ATcT [1, 2] enthalpies of formation based on version 1.122v of the Thermochemical Network [3]

Below is a list of 0 K and 298.15 K enthalpies of formation for all 2334 species included in version 1.122v (as of 09/01/2022).
This version of ATcT results was generated from an expansion of version 1.122r [4] to include species relevant to the study of acetone pyrolysis [5].

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		711.406	716.891	± 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		-66.548	-74.517	± 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
Carbon dioxide		-393.110	-393.476	± 0.015	kJ/mol	44.00950 ± 0.00100	124-38-9*0
Ethane		-68.38	-84.01	± 0.13	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
Water		-286.268	-285.796	± 0.025	kJ/mol	18.01528 ± 0.00033	7732-18-5*500
Chlorine atom		119.621	121.302	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*0
Fluorine atom		77.264	79.370	± 0.047	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*0
Ethylene		60.88	52.36	± 0.12	kJ/mol	28.0532 ± 0.0016	74-85-1*0
Propane		-82.72	-105.00	± 0.16	kJ/mol	44.0956 ± 0.0025	74-98-6*0
Methyl		149.874	146.460	± 0.053	kJ/mol	15.03452 ± 0.00083	2229-07-4*0
Methanol		-190.03	-200.91	± 0.15	kJ/mol	32.04186 ± 0.00090	67-56-1*0
Bromine atom		117.915	111.853	± 0.056	kJ/mol	79.90400 ± 0.00100	10097-32-2*0
Formaldehyde		-105.385	-109.226	± 0.096	kJ/mol	30.02598 ± 0.00087	50-00-0*0
Hydroxyl		37.282	37.522	± 0.025	kJ/mol	17.00734 ± 0.00031	3352-57-6*0
Ammonia		-38.563	-45.555	± 0.029	kJ/mol	17.03056 ± 0.00022	7664-41-7*0
Carbon monoxide		-113.804	-110.524	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*0
Ethanol		-217.33	-235.05	± 0.21	kJ/mol	46.0684 ± 0.0017	64-17-5*0
Acetylene		228.85	228.29	± 0.13	kJ/mol	26.0373 ± 0.0016	74-86-2*0
Hydrogen chloride		-91.988	-92.172	± 0.0062	kJ/mol	36.46064 ± 0.00090	7647-01-0*0
Ethyl		131.16	120.08	± 0.25	kJ/mol	29.0611 ± 0.0016	2025-56-1*0
Hydrogen fluoride		-272.668	-272.715	± 0.048	kJ/mol	20.006343 ± 0.000070	7664-39-3*0
Propene		34.84	20.00	± 0.19	kJ/mol	42.0797 ± 0.0024	115-07-1*0
Benzene		100.78	83.27	± 0.22	kJ/mol	78.1118 ± 0.0048	71-43-2*0
Iodine		107.157	106.757	± 0.0021	kJ/mol	126.904470 ± 0.000030	14362-44-8*0
Hydrogen bromide		-27.89	-35.74	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*0
Hydrogen cyanide		129.667	129.282	± 0.088	kJ/mol	27.02538 ± 0.00081	74-90-8*0
Nitric oxide		90.642	91.146	± 0.067	kJ/mol	30.00614 ± 0.00031	10102-43-9*0
Chloromethane		-74.72	-82.65	± 0.16	kJ/mol	50.4872 ± 0.0012	74-87-3*0
Propyne		192.66	185.50	± 0.22	kJ/mol	40.0639 ± 0.0024	74-99-7*0
Acetaldehyde		-155.03	-165.56	± 0.23	kJ/mol	44.0526 ± 0.0017	75-07-0*0
Nitrogen dioxide		36.882	34.074	± 0.067	kJ/mol	46.00554 ± 0.00060	10102-44-0*0
Acetone		-199.99	-216.94	± 0.27	kJ/mol	58.0791 ± 0.0025	67-64-1*0
Hydroxyde		-139.059	-139.026	± 0.025	kJ/mol	17.00789 ± 0.00031	14280-30-9*0
Fluoromethane		-227.43	-235.46	± 0.23	kJ/mol	34.03292 ± 0.00083	593-53-3*0
Dioxidanyl		15.14	12.23	± 0.15	kJ/mol	33.00674 ± 0.00060	3170-83-0*0
Hydrogen iodide		28.643	26.467	± 0.036	kJ/mol	127.912410 ± 0.000076	10034-85-2*0
Methylamine		-6.48	-21.19	± 0.23	kJ/mol	31.05714 ± 0.00088	74-89-5*0
Hydrogen peroxide		-129.411	-135.397	± 0.061	kJ/mol	34.01468 ± 0.00062	7722-84-1*0
n-Butane		-98.31	-125.62	± 0.24	kJ/mol	58.1222 ± 0.0033	106-97-8*0
Toluene		73.35	50.07	± 0.32	kJ/mol	92.1384 ± 0.0056	108-88-3*0
Allene		197.39	189.94	± 0.23	kJ/mol	40.0639 ± 0.0024	463-49-0*0
Methylene		391.058	391.615	± 0.096	kJ/mol	14.02658 ± 0.00081	2465-56-7*1
Vinyl		301.23	297.03	± 0.30	kJ/mol	27.0452 ± 0.0016	2669-89-8*0
Methylene		428.72	429.13	± 0.11	kJ/mol	14.02658 ± 0.00081	2465-56-7*2
Silicon		449.63	453.96	± 0.58	kJ/mol	28.08550 ± 0.00030	7440-21-3*0
Bromomethane		-20.90	-36.30	± 0.16	kJ/mol	94.9385 ± 0.0013	74-83-9*0
1,3-Butadiene		125.55	111.08	± 0.32	kJ/mol	54.0904 ± 0.0032	106-99-0*0
Ozone		144.406	141.743	± 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		28.91	21.54	± 0.27	kJ/mol	31.03392 ± 0.00088	2143-68-2*0
Formic acid		-371.06	-378.38	± 0.22	kJ/mol	46.0254 ± 0.0010	64-18-6*1
Fluoride		-250.901	-249.116	± 0.047	kJ/mol	18.99895178 ± 0.00000050	16984-48-8*0
iso-Butane		-105.87	-134.47	± 0.29	kJ/mol	58.1222 ± 0.0033	75-28-5*0
Hypochlorous acid		-73.835	-76.775	± 0.026	kJ/mol	52.46004 ± 0.00095	7790-92-3*0
Silane		42.00	32.39	± 0.67	kJ/mol	32.11726 ± 0.00041	7803-62-5*0
Dibromine		45.68	30.88	± 0.11	kJ/mol	159.8080 ± 0.0020	7726-95-6*0
Ketene		-45.36	-48.42	± 0.11	kJ/mol	42.0367 ± 0.0016	463-51-4*0
Acetic acid		-418.53	-432.70	± 0.36	kJ/mol	60.0520 ± 0.0017	64-19-7*1
Tetrafluoromethane		-927.61	-933.58	± 0.25	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
Methoxide		-122.48	-130.21	± 0.27	kJ/mol	31.03447 ± 0.00088	3315-60-4*0
Propargyl		354.05	351.46	± 0.32	kJ/mol	39.0559 ± 0.0024	2932-78-7*0
Formyl		41.385	41.759	± 0.096	kJ/mol	29.01804 ± 0.00086	2597-44-6*0
Hydroxymethyl		-10.39	-16.69	± 0.27	kJ/mol	31.03392 ± 0.00088	2597-43-5*0
Chloroethane		-96.95	-111.53	± 0.25	kJ/mol	64.5138 ± 0.0019	75-00-3*0
Phenyl		350.81	337.45	± 0.51	kJ/mol	77.1039 ± 0.0048	2396-01-2*0
Methylidyne		592.838	596.172	± 0.097	kJ/mol	13.01864 ± 0.00080	3315-37-5*0
Nitrilomethyl		436.77	440.05	± 0.14	kJ/mol	26.01744 ± 0.00080	2074-87-5*0
Fluoroform		-689.17	-696.12	± 0.39	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		-464.84	-467.64	± 0.44	kJ/mol	69.00591 ± 0.00080	2264-21-3*0
Ethylium		914.88	902.81	± 0.30	kJ/mol	29.0606 ± 0.0016	14936-94-8*0
Allyl		179.98	168.25	± 0.40	kJ/mol	41.0718 ± 0.0024	1981-80-2*0
Phenol		-74.70	-93.30	± 0.63	kJ/mol	94.1112 ± 0.0048	108-95-2*0
Tetrachloromethane		-89.32	-91.49	± 0.41	kJ/mol	153.8215 ± 0.0037	56-23-5*0
Bromide		-206.622	-212.684	± 0.056	kJ/mol	79.90455 ± 0.00100	24959-67-9*0
Oxomethylium		827.761	827.176	± 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
Amidogen		188.93	186.04	± 0.11	kJ/mol	16.02262 ± 0.00016	13770-40-6*0
Ethenol		-113.37	-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		-19.78	-37.57	± 0.77	kJ/mol	106.1219 ± 0.0056	100-52-7*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		-114.89	-127.71	± 0.47	kJ/mol	48.0413 ± 0.0010	3031-73-0*0
Acetyl		-3.45	-10.01	± 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
Hydroxyformyl		-181.19	-184.16	± 0.42	kJ/mol	45.0174 ± 0.0010	2564-86-5*1
Vinyl chloride		29.37	21.79	± 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
iso-Propyl		105.52	88.65	± 0.45	kJ/mol	43.0877 ± 0.0024	2025-55-0*0
Dioxymethyl	$[O-]\[O+]=C$	111.94	104.94	± 0.62	kJ/mol	46.0254 ± 0.0010	56077-92-0*0
Cyanoacetylene		372.12	373.87	± 0.62	kJ/mol	51.0468 ± 0.0024	1070-71-9*0
Vinylacetylene		296.25	289.49	± 0.56	kJ/mol	52.0746 ± 0.0032	689-97-4*0
Sulfur dioxide		-294.13	-296.68	± 0.18	kJ/mol	64.0648 ± 0.0060	7446-09-5*0
Methanimine		96.45	88.54	± 0.37	kJ/mol	29.04126 ± 0.00083	2053-29-4*0
Nitric acid		-124.44	-134.15	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*0
Ethoxide		-163.90	-178.84	± 0.44	kJ/mol	45.0610 ± 0.0017	16331-64-9*0
n-Propyl		118.35	100.94	± 0.48	kJ/mol	43.0877 ± 0.0024	2143-61-5*0
Methoxymethane		-166.51	-184.01	± 0.37	kJ/mol	46.0684 ± 0.0017	115-10-6*0
Methylium		1099.348	1095.404	± 0.049	kJ/mol	15.03397 ± 0.00083	14531-53-4*0
Hydrogen chloride			-166.449	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*834
Methylperoxy		22.49	13.04	± 0.38	kJ/mol	47.0333 ± 0.0010	2143-58-0*0
1-Hydroxyethyl		-42.89	-56.32	± 0.47	kJ/mol	45.0605 ± 0.0017	2348-46-1*1
Isocyanic acid		-115.96	-118.95	± 0.28	kJ/mol	43.02478 ± 0.00086	75-13-8*0
Difluorophosgene		-603.32	-606.42	± 0.41	kJ/mol	66.00691 ± 0.00085	353-50-4*0
Hypofluorous acid		-84.36	-87.26	± 0.19	kJ/mol	36.00574 ± 0.00031	14034-79-8*0
Iodomethane		24.38	14.85	± 0.18	kJ/mol	141.93899 ± 0.00083	74-88-4*0
Dichloromethane		-86.89	-93.75	± 0.33	kJ/mol	84.9320 ± 0.0020	75-09-2*0
1,3-Butadiyne		458.34	460.06	± 0.58	kJ/mol	50.0587 ± 0.0032	460-12-8*0
Chlorobenzene		67.22	52.26	± 0.61	kJ/mol	112.5566 ± 0.0049	108-90-7*0
Ethynyl		563.89	568.00	± 0.14	kJ/mol	25.0293 ± 0.0016	2122-48-7*0
Ethynide		277.44	280.85	± 0.18	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
Trihydrogen cation		1110.304	1106.696	± 0.013	kJ/mol	3.02327 ± 0.00021	28132-48-1*0
Oxygen atom anion		105.868	108.097	± 0.0021	kJ/mol	15.99995 ± 0.00030	14337-01-0*0
Cyanogen chloride		135.18	135.87	± 0.46	kJ/mol	61.4701 ± 0.0012	506-77-4*0
Isocyanomethane		183.83	177.29	± 0.48	kJ/mol	41.0520 ± 0.0016	593-75-9*0
2-Hydroxyethyl		-13.11	-26.37	± 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
Dimethylamine		4.20	-17.44	± 0.41	kJ/mol	45.0837 ± 0.0017	124-40-3*0
Ammonium		643.01	631.69	± 0.20	kJ/mol	18.03795 ± 0.00029	14798-03-9*0
2-Butyne		159.42	146.46	± 0.46	kJ/mol	54.0904 ± 0.0032	503-17-3*0
Cyclopropene		292.35	283.63	± 0.45	kJ/mol	40.0639 ± 0.0024	2781-85-3*0
Cyclopentadiene		151.41	134.29	± 0.61	kJ/mol	66.1011 ± 0.0040	542-92-7*0
Difluoromethane		-443.18	-450.80	± 0.33	kJ/mol	52.02339 ± 0.00081	75-10-5*0
Oxygen difluoride		26.84	24.59	± 0.24	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
Hydride		143.264	145.228	± 0.000	kJ/mol	1.008489 ± 0.000070	12184-88-2*0
Nitrosyl hydride		109.95	106.98	± 0.11	kJ/mol	31.01408 ± 0.00032	14332-28-6*0
Cyclopropane		71.01	53.89	± 0.38	kJ/mol	42.0797 ± 0.0024	75-19-4*0
Propynylidene		543.50	546.49	± 0.65	kJ/mol	38.0480 ± 0.0024	67152-18-5*1
Isobutene		4.18	-16.88	± 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		1.23	-12.67	± 0.43	kJ/mol	45.0605 ± 0.0017	2154-50-9*51
Phosgene		-217.49	-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		-94.62	-99.52	± 0.39	kJ/mol	119.3767 ± 0.0028	67-66-3*0
Tetrafluoroethylene		-670.68	-674.09	± 0.50	kJ/mol	100.0150 ± 0.0016	116-14-3*0
Fluoromethylidyne		243.14	246.74	± 0.12	kJ/mol	31.00910 ± 0.00080	3889-75-6*0
Acrylonitrile		193.79	187.03	± 0.66	kJ/mol	53.0627 ± 0.0024	107-13-1*1
Silanol		-271.9	-283.5	± 1.3	kJ/mol	48.11666 ± 0.00051	14475-38-8*0
Sulfur trioxide		-389.73	-395.47	± 0.28	kJ/mol	80.0642 ± 0.0061	7446-11-9*0
Oxygen atom cation		1560.786	1562.643	± 0.0021	kJ/mol	15.99885 ± 0.00030	14581-93-2*0
Nitrous acid		-72.965	-79.109	± 0.080	kJ/mol	47.01348 ± 0.00061	7782-77-6*1
1,2-Propadiene-1,3-diylidene		814.63	823.58	± 0.54	kJ/mol	36.0321 ± 0.0024	12075-35-3*0
Oxirane		-39.97	-52.51	± 0.36	kJ/mol	44.0526 ± 0.0017	75-21-8*0
Vinyl anion		237.07	232.65	± 0.68	kJ/mol	27.0458 ± 0.0016	25012-81-1*0
Cyanide		63.962	67.248	± 0.093	kJ/mol	26.01799 ± 0.00080	57-12-5*0
Cyanogen bromide		186.6	180.0	± 1.4	kJ/mol	105.9214 ± 0.0013	506-68-3*0
1-Butene		21.16	0.21	± 0.35	kJ/mol	56.1063 ± 0.0032	106-98-9*0
Formate		-463.20	-466.84	± 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		-41.34	-63.29	± 0.25	kJ/mol	108.9651 ± 0.0019	74-96-4*0
