40.4	± 1.8	kJ/mol	92.0111 ± 0.0012	15969-55-8*0
Formic acid			-425.35	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*831
3-Buten-2-one		-95.40	-110.94	± 0.85	kJ/mol	70.0898 ± 0.0032	78-94-4*0
Hydrogen chloride			-166.763	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*843
3-Buten-2-one		-93.8	-109.9	± 1.6	kJ/mol	70.0898 ± 0.0032	78-94-4*2
Formic acid			-425.35	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*832
1,3-Butadien-2-ol		-48.1	-64.4	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*12
Hydrogen bromide			-120.42	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*835
1,3-Butadien-2-ol		-37.9	-54.3	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*22
Hydrogen iodide			-55.809	± 0.095	kJ/mol	127.912410 ± 0.000076	10034-85-2*822
1,3-Butadien-2-ol		-42.7	-58.8	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*2
1,3-Butadien-2-ol		-53.4	-68.4	± 1.5	kJ/mol	70.0898 ± 0.0032	59120-04-6*0
Formic acid			-425.35	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*833
Hydrogen iodide			-36.92	± 0.56	kJ/mol	127.912410 ± 0.000076	10034-85-2*805
Nitric acid			-201.96	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*809
Hydrogen chloride			-166.487	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*835
Ammonium hydroxide			-366.18	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*852
Ammonium hydroxide			-366.25	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*820
Hydrogen iodide			-56.558	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*841
1,2-Propadien-1-one anion		49.7	48.5	± 3.1	kJ/mol	54.0479 ± 0.0024	159171-62-7*0
Fluorosyl fluoride anion		-147.1	-146.8	± 3.0	kJ/mol	53.99675 ± 0.00030	86825-57-20
Hydrogen fluoride			-322.13	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*908
Hydrogen bromide			-93.05	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*803
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
Oxiranylium		901.3	893.3	± 1.4	kJ/mol	43.0441 ± 0.0016	57789-76-1*0
2-Aziridinylium		1010.6	998.6	± 3.3	kJ/mol	42.0594 ± 0.0016	91127-35-40
Dioxymethylene		341.8	339.8	± 3.0	kJ/mol	45.0174 ± 0.0010	438586-67-5*0
Formylethynyl anion		100.4	101.7	± 3.4	kJ/mol	53.0400 ± 0.0024	85905-64-2*0
Diazanide		249.3	239.3	± 3.1	kJ/mol	31.03785 ± 0.00025	25415-88-7*0
2-Cyclopropen-1-one cation		1078.6	1075.5	± 2.0	kJ/mol	54.0468 ± 0.0024	100815-68-7*0
Formic acid			-425.35	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*895
Hydrogen bromide			-118.97	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*820
Oxiranyl anion		121.3	113.4	± 1.5	kJ/mol	43.0452 ± 0.0016	72722-59-9*0
Hydrogen chloride			-166.793	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*844
2-Propene-1,2-diol		-295.5	-314.5	± 1.2	kJ/mol	74.0785 ± 0.0025	44169-27-9*0
Isourea		-156.2	-172.8	± 2.6	kJ/mol	60.05534 ± 0.00091	4744-36-9*0
Hydrogen cyanide anion		129.527	129.048	± 0.089	kJ/mol	27.02593 ± 0.00081	12334-27-9*0
Hydrogen chloride			-166.822	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*846
Carbamoyl anion		-81.9	-87.8	± 3.1	kJ/mol	44.03327 ± 0.00087	78944-69-1*0
Formic acid			-425.20	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*816
Carbamoyl		74.1	68.3	± 2.7	kJ/mol	44.03272 ± 0.00087	2858-51-70
Carbamoyl		76.4	69.9	± 3.2	kJ/mol	44.03272 ± 0.00087	2858-51-72
Carbamoyl		96.3	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
Trioxidaniumyl		925.5	916.6	± 1.5	kJ/mol	50.01353 ± 0.00091	161321-37-5*0
Hydrogen chloride			-161.148	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*815
(Hydroxyimino)methyl		250.1	244.3	± 1.9	kJ/mol	44.03272 ± 0.00087	206442-92-4*0
Hydroxyaminylium		1019.5	1012.3	± 2.5	kJ/mol	32.02147 ± 0.00034	66097-71-0*0
2-Aziridinylium		1304.6	1292.9	± 4.2	kJ/mol	42.0594 ± 0.0016	91127-35-41
(Hydroxyimino)methyl		262.5	257.1	± 2.5	kJ/mol	44.03272 ± 0.00087	206442-92-4*3
(Hydroxyimino)methyl		281.4	275.9	± 2.5	kJ/mol	44.03272 ± 0.00087	206442-92-4*4
Hydrogen iodide			-49.969	± 0.095	kJ/mol	127.912410 ± 0.000076	10034-85-2*811
Nitric acid			-206.04	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*891
Hydrogen chloride			-166.847	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*850
Methane anion		27.3	19.4	± 5.1	kJ/mol	16.04301 ± 0.00085	27680-53-1*0
Ammonium hydroxide			-364.33	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*802
Isocyanic acid anion		-54.3	-57.4	± 3.0	kJ/mol	43.02533 ± 0.00086	444010-28-00
Formaldoxime		30.5	19.9	± 1.3	kJ/mol	45.04066 ± 0.00088	75-17-2*0
Carbonylmethyloxonium		561.3	553.1	± 3.1	kJ/mol	59.0435 ± 0.0017	24434-00-2*0
Formic acid			-425.36	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*834
Peroxyhypochlorous acid anion		-32.1	-33.9	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-30
Hydrogen bromide			-72.05	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*801
Hydrogen chloride			-162.010	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*816
Diisocyanogen anion		456.8	462.5	± 3.6	kJ/mol	52.0354 ± 0.0016	78800-22-30
Diisocyanogen cation		1825.3	1828.5	± 3.2	kJ/mol	52.0343 ± 0.0016	78800-21-20
Methoxyoxomethyl		-152.6	-160.3	± 1.2	kJ/mol	59.0440 ± 0.0017	16481-04-2*0
Methoxyoxomethyl		-151.7	-159.8	± 2.1	kJ/mol	59.0440 ± 0.0017	16481-04-2*3
Ammonium hydroxide			-366.30	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*821
Pentachloroethylium		838.1	836.5	± 3.3	kJ/mol	201.2844 ± 0.0048	7094-17-90
Hydrogen chloride			-165.186	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*822
Pentachloroethanide		-281.8	-280.3	± 3.9	kJ/mol	201.2854 ± 0.0048	263019-83-6*0
Cyanic acid cation		1135.7	1133.2	± 2.9	kJ/mol	43.02423 ± 0.00086	59780-31-3*0
Acetyloxoniumylidene		892.3	883.8	± 2.9	kJ/mol	59.0435 ± 0.0017	67057-47-0*1
Hydrobromate ion		-5.9	-12.4	± 4.3	kJ/mol	80.9125 ± 0.0010	85532-97-4*0
Fluorine atom nonacation		262121.1	262122.9	± 1.8	kJ/mol	18.99346598 ± 0.00000050	35424-07-8*0
Hydrogen iodide			-56.416	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*835
Cyanic acid anion		-9.2	-9.6	± 3.1	kJ/mol	43.02533 ± 0.00086	58199-47-6*0
Hydrogen chloride			-164.926	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*821
1-Cyanoethylidene		437.5	433.8	± 1.5	kJ/mol	53.0627 ± 0.0024	498544-34-6*0
Hydrogen bromide			-119.29	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*821