Vinyl bromide		88.69	73.88	± 0.56	kJ/mol	106.9492 ± 0.0019	593-60-2*0
Benzoyl		138.2	124.7	± 1.1	kJ/mol	105.1140 ± 0.0056	2652-65-5*0
Methyl nitrite		-55.55	-67.34	± 0.45	kJ/mol	61.0401 ± 0.0010	624-91-9*2
Silyl		204.00	198.52	± 0.90	kJ/mol	31.10932 ± 0.00037	13765-44-1*0
Chlorine fluoride		-55.611	-55.706	± 0.053	kJ/mol	54.45110 ± 0.00090	7790-89-8*0
Diazynium		1042.53	1038.92	± 0.68	kJ/mol	29.02087 ± 0.00016	12357-66-3*0
Nitrite		-182.61	-185.41	± 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
n-Butyl		102.96	80.45	± 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		142.9	113.2	± 1.1	kJ/mol	331.6267 ± 0.0041	558-13-4*0
Vinyl fluoride		-134.52	-142.33	± 0.45	kJ/mol	46.0436 ± 0.0016	75-02-5*0
Phenylium		1148.66	1135.88	± 0.85	kJ/mol	77.1034 ± 0.0048	17333-73-2*0
Fluorooxidanyl		110.29	110.91	± 0.15	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
Methanium		921.97	911.72	± 0.44	kJ/mol	17.04985 ± 0.00087	15135-49-6*0
Ethylidene		361.26	354.26	± 0.49	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		8.61	8.94	± 0.71	kJ/mol	45.01584 ± 0.00080	1495-50-7*0
n-Pentane		-114.16	-146.04	± 0.30	kJ/mol	72.1488 ± 0.0041	109-66-0*0
Formic acid		-354.73	-361.83	± 0.38	kJ/mol	46.0254 ± 0.0010	64-18-6*2
Cyanooxidanyl		126.94	127.42	± 0.33	kJ/mol	42.01684 ± 0.00086	22400-26-6*0
Methanetetraylbisamidogen		451.24	451.65	± 0.44	kJ/mol	40.02418 ± 0.00081	2669-76-3*0
Fluoroethane		-257.20	-272.07	± 0.36	kJ/mol	48.0595 ± 0.0016	353-36-6*0
Chlorotrifluoromethane		-704.25	-709.36	± 0.57	kJ/mol	104.4586 ± 0.0012	75-72-9*0
Phenide		244.57	231.15	± 0.38	kJ/mol	77.1044 ± 0.0048	30922-78-2*0
Fluorobenzene		-98.98	-114.66	± 0.89	kJ/mol	96.1023 ± 0.0048	462-06-6*0
Nitromethane		-60.77	-74.67	± 0.46	kJ/mol	61.0401 ± 0.0010	75-52-5*0
Pyridine		157.37	140.56	± 0.40	kJ/mol	79.0999 ± 0.0040	110-86-1*0
Acrylonitrile		193.79	187.03	± 0.66	kJ/mol	53.0627 ± 0.0024	107-13-1*0
1,2,3-Butatrien-1-yl		497.43	497.45	± 0.69	kJ/mol	51.0666 ± 0.0032	22112-56-7*0
Disilane		90.7	74.6	± 1.4	kJ/mol	62.21864 ± 0.00073	1590-87-0*0
2,4-Hexadiyne		380.24	370.21	± 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		820.23	828.70	± 0.23	kJ/mol	24.0214 ± 0.0016	12070-15-4*0
Methylidyne		664.60	667.94	± 0.54	kJ/mol	13.01864 ± 0.00080	3315-37-5*2
Ethanide		155.42	144.34	± 0.87	kJ/mol	29.0616 ± 0.0016	25013-41-6*0
Vinylium		1119.06	1115.62	± 0.55	kJ/mol	27.0447 ± 0.0016	14604-48-9*0
Aminomethyl		159.32	149.48	± 0.37	kJ/mol	30.04920 ± 0.00085	10507-29-6*0
Hydroxymethylium		717.68	709.74	± 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		-279.21	-288.56	± 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		9.47	-11.09	± 0.37	kJ/mol	56.1063 ± 0.0032	624-64-6*0
Cyclopentane		-43.69	-76.26	± 0.41	kJ/mol	70.1329 ± 0.0041	287-92-3*0
Propionaldehyde		-171.22	-186.63	± 0.24	kJ/mol	58.0791 ± 0.0025	123-38-6*0
Phenolate		-146.51	-161.98	± 0.84	kJ/mol	93.1038 ± 0.0048	3229-70-7*0
Bromotrifluoromethane		-638.65	-650.76	± 0.41	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		274.92	261.80	± 0.91	kJ/mol	65.0932 ± 0.0040	2143-53-5*0
Carbamoyl		-7.77	-14.18	± 0.74	kJ/mol	44.03272 ± 0.00087	2858-51-7*0
Tetrahedrane		547.70	539.29	± 0.91	kJ/mol	52.0746 ± 0.0032	157-39-1*0
Silylene		270.68	269.01	± 0.86	kJ/mol	30.10138 ± 0.00033	13825-90-6*2
Ethylamine		-28.21	-49.98	± 0.53	kJ/mol	45.0837 ± 0.0017	75-04-7*0
Hydrogen sulfide		-17.35	-20.27	± 0.21	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
Azanide		114.81	111.94	± 0.29	kJ/mol	16.02317 ± 0.00016	17655-31-1*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		373.52	366.29	± 0.65	kJ/mol	28.0532 ± 0.0016	4218-50-2*2
Cyanogen		308.18	310.13	± 0.41	kJ/mol	52.0349 ± 0.0016	460-19-5*0
1-Methylethenyl		262.98	252.58	± 0.62	kJ/mol	41.0718 ± 0.0024	15552-77-9*0
neo-Pentane		-134.22	-167.10	± 0.38	kJ/mol	72.1488 ± 0.0041	463-82-1*0
Hydrogen fluoride			-334.51	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*800
Trimethylamine		2.25	-26.60	± 0.76	kJ/mol	59.1103 ± 0.0025	75-50-3*0
Dichloromethylene		229.89	231.07	± 0.64	kJ/mol	82.9161 ± 0.0020	1605-72-7*2
Trifluoromethylium		409.79	406.58	± 0.43	kJ/mol	69.00536 ± 0.00080	18851-76-8*0
Trioxidane		-81.95	-90.79	± 0.62	kJ/mol	50.01408 ± 0.00091	14699-99-1*1
Ethyl nitrite		-81.37	-100.10	± 0.88	kJ/mol	75.0666 ± 0.0017	109-95-5*1
Hypobromite		-96.04	-103.52	± 0.54	kJ/mol	95.9039 ± 0.0010	14380-62-2*0
Dioxidanide		-88.85	-91.52	± 0.35	kJ/mol	33.00729 ± 0.00060	14691-59-9*0
Azido radical		452.24	449.66	± 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		600.66	597.58	± 0.44	kJ/mol	45.0169 ± 0.0010	638-71-1*0
Hydroxyamidogen		101.26	94.43	± 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		411.22	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
Chloroacetylene		229.30	230.16	± 0.45	kJ/mol	60.4820 ± 0.0018	593-63-5*0
Fluoroacetylene		104.98	105.69	± 0.40	kJ/mol	44.0277 ± 0.0016	2713-09-9*0
Peroxyformyl		-100.35	-105.65	± 0.92	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
Water			-285.796	± 0.025	kJ/mol	18.01528 ± 0.00033	7732-18-5*590
Ketenyl		177.08	178.17	± 0.54	kJ/mol	41.0287 ± 0.0016	51095-15-9*0
Formic acid		-371.06	-378.36	± 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		-207.78	-213.41	± 0.57	kJ/mol	58.0361 ± 0.0017	107-22-2*1
Trichloromethyl		73.79	73.32	± 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		126.8	104.7	± 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		436.65	428.20	± 0.69	kJ/mol	52.0746 ± 0.0032	1120-53-2*0
Difluorodioxidane		35.35	31.62	± 0.41	kJ/mol	69.99561 ± 0.00060	7783-44-0*0
Silanone		-94.5	-99.8	± 1.1	kJ/mol	46.10078 ± 0.00045	22755-01-7*0
Silyloxy		7.7	-0.3	± 1.5	kJ/mol	47.10872 ± 0.00047	81429-20-1*0
Sulfur		276.89	279.14	± 0.18	kJ/mol	32.0660 ± 0.0060	7704-34-9*0
Hypofluorite		-108.83	-108.66	± 0.48	kJ/mol	34.99835 ± 0.00030	12763-66-5*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
Methylamidogen		187.71	177.06	± 0.45	kJ/mol	30.04920 ± 0.00085	15622-51-2*0
Cyanogen iodide		222.6	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	± 0.78	kJ/mol	44.0526 ± 0.0017	30967-49-8*21
Dicarbon monoxide		377.13	381.17	± 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
Fluorodioxidanyl		26.90	25.19	± 0.26	kJ/mol	50.99720 ± 0.00060	15499-23-7*0
N-Methylenemethanamine		94.54	79.62	± 0.70	kJ/mol	43.0678 ± 0.0016	1761-67-7*0
Chloromethylene		320.37	320.65	± 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		-343.46	-350.52	± 0.77	kJ/mol	64.0341 ± 0.0016	75-38-7*0
Phenylacetylene		332.89	317.73	± 0.72	kJ/mol	102.1332 ± 0.0064	536-74-3*0
o-Tolualdehyde		-44.7	-67.0	± 1.1	kJ/mol	120.1485 ± 0.0064	529-20-4*0
Acetonyl		-18.50	-32.10	± 0.69	kJ/mol	57.0712 ± 0.0024	3122-07-4*0
3-Buten-2-one		-95.40	-111.65	± 0.85	kJ/mol	70.0898 ± 0.0032	78-94-4*1
Urea		-218.17	-234.57	± 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
Disilanyl		241.1	229.0	± 1.6	kJ/mol	61.21070 ± 0.00069	73151-72-1*0
Disilene		287.1	278.5	± 1.9	kJ/mol	60.20276 ± 0.00066	15435-77-5*2
1,3-Hexadiyne		405.15	393.46	± 0.98	kJ/mol	78.1118 ± 0.0048	4447-21-6*0
(E)-1-Methylallyl		152.58	135.27	± 0.80	kJ/mol	55.0984 ± 0.0032	17787-86-9*0
Iodine monochloride		19.024	17.391	± 0.013	kJ/mol	162.35717 ± 0.00090	7790-99-0*0
Iodotrifluoromethane		-583.22	-589.11	± 0.46	kJ/mol	195.91038 ± 0.00080	2314-97-8*0
Trinitrogen cation		1519.41	1516.78	± 0.89	kJ/mol	42.01967 ± 0.00021	12185-03-4*0
Oxonitrate anion		88.12	88.15	± 0.25	kJ/mol	30.00669 ± 0.00031	14967-78-3*0
Nitrosyl ion		984.510	984.505	± 0.067	kJ/mol	30.00559 ± 0.00031	14452-93-8*0
Nitrogen sesquioxide		90.77	86.20	± 0.15	kJ/mol	76.01168 ± 0.00091	10544-73-7*0
Ozonide		-58.47	-60.83	± 0.21	kJ/mol	47.99875 ± 0.00090	12596-80-4*0
Methylene anion		328.17	328.60	± 0.18	kJ/mol	14.02713 ± 0.00081	50928-07-9*0
Methylidyne anion		475.75	479.08	± 0.22	kJ/mol	13.01919 ± 0.00080	28604-54-8*0
Ethanium		874.32	858.06	± 0.62	kJ/mol	31.0764 ± 0.0017	24669-33-8*1
Hydrogen bromide			-120.88	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*800
Chlorine trifluoride		-158.54	-162.64	± 0.87	kJ/mol	92.44791 ± 0.00090	7790-91-2*0
Hydrogen isocyanide		192.04	192.43	± 0.33	kJ/mol	27.02538 ± 0.00081	6914-07-4*0
Chloronium		881.5	878.4	± 1.1	kJ/mol	37.46803 ± 0.00091	36658-55-6*0
iso-Propylium		822.95	805.87	± 0.23	kJ/mol	43.0871 ± 0.0024	19252-53-0*0
Carbonic acid		-602.70	-612.87	± 0.75	kJ/mol	62.0248 ± 0.0012	463-79-6*1
Peroxyformate		-340.89	-346.35	± 0.95	kJ/mol	61.0174 ± 0.0012	104960-05-6*1
Cyclobutane		52.34	27.80	± 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
Dioxygen anion		-43.36	-42.72	± 0.17	kJ/mol	31.99935 ± 0.00060	11062-77-4*0
1-Hydroxyethylium		608.73	594.30	± 0.38	kJ/mol	45.0600 ± 0.0017	18682-96-7*1
Vinoxy		23.11	16.31	± 0.59	kJ/mol	43.0446 ± 0.0016	6912-06-7*0
Ethynol		95.29	92.80	± 0.78	kJ/mol	42.0367 ± 0.0016	32038-79-2*2
Formyloxidanyl		-125.86	-127.52	± 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
1,1,1-Trichloroethane		-133.99	-144.56	± 0.51	kJ/mol	133.4033 ± 0.0031	71-55-6*0
Tetrachloroethene		-20.54	-21.41	± 0.99	kJ/mol	165.8322 ± 0.0039	127-18-4*0
Chlorodifluoromethane		-475.56	-481.75	± 0.99	kJ/mol	86.4681 ± 0.0012	75-45-6*0
Fluoromethylene		148.41	148.69	± 0.43	kJ/mol	32.01704 ± 0.00080	13453-52-6*2
Fluoroformyl		-176.61	-176.02	± 0.37	kJ/mol	47.00850 ± 0.00085	1871-24-5*0
2-Bromoethanol		-196.35	-220.41	± 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		230.22	211.40	± 0.55	kJ/mol	91.1305 ± 0.0056	2154-56-5*0
Phenoxy		70.95	55.66	± 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		132.14	130.50	± 0.72	kJ/mol	54.0474 ± 0.0024	61244-93-7*0
2-Propynal		135.37	133.21	± 0.91	kJ/mol	54.0474 ± 0.0024	624-67-9*0
1-Cyanovinyl		419.0	418.9	± 1.1	kJ/mol	52.0547 ± 0.0024	15091-87-9*0
Cyanomethylene		479.9	483.2	± 1.1	kJ/mol	39.0361 ± 0.0016	2612-62-6*1
3-Methylenecyclopropene		395.97	388.04	± 0.83	kJ/mol	52.0746 ± 0.0032	4095-06-1*0
Phenylperoxy		153.2	136.2	± 1.4	kJ/mol	109.1027 ± 0.0049	91422-02-5*0
Trimethylsilane		-125.5	-151.6	± 1.6	kJ/mol	74.1970 ± 0.0025	993-07-7*0
1-Methyl-1-propenyl		239.99	223.81	± 0.67	kJ/mol	55.0984 ± 0.0032	71790-71-1*1
1-Butenyl		263.40	246.06	± 0.69	kJ/mol	55.0984 ± 0.0032	2669-61-6*2
Methanide		141.11	137.67	± 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		640.7	636.2	± 1.1	kJ/mol	27.0452 ± 0.0016	67624-57-1*2
Aminomethylium		764.03	752.06	± 0.64	kJ/mol	30.04865 ± 0.00085	488821-23-4*0
Isocyanomethanide		254.06	251.02	± 0.95	kJ/mol	40.0446 ± 0.0016	81704-80-5*0
Hydrogen chloride			-166.989	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*800
n-Propylium		856.78	838.50	± 0.80	kJ/mol	43.0871 ± 0.0024	19252-52-9*0
1-Methylethylidene		315.98	302.08	± 0.99	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
Cyclobutene		178.01	160.96	± 0.61	kJ/mol	54.0904 ± 0.0032	822-35-5*0