Hydrogen bromide			-116.28	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*815
Ammonium hydroxide			-366.12	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*817
Oxoiodonium		1066.1	1064.1	± 1.9	kJ/mol	142.90332 ± 0.00030	81182-81-2*0
Hydrogen iodide			-56.048	± 0.097	kJ/mol	127.912410 ± 0.000076	10034-85-2*828
Hydrogen isocyanide anion		191.62	191.80	± 0.32	kJ/mol	27.02593 ± 0.00081	96913-22-3*0
Hydrogen bromide			-120.24	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*831
3-Imino-2-propen-1-ylidene		530.7	526.3	± 1.2	kJ/mol	53.0627 ± 0.0024	916765-05-4*0
Hydrogen iodide			-56.584	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*898
3-Imino-2-propen-1-ylidene		571.8	567.0	± 1.6	kJ/mol	53.0627 ± 0.0024	916765-05-4*2
Hydrogen fluoride			-322.72	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*839
Hydrogen bromide			-119.74	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*825
1,2-Butadiene		137.79	138.84	± 0.64	kJ/mol	54.0904 ± 0.0032	590-19-2*500
Chlorine pentafluoride anion		-619.1	-622.6	± 4.3	kJ/mol	130.44526 ± 0.00090	184851-42-1*0
2-(Methylidyneamino)ethenyl		600.7	596.4	± 1.2	kJ/mol	53.0627 ± 0.0024	123416-74-0*0
Oxooxoniumylmethoxy		1178.3	1177.6	± 5.8	kJ/mol	60.0084 ± 0.0012	952586-28-6*0
2-(Methylidyneamino)ethenyl		634.5	630.4	± 1.6	kJ/mol	53.0627 ± 0.0024	123416-74-0*2
Formic acid			-425.36	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*835
Formic acid			-425.36	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*837
Nitric acid			-203.79	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*812
Hydrogen chloride			-166.885	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*852
1,2-Dichloroethene		3.81	-1.51	± 0.55	kJ/mol	96.9427 ± 0.0024	540-59-0*0
Ketene		-45.24	-48.42	± 0.11	kJ/mol	42.0367 ± 0.0016	463-51-4*22
Acetate			-485.10	± 0.27	kJ/mol	59.0446 ± 0.0017	71-50-1*800
Diazoethenylidene cation		1771.1	1773.1	± 3.5	kJ/mol	52.0343 ± 0.0016	130760-10-00
Diatomic bromine cation		1060.31	1045.36	± 0.23	kJ/mol	159.8075 ± 0.0020	12595-71-0*0
Hydrogen iodide			-51.307	± 0.099	kJ/mol	127.912410 ± 0.000076	10034-85-2*812
Formic acid			-425.36	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*838
Propylidyne		492.6	483.0	± 1.2	kJ/mol	41.0718 ± 0.0024	85056-54-8*0
Chlorine atom dianion		406.6	408.2	± 4.8	kJ/mol	35.45380 ± 0.00090	33944-49-9*0
2-Cyanovinyl		447.79	445.38	± 0.99	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
Formic acid			-425.37	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*839
(Formyloxy)methyl		-151.5	-159.6	± 1.1	kJ/mol	59.0440 ± 0.0017	3122-12-1*0
2-Isocyanovinyl		543.2	541.8	± 1.7	kJ/mol	52.0547 ± 0.0024	225798-14-1*0
Formic acid			-425.20	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*817
Formic acid			-425.20	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*818
Cyanomethyliumyl		1506.7	1508.2	± 2.3	kJ/mol	39.0355 ± 0.0016	34447-38-6*0
Cyanomethylene anion		286.5	287.1	± 1.5	kJ/mol	39.0366 ± 0.0016	12373-24-9*0
Cyanomethylene		479.9	483.2	± 1.1	kJ/mol	39.0361 ± 0.0016	2612-62-6*0
Carboxymethyl		-226.7	-236.6	± 1.1	kJ/mol	59.0440 ± 0.0017	2887-46-9*0
Hydrogen bromide			-120.47	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*838
Isocyanomethyliumyl		1505.9	1507.8	± 3.3	kJ/mol	39.0355 ± 0.0016	99045-54-2*0
Isocyanomethylene anion		400.5	401.3	± 2.1	kJ/mol	39.0366 ± 0.0016	144141-01-5*0
Isocyanomethylene		582.3	584.5	± 1.7	kJ/mol	39.0361 ± 0.0016	78694-65-2*0
Trihydrogen		254.5	250.7	± 1.2	kJ/mol	3.02382 ± 0.00021	12184-91-7*200
3-Oxo-1,2-propadien-1-ylium-1-yl		1380.3	1385.6	± 3.8	kJ/mol	52.0310 ± 0.0024	151455-13-9*0
3-Oxo-1,2-propadienylidene anion		224.3	230.2	± 3.5	kJ/mol	52.0320 ± 0.0024	109292-50-4*0
O--HH Complex		247.2	248.2	± 2.0	kJ/mol	18.01528 ± 0.00033	7732-18-5102
Hydrogen iodide			-56.605	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*842
Ammonium hydroxide			-366.32	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*891
Dichlorovinylidene		424.3	427.5	± 3.0	kJ/mol	94.9268 ± 0.0024	20394-25-6*0
Chlorovinylidene		429.2	430.9	± 2.9	kJ/mol	60.4820 ± 0.0018	70277-82-6*0
Hydrogen fluoride			-322.44	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*834
Diazoethenylidene anion		529.6	532.2	± 3.5	kJ/mol	52.0354 ± 0.0016	130760-11-10
2-Methoxy-2-oxoethyl		-203.0	-218.2	± 1.5	kJ/mol	73.0706 ± 0.0025	54668-31-4*0
Ethylidene		361.27	354.29	± 0.46	kJ/mol	28.0532 ± 0.0016	4218-50-2*0
Dioxodiazoxane		93.0	88.2	± 1.3	kJ/mol	76.01168 ± 0.00091	122413-35-8*0
Hydrogen chloride			-162.855	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*817
1,3-Cyclobutadiene cation		1215.7	1207.4	± 3.0	kJ/mol	52.0740 ± 0.0032	34531-09-4*0
Diazene		207.12	199.98	± 0.41	kJ/mol	30.02936 ± 0.00020	3618-05-1*0
Nitrous acid anion		-105.82	-109.29	± 0.78	kJ/mol	47.01403 ± 0.00061	256393-36-9*0
2-Methyl-2-cyclopropen-1-ylidene		448.0	441.8	± 1.2	kJ/mol	52.0746 ± 0.0032	185841-59-2*0
2-Methyl-2-cyclopropen-1-ylidene		670.6	664.6	± 2.8	kJ/mol	52.0746 ± 0.0032	185841-59-2*1
Ammonium hydroxide			-366.37	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*836
3H-diazirin-3-ylidene-methylene		837.3	839.9	± 2.4	kJ/mol	52.0349 ± 0.0016	204253-88-3*0
Fluoromethane cation		981.78	974.28	± 0.62	kJ/mol	34.03237 ± 0.00083	59122-96-2*0
Fluoromethane			-245.78	± 0.45	kJ/mol	34.03292 ± 0.00083	593-53-3*590
Nitric acid			-206.06	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*828
Formic acid			-425.31	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*809
Vinylvinylidene		494.1	488.8	± 1.7	kJ/mol	52.0746 ± 0.0032	148759-16-4*0
Vinylvinylidene		690.5	684.7	± 2.7	kJ/mol	52.0746 ± 0.0032	148759-16-4*1
Hydrogen fluoride			-321.86	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*888
Vinylvinylidene		695.4	689.0	± 3.3	kJ/mol	52.0746 ± 0.0032	148759-16-4*12
Vinylvinylidene cation		1429.8	1424.5	± 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
Cyclopropylidene		474.93	466.91	± 0.85	kJ/mol	40.0639 ± 0.0024	2143-70-6*0
Chloromethane		-106.52	-102.56	± 0.16	kJ/mol	50.4872 ± 0.0012	74-87-3*590
1,2-Butadien-1-ylidene		511.8	506.3	± 2.1	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
Dicarbon monoxide		377.12	381.16	± 0.83	kJ/mol	40.0208 ± 0.0016	12071-23-7*0
Nitric acid			-205.02	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*815
(Acetyloxy)methyl		-200.2	-214.0	± 1.5	kJ/mol	73.0706 ± 0.0025	2887-49-2*0
Bromomethane cation		996.21	981.29	± 0.17	kJ/mol	94.9380 ± 0.0013	12538-70-4*0
Hydrogen chloride			-166.102	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*830
COC vdW		589.7	598.5	± 1.5	kJ/mol	40.0208 ± 0.0016	12071-24-80
Ammonium hydroxide			-366.37	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*837
Diazene		207.12	199.98	± 0.41	kJ/mol	30.02936 ± 0.00020	3618-05-1*1
Hydrogen peroxide cation		897.32	890.31	± 0.51	kJ/mol	34.01413 ± 0.00062	12325-10-9*12
1,2,3-Butatrien-1-ylium		1271.8	1270.0	± 1.1	kJ/mol	51.0661 ± 0.0032	81932-79-8*0
Isocyanomethane			146.5	± 2.2	kJ/mol	41.0520 ± 0.0016	593-75-9*500
Hydrogen iodide			-52.23	± 0.12	kJ/mol	127.912410 ± 0.000076	10034-85-2*813
Ammonium hydroxide			-366.37	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*838
Nitric acid			-206.17	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*833
Hydrogen fluoride			-321.83	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*887
Iodomethane cation		944.68	935.28	± 0.18	kJ/mol	141.93844 ± 0.00083	12538-72-6*0
1-Buten-3-yn-1-yl		547.26	544.74	± 0.87	kJ/mol	51.0666 ± 0.0032	2810-61-9*0
1-Buten-3-ynylium		1482.3	1480.2	± 1.5	kJ/mol	51.0661 ± 0.0032	84654-85-3*0
But-1-en-3-yn-1-ide		419.7	419.1	± 1.2	kJ/mol	51.0672 ± 0.0032	119611-65-3*0
Hydrogen fluoride			-322.28	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*832
2-Propenylidene		417.4	410.5	± 1.5	kJ/mol	40.0639 ± 0.0024	19527-08-3*1
Nitrato		1290.61	1285.90	± 0.86	kJ/mol	62.00439 ± 0.00090	133057-96-2*0
Formic acid			-425.37	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*841
Fluoroform			-704.76	± 0.41	kJ/mol	70.01385 ± 0.00080	75-46-7*590
3-Buten-1-ynylium		1572.6	1570.2	± 1.7	kJ/mol	51.0661 ± 0.0032	103928-84-3*0
But-3-en-1-yn-1-ide		326.6	323.6	± 1.4	kJ/mol	51.0672 ± 0.0032	58870-47-6*0
Trihydrogen cation		1110.577	1106.695	± 0.013	kJ/mol	3.02327 ± 0.00021	28132-48-1*1
2-Propenylidene		417.4	410.5	± 1.5	kJ/mol	40.0639 ± 0.0024	19527-08-3*0
Ammonium hydroxide			-364.91	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*804
2-Propenylidene		419.0	411.5	± 2.3	kJ/mol	40.0639 ± 0.0024	19527-08-3*12
3-Methylene-1-cyclopropen-1-ylium		1398.7	1395.4	± 1.7	kJ/mol	51.0661 ± 0.0032	117469-28-0*0
Hydrogen fluoride			-324.44	± 0.14	kJ/mol	20.006343 ± 0.000070	7664-39-3*844
C=O-C cation		1585.8	1592.9	± 2.7	kJ/mol	40.0203 ± 0.0016	83483-98-1*0
Formic acid			-425.38	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*844
2-Cyclopropen-1-ylidenemethylium		1346.4	1343.8	± 1.8	kJ/mol	51.0661 ± 0.0032	112936-36-4*0
Hydrogen iodide			-56.077	± 0.095	kJ/mol	127.912410 ± 0.000076	10034-85-2*892
Formic acid			-425.38	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*850
Formic acid			-425.39	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*852
Formic acid			-425.40	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*855
1,3-Cyclobutadien-1-ylium		1388.2	1383.3	± 1.9	kJ/mol	51.0661 ± 0.0032	81913-77-1*0
Hydrogen bromide			-120.67	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*843
Diazene cation		1132.49	1125.83	± 0.64	kJ/mol	30.02881 ± 0.00020	76986-17-9*0
Nitric acid			-206.18	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*895
Cyclobutenide		320.3	307.9	± 3.2	kJ/mol	53.0830 ± 0.0032	60211-42-9*0
Nitric acid			-205.71	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*817
Difluorodioxidanium		1283.7	1280.1	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-00
Formic acid			-425.43	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*861
Hydrogen iodide			-52.90	± 0.16	kJ/mol	127.912410 ± 0.000076	10034-85-2*814
Phenylperoxy cation		1018.6	1001.6	± 3.1	kJ/mol	109.1022 ± 0.0049	956036-17-2*0
Phenylperoxy anion		-39.2	-56.2	± 3.3	kJ/mol	109.1032 ± 0.0049	956036-17-20
Hydrogen bromide			-111.07	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*809
Diazene cation		1132.49	1125.55	± 0.64	kJ/mol	30.02881 ± 0.00020	76986-17-9*1
Dioxoethylium		688.7	690.0	± 3.0	kJ/mol	57.0276 ± 0.0017	1994332-01-20
Water		-238.613	-241.801	± 0.025	kJ/mol	18.01528 ± 0.00033	7732-18-5*1
Ethanedial anion		-188.7	-190.2	± 3.1	kJ/mol	57.0287 ± 0.0017	1994332-01-2*0
Fulvene cation		1043.6	1027.8	± 2.7	kJ/mol	78.1113 ± 0.0048	34504-75-1*0
Fulvene anion		191.3	176.3	± 4.0	kJ/mol	78.1124 ± 0.0048	34504-63-7*0
Cyanomethylium		1256.69	1254.05	± 0.65	kJ/mol	40.0435 ± 0.0016	34430-18-7*0
Isocyanogen bromide cation		1469.7	1464.0	± 5.9	kJ/mol	105.9209 ± 0.0013	238754-53-5*0
Oxirene		273.19	271.03	± 0.92	kJ/mol	42.0367 ± 0.0016	157-18-6*0
Ammonium hydroxide			-366.38	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*831
2-Aziridinylium		1334.7	1323.7	± 4.9	kJ/mol	42.0594 ± 0.0016	91127-35-411
Isofulminic acid cation		1376.9	1374.8	± 2.9	kJ/mol	43.02423 ± 0.00086	117800-60-9*0
Dichlorine cation		1108.307	1108.286	± 0.0062	kJ/mol	70.9049 ± 0.0018	12595-90-3*0
Silicon atom tetracation		10401.12	10404.11	± 0.59	kJ/mol	28.08331 ± 0.00030	22537-24-2*0
Silicon anion		316.30	319.28	± 0.59	kJ/mol	28.08605 ± 0.00030	14337-02-1*0
Oxirene		387.9	384.5	± 1.4	kJ/mol	42.0367 ± 0.0016	157-18-6*1
Hydrogen peroxide		-129.390	-135.397	± 0.061	kJ/mol	34.01468 ± 0.00062	7722-84-1*1
Disilicon anion		375.2	379.0	± 1.8	kJ/mol	56.17155 ± 0.00060	64236-73-3*0
Diazene anion		265.5	258.7	± 2.0	kJ/mol	30.02991 ± 0.00020	100429-75-2*0
Hydroxyoxoethenylium		866.4	865.2	± 3.5	kJ/mol	57.0276 ± 0.0017	1994332-00-10
Ethynediolide		-132.9	-134.0	± 3.5	kJ/mol	57.0287 ± 0.0017	1994332-00-1*0
2-Aziridinide		315.9	303.8	± 3.5	kJ/mol	42.0604 ± 0.0016	111127-93-6*0
Hydrogen bromide			-120.37	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*895
Cyanogen bromide cation		1331.1	1324.8	± 1.4	kJ/mol	105.9209 ± 0.0013	34749-77-4*0
Ethynol cation		1063.8	1061.2	± 2.9	kJ/mol	42.0361 ± 0.0016	84005-02-7*0
Hydrogen iodide			-56.437	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*837
Bromoform			7.5	± 1.1	kJ/mol	252.7306 ± 0.0031	75-25-2*590
Hydrogen fluoride			-330.14	± 0.17	kJ/mol	20.006343 ± 0.000070	7664-39-3*861
Hydrogen iodide			-53.38	± 0.17	kJ/mol	127.912410 ± 0.000076	10034-85-2*815
Cyanogen iodide cation		1271.3	1271.2	± 1.7	kJ/mol	152.92136 ± 0.00080	34749-78-5*0
Silicon carbide anion		509.8	514.5	± 4.4	kJ/mol	40.09675 ± 0.00085	86017-99-4*0