1,3-Butadienyl		372.23	361.74	± 0.87	kJ/mol	53.0825 ± 0.0032	86181-68-2*11
Trioxidanide		-120.0	-123.1	± 1.6	kJ/mol	49.00669 ± 0.00090	89965-38-8*2
Cyclohexane		-83.20	-122.77	± 0.29	kJ/mol	84.1595 ± 0.0049	110-82-7*0
Protonated oxirane		725.42	709.25	± 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		170.72	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		-232.56	-241.55	± 0.33	kJ/mol	78.4973 ± 0.0019	75-36-5*0
Dioxoethyl		-63.13	-64.55	± 0.87	kJ/mol	57.0281 ± 0.0017	702699-38-5*0
(Methylamino)methyl		168.29	151.84	± 0.81	kJ/mol	44.0758 ± 0.0017	31277-24-4*0
Hydrogen peroxide cation		897.29	890.31	± 0.51	kJ/mol	34.01413 ± 0.00062	12325-10-9*1
Chlorine atom cation		1370.807	1372.603	± 0.0021	kJ/mol	35.45215 ± 0.00090	24203-47-2*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		-488.88	-493.06	± 0.45	kJ/mol	120.9129 ± 0.0020	75-71-8*0
Fluorodichloromethane		-277.64	-283.09	± 0.90	kJ/mol	102.9224 ± 0.0020	75-43-4*0
Difluoromethylene		-193.85	-193.37	± 0.36	kJ/mol	50.00751 ± 0.00080	2154-59-8*2
Fluoromethylene		210.38	210.72	± 0.66	kJ/mol	32.01704 ± 0.00080	13453-52-6*1
Formyl fluoride		-378.62	-382.21	± 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		109.7	91.3	± 1.4	kJ/mol	119.1406 ± 0.0064	104680-89-9*0
1-Propen-2-ol-1-yl		101.56	89.33	± 0.87	kJ/mol	57.0712 ± 0.0024	1976041-84-5*11
Propyl nitrite		-96.0	-120.9	± 1.8	kJ/mol	89.0932 ± 0.0025	543-67-9*1
2-Cyanovinyl		448.0	445.5	± 1.2	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	544.60	± 0.87	kJ/mol	51.0666 ± 0.0032	2810-61-9*1
3-Buten-1-ynyl		628.5	626.4	± 1.0	kJ/mol	51.0666 ± 0.0032	108179-98-2*0
Hydroxysilyl		-105.0	-112.9	± 1.5	kJ/mol	47.10872 ± 0.00047	113648-09-2*0
Trimethylsilanol		-465.4	-491.7	± 1.9	kJ/mol	90.1964 ± 0.0025	1066-40-6*0
2-Propanamine		-56.66	-83.46	± 0.53	kJ/mol	59.1103 ± 0.0025	75-31-0*0
Sulfur monoxide		6.02	6.06	± 0.18	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	936.925	± 0.017	kJ/mol	44.00895 ± 0.00100	12181-61-2*0
Chloro hypochlorite		79.79	77.98	± 0.36	kJ/mol	86.9048 ± 0.0018	7791-21-1*0
Ammonium			-133.070	± 0.056	kJ/mol	18.03795 ± 0.00029	14798-03-9*800
Hydrazino		234.77	224.25	± 0.69	kJ/mol	31.03730 ± 0.00025	13598-46-4*0
Carbon anion		589.630	594.776	± 0.044	kJ/mol	12.01125 ± 0.00080	14337-00-9*0
Methyleneamidogen		242.01	238.35	± 0.58	kJ/mol	28.03332 ± 0.00082	15845-29-1*0
(E)-Iminomethyl		275.80	272.18	± 0.61	kJ/mol	28.03332 ± 0.00082	54980-10-8*0
Chlorooxy hypochlorite		134.58	131.34	± 0.56	kJ/mol	102.9042 ± 0.0019	12292-23-8*0
Hydrogen isocyanide cation		1351.51	1351.47	± 0.84	kJ/mol	27.02483 ± 0.00081	74158-11-5*0
Methyloxonium		589.1	574.9	± 1.1	kJ/mol	33.04925 ± 0.00092	17836-08-7*0
n-Propylide		123.1	105.4	± 1.2	kJ/mol	43.0882 ± 0.0024	59513-13-2*0
Hydroperoxonium		738.2	727.9	± 1.2	kJ/mol	35.02207 ± 0.00064	70850-26-9*1
Propargylenide		434.5	437.0	± 1.1	kJ/mol	38.0485 ± 0.0024	82906-05-6*1
Chlorine pentafluoride		-225.9	-234.0	± 1.3	kJ/mol	130.44472 ± 0.00090	13637-63-3*0
t-Butyl		75.32	50.03	± 0.76	kJ/mol	57.1143 ± 0.0033	1605-73-8*0
2-Butyn-1-yl anion		253.7	244.8	± 1.1	kJ/mol	53.0830 ± 0.0032	65114-66-1*0
Peroxyhypochlorous acid		3.98	-1.29	± 0.95	kJ/mol	68.4594 ± 0.0011	67952-07-2*0
Ethoxy		5.50	-8.94	± 0.43	kJ/mol	45.0605 ± 0.0017	2154-50-9*52
Ethenol		-108.95	-119.66	± 0.50	kJ/mol	44.0526 ± 0.0017	557-75-5*2
Oxiranyl		172.87	164.58	± 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	-382.17	± 0.94	kJ/mol	48.0413 ± 0.0010	463-57-0*2
Dioxirane		9.40	1.73	± 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		-226.9	-236.8	± 1.1	kJ/mol	59.0440 ± 0.0017	2887-46-9*1
Dimethylamidogen		174.1	156.8	± 1.4	kJ/mol	44.0758 ± 0.0017	15337-44-7*0
Dichloride		-229.8	-228.7	± 1.4	kJ/mol	70.9059 ± 0.0018	12595-89-0*0
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
Fluorotrichloromethane		-283.25	-286.40	± 0.76	kJ/mol	137.3672 ± 0.0028	75-69-4*0
Hexafluoroethane		-1333.96	-1342.26	± 0.84	kJ/mol	138.0118 ± 0.0016	76-16-4*0
Formyl chloride		-179.87	-183.07	± 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
o-Benzyne		468.20	459.29	± 0.86	kJ/mol	76.0960 ± 0.0048	462-80-6*2
Tropyl		296.4	278.9	± 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		177.93	161.94	± 0.99	kJ/mol	204.0084 ± 0.0048	591-50-4*0
1-Hydroxy-1-methylethyl		-78.30	-96.55	± 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		285.16	278.66	± 0.94	kJ/mol	53.0627 ± 0.0024	14668-82-7*0
1-Isocyanoethylidene		527.9	523.1	± 1.1	kJ/mol	53.0627 ± 0.0024	498544-34-62
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		-98.83	-97.67	± 0.64	kJ/mol	44.08490 ± 0.00042	10097-28-6*0
Silyloxy anion		-312.6	-321.9	± 1.6	kJ/mol	47.10927 ± 0.00047	43336-62-5*0
Cyclobutyl		246.52	227.61	± 0.73	kJ/mol	55.0984 ± 0.0032	4548-06-5*0
1-Propanamine		-42.22	-69.96	± 0.42	kJ/mol	59.1103 ± 0.0025	107-10-8*0
Disulfur		127.49	127.80	± 0.36	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		-511.15	-521.36	± 0.90	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			-206.58	± 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		1092.48	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		7.83	0.75	± 0.41	kJ/mol	63.01288 ± 0.00091	14691-52-2*1
Carbon cation		1797.859	1803.457	± 0.044	kJ/mol	12.01015 ± 0.00080	14067-05-1*0
Bromanylium		1257.776	1251.713	± 0.056	kJ/mol	79.90345 ± 0.00100	22541-56-6*0
Fluoronium		774.05	771.11	± 0.91	kJ/mol	21.01373 ± 0.00014	12206-67-6*2
Oxoniumyl ion		978.500	975.597	± 0.026	kJ/mol	18.01473 ± 0.00033	56583-62-1*0
Ethylidyne		508.56	504.86	± 0.80	kJ/mol	27.0452 ± 0.0016	67624-57-1*0
Trioxidane		-72.68	-81.17	± 0.82	kJ/mol	50.01408 ± 0.00091	14699-99-1*2
Ethynylium		1687.60	1690.94	± 0.16	kJ/mol	25.0288 ± 0.0016	16456-59-0*0
Methylamidogen anion		145.40	134.58	± 0.64	kJ/mol	30.04975 ± 0.00085	54448-39-4*0
Methylimidogen		323.1	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		-89.79	-99.93	± 0.58	kJ/mol	47.0339 ± 0.0010	35683-44-4*0
Propylidyne		492.5	482.8	± 1.2	kJ/mol	41.0718 ± 0.0024	85056-54-8*1
Cyclopropylidene		474.92	466.90	± 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	439.4	± 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		327.12	317.12	± 0.75	kJ/mol	53.0825 ± 0.0032	1204515-52-5*0
Cyclopentene		59.59	35.33	± 0.46	kJ/mol	68.1170 ± 0.0040	142-29-0*0
n-Heptane		-145.36	-187.24	± 0.46	kJ/mol	100.2019 ± 0.0057	142-82-5*0
n-Octane		-160.99	-207.82	± 0.54	kJ/mol	114.2285 ± 0.0065	111-65-9*0
Difluoride		-291.0	-290.2	± 1.5	kJ/mol	37.9973550 ± 0.0000010	12184-85-9*0
Methoxymethyl		13.18	0.62	± 0.91	kJ/mol	45.0605 ± 0.0017	16520-04-0*0
Water dimer		-491.017	-499.056	± 0.049	kJ/mol	36.03056 ± 0.00066	25655-83-8*0
Oxoethanide		-43.8	-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	-177.37	± 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		-223.73	-251.15	± 0.60	kJ/mol	74.1216 ± 0.0033	60-29-7*0
Ethyl formate		-375.1	-393.9	± 1.0	kJ/mol	74.0785 ± 0.0025	109-94-4*1
Propionic acid		-435.93	-453.83	± 0.59	kJ/mol	74.0785 ± 0.0025	79-09-4*1
Acetate		-496.07	-505.20	± 0.85	kJ/mol	59.0446 ± 0.0017	71-50-1*0
(1E)-Ethanimine	$C\C=N\[H]$	55.81	39.60	± 0.79	kJ/mol	43.0678 ± 0.0016	56003-81-7*0
Ethenamine		69.12	54.56	± 0.75	kJ/mol	43.0678 ± 0.0016	593-67-9*0
(Dimethylamino)methyl		166.1	143.0	± 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	-146.5	± 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
2-Hydrotrioxy		299.6	293.9	± 1.2	kJ/mol	49.00614 ± 0.00090	12500-78-60
Difluoromethylene		-193.85	-193.37	± 0.36	kJ/mol	50.00751 ± 0.00080	2154-59-8*0
1,1-Difluoroethane		-488.94	-502.66	± 0.54	kJ/mol	66.0500 ± 0.0016	75-37-6*0
Chloric acid		0.6	-6.5	± 1.1	kJ/mol	84.4588 ± 0.0013	7790-93-4*0
2-Fluoroethanol		-405.70	-422.94	± 0.99	kJ/mol	64.0589 ± 0.0017	371-62-0*0
Benzylide		142.00	123.09	± 0.41	kJ/mol	91.1310 ± 0.0056	18860-15-6*0
Cycloheptatriene		207.46	184.03	± 0.94	kJ/mol	92.1384 ± 0.0056	544-25-2*0
Ethylbenzene		58.37	29.91	± 0.54	kJ/mol	106.1650 ± 0.0064	100-41-4*0
Phenylethene		169.83	148.49	± 0.54	kJ/mol	104.1491 ± 0.0064	100-42-5*0
Benzonitrile		230.05	215.86	± 0.93	kJ/mol	103.1213 ± 0.0056	100-47-0*0
p-Toluoyl		107.7	89.1	± 1.5	kJ/mol	119.1406 ± 0.0064	67958-03-6*0
Acetonate		-187.59	-201.14	± 0.92	kJ/mol	57.0717 ± 0.0024	24262-31-5*0
Methyl nitrite		-55.55	-66.22	± 0.45	kJ/mol	61.0401 ± 0.0010	624-91-9*0
Perchloryl		191.76	186.09	± 0.62	kJ/mol	83.4509 ± 0.0013	13932-10-0*0
3-Oxo-1,2-propadien-1-yl		290.3	292.8	± 1.0	kJ/mol	53.0394 ± 0.0024	1198096-74-0*0
Chlorate		-208.2	-213.7	± 1.5	kJ/mol	83.4514 ± 0.0013	14866-68-3*0
1-Cyanoethylidene		475.6	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	± 1.3	kJ/mol	52.0553 ± 0.0024	36259-97-9*0
2-Cyanovinyl		448.0	445.5	± 1.1	kJ/mol	52.0547 ± 0.0024	189141-20-6*1
1,2,3-Butatrien-1-yl anion		388.5	386.6	± 1.1	kJ/mol	51.0672 ± 0.0032	102275-54-7*0
Hydrogen fluoride			-321.05	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*818
Silylene		361.2	359.6	± 1.1	kJ/mol	30.10138 ± 0.00033	13825-90-6*1
Di-mu-hydrodihydrodisilicon		373.1	362.7	± 2.4	kJ/mol	60.20276 ± 0.00066	129970-82-7*12
Methylsilane		-10.32	-26.49	± 0.93	kJ/mol	46.14384 ± 0.00095	992-94-9*0
Trimethylsiloxy		-188.2	-211.2	± 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		155.88	138.76	± 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		251.17	234.14	± 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
Naphthalene		171.10	147.63	± 0.59	kJ/mol	128.1705 ± 0.0080	91-20-3*0
Disulfene oxide		-50.49	-52.51	± 0.49	kJ/mol	80.1314 ± 0.0120	20901-21-7*0
Sulfur hydroxide oxide		-473.9	-483.4	± 1.7	kJ/mol	97.0715 ± 0.0061	12337-07-4*1
Methyliumylidene		1619.764	1623.107	± 0.051	kJ/mol	13.01809 ± 0.00080	24361-82-8*0
Ethylidyne		508.56	504.86	± 0.80	kJ/mol	27.0452 ± 0.0016	67624-57-1*1
Vinylidene anion		364.02	363.83	± 0.50	kJ/mol	26.0378 ± 0.0016	66295-36-1*0
Oxygen atom		436.665	438.523	± 0.0021	kJ/mol	15.99940 ± 0.00030	17778-80-2*2
Trioxidanyl		25.36	23.38	± 0.13	kJ/mol	49.00614 ± 0.00090	12500-78-6*1
Cyanomethanide		114.16	111.33	± 0.59	kJ/mol	40.0446 ± 0.0016	21438-99-3*0
Methanol cation		856.82	846.50	± 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		-596.84	-606.95	± 0.83	kJ/mol	62.0248 ± 0.0012	463-79-6*2
Carbonic acid		-561.61	-570.45	± 0.97	kJ/mol	62.0248 ± 0.0012	463-79-6*3
Hydrogen carbonate		-720.5	-726.9	± 1.4	kJ/mol	61.0174 ± 0.0012	71-52-3*0
Propylidene		349.52	335.83	± 0.96	kJ/mol	42.0797 ± 0.0024	6700-78-3*1
Hydroxyde			-229.980	± 0.027	kJ/mol	17.00789 ± 0.00031	14280-30-9*800
Allyl anion		133.95	122.94	± 0.22	kJ/mol	41.0723 ± 0.0024	1724-46-5*0
Cyclopropyl		303.82	291.19	± 0.94	kJ/mol	41.0718 ± 0.0024	2417-82-5*0
Propylidyne		624.6	613.1	± 1.3	kJ/mol	41.0718 ± 0.0024	85056-54-8*2
Dinitrogen tetraoxide		20.20	10.91	± 0.14	kJ/mol	92.0111 ± 0.0012	10544-72-6*0