Acetylide		843.0	849.6	± 3.2	kJ/mol	24.0225 ± 0.0016	34846-56-5*0
Nitrogen sesquioxide cation		1027.7	1023.7	± 4.8	kJ/mol	76.01113 ± 0.00091	10544-73-70
Silicon carbide		-70.7	-71.7	± 1.5	kJ/mol	40.09620 ± 0.00085	409-21-2*500
Tetrafluorosilane cation		-137.3	-141.7	± 5.9	kJ/mol	104.07856 ± 0.00030	62859-94-3*0
Difluoromethane			-468.98	± 0.35	kJ/mol	52.02339 ± 0.00081	75-10-5*590
(Methylamino)methyl anion		201.8	184.9	± 3.1	kJ/mol	44.0763 ± 0.0017	31277-25-50
Formylimidogen		245.2	242.1	± 4.6	kJ/mol	43.02478 ± 0.00086	42288-92-6*1
Hydrogen chloride			-166.516	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*837
Water anion		-50.1	-53.0	± 4.3	kJ/mol	18.01583 ± 0.00033	12259-30-2*0
Fluorosyl fluoride		192.8	193.3	± 2.3	kJ/mol	53.99621 ± 0.00030	86825-57-2*0
Dioxohydrazine		192.3	188.7	± 1.8	kJ/mol	60.01228 ± 0.00062	16824-89-8*1
Ethynol anion		163.5	165.0	± 3.3	kJ/mol	42.0372 ± 0.0016	864971-50-6*0
Ethynol		95.29	92.81	± 0.78	kJ/mol	42.0367 ± 0.0016	32038-79-2*0
Silylene		271.44	269.77	± 0.86	kJ/mol	30.10138 ± 0.00033	13825-90-6*0
Diazene anion		265.5	258.7	± 2.0	kJ/mol	30.02991 ± 0.00020	100429-75-2*1
Hydrogen fluoride			-326.67	± 0.17	kJ/mol	20.006343 ± 0.000070	7664-39-3*852
Peroxyformic acid		-279.22	-288.36	± 0.88	kJ/mol	62.0248 ± 0.0012	107-32-4*0
Oxonium			-285.796	± 0.025	kJ/mol	19.02267 ± 0.00037	13968-08-6*800
Disilane cation		1030.4	1017.6	± 2.2	kJ/mol	62.21809 ± 0.00073	96301-43-8*0
Hydrogen chloride			-166.922	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*855
Formic acid			-425.24	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*812
Hydrazoic acid anion		309.0	303.1	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*0
Formic acid			-425.21	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*819
Hydrodioxonitrogen cation		1130.3	1123.6	± 3.0	kJ/mol	47.01293 ± 0.00061	252986-76-8*0
Hydrogen chloride			-166.947	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*861
Ethynol		406.4	403.2	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*12
2-Aziridinide		329.9	317.8	± 4.0	kJ/mol	42.0604 ± 0.0016	111127-93-6*1
Disilene		288.7	280.0	± 1.9	kJ/mol	60.20276 ± 0.00066	15435-77-5*0
1-Methylene-2-propenylium		1059.4	1049.3	± 1.7	kJ/mol	53.0820 ± 0.0032	62698-26-4*0
Formic acid			-425.43	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*805
Ethanimine		55.71	41.07	± 0.73	kJ/mol	43.0678 ± 0.0016	20729-41-3*0
Chlorine atom heptacation		39520.	39522.	± 11.	kJ/mol	35.44886 ± 0.00090	22537-27-5*0
Silylsilylene		317.2	309.4	± 2.0	kJ/mol	60.20276 ± 0.00066	50420-90-1*0
Ammonium hydroxide			-366.31	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*843
Hydrazoic acid			261.45	± 0.65	kJ/mol	43.02816 ± 0.00022	7782-79-8*500
Dinitrogen anion		192.5	192.5	± 1.7	kJ/mol	28.01403 ± 0.00014	12185-02-3*0
Ethynol		409.4	406.3	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*13
Hydrodioxonitrate		-61.8	-68.2	± 3.2	kJ/mol	47.01403 ± 0.00061	61508-71-2*0
Ammonium hydroxide			-366.34	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*825
Ethynol		455.5	452.2	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*14
Peroxychlorous acid		95.4	89.8	± 2.0	kJ/mol	84.4588 ± 0.0013	177778-92-6*0
Di-mu-hydrodihydrodisilicon		374.6	364.3	± 2.4	kJ/mol	60.20276 ± 0.00066	129970-82-7*0
Di-mu-hydrodihydrodisilicon		374.6	364.2	± 2.4	kJ/mol	60.20276 ± 0.00066	129970-82-7*1
Di-mu-hydrodihydrodisilicon		544.1	536.1	± 3.7	kJ/mol	60.20276 ± 0.00066	129970-82-7*11
Di-mu-hydrodihydrodisilicon cation		1180.1	1172.5	± 3.3	kJ/mol	60.20221 ± 0.00066	129970-82-70
Di-mu-hydrodihydrodisilicon anion		288.3	280.2	± 3.4	kJ/mol	60.20331 ± 0.00066	129970-83-80
Ethynol		464.1	460.9	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*15
Nitric acid			-206.04	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*820
Hydrogen bromide			-120.62	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*957
Hydrogen chloride			-163.675	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*818
Ethylideneammoniumylidene		1309.9	1300.3	± 3.0	kJ/mol	42.0594 ± 0.0016	91127-36-5*1
Chlorous acid cation		996.6	991.6	± 3.1	kJ/mol	68.4589 ± 0.0011	99559-66-70
Ethylideneazanide		147.7	137.5	± 3.2	kJ/mol	42.0604 ± 0.0016	144810-43-5*0
Hydrogen fluoride			-321.80	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*817
Trioxygen difluoride		113.5	107.7	± 2.0	kJ/mol	85.99501 ± 0.00090	16829-28-0*2
Hydrogen bromide			-119.89	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*828
Hydrogen bromide			-117.06	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*816
Hydrogen chloride			-164.169	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*819
Formic acid			-425.27	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*811
Fluorosyl fluoride cation		1413.1	1413.4	± 3.5	kJ/mol	53.99566 ± 0.00030	86825-50-50
Hydrogen chloride			-166.541	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*838
Ammonium hydroxide			-366.38	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*832
Formic acid			-425.21	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*820
Hydroxysilyl anion		-219.3	-227.1	± 2.1	kJ/mol	47.10927 ± 0.00047	78450-47-2*0
Hydroxysilyl anion		-219.0	-226.9	± 2.7	kJ/mol	47.10927 ± 0.00047	78450-47-2*2
Bromine atom		161.994	155.931	± 0.056	kJ/mol	79.90400 ± 0.00100	10097-32-2*2
Nitric acid			-206.05	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*822
Oxide		651.	653.	± 15.	kJ/mol	16.00050 ± 0.00030	16833-27-5*0
2-Butynylium		1085.8	1077.6	± 1.3	kJ/mol	53.0820 ± 0.0032	64235-83-2*0
Benzvalene cation		1200.2	1184.8	± 2.7	kJ/mol	78.1113 ± 0.0048	81050-63-7*0
Hydrogen iodide			-55.51	± 0.11	kJ/mol	127.912410 ± 0.000076	10034-85-2*820
Dioxyamidogen		251.2	244.6	± 2.5	kJ/mol	47.01348 ± 0.00061	71843-95-3*1
Hydrogen iodide			-56.630	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*843
Hydrogen iodide			-56.500	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*954
Nitrosyl nitrite anion		-103.0	-106.1	± 2.8	kJ/mol	76.01223 ± 0.00091	122413-35-80
Oxiranylidene		213.5	209.3	± 1.4	kJ/mol	42.0367 ± 0.0016	50983-85-2*0
Hydrogen fluoride			-321.97	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*891
1,3-Butadienyl		372.22	363.00	± 0.87	kJ/mol	53.0825 ± 0.0032	86181-68-2*0
2-Iminoethyl		219.27	208.59	± 0.87	kJ/mol	42.0599 ± 0.0016	73843-90-0*0
1,3-Butadienyl		374.9	364.4	± 2.0	kJ/mol	53.0825 ± 0.0032	86181-68-2*12
2-Iminoethylium		1108.3	1097.6	± 3.0	kJ/mol	42.0594 ± 0.0016	73843-91-1*0
Butadienylacetylene		358.8	346.3	± 1.9	kJ/mol	78.1118 ± 0.0048	10420-90-3*0
Hydrogen bromide			-120.31	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*832
(3Z)-1,3-Hexadien-5-yne	$C=C/C=C\C#C$	358.8	346.2	± 2.5	kJ/mol	78.1118 ± 0.0048	5222-76-4*0
Divinylacetylene		361.8	350.6	± 2.0	kJ/mol	78.1118 ± 0.0048	821-08-9*0
Hydrogen fluoride			-322.00	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*825
Divinylacetylene		362.4	351.3	± 2.6	kJ/mol	78.1118 ± 0.0048	821-08-9*1
Biallenyl		410.6	399.5	± 1.5	kJ/mol	78.1118 ± 0.0048	29776-96-3*0
Trioxodinitrate anion		-104.2	-107.5	± 1.9	kJ/mol	76.01223 ± 0.00091	194856-62-7*0
Biallenyl		419.5	408.2	± 2.3	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
Hydrogen chloride			-165.819	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*892
Propargylallene		432.3	420.7	± 2.2	kJ/mol	78.1118 ± 0.0048	33142-15-3*2
Ammonium hydroxide			-366.36	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*840
Hydrogen iodide			-56.324	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*832
3-Methylene-1-penten-4-yne		362.6	350.2	± 2.2	kJ/mol	78.1118 ± 0.0048	6929-96-0*0
3-Methylene-1-penten-4-yne		374.7	362.4	± 2.8	kJ/mol	78.1118 ± 0.0048	6929-96-0*3
1,2,3,5-Hexatetraene		391.7	380.3	± 1.6	kJ/mol	78.1118 ± 0.0048	60239-33-0*0
Hydrogen iodide			-56.671	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*846
1,2,3,5-Hexatetraene		400.5	388.9	± 2.3	kJ/mol	78.1118 ± 0.0048	60239-33-0*2
2-Iminoethylium		1148.6	1140.1	± 3.3	kJ/mol	42.0594 ± 0.0016	73843-91-1*1
Chlorine atom		130.176	131.783	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*2
Carbonylbis(oxy)		-143.5	-144.6	± 3.0	kJ/mol	60.0089 ± 0.0012	16518-45-9*0
Hydrogen iodide			-44.15	± 0.30	kJ/mol	127.912410 ± 0.000076	10034-85-2*807
Isocyanogen chloride anion		103.0	107.4	± 3.9	kJ/mol	61.4707 ± 0.0012	923019-39-0*0
Peroxychlorous acid		101.5	95.4	± 3.6	kJ/mol	84.4588 ± 0.0013	177778-92-6*3
Hydrogen bromide			-120.72	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*846
Chlorous acid anion		-154.3	-156.1	± 3.3	kJ/mol	68.4600 ± 0.0011	99559-66-7*0
1,3-Butadienyl		384.0	374.5	± 2.0	kJ/mol	53.0825 ± 0.0032	86181-68-2*21
Ethynylamidogen anion		233.9	230.7	± 3.2	kJ/mol	40.0446 ± 0.0016	64066-03-1*0
Hydroxymethylene cation		971.9	968.3	± 1.4	kJ/mol	30.02543 ± 0.00087	135395-06-1*0
Formic acid			-425.22	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*813
Ethynylaminylium		1278.0	1277.6	± 2.6	kJ/mol	40.0435 ± 0.0016	103835-08-1*0
1-Methylallyl		152.57	136.10	± 0.80	kJ/mol	55.0984 ± 0.0032	15819-46-2*0
Hydrogen iodide			-56.697	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*850
Hydrogen fluoride			-321.93	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*890
1-Methyl-1-propenyl		239.98	224.60	± 0.67	kJ/mol	55.0984 ± 0.0032	71790-71-1*0
Nitric acid			-206.38	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*844
1-Methyl-1-propenyl		243.3	227.0	± 1.9	kJ/mol	55.0984 ± 0.0032	71790-71-1*2
Ammonium hydroxide			-366.37	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*830
Hydrogen iodide			-56.278	± 0.092	kJ/mol	127.912410 ± 0.000076	10034-85-2*831
1-Butenyl		263.39	246.33	± 0.69	kJ/mol	55.0984 ± 0.0032	2669-61-6*0
Hydrogen fluoride			-322.52	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*835
1-Butenyl		263.8	246.6	± 1.9	kJ/mol	55.0984 ± 0.0032	2669-61-6*3
2-Hydroxyethyl		-13.07	-26.33	± 0.49	kJ/mol	45.0605 ± 0.0017	4422-54-2*0
Hydroperoxonium		762.5	752.7	± 2.0	kJ/mol	35.02207 ± 0.00064	70850-26-9*2
1-Propen-1-yl-3-ylidene		656.7	653.3	± 1.1	kJ/mol	39.0559 ± 0.0024	84654-90-0*0
Ethylamine			-76.88	± 0.68	kJ/mol	45.0837 ± 0.0017	75-04-7*500
Formic acid			-425.21	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*814
Tetraoxidanyl		76.7	69.5	± 6.1	kJ/mol	65.0055 ± 0.0012	69696-93-1*1
Water dimer cation		556.9	546.4	± 3.0	kJ/mol	36.03001 ± 0.00066	158061-35-9*0
Acetic acid			-484.79	± 0.27	kJ/mol	60.0520 ± 0.0017	64-19-7*1000
2-Iminoethyl anion		104.5	94.0	± 2.1	kJ/mol	42.0604 ± 0.0016	73843-87-5*0
1-Aminoethyl anion		174.4	156.8	± 3.2	kJ/mol	44.0763 ± 0.0017	59263-55-7*0
Ammonium hydroxide			-365.53	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*808
Oxoethylidene		261.1	258.3	± 1.1	kJ/mol	42.0367 ± 0.0016	39920-84-8*0
Cyanic fluoride cation		1294.3	1294.7	± 1.1	kJ/mol	45.01529 ± 0.00080	62532-69-8*0
Ethylaminylium		1092.3	1077.1	± 2.4	kJ/mol	44.0752 ± 0.0017	54387-08-5*1
Ethylaminylium		1094.7	1079.0	± 2.9	kJ/mol	44.0752 ± 0.0017	54387-08-5*12
Cyanic fluoride anion		-20.6	-18.6	± 2.9	kJ/mol	45.01639 ± 0.00080	34507-50-1*0
Hydrogen bromide			-120.49	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*839
1,2-Difluoroethene		-302.83	-308.93	± 0.89	kJ/mol	64.0341 ± 0.0016	1691-13-0*0
Formic acid			-425.37	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*807
N-Methylethanamine			-75.1	± 2.3	kJ/mol	59.1103 ± 0.0025	624-78-2*500
Nitrosodioxaziridine		413.9	408.1	± 3.2	kJ/mol	76.01168 ± 0.00091	132871-99-9*2
1-Propen-1-yl-3-ylidene		656.7	653.2	± 2.0	kJ/mol	39.0559 ± 0.0024	84654-90-0*12
2-Oxo-1-ethylium-1-yl		1289.4	1286.8	± 2.5	kJ/mol	42.0361 ± 0.0016	214464-96-7*1
2-Methyl-2-propanamine			-150.56	± 0.54	kJ/mol	73.1369 ± 0.0033	75-64-9*590
Ammonium hydroxide			-366.28	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*846
Oxoethylidene anion		86.9	84.2	± 2.1	kJ/mol	42.0372 ± 0.0016	106543-38-8*0
Hydrogen iodide			-56.140	± 0.097	kJ/mol	127.912410 ± 0.000076	10034-85-2*829
Naphthalene cation		956.84	933.76	± 0.60	kJ/mol	128.1700 ± 0.0080	34512-27-1*0
Naphthalene anion		187.5	164.6	± 3.1	kJ/mol	128.1711 ± 0.0080	34509-91-6*0
1-Iminoethyl		233.0	222.9	± 1.1	kJ/mol	42.0599 ± 0.0016	128365-64-0*0
Diazenide		175.6	176.7	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*0
Acetic acid			-483.01	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*923
Hydrogen iodide			-55.35	± 0.11	kJ/mol	127.912410 ± 0.000076	10034-85-2*819
Hydrogen peroxide			-190.69	± 0.30	kJ/mol	34.01468 ± 0.00062	7722-84-1*800
Hydrogen fluoride			-323.40	± 0.12	kJ/mol	20.006343 ± 0.000070	7664-39-3*841
1-Propen-1-yl-3-ylidene		665.8	662.3	± 2.0	kJ/mol	39.0559 ± 0.0024	84654-90-0*13