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		91.26	66.49	± 0.85	kJ/mol	57.1143 ± 0.0033	2348-55-2*0
t-Butyl anion		76.9	52.1	± 1.3	kJ/mol	57.1148 ± 0.0033	65114-21-8*0
Nitroxyl		79.40	74.14	± 0.19	kJ/mol	62.00494 ± 0.00090	12033-49-7*0
2-Hydroxyethenyl		138.01	131.27	± 0.72	kJ/mol	43.0446 ± 0.0016	108665-16-3*21
Oxirene		387.9	383.6	± 1.4	kJ/mol	42.0367 ± 0.0016	157-18-6*11
Oxiranylidene		213.5	209.2	± 1.4	kJ/mol	42.0367 ± 0.0016	50983-85-2*2
Hydroxyformyl anion		-313.67	-315.47	± 0.57	kJ/mol	45.0180 ± 0.0010	78944-70-4*1
Azanylium		944.274	937.319	± 0.029	kJ/mol	17.03001 ± 0.00022	19496-55-0*0
Ethoxyethene		-118.0	-141.8	± 1.5	kJ/mol	72.1057 ± 0.0033	109-92-2*2
Iodine monobromide		49.717	40.770	± 0.067	kJ/mol	206.8085 ± 0.0010	7789-33-5*0
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	± 1.3	kJ/mol	59.0440 ± 0.0017	16481-04-2*1
(Formyloxy)methyl		-151.7	-159.8	± 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
Bromochlorane		21.881	14.437	± 0.060	kJ/mol	115.3567 ± 0.0013	13863-41-7*0
Oxalic acid		-721.1	-731.7	± 1.2	kJ/mol	90.0349 ± 0.0020	144-62-7*0
(Methylamino)methyl cation		729.41	710.79	± 0.96	kJ/mol	44.0752 ± 0.0017	31277-24-40
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
Oxidanylium		1293.361	1293.390	± 0.025	kJ/mol	17.00679 ± 0.00031	12259-29-9*0
Bromotrichloromethane		-29.66	-38.81	± 0.54	kJ/mol	198.2728 ± 0.0030	75-62-7*0
Dichloromethyl		92.91	90.99	± 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	-63.0	± 1.4	kJ/mol	66.4866 ± 0.0013	593-78-2*0
1,2-Dichloroethane		-118.53	-130.47	± 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		-256.41	-263.61	± 0.85	kJ/mol	68.4777 ± 0.0012	593-70-4*0
Difluoromethyliumyl		908.29	908.72	± 0.77	kJ/mol	50.00696 ± 0.00080	54250-40-7*0
Fluoromethyliumylidene		1123.08	1126.30	± 0.45	kJ/mol	31.00855 ± 0.00080	33412-11-2*0
1,2-Difluoroacetylene		2.90	5.73	± 0.65	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
Hypochloroperoxoous acid, hydroxy ester		48.5	41.5	± 1.8	kJ/mol	84.4588 ± 0.0013	928652-99-7*1
o-Benzyne anion		413.81	404.70	± 0.96	kJ/mol	76.0965 ± 0.0048	100569-88-8*0
Cycloheptene		28.43	-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		789.00	773.98	± 0.89	kJ/mol	96.1018 ± 0.0048	34468-25-2*0
Nitrosobenzene		216.0	199.1	± 1.2	kJ/mol	107.1100 ± 0.0048	586-96-9*0
Dioxaziridinyl		355.1	352.6	± 1.4	kJ/mol	46.00554 ± 0.00060	66252-29-7*0
1-Methylethoxy		-25.13	-44.24	± 0.75	kJ/mol	59.0871 ± 0.0025	3958-66-5*0
Nitromethyl		139.0	129.6	± 1.2	kJ/mol	60.0321 ± 0.0010	16787-85-2*0
2-Butanone		-216.87	-238.33	± 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
Formaldoxime		30.5	19.9	± 1.3	kJ/mol	45.04066 ± 0.00088	75-17-2*1
Trioxygen difluoride		112.3	106.6	± 1.1	kJ/mol	85.99501 ± 0.00090	16829-28-0*1
Iodine		107.157	106.757	± 0.0021	kJ/mol	126.904470 ± 0.000030	14362-44-8*1
1,3-Cyclobutadien-1-yl		653.8	649.3	± 1.1	kJ/mol	51.0666 ± 0.0032	127611-22-7*0
Silylsilylene		315.6	307.8	± 2.0	kJ/mol	60.20276 ± 0.00066	50420-90-1*2
Trimethylsiloxide		-486.8	-510.6	± 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		429.9	420.1	± 1.6	kJ/mol	78.1118 ± 0.0048	177856-38-1*0
Nitrosamine		85.00	76.12	± 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		-401.06	-403.32	± 0.76	kJ/mol	64.0653 ± 0.0060	12143-17-8*0
Sulfanyl		142.93	143.38	± 0.23	kJ/mol	33.0739 ± 0.0060	13940-21-1*0
Carbide		504.64	511.21	± 0.37	kJ/mol	24.0219 ± 0.0016	12595-78-7*0
Carbon dioxide		49.8	50.6	± 1.1	kJ/mol	44.00950 ± 0.00100	124-38-9*1
Bicyclo[1.1.0]buta-1,3-diene-2,4-diyl		1047.22	1054.81	± 0.68	kJ/mol	48.0428 ± 0.0032	12184-80-4*0
Methane cation		1150.681	1144.299	± 0.061	kJ/mol	16.04191 ± 0.00085	20741-88-2*0
Oxygen atom		246.844	249.229	± 0.0021	kJ/mol	15.99940 ± 0.00030	17778-80-2*1
Ethanium		874.32	858.08	± 0.62	kJ/mol	31.0764 ± 0.0017	24669-33-8*0
Iodide			-56.828	± 0.089	kJ/mol	126.905019 ± 0.000030	20461-54-5*800
Acetylene cation		1328.86	1328.19	± 0.13	kJ/mol	26.0367 ± 0.0016	25641-79-6*0
1-Ethylium-1-ylidene		1329.7	1328.2	± 1.2	kJ/mol	27.0447 ± 0.0016	78949-84-5*0
Ethylidyne anion		457.0	453.0	± 1.2	kJ/mol	27.0458 ± 0.0016	117768-70-4*0
Trioxidanylium		1070.4	1064.1	± 1.4	kJ/mol	49.00559 ± 0.00090	74241-49-9*1
Isocyanomethyl		363.7	361.3	± 1.2	kJ/mol	40.0440 ± 0.0016	70971-59-4*0
Methyloxoniumylidene		1062.76	1054.95	± 0.75	kJ/mol	31.03337 ± 0.00088	58157-09-8*0
Hydroxymethylene		131.11	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
Bromide			-120.88	± 0.14	kJ/mol	79.90455 ± 0.00100	24959-67-9*800
1-Methylethylidene		326.8	313.7	± 1.2	kJ/mol	42.0797 ± 0.0024	40852-89-9*1
Allylium		964.53	952.97	± 0.40	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
Cyclopropynyl		711.00	715.12	± 0.85	kJ/mol	37.0400 ± 0.0024	119178-99-3*0
Hydrogen chloride			-165.755	± 0.025	kJ/mol	36.46064 ± 0.00090	7647-01-0*828
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		-11.04	-23.67	± 0.93	kJ/mol	45.0605 ± 0.0017	4422-54-2*2
Dinitrogen pentoxide		24.46	14.89	± 0.35	kJ/mol	108.0105 ± 0.0015	10102-03-1*0
Vinyl alcohol cation		778.6	767.3	± 1.3	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
Hydroxyimidogen		217.87	214.98	± 0.77	kJ/mol	31.01408 ± 0.00032	35337-59-8*0
Oxiranylium		901.3	893.3	± 1.4	kJ/mol	43.0441 ± 0.0016	57789-76-1*2
C=O=C		653.0	657.3	± 1.5	kJ/mol	40.0208 ± 0.0016	12071-23-71
C=O=C		721.9	726.3	± 1.6	kJ/mol	40.0208 ± 0.0016	12071-23-72
Oxoethylidene		275.5	272.6	± 1.7	kJ/mol	42.0367 ± 0.0016	39920-84-8*2
Ethyl hydroperoxide		-143.0	-161.4	± 1.2	kJ/mol	62.0678 ± 0.0018	3031-74-1*0
Formic acid cation		721.92	714.83	± 0.25	kJ/mol	46.0248 ± 0.0010	50614-05-6*1
Formyloxidanyl		-122.05	-125.40	± 0.55	kJ/mol	45.0174 ± 0.0010	16499-21-1*2
Azide		193.52	190.02	± 0.91	kJ/mol	42.02077 ± 0.00021	14343-69-2*0
Bromonium		924.2	913.4	± 3.0	kJ/mol	81.9193 ± 0.0010	36658-54-5*0
Fluoride			-334.51	± 0.16	kJ/mol	18.99895178 ± 0.00000050	16984-48-8*800
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		-136.1	-144.2	± 1.3	kJ/mol	59.0440 ± 0.0017	3122-12-1*2
Carboxymethyl		-206.3	-215.7	± 1.2	kJ/mol	59.0440 ± 0.0017	2887-46-9*2
Dimethylamide		122.5	104.1	± 1.7	kJ/mol	44.0763 ± 0.0017	34285-60-4*0
Hydrogen difluoride		-198.5	-198.4	± 1.2	kJ/mol	39.004746 ± 0.000070	12528-21-1*1
1H-Triazirin-1-yl		585.9	584.1	± 2.0	kJ/mol	42.02022 ± 0.00021	912535-95-6*0
Chlorine difluoride		-47.0	-48.2	± 1.4	kJ/mol	73.44951 ± 0.00090	24801-48-7*0
1,1,2-Trichloroethane		-135.6	-147.3	± 1.1	kJ/mol	133.4033 ± 0.0031	79-00-5*0
1,1,1,2-Tetrachloroethane		-144.4	-152.9	± 1.3	kJ/mol	167.8481 ± 0.0039	630-20-6*0
Pentachloroethyl		28.9	27.0	± 1.3	kJ/mol	201.2849 ± 0.0048	7094-17-9*0
Chloryl hydride		197.7	191.2	± 1.6	kJ/mol	68.4594 ± 0.0011	174365-32-3*0
Bromo hypobromite		120.9	104.4	± 1.2	kJ/mol	175.8074 ± 0.0020	21308-80-5*0
Iodomethane			-12.30	± 0.20	kJ/mol	141.93899 ± 0.00083	74-88-4*590
Difluoromethylene		43.34	44.06	± 0.36	kJ/mol	50.00751 ± 0.00080	2154-59-8*1
Ethyl iodide		-9.34	-39.21	± 0.49	kJ/mol	155.9656 ± 0.0016	75-03-6*500
cis-1,2-Difluoroethene	$F/C=C\F$	-302.81	-309.57	± 0.90	kJ/mol	64.0341 ± 0.0016	1630-77-9*0
Fluoroethynyl		445.3	449.8	± 1.6	kJ/mol	43.0198 ± 0.0016	22533-50-2*0
Fluoro(fluorooxy)methylene		-134.8	-136.0	± 1.3	kJ/mol	66.00691 ± 0.00085	479587-30-9*2
Dibromophosgene		-97.98	-113.92	± 0.37	kJ/mol	187.8181 ± 0.0022	593-95-3*0
Benzene		50.87	49.33	± 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
Cycloheptane		-72.49	-117.99	± 0.53	kJ/mol	98.1861 ± 0.0057	291-64-5*0
Peroxynitric acid		-42.6	-52.9	± 1.3	kJ/mol	79.0123 ± 0.0012	26404-66-0*0
Iodine cation		1115.549	1115.149	± 0.0062	kJ/mol	126.903921 ± 0.000030	22541-93-1*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
Hydrogen fluoride			-321.10	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*820
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
Bifluoride		-481.7	-480.6	± 1.9	kJ/mol	39.005295 ± 0.000070	18130-74-02
Isocyanoethene		285.16	278.66	± 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
Nitrosyl chloride		54.477	52.575	± 0.069	kJ/mol	65.45884 ± 0.00095	2696-92-6*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	418.6	± 1.2	kJ/mol	51.0672 ± 0.0032	119611-65-3*2
But-3-en-1-yn-1-ide		326.7	323.6	± 1.4	kJ/mol	51.0672 ± 0.0032	58870-47-6*2
Cyclobutenyl		337.2	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		-278.6	-280.0	± 2.0	kJ/mol	60.08430 ± 0.00067	7631-86-9*0
Tetrafluorosilane		-1609.85	-1615.36	± 0.37	kJ/mol	104.07911 ± 0.00030	7783-61-1*0
Silylidyne		370.57	372.37	± 0.75	kJ/mol	29.09344 ± 0.00031	13774-94-2*0
Water anion		31.3	29.8	± 3.1	kJ/mol	18.01583 ± 0.00033	12259-30-2*100
Benzvalene		404.4	386.7	± 1.2	kJ/mol	78.1118 ± 0.0048	659-85-8*0
Diazenyl		252.14	249.23	± 0.45	kJ/mol	29.02142 ± 0.00016	36882-13-0*0
Phenanthrene		231.89	203.08	± 0.80	kJ/mol	178.2292 ± 0.0112	85-01-8*0
Aniline		108.81	86.80	± 0.73	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
Dioxidenium		1110.88	1107.99	± 0.11	kJ/mol	33.00619 ± 0.00060	12207-52-2*0
Methylammonium		628.5	609.6	± 1.4	kJ/mol	32.06453 ± 0.00091	17000-00-9*0
Aminomethylene		245.9	238.2	± 1.5	kJ/mol	29.04126 ± 0.00083	35430-17-2*0
Nitrosodioxaziridine		413.7	407.7	± 1.8	kJ/mol	76.01168 ± 0.00091	132871-99-9*1
Methyleneamidogen anion		192.78	189.02	± 0.91	kJ/mol	28.03387 ± 0.00082	28892-56-0*0
(Z)-Iminomethyl		294.51	291.02	± 0.90	kJ/mol	28.03332 ± 0.00082	54980-11-9*0
Aminomethylidyne		371.9	368.4	± 1.1	kJ/mol	28.03332 ± 0.00082	84654-89-7*0
Ethynylamidogen		395.40	393.37	± 0.97	kJ/mol	40.0440 ± 0.0016	73456-14-1*0
Chlorine chlorite		168.6	166.2	± 1.3	kJ/mol	102.9042 ± 0.0019	105206-44-8*3
Methyleneoxonium		152.47	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
Hydroxyaminiumyl		1161.1	1158.2	± 1.4	kJ/mol	31.01353 ± 0.00032	63559-88-6*0
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
Hydroxyoxomethoxy		-358.8	-364.8	± 1.5	kJ/mol	61.0168 ± 0.0012	38330-85-7*0
Hydroperoxycarbonyl		-72.9	-76.7	± 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
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
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	± 0.83	kJ/mol	37.0406 ± 0.0024	82893-67-2*0
t-Butylium		734.05	710.77	± 0.98	kJ/mol	57.1137 ± 0.0033	14804-25-2*0
iso-Butyl		97.17	73.18	± 0.92	kJ/mol	57.1143 ± 0.0033	4630-45-9*0
Methylcyclopropane		47.9	24.6	± 1.3	kJ/mol	56.1063 ± 0.0032	594-11-6*0
Trioxidaniumyl		925.5	916.3	± 1.5	kJ/mol	50.01353 ± 0.00091	161321-37-5*2
Chlorosyl hydride		141.9	139.0	± 1.7	kJ/mol	52.46004 ± 0.00095	71572-35-5*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
2,2-Dimethylbutane		-145.26	-185.69	± 0.75	kJ/mol	86.1754 ± 0.0049	75-83-2*0
n-Nonane		-176.16	-227.95	± 0.50	kJ/mol	128.2551 ± 0.0073	111-84-2*0
Ethanol		-269.75	-277.51	± 0.21	kJ/mol	46.0684 ± 0.0017	64-17-5*500