Peroxyhypochlorous acid cation		1030.4	1024.6	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-20
Hydrogen bromide			-120.35	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*833
Hydrogen fluoride			-323.84	± 0.12	kJ/mol	20.006343 ± 0.000070	7664-39-3*842
Methanediol		-379.16	-392.55	± 0.74	kJ/mol	48.0413 ± 0.0010	463-57-0*0
1-Iminoethyl		252.3	242.3	± 2.1	kJ/mol	42.0599 ± 0.0016	128365-64-0*1
1-Iminoethylium		833.6	823.1	± 3.0	kJ/mol	42.0594 ± 0.0016	128365-64-00
1-Propen-1-yl-3-ylidene		699.3	696.4	± 3.4	kJ/mol	39.0559 ± 0.0024	84654-90-0*2
Hydrogen iodide			-54.03	± 0.17	kJ/mol	127.912410 ± 0.000076	10034-85-2*816
1-Iminoethylium		1342.1	1333.2	± 3.9	kJ/mol	42.0594 ± 0.0016	128365-64-01
Difluorovinylidene anion		-88.2	-87.1	± 2.3	kJ/mol	62.0188 ± 0.0016	107693-92-5*0
Hydrogen iodide			-56.199	± 0.097	kJ/mol	127.912410 ± 0.000076	10034-85-2*830
Methylaminyliumyl		1423.0	1416.1	± 2.3	kJ/mol	29.04071 ± 0.00083	56924-51-7*2
Dibromovinylidene		509.9	498.8	± 4.1	kJ/mol	183.8294 ± 0.0026	261771-36-2*0
Ammonium hydroxide			-366.35	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*841
Butadiynylium		1781.2	1787.7	± 3.2	kJ/mol	49.0502 ± 0.0032	76108-67-3*0
Fluorovinylidene		298.9	300.1	± 3.1	kJ/mol	44.0277 ± 0.0016	70302-00-0*0
(Dimethylamino)methyl anion		190.5	166.3	± 3.3	kJ/mol	58.1029 ± 0.0025	125231-49-4*0
1-Iminoethylium		1378.2	1368.7	± 4.3	kJ/mol	42.0594 ± 0.0016	128365-64-011
Hydrogen fluoride			-325.44	± 0.17	kJ/mol	20.006343 ± 0.000070	7664-39-3*850
Hydrogen fluoride			-322.03	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*828
1-Iminoethanide		185.6	175.5	± 3.2	kJ/mol	42.0604 ± 0.0016	128365-65-10
Helium		0.000	0.000	± 0.000	kJ/mol	4.0026020 ± 0.0000020	7440-59-7*2
Acetic acid			-482.91	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*801
1-Iminoethanide		193.1	182.5	± 3.6	kJ/mol	42.0604 ± 0.0016	128365-65-11
Helium dication		7622.839	7622.839	± 0.000	kJ/mol	4.0015048 ± 0.0000020	12587-46-1*0
Carbonate			-675.155	± 0.055	kJ/mol	60.0100 ± 0.0012	3812-32-6*800
Acetic acid			-482.85	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*802
Ammonium hydroxide			-366.33	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*842
Bromovinylidene		466.1	460.1	± 3.8	kJ/mol	104.9333 ± 0.0019	161957-27-3*0
Methoxyethene		-89.5	-106.8	± 1.1	kJ/mol	58.0791 ± 0.0025	107-25-5*0
Dihelium		1733.310	1729.576	± 0.018	kJ/mol	8.0052040 ± 0.0000040	12184-98-4*0
Dihelium		1761.349	1757.613	± 0.018	kJ/mol	8.0052040 ± 0.0000040	12184-98-4*2
Difluorophosgene anion		-602.3	-604.2	± 3.2	kJ/mol	66.00745 ± 0.00085	474815-26-4*0
Hydrohelate		143.256	139.027	± 0.0021	kJ/mol	5.011091 ± 0.000070	12325-01-8*0
1,2-Butadienylium		1099.2	1089.8	± 1.2	kJ/mol	53.0820 ± 0.0032	65114-67-20
Hydrogen chloride			-165.977	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*829
Diiodine cation		963.523	960.408	± 0.018	kJ/mol	253.808391 ± 0.000060	28712-14-3*0
Nitric acid			-206.43	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*850
Hydroxyformyl		-181.18	-183.73	± 0.42	kJ/mol	45.0174 ± 0.0010	2564-86-5*0
Fluoro(fluorooxy)methylene		-134.8	-136.0	± 1.4	kJ/mol	66.00691 ± 0.00085	479587-30-9*0
Acetic acid			-482.87	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*803
Nitric acid			-206.50	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*855
Acetic acid			-482.96	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*804
Methylaminyliumyl		1388.3	1381.9	± 2.3	kJ/mol	29.04071 ± 0.00083	56924-51-7*0
Acetic acid			-483.04	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*805
2-Hydroxyethylium		1019.1	1007.0	± 1.5	kJ/mol	45.0600 ± 0.0017	38607-31-7*0
Hydrogen peroxide cation		897.29	890.31	± 0.51	kJ/mol	34.01413 ± 0.00062	12325-10-9*0
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
Fluorine atom		82.087	83.872	± 0.017	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*2
Hydroneonate		143.096	142.084	± 0.035	kJ/mol	21.18819 ± 0.00060	75514-98-6*0
Phosgene cation		897.0	896.0	± 1.7	kJ/mol	98.9150 ± 0.0020	73249-38-4*0
Phosgene			-242.79	± 0.24	kJ/mol	98.9155 ± 0.0020	75-44-5*501
N-Methylenemethaniminium		904.3	893.3	± 3.1	kJ/mol	42.0594 ± 0.0016	88333-01-1*0
Phosgene		-255.49	-242.79	± 0.24	kJ/mol	98.9155 ± 0.0020	75-44-5*502
Krypton dication		3701.124	3701.124	± 0.013	kJ/mol	83.7989 ± 0.1000	18469-91-5*0
1,3-Butadiyne-1,4-diyl		1084.09	1093.89	± 0.84	kJ/mol	48.0428 ± 0.0032	78015-07-3*2
Xenon dication		3194.14	3194.14	± 0.36	kJ/mol	131.2889 ± 0.0200	14066-95-6*0
N-Methylenemethaniminium		1157.1	1147.2	± 4.0	kJ/mol	42.0594 ± 0.0016	88333-01-1*1
Hydrogen bromide			-119.49	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*822
Hydrogen iodide			-56.454	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*838
Hydrogen chloride			-164.500	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*820
Hydrogen iodide			-54.592	± 0.092	kJ/mol	127.912410 ± 0.000076	10034-85-2*817
Acetic acid			-483.15	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*807
Chloro(chlorooxy)methylene		73.5	73.9	± 3.6	kJ/mol	98.9155 ± 0.0020	479587-31-0*0
Chloro(chlorooxy)methylene		98.	105.	± 15.	kJ/mol	98.9155 ± 0.0020	479587-31-0*1
Acetic acid			-483.18	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*808
Sulfur atom hexacation		26947.2	26949.0	± 3.4	kJ/mol	32.0627 ± 0.0060	22537-26-4*0
Bicyclo[1.1.0]buta-1,3-diene-2,4-diyl		1133.1	1141.0	± 2.7	kJ/mol	48.0428 ± 0.0032	12184-80-4*1
Sulfur atom dianion		454.1	455.9	± 3.2	kJ/mol	32.0671 ± 0.0060	18496-25-8*0
Hydroxymethylene anion		147.2	144.2	± 1.6	kJ/mol	30.02653 ± 0.00087	207914-87-2*0
Disulfur cation		1030.23	1030.82	± 0.33	kJ/mol	64.1315 ± 0.0120	12597-02-3*0
Disulfur anion		-34.0	-33.1	± 1.2	kJ/mol	64.1325 ± 0.0120	12185-15-8*0
O--HH Complex		247.6	248.9	± 2.7	kJ/mol	18.01528 ± 0.00033	7732-18-5101
Isocyanic fluoride cation		1618.2	1618.8	± 4.0	kJ/mol	45.01529 ± 0.00080	16992-26-00
Formic acid cation		721.93	715.40	± 0.25	kJ/mol	46.0248 ± 0.0010	50614-05-6*0
Sulfonyl cation		897.07	894.81	± 0.13	kJ/mol	64.0643 ± 0.0060	12439-77-9*0
Imidogen		358.74	358.79	± 0.16	kJ/mol	15.014680 ± 0.000099	13774-92-0*1
Sulfur dioxide		-331.4	-320.1	± 1.9	kJ/mol	64.0648 ± 0.0060	7446-09-5*500
N-?Methylidynemethanaminium		881.0	870.2	± 3.0	kJ/mol	42.0594 ± 0.0016	64709-60-0*0
Hydrogen bromide			-120.74	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*850
Formic acid anion		-256.2	-262.3	± 1.8	kJ/mol	46.0259 ± 0.0010	19066-82-1*0
Hydrogen bromide			-117.76	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*817
Oxosulfate		-102.59	-101.83	± 0.50	kJ/mol	48.0659 ± 0.0060	12269-52-2*0
Acetic acid			-483.22	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*809
Sulfur trioxide cation		847.66	844.75	± 0.68	kJ/mol	80.0637 ± 0.0061	12710-95-1*0
Hydroperoxyimidogen		111.9	109.0	± 2.8	kJ/mol	47.01348 ± 0.00061	877456-58-1*2
Sulfite		-275.1	-280.7	± 4.4	kJ/mol	80.0653 ± 0.0061	14265-45-3*0
Hydroxyformyl anion		-319.55	-321.41	± 0.57	kJ/mol	45.0180 ± 0.0010	78944-70-4*0
Chlorohydroxymethylene		14.4	11.5	± 3.2	kJ/mol	64.4707 ± 0.0012	147723-60-2*2
Sulfur oxide peroxide		-25.9	-30.2	± 2.3	kJ/mol	80.0642 ± 0.0061	175799-68-5*0
Chlorohydroxymethylene		14.0	11.3	± 2.5	kJ/mol	64.4707 ± 0.0012	147723-60-2*0
Sulfur oxide peroxide		-3.4	-7.0	± 3.0	kJ/mol	80.0642 ± 0.0061	175799-68-5*1
Ammonium hydroxide			-365.75	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*811
(Chlorooxy)methylene		155.5	155.3	± 3.7	kJ/mol	64.4707 ± 0.0012	331419-80-8*1
Nitrogen atom heptacation		143853.26	143855.13	± 0.23	kJ/mol	14.002900 ± 0.000070	40549-08-4*0
Disulfur oxide cation		970.67	969.39	± 0.61	kJ/mol	80.1309 ± 0.0120	135758-60-0*0
Oxothioxosulfate		-231.81	-233.42	± 0.87	kJ/mol	80.1319 ± 0.0120	12143-07-6*0
(Chlorooxy)methylene		119.2	117.9	± 2.7	kJ/mol	64.4707 ± 0.0012	331419-80-8*0
Nitrosodioxaziridine		415.4	409.5	± 2.8	kJ/mol	76.01168 ± 0.00091	132871-99-9*3
Sulfoniumyl		992.68	989.77	± 0.19	kJ/mol	34.0813 ± 0.0060	26453-60-1*0
Dihydrogen sulfide ion		108.3	106.9	± 3.2	kJ/mol	34.0824 ± 0.0060	12311-21-6*0
Imidogen		509.34	509.39	± 0.17	kJ/mol	15.014680 ± 0.000099	13774-92-0*2
(Methylimino)methyl		277.9	267.8	± 1.1	kJ/mol	42.0599 ± 0.0016	117928-23-1*0
Acetic acid			-483.28	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*811
(Methylimino)methyl		297.0	287.0	± 2.0	kJ/mol	42.0599 ± 0.0016	117928-23-1*2
Sulfuric acid cation		401.4	388.4	± 3.3	kJ/mol	98.0789 ± 0.0061	247933-66-0*0
(Methylimino)methanide		222.9	212.2	± 3.2	kJ/mol	42.0604 ± 0.0016	64709-60-00
(Methylimino)methanide		236.5	225.6	± 3.6	kJ/mol	42.0604 ± 0.0016	64709-60-02
Chloroformyl anion		-356.5	-352.9	± 3.2	kJ/mol	63.4633 ± 0.0012	41976-93-6*0
Difluorodioxidane anion		-251.	-251.	± 28.	kJ/mol	69.99615 ± 0.00060	7783-45-10
Sulfate			-909.08	± 0.14	kJ/mol	96.0647 ± 0.0061	14808-79-8*800
Nitric acid			-206.31	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*841
Isocyanic fluoride anion		74.1	75.8	± 5.7	kJ/mol	45.01639 ± 0.00080	357426-78-9*0
Sulfuric acid			-880.34	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*815
Sulfuric acid			-881.95	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*816
Sulfuric acid			-883.44	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*817
Sulfuric acid			-884.73	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*818
Sulfuric acid			-885.40	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*819
Sulfuric acid			-885.80	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*820
Hydrogen bromide			-119.94	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*892
Formate			-425.48	± 0.45	kJ/mol	45.0180 ± 0.0010	71-47-6*800
Hydrogen chloride			-166.253	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*831
Sulfuric acid			-888.00	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*829
Sulfuric acid			-888.44	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*830
Sulfuric acid			-889.18	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*831
Sulfuric acid			-889.79	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*832
Sulfuric acid			-890.31	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*833
Sulfuric acid			-890.80	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*834
Hydrogen iodide			-56.734	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*852
Hydrogen bromide			-120.78	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*852
Sulfuric acid			-891.86	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*838
Trihydrogen		477.4	474.7	± 2.3	kJ/mol	3.02382 ± 0.00021	12184-91-7*201
Hydrogen iodide			-56.768	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*855
Hydrogen iodide			-55.860	± 0.095	kJ/mol	127.912410 ± 0.000076	10034-85-2*891
Sulfuric acid			-896.92	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*843
Acetic acid			-483.36	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*812
Propynylidene		597.7	599.5	± 1.3	kJ/mol	38.0480 ± 0.0024	67152-18-5*2
Hydrogen peroxide cation		931.06	924.18	± 0.98	kJ/mol	34.01413 ± 0.00062	12325-10-9*21
Sulfuric acid			-903.14	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*852
Sulfuric acid			-905.84	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*855
Sulfuric acid			-907.13	± 0.13	kJ/mol	98.0795 ± 0.0061	7664-93-9*861
2-Iodoethanol		-131.9	-150.1	± 2.5	kJ/mol	171.9650 ± 0.0017	624-76-0*0
Hydrogen chloride			-166.680	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*841
Acetic acid			-483.44	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*813
Chlorine chlorite		168.6	166.4	± 1.3	kJ/mol	102.9042 ± 0.0019	105206-44-8*0
Acetic acid			-483.52	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*814
Acetic acid			-483.60	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*815
Cyanogen chloride cation		1326.25	1327.58	± 0.97	kJ/mol	61.4696 ± 0.0012	37612-72-9*0
Methoxyethene		-82.1	-99.2	± 2.4	kJ/mol	58.0791 ± 0.0025	107-25-5*1
Hydrogen fluoride			-322.66	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*838
Acetic acid			-483.75	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*816
Formaldehyde		-105.263	-109.229	± 0.096	kJ/mol	30.02598 ± 0.00087	50-00-0*22
Hydrogen bromide			-118.74	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*819
Hydrogen bromide			-120.82	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*855
Hydrogen fluoride			-322.59	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*837
Hydrogen fluoride			-321.40	± 0.17	kJ/mol	20.006343 ± 0.000070	7664-39-3*1000
Hydrogen fluoride			-322.14	± 0.11	kJ/mol	20.006343 ± 0.000070	7664-39-3*909
1-Aminoethenylium		900.0	889.1	± 3.0	kJ/mol	42.0594 ± 0.0016	139597-26-50
Propargylenide		434.4	437.7	± 1.1	kJ/mol	38.0485 ± 0.0024	82906-05-6*0