Vinyl alcohol cation		786.56	775.34	± 0.80	kJ/mol	44.0520 ± 0.0017	57239-63-1*1
Vinoxy cation		1020.3	1013.2	± 1.5	kJ/mol	43.0441 ± 0.0016	35731-40-91
Vinoxide		-152.90	-159.95	± 0.59	kJ/mol	43.0452 ± 0.0016	35731-40-9*0
Oxywater		64.9	58.4	± 1.3	kJ/mol	34.01468 ± 0.00062	171363-09-0*0
Oxiranyl anion		121.4	113.3	± 1.5	kJ/mol	43.0452 ± 0.0016	72722-59-9*2
Acetic acid			-485.10	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*800
Ketene		-45.36	-48.42	± 0.11	kJ/mol	42.0367 ± 0.0016	463-51-4*2
COC vdW		589.8	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
Hydroperoxymethyl		72.9	65.6	± 1.2	kJ/mol	47.0333 ± 0.0010	74087-87-9*0
Formyloxoniumylidene		1017.4	1013.9	± 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
2-Hydrotrioxy anion		27.5	21.8	± 1.4	kJ/mol	49.00669 ± 0.00090	89965-38-80
Dihydrogen fluoride anion		133.2	131.9	± 1.6	kJ/mol	21.01483 ± 0.00014	117339-92-1*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		-203.2	-218.4	± 1.5	kJ/mol	73.0706 ± 0.0025	54668-31-4*1
(Acetyloxy)methyl		-200.4	-214.1	± 1.5	kJ/mol	73.0706 ± 0.0025	2887-49-2*1
Aziridine		143.25	126.71	± 0.89	kJ/mol	43.0678 ± 0.0016	151-56-4*0
Chlorine difluoride cation		998.9	996.7	± 1.7	kJ/mol	73.44896 ± 0.00090	32629-46-2*0
Dimethylmethyleneammonium		696.9	671.9	± 1.3	kJ/mol	58.1018 ± 0.0025	28149-27-1*0
Xenon cation		1170.354	1170.354	± 0.0062	kJ/mol	131.2895 ± 0.0200	24203-25-6*0
Dioxyamidogen		240.5	233.8	± 1.8	kJ/mol	47.01348 ± 0.00061	71843-95-3*2
Trichloromethide		-123.2	-122.7	± 2.0	kJ/mol	118.3693 ± 0.0028	14478-07-0*0
Oxygen anion monohydrate		-239.0	-244.3	± 3.0	kJ/mol	34.01523 ± 0.00062	31748-17-1*0
1,1,2,2-Tetrachloroethane		-146.7	-156.1	± 1.5	kJ/mol	167.8481 ± 0.0039	79-34-5*0
1,1,2,2-Tetrachloroethane		-172.9	-201.8	± 1.5	kJ/mol	167.8481 ± 0.0039	79-34-5*500
Pentachloroethane			-201.9	± 2.5	kJ/mol	202.2928 ± 0.0048	76-01-7*500
Trichloroethene			-48.8	± 1.5	kJ/mol	131.3874 ± 0.0031	79-01-6*590
Tetrachloroethene			-61.13	± 0.99	kJ/mol	165.8322 ± 0.0039	127-18-4*500
Oxygen cation monohydrate		1153.3	1147.8	± 3.3	kJ/mol	34.01413 ± 0.00062	31748-17-10
Trichloroethene		-10.9	-14.2	± 1.5	kJ/mol	131.3874 ± 0.0031	79-01-6*0
Bromodichloromethane		-34.9	-46.7	± 1.2	kJ/mol	163.8280 ± 0.0022	75-27-4*0
Difluorodibromomethane		-360.4	-378.4	± 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		-410.90	-424.10	± 0.46	kJ/mol	130.9194 ± 0.0013	1511-62-2*0
1,2-Difluoroethane		-434.34	-447.76	± 0.81	kJ/mol	66.0500 ± 0.0016	624-72-6*0
Methylidyne		592.838	596.172	± 0.097	kJ/mol	13.01864 ± 0.00080	3315-37-5*1
Fluoro(fluorooxy)methylene		-37.4	-39.1	± 1.4	kJ/mol	66.00691 ± 0.00085	479587-30-9*1
Benzenium		887.8	867.7	± 1.1	kJ/mol	79.1192 ± 0.0048	26812-57-7*0
Phenylium		1250.9	1237.8	± 1.6	kJ/mol	77.1034 ± 0.0048	17333-73-2*1
Peroxynitrous acid		-0.13	-7.18	± 0.53	kJ/mol	63.01288 ± 0.00091	14691-52-2*2
Benzylium		929.64	910.14	± 0.55	kJ/mol	91.1299 ± 0.0056	6711-19-9*0
Peroxychlorous acid		95.4	89.4	± 2.0	kJ/mol	84.4588 ± 0.0013	177778-92-6*1
Benzoyl chloride			-157.08	± 0.26	kJ/mol	140.5667 ± 0.0057	98-88-4*500
Benzoyl chloride		-90.1	-105.4	± 1.3	kJ/mol	140.5667 ± 0.0057	98-88-4*0
Hydrogen difluoride cation		1174.3	1171.3	± 1.5	kJ/mol	39.004198 ± 0.000070	126950-54-70
Chlorobenzene cation		942.55	928.62	± 0.61	kJ/mol	112.5561 ± 0.0049	55450-32-3*0
Chlorobenzene			11.30	± 0.59	kJ/mol	112.5566 ± 0.0049	108-90-7*500
m-Chlorophenyl		320.2	309.4	± 1.6	kJ/mol	111.5487 ± 0.0049	3474-40-6*0
p-Chlorophenyl		323.1	312.3	± 1.6	kJ/mol	111.5487 ± 0.0049	2396-00-1*0
o-Chlorophenyl		327.4	316.7	± 1.6	kJ/mol	111.5487 ± 0.0049	3474-42-8*0
Bromobenzene cation		994.9	973.4	± 1.3	kJ/mol	157.0074 ± 0.0049	55450-33-4*0
Iodobenzene		113.0	113.1	± 1.1	kJ/mol	204.0084 ± 0.0048	591-50-4*500
Nitrobenzene		81.7	61.7	± 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
Dioxiranylidene		190.3	191.1	± 1.4	kJ/mol	44.00950 ± 0.00100	138832-57-2*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
2-Cyclopropen-1-imine		401.9	394.1	± 1.4	kJ/mol	53.0627 ± 0.0024	31589-17-0*0
(E)-Diazene cation		1132.49	1125.55	± 0.64	kJ/mol	30.02881 ± 0.00020	59952-06-6*0
1-Isocyanovinyl		519.1	517.3	± 1.4	kJ/mol	52.0547 ± 0.0024	321850-14-0*0
Perchloric acid		11.7	0.2	± 1.3	kJ/mol	100.4582 ± 0.0015	7601-90-3*0
Chlorine fluoride cation		1165.53	1165.71	± 0.49	kJ/mol	54.45055 ± 0.00090	12432-44-9*0
Vinylvinylidene		494.1	488.8	± 1.7	kJ/mol	52.0746 ± 0.0032	148759-16-4*2
Bifluoride		-68.0	-67.6	± 1.6	kJ/mol	39.005295 ± 0.000070	18130-74-01
Triiodide			-51.30	± 0.80	kJ/mol	380.713959 ± 0.000090	14900-04-0*800
(Z)-Diazene	$[H]/N=N\[H]$	228.83	221.69	± 0.63	kJ/mol	30.02936 ± 0.00020	15626-42-3*0
Deuterium atom		219.804	221.717	± 0.000	kJ/mol	2.01410177800 ± 0.00000000040	16873-17-9*0
But-1-en-3-yn-1-ide		422.4	421.0	± 1.3	kJ/mol	51.0672 ± 0.0032	119611-65-3*1
2-Hydrotrioxy cation		1298.2	1291.5	± 1.5	kJ/mol	49.00559 ± 0.00090	74241-49-90
Tetrahedryl anion		634.6	630.8	± 1.6	kJ/mol	51.0672 ± 0.0032	138805-00-2*0
Silicon carbide		739.6	744.6	± 2.4	kJ/mol	40.09620 ± 0.00085	409-21-2*0
Silicon carbide		-71.6	-72.6	± 1.4	kJ/mol	40.09620 ± 0.00085	409-21-2*501
Silanide		68.6	63.0	± 1.4	kJ/mol	31.10987 ± 0.00037	15807-96-2*0
Dimethylsilanone		-237.9	-253.4	± 2.3	kJ/mol	74.1539 ± 0.0017	47956-45-6*0
Dimethylsilane		-66.8	-88.3	± 1.2	kJ/mol	60.1704 ± 0.0017	1111-74-6*0
Fluorohydrochlorine cation		975.3	972.3	± 2.0	kJ/mol	55.45849 ± 0.00090	70110-64-4*0
Hydroxysilyl anion		-220.1	-228.0	± 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
Oxofluoronium		1342.67	1342.62	± 0.81	kJ/mol	34.99725 ± 0.00030	12763-67-6*0
Propargylallene		431.4	419.8	± 1.4	kJ/mol	78.1118 ± 0.0048	33142-15-3*3
Diacetylide		460.9	465.9	± 1.0	kJ/mol	49.0513 ± 0.0032	59012-21-4*0
Hydrogen fluoride			-321.14	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*821
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
Isoformyl anion		267.4	268.0	± 1.6	kJ/mol	29.01859 ± 0.00086	81747-63-9*2
Trifluoromethide		-637.5	-639.3	± 1.8	kJ/mol	69.00646 ± 0.00080	54128-17-5*0
Chloride			-166.989	± 0.023	kJ/mol	35.45325 ± 0.00090	16887-00-6*800
Allene cation		1132.19	1125.03	± 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		452.61	445.48	± 0.90	kJ/mol	40.0639 ± 0.0024	19527-08-3*2
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
1,3-Butadienyl anion		265.4	255.0	± 1.5	kJ/mol	53.0830 ± 0.0032	65114-68-3*0
Dihydrogen fluoride anion		-257.0	-260.1	± 1.9	kJ/mol	21.01483 ± 0.00014	117339-92-12
n-Decane		-192.09	-248.83	± 0.80	kJ/mol	142.2817 ± 0.0081	124-18-5*0
Ethyloxoniumyl		783.2	766.3	± 1.7	kJ/mol	46.0679 ± 0.0017	34480-55-2*0
1-Hydroxyethyl		-41.52	-54.99	± 0.92	kJ/mol	45.0605 ± 0.0017	2348-46-1*2
1-Hydroxyethylium		608.73	594.30	± 0.38	kJ/mol	45.0600 ± 0.0017	18682-96-7*0
2-Hydroxyethylium		1019.1	1006.2	± 1.5	kJ/mol	45.0600 ± 0.0017	38607-31-7*3
2-Cyclopropyn-1-ylidene		898.9	905.8	± 1.6	kJ/mol	36.0321 ± 0.0024	102508-15-6*1
Ethyloxoniumylidene		988.6	974.9	± 1.5	kJ/mol	45.0600 ± 0.0017	54387-07-4*0
Acetaldehyde cation		831.96	821.98	± 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
2-Cyclopropyn-1-ylium-1-yl		1944.6	1952.5	± 1.9	kJ/mol	36.0316 ± 0.0024	154702-35-9*0
Methoxymethylene		245.3	235.8	± 1.4	kJ/mol	44.0526 ± 0.0017	19527-10-7*1
1-Hydroxyethenyl		121.34	114.96	± 0.88	kJ/mol	43.0446 ± 0.0016	81847-74-7*0
Iminomethide		237.4	233.5	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*1
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
Ketenyl anion		-48.46	-47.53	± 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
Oxochloronium		1150.86	1150.70	± 0.66	kJ/mol	51.45155 ± 0.00095	12301-79-0*0
Dicarbon monoxide		440.22	444.55	± 0.83	kJ/mol	40.0208 ± 0.0016	12071-23-7*2
Vinylidene		610.44	610.15	± 0.50	kJ/mol	26.0373 ± 0.0016	2143-69-3*1
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
Nitrous acid		-71.35	-77.71	± 0.26	kJ/mol	47.01348 ± 0.00061	7782-77-6*2
1,3-Butadiyne-1,4-diyl		1052.40	1062.37	± 0.65	kJ/mol	48.0428 ± 0.0032	78015-07-3*0
Fluorosyl fluoride		192.8	193.3	± 2.3	kJ/mol	53.99621 ± 0.00030	86825-57-2*1
Isocyanic acid cation		1002.99	1000.32	± 0.49	kJ/mol	43.02423 ± 0.00086	444010-28-0*0
Fulminic acid cation		1215.7	1212.9	± 1.3	kJ/mol	43.02423 ± 0.00086	114766-65-3*0
Dioxygen		94.410	94.383	± 0.000	kJ/mol	31.99880 ± 0.00060	7782-44-7*2
Acetic acid			-484.84	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*840
1,2-Ethenediol		-254.0	-266.4	± 1.3	kJ/mol	60.0520 ± 0.0017	1571-60-4*2
Hydrogen fluoride			-321.06	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*902
Acetyl chloride			-272.11	± 0.33	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		-355.5	-374.6	± 1.4	kJ/mol	74.0785 ± 0.0025	109-94-4*2
Acetoxy		-182.22	-191.04	± 0.85	kJ/mol	59.0440 ± 0.0017	13799-69-4*1
2-Methoxy-2-oxoethyl		-173.1	-188.3	± 1.7	kJ/mol	73.0706 ± 0.0025	54668-31-4*2
(Acetyloxy)methyl		-174.1	-187.1	± 1.7	kJ/mol	73.0706 ± 0.0025	2887-49-2*2
Hydroxyoxoethenyl		24.6	22.8	± 1.7	kJ/mol	57.0281 ± 0.0017	702699-39-6*0
Azanylium		1266.57	1264.49	± 0.11	kJ/mol	16.02207 ± 0.00016	15194-15-7*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		-104.58	-124.00	± 0.41	kJ/mol	153.8215 ± 0.0037	56-23-5*500
Hydrogen chloride			-166.562	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*839
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
Hydroxydioxonitrate		-193.2	-197.5	± 2.4	kJ/mol	63.01343 ± 0.00091	58875-09-5*0
Chloromethylium		962.4	958.5	± 1.2	kJ/mol	49.4787 ± 0.0012	59000-00-9*0
Chloromethylene		346.24	346.55	± 0.89	kJ/mol	48.4713 ± 0.0012	2108-20-5*1
Hydrogen difluoride		-187.3	-187.1	± 1.6	kJ/mol	39.004746 ± 0.000070	12528-21-1*2
1,2-Dichloroethane			-165.68	± 0.56	kJ/mol	98.9586 ± 0.0024	107-06-2*500
1,1-Dichloroethane			-163.76	± 0.48	kJ/mol	98.9586 ± 0.0024	75-34-3*500
Dioxygenyl ion monohydrate		828.5	821.5	± 2.1	kJ/mol	50.01353 ± 0.00091	11083-61-7*0
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			-130.92	± 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
Ammonia			-80.881	± 0.053	kJ/mol	17.03056 ± 0.00022	7664-41-7*1000
Fluoromethylene		148.41	148.69	± 0.43	kJ/mol	32.01704 ± 0.00080	13453-52-6*0
Hydrogen fluoride			-321.17	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*822
Ethyl iodide		8.77	-7.11	± 0.49	kJ/mol	155.9656 ± 0.0016	75-03-6*0
Chlorohydrofluorine cation		1000.9	998.1	± 2.1	kJ/mol	55.45849 ± 0.00090	70110-63-3*0
1,2-Dibromoacetylene		332.4	321.5	± 2.3	kJ/mol	183.8294 ± 0.0026	624-61-3*0
Chlorosyl chloride		134.5	133.2	± 1.4	kJ/mol	86.9048 ± 0.0018	86825-56-1*0
Fluoro(fluorooxy)methylene		-97.4	-95.6	± 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
Azidonitrene		692.1	687.5	± 1.4	kJ/mol	56.02696 ± 0.00028	147363-92-6*2