Sulfur hydroxide oxide		-473.9	-482.9	± 1.7	kJ/mol	97.0715 ± 0.0061	12337-07-4*0
Sulfur hydroxide oxide		-473.2	-482.4	± 2.5	kJ/mol	97.0715 ± 0.0061	12337-07-4*2
Sulfur hydroxide oxide cation		659.1	648.9	± 3.5	kJ/mol	97.0710 ± 0.0061	12337-07-40
Sulfur hydroxide oxide cation		663.6	652.7	± 4.0	kJ/mol	97.0710 ± 0.0061	12337-07-41
1-Aminoethenide		215.9	205.2	± 3.2	kJ/mol	42.0604 ± 0.0016	139597-26-5*0
Hypobromous acid cation		975.16	964.54	± 0.54	kJ/mol	96.9108 ± 0.0010	154804-02-1*0
Sulfurous acid		-506.9	-517.5	± 1.3	kJ/mol	82.0801 ± 0.0061	7782-99-2*1
Sulfurous acid		-497.3	-507.4	± 1.4	kJ/mol	82.0801 ± 0.0061	7782-99-2*3
Carbon		2.390	1.862	± 0.044	kJ/mol	12.01070 ± 0.00080	7440-44-0*501
Hydrogen fluoride			-328.59	± 0.17	kJ/mol	20.006343 ± 0.000070	7664-39-3*855
Hydrogen bromide			-120.82	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*861
Sulfite			-635.3	± 4.0	kJ/mol	80.0653 ± 0.0061	14265-45-3*800
Sulfurous acid			-612.21	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*828
Sulfurous acid			-612.93	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*829
Sulfurous acid			-613.47	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*830
Sulfurous acid			-613.90	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*908
Sulfurous acid			-614.27	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*831
Sulfurous acid			-614.87	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*832
Sulfurous acid			-615.38	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*833
Sulfurous acid			-616.32	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*836
Sulfurous acid			-617.01	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*839
Sulfurous acid			-618.10	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*840
Sulfurous acid			-618.85	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*841
Sulfurous acid			-619.89	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*842
Sulfurous acid			-620.30	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*899
Sulfurous acid			-620.63	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*843
Sulfurous acid			-621.22	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*844
Sulfurous acid			-622.20	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*847
Sulfurous acid			-622.79	± 0.14	kJ/mol	82.0801 ± 0.0061	7782-99-2*850
Sulfonic acid		-482.1	-494.6	± 1.4	kJ/mol	82.0801 ± 0.0061	7782-99-20
Acetic acid			-483.92	± 0.33	kJ/mol	60.0520 ± 0.0017	64-19-7*817
Bisulfite cation		556.0	547.3	± 3.2	kJ/mol	81.0716 ± 0.0061	43637-78-1*0
Chlorine trifluoride anion		-480.4	-481.9	± 3.5	kJ/mol	92.44846 ± 0.00090	184289-50-7*0
Ethane anion		41.8	26.5	± 4.4	kJ/mol	30.0696 ± 0.0017	54064-82-3*0
Formic acid			-424.95	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*924
Platinum atom cation		1427.8	1428.3	± 1.7	kJ/mol	195.0775 ± 0.0020	20561-56-2*0
Platinum atom anion		358.4	358.9	± 1.7	kJ/mol	195.0785 ± 0.0020	40817-31-0*0
Ethylimidogen anion		277.3	263.5	± 3.6	kJ/mol	43.0684 ± 0.0016	82539-33-1*0
Platinum dimer cation		1661.0	1659.7	± 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
Ammonium hydroxide			-366.06	± 0.41	kJ/mol	35.04584 ± 0.00047	1336-21-6*816
Platinum hydride cation		1336.	1355.	± 22.	kJ/mol	196.0854 ± 0.0020	87882-39-1*0
Ethylimidogen cation		1394.6	1381.4	± 3.7	kJ/mol	43.0673 ± 0.0016	82539-33-11
Hydrogen atom		-37.0	-40.2	± 1.1	kJ/mol	1.007940 ± 0.000070	12385-13-6*1001000
Formic acid			-425.16	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*923
Cyanogen chloride anion		46.9	51.2	± 3.1	kJ/mol	61.4707 ± 0.0012	12281-43-5*0
Hydrogen iodide			-56.471	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*839
1-Aziridinylium		1265.6	1253.9	± 3.1	kJ/mol	42.0594 ± 0.0016	91127-35-4*1
Hydrogen atom		-32.	-34.	± 20.	kJ/mol	1.007940 ± 0.000070	12385-13-6*1002000
2-Cyclopropyn-1-ylidene		898.8	905.7	± 1.6	kJ/mol	36.0321 ± 0.0024	102508-15-6*0
Formic acid			-425.44	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*801
Formic acid			-425.54	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*802
1,2-Propadien-1-yl-3-ylidene anion		621.9	629.3	± 1.3	kJ/mol	36.0326 ± 0.0024	109292-47-9*1
Formic acid			-425.51	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*803
Formic acid			-425.47	± 0.60	kJ/mol	46.0254 ± 0.0010	64-18-6*804
Argon cation		1520.571	1520.580	± 0.000	kJ/mol	39.94745 ± 0.00100	14791-69-6*0
Argon dimer cation		1393.760	1391.172	± 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
Helium anion		1868.42	1868.42	± 0.19	kJ/mol	4.0031506 ± 0.0000020	14452-58-5*2
Argon anion		1111.116	1111.116	± 0.099	kJ/mol	39.94855 ± 0.00100	16544-90-4*2
Krypton anion		110.	110.	± 350.	kJ/mol	83.8005 ± 0.1000	20205-93-0*0
Radon cation		1037.07	1037.07	± 0.61	kJ/mol	221.9995 ± 0.1000	22541-65-7*0
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. 1.124 of the Thermochemical Network, Argonne National Laboratory, Lemont, Illinois 2022; available at ATcT.anl.gov [DOI: 10.17038/CSE/1885923]
4		Y. Ren, L. Zhou, A. Mellouki, V. Daële, M. Idir, S. S. Brown, B. Ruscic, Robert S. Paton, M. R. McGillen, and A. R. Ravishankara, Reactions of NO3 with Aromatic Aldehydes: Gas-Phase Kinetics and Insights into the Mechanism of the Reaction. Atmos. Chem. Phys. 21, 13537-13551 (2021) [DOI: 10.5194/acp2021-228]
5		B. Ruscic and D. H. Bross, Active Thermochemical Tables: The Thermophysical and Thermochemical Properties of Methyl, CH3, and Methylene, CH2, Corrected for Nonrigid Rotor and Anharmonic Oscillator Effects. Mol. Phys. e1969046 (2021) [DOI: 10.1080/00268976.2021.1969046]
6		J. H. Thorpe, J. L. Kilburn, D. Feller, P. B. Changala, D. H. Bross, B. Ruscic, and J. F. Stanton, Elaborated Thermochemical Treatment of HF, CO, N2, and H2O: Insight into HEAT and Its Extensions J. Chem. Phys. 155, 184109 (2021) [DOI: 10.1063/5.0069322]
7		T. L. Nguyen, D. H. Bross, B. Ruscic, G. B. Ellison, and J. F. Stanton, Mechanism, Thermochemistry, and Kinetics of the Reversible Reactions: C2H3 + H2 ⇌ C2H4 + H ⇌ C2H5. Faraday Discuss. , (Advance Article) (2022) [DOI: 10.1039/D1FD00124H]
8		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]
9		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 [8,9]).
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.