Benzene cation		992.67	976.21	± 0.22	kJ/mol	78.1113 ± 0.0048	34504-50-2*0
Fluoronium		1490.1	1491.4	± 1.9	kJ/mol	21.01373 ± 0.00014	12206-67-6*1
Ammonium nitrate		-350.23	-365.19	± 0.18	kJ/mol	80.04344 ± 0.00095	6484-52-2*500
Benzoic acid		-367.30	-384.72	± 0.17	kJ/mol	122.1213 ± 0.0056	65-85-0*500
Nitronium		961.81	958.25	± 0.20	kJ/mol	46.00499 ± 0.00060	14522-82-8*0
Diiodide		-178.13	-180.72	± 0.48	kJ/mol	253.809489 ± 0.000060	12190-71-5*0
2,3-Dimethylbenzaldehyde		-66.4	-94.4	± 2.4	kJ/mol	134.1751 ± 0.0072	5779-93-1*0
(2,3-dimethylphenyl)oxomethyl		82.5	59.8	± 2.6	kJ/mol	133.1672 ± 0.0072	104680-89-90
m-Chlorophenide		172.3	162.2	± 1.6	kJ/mol	111.5492 ± 0.0049	77748-34-6*0
p-Chlorophenide		179.3	168.9	± 1.5	kJ/mol	111.5492 ± 0.0049	77748-42-6*0
o-Chlorophenide		158.4	148.5	± 1.5	kJ/mol	111.5492 ± 0.0049	72863-53-7*0
2-Oxopropylium		784.6	770.8	± 1.7	kJ/mol	57.0707 ± 0.0024	54088-52-7*0
2,3-Butanedione		-310.56	-327.12	± 0.63	kJ/mol	86.0892 ± 0.0033	431-03-8*0
1,2-Dibromoethane		-11.7	-38.5	± 1.2	kJ/mol	187.8612 ± 0.0026	106-93-4*0
(Hydroxyimino)methyl		250.1	244.0	± 1.8	kJ/mol	44.03272 ± 0.00087	206442-92-4*1
Cyanogen iodide anion		86.5	88.9	± 8.1	kJ/mol	152.92246 ± 0.00080	1356929-44-6*0
Ethylene cation		1075.19	1067.98	± 0.12	kJ/mol	28.0526 ± 0.0016	34470-02-5*0
Peroxyimidogen		405.4	403.4	± 1.9	kJ/mol	46.00554 ± 0.00060	60488-31-50
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		1517.2	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	541.2	± 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
Trihydrogen dioxide anion		-487.4	-495.7	± 1.1	kJ/mol	35.02317 ± 0.00064	12501-19-8*0
Vinylacetylene cation		1221.7	1215.2	± 1.1	kJ/mol	52.0740 ± 0.0032	59699-48-8*0
Methanol		-235.28	-238.61	± 0.16	kJ/mol	32.04186 ± 0.00090	67-56-1*500
Bicyclo[1.1.0]but-2-ylium-1-yl		1287.0	1278.0	± 1.5	kJ/mol	52.0740 ± 0.0032	78525-41-40
Fluorochlorate		-256.02	-255.42	± 0.81	kJ/mol	54.45165 ± 0.00090	12272-56-9*0
3-Methylene-1-cyclopropen-1-yl anion		417.3	413.6	± 1.6	kJ/mol	51.0672 ± 0.0032	117469-28-00
2-Cyclopropen-1-ylidenemethyl		635.7	632.6	± 1.3	kJ/mol	51.0666 ± 0.0032	127611-25-0*0
Dihydrogen cation		1488.364	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*0
5-Methyl-1,3-cyclopentadiene		133.8	110.8	± 1.4	kJ/mol	80.1277 ± 0.0048	96-38-8*0
Disilicon		586.1	589.9	± 1.6	kJ/mol	56.17100 ± 0.00060	12597-35-2*0
Formaldehyde cation		944.857	941.235	± 0.097	kJ/mol	30.02543 ± 0.00087	54288-05-0*0
Peroxychlorite		-34.4	-34.4	± 2.0	kJ/mol	83.4514 ± 0.0013	852472-63-0*0
1-Chloro ozone		226.3	223.0	± 2.3	kJ/mol	83.4509 ± 0.0013	141801-66-3*101
Disiloxane		-331.8	-348.8	± 2.3	kJ/mol	78.21804 ± 0.00079	13597-73-4*0
Tetramethylsilane		-185.0	-215.5	± 2.1	kJ/mol	88.2236 ± 0.0033	75-76-3*0
Trimethylsilyl		47.1	25.1	± 2.2	kJ/mol	73.1891 ± 0.0025	16571-41-8*0
Triiodide		-254.3	-257.5	± 3.4	kJ/mol	380.713959 ± 0.000090	14900-04-0*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
Dibromide		-196.9	-211.0	± 2.3	kJ/mol	159.8085 ± 0.0020	12595-70-9*0
Oxadiazirene		351.7	349.9	± 1.7	kJ/mol	44.01288 ± 0.00033	227934-45-4*0
Dioxymethylidyne		299.8	301.1	± 1.7	kJ/mol	44.00950 ± 0.00100	791121-04-5*0
Diazenide		175.6	176.7	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*100
NON		545.5	542.6	± 1.7	kJ/mol	44.01288 ± 0.00033	227934-46-5*0
Hydrogen atom		-22.3	-25.6	± 1.5	kJ/mol	1.007940 ± 0.000070	12385-13-6*1001001
Hydrogen atom		-33.4	-36.7	± 1.5	kJ/mol	1.007940 ± 0.000070	12385-13-6*1001004
Fluorosyl fluoride anion		-147.1	-146.8	± 3.0	kJ/mol	53.99675 ± 0.00030	86825-57-22
Hydrofluorate ion		-75.6	-75.1	± 1.8	kJ/mol	20.006892 ± 0.000070	37249-79-9*0
Hydrogen bromide			-120.40	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*834
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			-104.94	± 0.41	kJ/mol	70.1329 ± 0.0041	287-92-3*590
Hydrogen fluoride			-321.04	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*901
2-Methylpentane		-134.43	-173.69	± 0.73	kJ/mol	86.1754 ± 0.0049	107-83-5*0
3-Methylpentane		-131.88	-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
Hydrogen bromide			-120.69	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*844
Cyclohexane		-131.78	-155.91	± 0.29	kJ/mol	84.1595 ± 0.0049	110-82-7*500
Nitrosyl nitrate		70.7	62.4	± 1.8	kJ/mol	92.0111 ± 0.0012	15969-55-80
Acetylene anion		356.9	356.7	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*1
1,5-Hexadiene		108.54	83.95	± 0.39	kJ/mol	82.1436 ± 0.0049	592-42-7*0
Hydroxymethylene cation		1482.1	1479.4	± 1.9	kJ/mol	30.02543 ± 0.00087	135395-06-1*3
2-Hydroxyethyl		-6.0	-18.4	± 1.5	kJ/mol	45.0605 ± 0.0017	4422-54-2*3
Ethoxy		1.23	-12.19	± 0.43	kJ/mol	45.0605 ± 0.0017	2154-50-9*0
Carbonic acid		-602.70	-612.01	± 0.75	kJ/mol	62.0248 ± 0.0012	463-79-6*0
Peroxyformic acid		-265.2	-273.0	± 1.5	kJ/mol	62.0248 ± 0.0012	107-32-4*3
Nitrogen hydride oxide		71.2	60.0	± 1.5	kJ/mol	33.02996 ± 0.00037	38544-48-8*0
Iminomethide		252.6	248.9	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*2
Dicarbon monoxide cation		1433.9	1439.0	± 2.1	kJ/mol	40.0203 ± 0.0016	12287-08-0*0
C=O-C cation		1816.9	1820.9	± 2.0	kJ/mol	40.0203 ± 0.0016	83483-98-1*2
Oxirene anion		288.3	285.3	± 2.2	kJ/mol	42.0372 ± 0.0016	157-18-60
Oxoethylidene		261.1	258.3	± 1.1	kJ/mol	42.0367 ± 0.0016	39920-84-8*1
Dihydrogen fluoride anion		-61.9	-60.5	± 3.2	kJ/mol	21.01483 ± 0.00014	117339-92-1*2
Formic acid anion		-241.2	-246.9	± 1.9	kJ/mol	46.0259 ± 0.0010	19066-82-1*2
Perchloryloxy		248.4	240.8	± 1.8	kJ/mol	99.4503 ± 0.0015	12133-63-0*0
Dioxirane cation		1050.8	1043.1	± 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
Hydrogen cyanide cation		1442.52	1442.05	± 0.20	kJ/mol	27.02483 ± 0.00081	12601-62-6*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		-77.3	-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
Hydrogen chloride			-166.680	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*841
Acetic acid		-484.02	-483.59	± 0.18	kJ/mol	60.0520 ± 0.0017	64-19-7*500
Acetic acid			-484.63	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*825
Acetic acid			-484.82	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*835
Nitrous acid		-72.965	-78.622	± 0.080	kJ/mol	47.01348 ± 0.00061	7782-77-6*0
Fluorine atom cation		1758.312	1760.610	± 0.047	kJ/mol	18.99785462 ± 0.00000050	14701-13-4*0
Deuterium atom cation		1532.210	1534.123	± 0.000	kJ/mol	2.01355319809 ± 0.00000000040	14464-47-2*0
Fluorodioxidenium		1222.0	1219.5	± 2.0	kJ/mol	50.99665 ± 0.00060	139584-95-5*0
Perchlorate		-263.9	-272.8	± 2.1	kJ/mol	99.4508 ± 0.0015	14797-73-0*0
Nitrilomethylium		1783.17	1786.65	± 0.48	kJ/mol	26.01689 ± 0.00080	12539-57-0*0
Aminooxy cation		946.00	938.86	± 0.77	kJ/mol	32.02147 ± 0.00034	51375-41-80
Glyoxal		-189.33	-194.77	± 0.72	kJ/mol	58.0361 ± 0.0017	107-22-2*2
Glyoxal		-207.78	-213.34	± 0.57	kJ/mol	58.0361 ± 0.0017	107-22-2*0
Ethynediol		-18.3	-22.0	± 1.7	kJ/mol	58.0361 ± 0.0017	16005-17-7*0
Ethynylene cation		1965.17	1971.75	± 0.45	kJ/mol	24.0209 ± 0.0016	12595-79-8*0
Chlorine difluoride anion		-504.9	-505.7	± 1.9	kJ/mol	73.45005 ± 0.00090	16892-05-0*0
Dimethylaminylium		1040.4	1025.0	± 1.8	kJ/mol	44.0752 ± 0.0017	49784-85-2*0
Trifluoride ion		-348.8	-349.7	± 2.6	kJ/mol	56.9957582 ± 0.0000015	25730-99-8*0
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
Hydroxymethylene anion		160.2	157.5	± 1.7	kJ/mol	30.02653 ± 0.00087	207914-87-2*2
Bromine dioxide		165.6	156.0	± 2.1	kJ/mol	111.9028 ± 0.0012	21255-83-4*0
Dichloromethylene		314.00	315.20	± 0.90	kJ/mol	82.9161 ± 0.0020	1605-72-7*1
Hydroxylamine		-15.4	-25.9	± 1.4	kJ/mol	33.02996 ± 0.00037	7803-49-8*2
Chlorite		-105.51	-107.69	± 0.37	kJ/mol	67.4520 ± 0.0011	14998-27-7*0
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
Chlorohydroxymethyl		-46.2	-51.8	± 2.0	kJ/mol	65.4787 ± 0.0012	147139-06-8*2
Hydrogen chloride			-165.554	± 0.026	kJ/mol	36.46064 ± 0.00090	7647-01-0*825
Tetraoxidanyl		2.1	0.4	± 2.9	kJ/mol	65.0055 ± 0.0012	69696-93-1*100
Aminyliumyl		1659.04	1659.96	± 0.24	kJ/mol	15.014131 ± 0.000099	19067-62-0*0
Trioxidanyl		26.36	23.09	± 0.19	kJ/mol	49.00614 ± 0.00090	12500-78-6*2
1,1,1,2-Tetrachloroethane			-193.5	± 1.1	kJ/mol	167.8481 ± 0.0039	630-20-6*500
Hydroxylamine cation		857.7	847.9	± 1.6	kJ/mol	33.02941 ± 0.00037	62675-55-2*0
Hexachloroethane			-214.1	± 2.8	kJ/mol	236.7376 ± 0.0056	67-72-1*500
Hydrogen peroxide cation		931.04	924.18	± 0.98	kJ/mol	34.01413 ± 0.00062	12325-10-9*2
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
Nitric acid			-206.27	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*839
Bifluoride		-705.20	-709.05	± 0.36	kJ/mol	39.005295 ± 0.000070	18130-74-0*0
Fluorodioxidanide		-256.8	-256.1	± 1.9	kJ/mol	50.99775 ± 0.00060	23553-17-5*0
Propyne cation		1192.61	1186.89	± 0.38	kJ/mol	40.0633 ± 0.0024	34526-53-9*0
Dioxofluorine		524.0	523.2	± 1.0	kJ/mol	50.99720 ± 0.00060	175861-93-5*0
Hydroxymethylene anion		334.0	334.8	± 2.1	kJ/mol	30.02653 ± 0.00087	207914-87-2*3
Fluorochlorobromomethane		-218.2	-230.9	± 4.9	kJ/mol	147.3737 ± 0.0016	593-98-6*0
Trioxidanylium		1085.2	1078.9	± 1.4	kJ/mol	49.00559 ± 0.00090	74241-49-9*2
Nitric acid		-178.96	-173.24	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*500
Fluoromethyliumyl		1116.6	1116.9	± 1.7	kJ/mol	32.01649 ± 0.00080	89877-52-1*0
Fluoromethylene anion		95.95	96.48	± 0.61	kJ/mol	32.01759 ± 0.00080	71267-42-0*0
Azidonitrene		660.8	657.6	± 1.6	kJ/mol	56.02696 ± 0.00028	147363-92-6*1
Polytetrafluoroethylene			-829.88	± 0.57	kJ/mol	100.0150 ± 0.0016	9002-84-0*591
trans-1,2-Difluoroethene		-299.57	-306.01	± 0.90	kJ/mol	64.0341 ± 0.0016	1630-78-0*0
Cyclopropylidene		544.7	535.9	± 1.5	kJ/mol	40.0639 ± 0.0024	2143-70-6*2
Fluoroethynide		133.3	137.5	± 1.5	kJ/mol	43.0204 ± 0.0016	85905-56-2*0
Formyl fluoride cation		816.6	813.4	± 1.3	kJ/mol	48.01589 ± 0.00086	99766-68-4*0
Formyl fluoride		-405.1	-403.6	± 1.6	kJ/mol	47.00905 ± 0.00085	62227-71-8*0
Fluoroisoformyl cation		1347.5	1349.5	± 1.9	kJ/mol	47.00795 ± 0.00085	1871-25-60
Ethane cation		1043.15	1029.15	± 0.59	kJ/mol	30.0685 ± 0.0017	34488-65-8*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
1,3-Cycloheptadiene		123.58	94.47	± 0.78	kJ/mol	94.1543 ± 0.0056	4054-38-0*1
Tropylium		898.8	879.0	± 1.1	kJ/mol	91.1299 ± 0.0056	26811-28-9*0
Chlorine difluoride		22.5	23.9	± 1.9	kJ/mol	73.44951 ± 0.00090	91483-78-2*0
Hydrogen fluoride			-302.41	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*590
Hydroxyaminylium		1048.5	1041.3	± 2.6	kJ/mol	32.02147 ± 0.00034	66097-71-0*2
Fluoroniumyl ion		1275.567	1275.799	± 0.049	kJ/mol	20.005795 ± 0.000070	12381-92-9*0
Hydrogen fluoride			-321.19	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*823
Hydrogen fluoride			-320.89	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*815
cis-1,2-Dibromoethene	$C(\Br)=C\Br$	121.2	100.6	± 2.0	kJ/mol	185.8453 ± 0.0026	590-11-4*0
Dioxaziridinyl cation		1365.8	1363.3	± 1.7	kJ/mol	46.00499 ± 0.00060	66252-29-70
1,1-Dibromoethane		-5.3	-32.3	± 1.8	kJ/mol	187.8612 ± 0.0026	557-91-5*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
Hydroxyamidogen anion		90.6	84.8	± 2.8	kJ/mol	32.02257 ± 0.00034	66097-71-00
Dihydrooxooxygen cation		994.8	988.1	± 1.6	kJ/mol	34.01413 ± 0.00062	177329-59-8*0
Chlorine oxide peroxide		226.5	227.4	± 2.5	kJ/mol	83.4509 ± 0.0013	141801-67-4*100
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
Ethylene anion		232.0	224.4	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*1
Cyanoethynyl		715.7	722.1	± 1.2	kJ/mol	50.0388 ± 0.0024	62435-43-2*0
Dioxaziridinyl anion		295.9	293.5	± 1.7	kJ/mol	46.00609 ± 0.00060	66252-31-1*0
Nitrosyl fluoride		-85.47	-87.84	± 0.79	kJ/mol	49.00454 ± 0.00031	7789-25-5*0
2-Methylene-2H-azirine		404.2	396.9	± 1.7	kJ/mol	53.0627 ± 0.0024	110027-86-6*0
(E)-Diazene anion		265.5	258.7	± 2.0	kJ/mol	30.02991 ± 0.00020	59952-06-60
2-Cyanovinylium		1517.5	1515.3	± 1.8	kJ/mol	52.0542 ± 0.0024	85398-67-0*22
2-Cyanovinyl anion		266.2	263.2	± 1.8	kJ/mol	52.0553 ± 0.0024	85398-67-01
2-Isocyanovinyl		544.6	542.7	± 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
Propynylidene cation		1410.9	1413.5	± 1.3	kJ/mol	38.0474 ± 0.0024	75123-91-0*0
3-Methylcycloprop-3-en-2-ylium-1-yl		1283.9	1277.4	± 1.5	kJ/mol	52.0740 ± 0.0032	185841-59-20
Propynylidene		597.4	599.2	± 1.1	kJ/mol	38.0480 ± 0.0024	67152-18-5*4
Aquacarbon		467.6	465.5	± 1.9	kJ/mol	30.02598 ± 0.00087	81434-73-3*102
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
Iodine		198.109	197.709	± 0.0021	kJ/mol	126.904470 ± 0.000030	14362-44-8*2
1-Buten-3-ynylium		1482.3	1479.8	± 1.4	kJ/mol	51.0661 ± 0.0032	84654-85-3*1
Methyleneoxonium cation		827.7	818.3	± 1.7	kJ/mol	32.04131 ± 0.00090	177788-17-90
3-Buten-1-ynylium		1572.6	1570.2	± 1.7	kJ/mol	51.0661 ± 0.0032	103928-84-3*1
Peroxyimidogen cation		1409.7	1406.8	± 1.9	kJ/mol	46.00499 ± 0.00060	60488-32-60
3-Methylene-1-cyclopropen-1-ylium		1398.7	1395.4	± 1.7	kJ/mol	51.0661 ± 0.0032	117469-28-0*2
Butyraldehyde		-185.30	-205.67	± 0.85	kJ/mol	72.1057 ± 0.0033	123-72-8*0
Chloroallene		181.8	175.1	± 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
Peroxyimidogen anion		165.1	162.7	± 1.7	kJ/mol	46.00609 ± 0.00060	60488-31-5*0
Methylcyclopentane		-68.59	-106.12	± 0.37	kJ/mol	84.1595 ± 0.0049	96-37-7*0
Propadienylidenide		381.17	382.07	± 0.41	kJ/mol	38.0485 ± 0.0024	109292-49-1*0
Dioxosilane		-906.25	-911.24	± 0.83	kJ/mol	60.08430 ± 0.00067	7631-86-9*500
Dioxosilane		-825.81	-901.73	± 0.84	kJ/mol	60.08430 ± 0.00067	7631-86-9*520
Hydroxymethanide		9.5	2.9	± 1.7	kJ/mol	31.03447 ± 0.00088	55830-71-2*0
Silicon carbide cation		1601.3	1605.9	± 2.6	kJ/mol	40.09565 ± 0.00085	78393-58-5*0
1,2-Propadien-1-ylium-1-yl		1561.7	1562.9	± 1.4	kJ/mol	38.0474 ± 0.0024	110714-00-6*0
(Z)-Diazene cation	$[H]/N=[N+]\[H]$	1157.0	1150.1	± 1.3	kJ/mol	30.02881 ± 0.00020	86631-37-0*0
Silyliumyl		1154.75	1153.13	± 0.96	kJ/mol	30.10083 ± 0.00033	28149-31-7*0
Disilanyl anion		62.0	49.6	± 2.2	kJ/mol	61.21125 ± 0.00069	53199-49-8*0
Aquacarbon cation		1196.1	1193.0	± 1.7	kJ/mol	30.02543 ± 0.00087	81434-73-30
Disilene		391.8	383.3	± 2.3	kJ/mol	60.20276 ± 0.00066	15435-77-5*1
Di-mu-hydrodihydrodisilicon		384.0	373.6	± 2.7	kJ/mol	60.20276 ± 0.00066	129970-82-7*22
Trioxidaniumyl		935.2	926.1	± 1.5	kJ/mol	50.01353 ± 0.00091	161321-37-5*3
Formaldehyde		-105.385	-109.226	± 0.096	kJ/mol	30.02598 ± 0.00087	50-00-0*2
Nirous oxide cation		1329.70	1326.80	± 0.12	kJ/mol	44.01233 ± 0.00033	12269-46-4*0
1-Hydrazinylium-1-yl		1143.4	1136.4	± 1.4	kJ/mol	30.02881 ± 0.00020	63986-30-1*0
1-Chloro ozone anion		-109.0	-111.5	± 2.2	kJ/mol	83.4514 ± 0.0013	224299-15-4*3
Dihydrogen fluoride		-55.9	-54.8	± 1.6	kJ/mol	21.01428 ± 0.00014	12592-22-2*1
(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
1-Chloro ozone anion		-66.9	-68.8	± 2.1	kJ/mol	83.4514 ± 0.0013	224299-15-4*1
2-Methyl-2-propanamine		-86.98	-120.63	± 0.55	kJ/mol	73.1369 ± 0.0033	75-64-9*0
Biphenyl		207.0	178.9	± 1.2	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
Helium hydride cation		1350.148	1348.258	± 0.000	kJ/mol	5.009993 ± 0.000070	17009-49-3*0
Krypton hydride cation		1106.33	1104.55	± 0.69	kJ/mol	84.8074 ± 0.1000	37276-90-7*0
Monosulfur cation		1276.48	1278.27	± 0.18	kJ/mol	32.0655 ± 0.0060	14701-12-3*0
Oxosulfur		999.33	999.93	± 0.18	kJ/mol	48.0649 ± 0.0060	767269-11-4*0
Trioxodinitrate anion		-104.2	-107.5	± 1.9	kJ/mol	76.01223 ± 0.00091	194856-62-7*100
Hydrosulfide		-80.51	-80.52	± 0.22	kJ/mol	33.0745 ± 0.0060	15035-72-0*0
Oxadiazirine anion		95.1	95.5	± 2.9	kJ/mol	44.01343 ± 0.00033	350586-31-1*0
Diazenide		347.5	344.6	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*1
Hydrogen sulfate		-942.4	-952.8	± 1.9	kJ/mol	97.0721 ± 0.0061	14996-02-2*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
Hydroxymethylene cation		986.4	982.8	± 1.6	kJ/mol	30.02543 ± 0.00087	135395-06-1*2
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
Methylamine anion		84.2	69.4	± 2.8	kJ/mol	31.05769 ± 0.00088	81096-79-9*0
1-Methylene-2-propenylium		1059.4	1049.3	± 1.7	kJ/mol	53.0820 ± 0.0032	62698-26-4*2
Methyl hydroperoxide cation		833.7	819.7	± 2.0	kJ/mol	48.0407 ± 0.0010	112465-88-0*0
Tribromide		-287.5	-308.5	± 1.9	kJ/mol	239.7125 ± 0.0030	14522-80-6*0
Methoxyoxoniumylidene		1012.69	1003.86	± 0.69	kJ/mol	47.0328 ± 0.0010	86475-50-5*0
1-Methylene-2-propenylium		1256.3	1246.6	± 1.7	kJ/mol	53.0820 ± 0.0032	62698-26-4*1
Dibromine			-2.16	± 0.20	kJ/mol	159.8080 ± 0.0020	7726-95-6*800
Dioxirane anion		-173.0	-179.8	± 3.4	kJ/mol	46.0259 ± 0.0010	157-26-60
Dioxymethyl anion		55.0	49.8	± 1.4	kJ/mol	46.0259 ± 0.0010	93207-29-5*0
Aminomethylene anion		353.0	346.1	± 2.3	kJ/mol	29.04181 ± 0.00083	207914-86-1*0
H-CO2 vdW complex		-178.3	-177.5	± 2.1	kJ/mol	45.0174 ± 0.0010	2564-83-2100
iso-Proplylide		128.8	110.4	± 1.5	kJ/mol	43.0882 ± 0.0024	25012-80-0*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
1,3-Butadienylium		1133.6	1123.6	± 2.5	kJ/mol	53.0820 ± 0.0032	86181-69-3*2
Oxazirinyl cation		1565.5	1566.2	± 2.3	kJ/mol	42.01629 ± 0.00086	228850-18-80
Oxazirinyl anion		448.2	449.0	± 2.4	kJ/mol	42.01739 ± 0.00086	28269-68-3*0
Hydrogen bromide			-120.62	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*952
Hydrogen chloride			-165.976	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*829
Trioxidanylium		1070.4	1064.2	± 1.4	kJ/mol	49.00559 ± 0.00090	74241-49-9*0
Ethyl formate			-426.0	± 1.1	kJ/mol	74.0785 ± 0.0025	109-94-4*500
3-Methanetetrayl-1,2-cyclopropanediylidene		1154.8	1164.3	± 1.9	kJ/mol	48.0428 ± 0.0032	78015-08-4*0
Hydroxyoxoammoniumyl		984.1	977.7	± 1.8	kJ/mol	47.01293 ± 0.00061	80371-48-8*0
Ammonium radical		190.01	179.42	± 0.43	kJ/mol	18.03850 ± 0.00029	92075-50-8*0
Hypofluorous acid anion		155.3	154.7	± 2.6	kJ/mol	36.00629 ± 0.00031	36505-07-4*2
2-Cyclopropyn-1-ylidenemethyl anion		800.9	809.9	± 1.7	kJ/mol	48.0433 ± 0.0032	289679-90-9*0
Chlorine difluoride cation		1346.3	1345.0	± 2.1	kJ/mol	73.44896 ± 0.00090	86825-59-4*0
Fluorosyl fluoride anion		-56.6	-55.7	± 2.4	kJ/mol	53.99675 ± 0.00030	86825-57-21
Propionic acid		-415.5	-433.1	± 1.3	kJ/mol	74.0785 ± 0.0025	79-09-4*2
Cyclopentene			7.05	± 0.51	kJ/mol	68.1170 ± 0.0040	142-29-0*590
Hydroperoxyimidogen		103.4	99.8	± 2.4	kJ/mol	47.01348 ± 0.00061	877456-58-1*1
Carbon		833.337	838.484	± 0.044	kJ/mol	12.01070 ± 0.00080	7440-44-0*2
(1Z)-Ethanimine	$C/C=N\[H]$	58.9	44.2	± 1.4	kJ/mol	43.0678 ± 0.0016	56003-82-8*0
Aminooxy anion		47.3	40.4	± 1.7	kJ/mol	32.02257 ± 0.00034	51375-41-8*0
Cyanogen cation		1598.25	1600.46	± 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
1,2-Propadien-1-yl-3-ylidene anion		621.9	629.3	± 1.3	kJ/mol	36.0326 ± 0.0024	109292-47-9*0
Diazoethenylidene		658.6	661.3	± 1.8	kJ/mol	52.0349 ± 0.0016	130760-10-0*0
Hypofluorous acid cation		1142.04	1139.02	± 0.87	kJ/mol	36.00519 ± 0.00031	90243-22-4*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
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
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
Hydrogen fluoride			-321.13	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*890
Trichloromethylium		856.15	854.63	± 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
Nitric acid cation		1029.19	1020.13	± 0.69	kJ/mol	63.01233 ± 0.00091	272109-63-4*0
Water			-285.797	± 0.025	kJ/mol	18.01528 ± 0.00033	7732-18-5*589
Hypochlorous acid anion		198.7	198.4	± 2.5	kJ/mol	52.46059 ± 0.00095	34524-94-2*0
Methyleneaminylium		1456.6	1453.0	± 2.1	kJ/mol	28.03277 ± 0.00082	53518-13-1*1
Triazirinylium ion		1608.8	1605.9	± 1.6	kJ/mol	42.01967 ± 0.00021	92220-05-8*0
Triazirine		464.1	457.6	± 2.6	kJ/mol	43.02816 ± 0.00022	157-29-9*0
Chlorine difluoride anion		-319.0	-319.0	± 2.2	kJ/mol	73.45005 ± 0.00090	91419-41-9*0
Cyclopropylide		264.8	252.0	± 1.7	kJ/mol	41.0723 ± 0.0024	1724-45-4*0
1,1,1-Trichloroethane		-183.85	-177.20	± 0.52	kJ/mol	133.4033 ± 0.0031	71-55-6*500
Cyclohexene		27.21	-4.26	± 0.32	kJ/mol	82.1436 ± 0.0049	110-83-8*0
Cyclohexene		-21.94	-37.82	± 0.30	kJ/mol	82.1436 ± 0.0049	110-83-8*500
Chloryl chloride		126.1	122.1	± 1.7	kJ/mol	102.9042 ± 0.0019	117489-73-3*0
Fluoronium		774.05	771.11	± 0.91	kJ/mol	21.01373 ± 0.00014	12206-67-6*0
Hydrooxonitrate		78.62	75.71	± 0.99	kJ/mol	31.01463 ± 0.00032	66057-02-1*0
Vinyl chloride		-3.61	0.95	± 0.91	kJ/mol	62.4979 ± 0.0018	75-01-4*500
Imidogen anion		322.62	322.67	± 0.16	kJ/mol	15.015229 ± 0.000099	23841-33-0*0
Hydrogen fluoride			-321.07	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*903
Chloromethane cation		1014.56	1007.80	± 0.16	kJ/mol	50.4867 ± 0.0012	12538-71-5*0
Hydrogen bromide			-120.59	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*841
Isocyanomethylium		1272.9	1270.7	± 2.2	kJ/mol	40.0435 ± 0.0016	78269-43-9*0
Hydrogen fluoride			-321.18	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*891
Tetroxidane		-34.0	-44.5	± 1.8	kJ/mol	66.0135 ± 0.0012	29683-94-1*0
Bromofluoromethane		-197.3	-211.9	± 4.9	kJ/mol	112.9290 ± 0.0013	373-52-4*0
Hydrogen bromide			-120.64	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*842
Fluorodibromomethane		-159.7	-179.2	± 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	-238.2	± 4.9	kJ/mol	181.8185 ± 0.0022	353-58-2*0
Dibromofluorochloromethane		-169.9	-186.8	± 4.9	kJ/mol	226.2698 ± 0.0023	353-55-9*0
Krypton cation		1350.756	1350.756	± 0.000	kJ/mol	83.7995 ± 0.1000	16915-28-9*0
Methylaminilium		1135.1	1125.2	± 2.1	kJ/mol	30.04865 ± 0.00085	49784-84-1*0
1-Propenylidene		630.3	622.8	± 1.7	kJ/mol	40.0639 ± 0.0024	70277-78-0*2
1-Hydroxyethanide		-20.3	-33.7	± 2.2	kJ/mol	45.0610 ± 0.0017	88032-18-2*0
1,2-Difluoroacetylene cation		1081.7	1084.5	± 1.3	kJ/mol	62.0177 ± 0.0016	268566-70-7*0
Difluorophosgene cation		653.47	650.71	± 0.51	kJ/mol	66.00636 ± 0.00085	73256-56-1*0
Deuterium hydride cation		1490.498	1490.587	± 0.000	kJ/mol	3.021493 ± 0.000070	12181-16-7*0
Ammonium chloride		-311.548	-314.710	± 0.063	kJ/mol	53.49120 ± 0.00095	12125-02-9*510
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		119.3	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
Ammonium bromide		-253.64	-270.21	± 0.15	kJ/mol	97.9425 ± 0.0010	12124-97-9*510
2-Chloroethanol			-314.91	± 0.53	kJ/mol	80.5132 ± 0.0019	107-07-3*590
2-Bromoethanol			-274.73	± 0.46	kJ/mol	124.9645 ± 0.0019	540-51-2*590
Fluorosyl fluoride cation		1413.1	1413.5	± 3.5	kJ/mol	53.99566 ± 0.00030	86825-50-51
Phenylium		1148.66	1135.88	± 0.85	kJ/mol	77.1034 ± 0.0048	17333-73-2*2
Chlorosyl chloride cation		1132.6	1130.8	± 2.0	kJ/mol	86.9043 ± 0.0018	86825-56-10
Hydrogen chloride			-165.943	± 0.026	kJ/mol	36.46064 ± 0.00090	7647-01-0*907
Ethanium		888.7	870.3	± 1.8	kJ/mol	31.0764 ± 0.0017	24669-33-8*2
Tribromine		156.0	134.3	± 3.2	kJ/mol	239.7120 ± 0.0030	11094-39-6*0
m-Benzyne anion		444.2	435.3	± 1.3	kJ/mol	76.0965 ± 0.0048	249589-31-9*0
Ethanium		895.1	877.3	± 1.9	kJ/mol	31.0764 ± 0.0017	24669-33-8*3
p-Benzyne anion		465.1	455.5	± 1.3	kJ/mol	76.0965 ± 0.0048	219298-17-6*0
Cycloheptane		-126.63	-156.52	± 0.51	kJ/mol	98.1861 ± 0.0057	291-64-5*500
Tetranitrogen cation		1392.8	1392.5	± 1.5	kJ/mol	56.02641 ± 0.00028	12185-04-5*0
Ethylbenzene			-12.36	± 0.54	kJ/mol	106.1650 ± 0.0064	100-41-4*500
Nitrate			-206.58	± 0.18	kJ/mol	62.00549 ± 0.00090	14797-55-8*800
Phenylacetylene			273.95	± 0.73	kJ/mol	102.1332 ± 0.0064	536-74-3*500
Methylimidogen anion		321.1	313.5	± 1.4	kJ/mol	29.04181 ± 0.00083	82539-34-2*0
Phenyloxoniumylidene		901.5	887.2	± 2.2	kJ/mol	93.1028 ± 0.0048	41071-17-4*0
Anisole		-47.70	-72.55	± 0.79	kJ/mol	108.1378 ± 0.0056	100-66-3*0
Methyliumylamino		1056.1	1049.3	± 1.7	kJ/mol	29.04071 ± 0.00083	65130-65-6*0
Hydrogen chloride			-166.634	± 0.025	kJ/mol	36.46064 ± 0.00090	7647-01-0*840
(Methylmethylene)oxonium		685.8	671.6	± 2.2	kJ/mol	45.0600 ± 0.0017	23653-97-6*0
Fluorobenzene		-151.70	-149.28	± 0.89	kJ/mol	96.1023 ± 0.0048	462-06-6*500
Methoxymethyl anion		23.3	10.3	± 2.3	kJ/mol	45.0610 ± 0.0017	61192-30-1*0
Azanidylmethyl		224.4	217.2	± 2.2	kJ/mol	29.04181 ± 0.00083	127593-73-1*0
Bromobenzene			60.1	± 1.3	kJ/mol	157.0079 ± 0.0049	108-86-1*500
Dinitrogen pentoxide			-41.01	± 0.42	kJ/mol	108.0105 ± 0.0015	10102-03-1*500
Cyanogen bromide anion		57.7	54.1	± 3.8	kJ/mol	105.9220 ± 0.0013	54092-05-6*0
Ozone cation		1352.880	1350.540	± 0.041	kJ/mol	47.99765 ± 0.00090	12596-82-6*0
Hydrogen difluoride cation		1174.3	1171.3	± 1.5	kJ/mol	39.004198 ± 0.000070	126950-54-72
Pyridinium		761.7	740.8	± 1.3	kJ/mol	80.1073 ± 0.0040	16969-45-2*0
Acetone		-244.60	-247.72	± 0.27	kJ/mol	58.0791 ± 0.0025	67-64-1*500
Acetylene anion		380.1	380.3	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*2
2-Hydroxy-2-propenyl		3.9	-9.5	± 1.2	kJ/mol	57.0712 ± 0.0024	742072-56-6*0
Propionaldehyde		-218.03	-216.57	± 0.28	kJ/mol	58.0791 ± 0.0025	123-38-6*500
Ethyl nitrite		-81.37	-98.77	± 0.88	kJ/mol	75.0666 ± 0.0017	109-95-5*0
Acetaldehyde anion		-62.2	-72.4	± 2.2	kJ/mol	44.0531 ± 0.0017	60427-04-5*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		267.61	242.17	± 0.98	kJ/mol	92.1384 ± 0.0056	121-46-0*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
2-Propenylidyne anion		464.6	460.9	± 1.7	kJ/mol	39.0565 ± 0.0024	120126-89-8*0
Acrolein		-46.4	-56.7	± 1.4	kJ/mol	56.0633 ± 0.0024	107-02-8*2
Ethenedione cation		909.5	912.7	± 2.0	kJ/mol	56.0197 ± 0.0017	12541-99-0*0
Diazenium		968.65	957.38	± 0.73	kJ/mol	31.03675 ± 0.00025	37369-93-0*0
2-Cyclopropyn-1-ylidene		993.2	1000.1	± 2.5	kJ/mol	36.0321 ± 0.0024	102508-15-6*2
Hydrogen chloride			-165.543	± 0.027	kJ/mol	36.46064 ± 0.00090	7647-01-0*953
2-Propen-3-yliumylidene		1494.5	1491.5	± 1.7	kJ/mol	39.0554 ± 0.0024	84654-86-4*0
2-Propenylidene anion		536.0	532.6	± 1.7	kJ/mol	39.0565 ± 0.0024	98705-30-7*0
Ethylene anion		231.6	225.5	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*2
Chlorosyl chloride anion		-185.4	-184.7	± 2.3	kJ/mol	86.9053 ± 0.0018	86825-55-00
1-Ethylium-1-yl		1182.0	1174.7	± 3.2	kJ/mol	28.0526 ± 0.0016	85944-79-2*0
3-Imino-2-propen-1-ylidene		532.9	527.9	± 1.8	kJ/mol	53.0627 ± 0.0024	916765-05-4*12
3-Imino-2-propen-1-ylidene		572.6	567.3	± 2.0	kJ/mol	53.0627 ± 0.0024	916765-05-4*22
2-(Methylidyneamino)ethenyl		604.5	599.7	± 1.9	kJ/mol	53.0627 ± 0.0024	123416-74-0*12
2-(Methylidyneamino)ethenyl		637.1	632.3	± 2.0	kJ/mol	53.0627 ± 0.0024	123416-74-0*22
1-Cyanovinylium		1318.3	1317.1	± 2.2	kJ/mol	52.0542 ± 0.0024	85399-09-3*0
Ethylidene anion		325.7	318.3	± 1.8	kJ/mol	28.0537 ± 0.0016	35829-99-3*0
Methanol anion		-89.1	-99.8	± 2.8	kJ/mol	32.04241 ± 0.00090	68474-04-4*0
Tetraoxygen		145.8	142.2	± 3.8	kJ/mol	63.9976 ± 0.0012	12596-83-7*22
Butatriene cation		1210.5	1204.6	± 1.3	kJ/mol	52.0740 ± 0.0032	65513-85-1*0
Peroxychloric acid		76.6	68.4	± 2.5	kJ/mol	100.4582 ± 0.0015	177778-91-5*0
2-Cyclopropyn-1-yl anion		664.8	672.1	± 1.6	kJ/mol	36.0326 ± 0.0024	500574-36-7*0
Bicyclo[1.1.0]but-3-ene		483.2	474.2	± 1.6	kJ/mol	52.0746 ± 0.0032	78525-41-4*0
2-Butynylium		1258.7	1251.4	± 1.6	kJ/mol	53.0820 ± 0.0032	64235-83-2*1
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
Methylammoniumyl		865.95	852.02	± 0.26	kJ/mol	31.05659 ± 0.00088	34516-31-9*0
1-Buten-3-yn-1-yl		547.8	545.0	± 1.2	kJ/mol	51.0666 ± 0.0032	2810-61-9*2
Trifluorine cation		1529.5	1527.4	± 2.3	kJ/mol	56.9946610 ± 0.0000015	64710-22-1*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
Propynylidene		543.50	546.49	± 0.65	kJ/mol	38.0480 ± 0.0024	67152-18-5*0
2-Cyclopropen-1-ylidenemethylium		1346.4	1343.8	± 1.8	kJ/mol	51.0661 ± 0.0032	112936-36-4*2
1,3-Cyclobutadien-1-ylium		1388.3	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		13.0	-6.0	± 2.1	kJ/mol	110.1106 ± 0.0049	36112-26-2*0
Methylcyclopentane		-116.54	-137.90	± 0.36	kJ/mol	84.1595 ± 0.0049	96-37-7*500
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
Dioxosilane		-906.25	-911.24	± 0.83	kJ/mol	60.08430 ± 0.00067	7631-86-9*505
Dioxosilane		-903.55	-908.41	± 0.87	kJ/mol	60.08430 ± 0.00067	7631-86-9*510
Hydrogen chloride			-166.710	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*951
Formaldehyde anion		-26.7	-28.3	± 2.0	kJ/mol	30.02653 ± 0.00087	27837-46-3*0
Oxoethenylium		1139.7	1142.4	± 2.1	kJ/mol	41.0282 ± 0.0016	92056-63-8*0
Silylene anion		166.4	164.7	± 1.4	kJ/mol	30.10193 ± 0.00033	54991-62-7*0
Dioxygen		-0.000	-0.000	± 0.000	kJ/mol	31.99880 ± 0.00060	7782-44-7*1
Silyliumylidene		1134.0	1135.2	± 1.1	kJ/mol	29.09289 ± 0.00031	31241-66-4*0
Hydrogen fluoride			-321.18	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*905
1-Cyclopropene-1,2-diyl		791.1	790.6	± 1.5	kJ/mol	38.0480 ± 0.0024	202744-75-0*0
Hypochlorous acid cation		998.94	995.90	± 0.90	kJ/mol	52.45949 ± 0.00095	71606-47-8*0
Disilene cation		1067.9	1058.9	± 2.1	kJ/mol	60.20221 ± 0.00066	108492-63-3*0
Di-mu-hydrodihydrodisilicon cation		1178.6	1171.0	± 3.3	kJ/mol	60.20221 ± 0.00066	129970-82-71
Di-mu-hydrodihydrodisilicon anion		286.8	278.2	± 3.4	kJ/mol	60.20331 ± 0.00066	129970-83-81
mu-Hydrotrihydrodisilicon		457.7	449.4	± 2.5	kJ/mol	60.20276 ± 0.00066	497967-55-2*1
Dioxodiazoxane		109.4	105.3	± 1.8	kJ/mol	76.01168 ± 0.00091	122413-35-8*2
Nitrosyl nitrate		48.3	40.4	± 1.8	kJ/mol	92.0111 ± 0.0012	15969-55-8*1
Formaldehyde		196.005	192.703	± 0.096	kJ/mol	30.02598 ± 0.00087	50-00-0*1
Aminomethyliumyl		1039.5	1031.9	± 2.3	kJ/mol	29.04071 ± 0.00083	89302-94-3*0
Bromine atom		117.915	111.853	± 0.056	kJ/mol	79.90400 ± 0.00100	10097-32-2*1
Dewar benzene		422.2	405.1	± 1.8	kJ/mol	78.1118 ± 0.0048	5649-95-6*0
Carbon		711.406	716.891	± 0.044	kJ/mol	12.01070 ± 0.00080	7440-44-0*1
1,2-Hexadien-4-yne		407.5	397.4	± 1.7	kJ/mol	78.1118 ± 0.0048	34783-10-3*0
3-Methylene-1-penten-4-yne		362.6	350.0	± 2.2	kJ/mol	78.1118 ± 0.0048	6929-96-0*1
Carbon tetracation		14993.622	14998.769	± 0.053	kJ/mol	12.00851 ± 0.00080	16092-62-9*0
Aminomethyl anion		209.5	199.2	± 2.1	kJ/mol	30.04975 ± 0.00085	74215-21-7*0
Cyclopropenyliumdiyl		1692.1	1695.1	± 1.9	kJ/mol	37.0395 ± 0.0024	127476-05-5*0
3-Methyl-1,4-pentadiyne		439.0	427.6	± 1.6	kJ/mol	78.1118 ± 0.0048	57242-04-3*0
Cyclopropynyl anion		518.11	521.10	± 0.88	kJ/mol	37.0406 ± 0.0024	136861-42-2*0
Nirous oxide anion		99.3	96.7	± 1.9	kJ/mol	44.01343 ± 0.00033	12274-12-3*0
Triiodine cation		946.1	941.0	± 4.1	kJ/mol	380.712861 ± 0.000090	12596-32-6*0
2-Methyl-2-propanamine		-133.08	-150.57	± 0.54	kJ/mol	73.1369 ± 0.0033	75-64-9*500
1,2-Diphenylethane		84.87	51.13	± 0.76	kJ/mol	182.2610 ± 0.0112	103-29-7*500
Anthracene		255.99	226.98	± 0.98	kJ/mol	178.2292 ± 0.0112	120-12-7*0
Anthracene		150.63	124.82	± 0.93	kJ/mol	178.2292 ± 0.0112	120-12-7*500
Hydrogen fluoride			-321.07	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*888
Phenanthrene		136.25	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		334.72	312.77	± 0.94	kJ/mol	178.2292 ± 0.0112	501-65-5*500
Hydroxyimidogen anion		229.8	227.4	± 2.2	kJ/mol	31.01463 ± 0.00032	35337-59-80
Bicyclo[1.1.0]buta-1,1-diene-2,4-diyl		990.4	993.6	± 2.0	kJ/mol	49.0507 ± 0.0032	99417-53-50
Benzoic acid		-274.31	-294.10	± 0.19	kJ/mol	122.1213 ± 0.0056	65-85-0*0
Aminomethyliumylidene		1168.3	1165.1	± 2.2	kJ/mol	28.03277 ± 0.00082	86784-42-1*0
Dihelium		1733.310	1729.576	± 0.018	kJ/mol	8.0052040 ± 0.0000040	12184-98-4*1
Neon hydride cation		1324.81	1322.99	± 0.94	kJ/mol	21.18709 ± 0.00060	12200-65-6*0
Chloroniumyl ion		1137.798	1137.732	± 0.0051	kJ/mol	36.46009 ± 0.00090	12258-94-5*0
Monosulfur anion		76.48	78.54	± 0.18	kJ/mol	32.0665 ± 0.0060	14337-03-2*0
2-Chloro ozone anion		-103.6	-105.9	± 3.2	kJ/mol	83.4514 ± 0.0013	141801-67-40
Thiodioxy		206.8	204.6	± 2.1	kJ/mol	64.0648 ± 0.0060	164034-62-2*0
Sulfur oxide peroxide		-25.9	-30.2	± 2.3	kJ/mol	80.0642 ± 0.0061	175799-68-5*2
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
1,2-Butadienylium		1315.5	1307.4	± 1.7	kJ/mol	53.0820 ± 0.0032	65114-67-21
Dioxymethylidyne cation		1436.6	1439.1	± 2.7	kJ/mol	44.00895 ± 0.00100	791121-04-52
Cyanamide			58.92	± 0.54	kJ/mol	42.04006 ± 0.00082	420-04-2*500
Formyloxidanyl		-125.86	-127.23	± 0.55	kJ/mol	45.0174 ± 0.0010	16499-21-1*0
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
Dioxiranyl		217.3	213.8	± 2.0	kJ/mol	45.0174 ± 0.0010	120595-16-6*0
Hydrochlorate ion		-25.2	-24.2	± 2.5	kJ/mol	36.46119 ± 0.00090	63099-75-2*0
1-Propenylium		1231.9	1221.6	± 1.7	kJ/mol	41.0713 ± 0.0024	50457-58-4*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
1,2-Propadien-1-ylium-1-yl-3-ylidene		1981.5	1989.3	± 2.2	kJ/mol	36.0316 ± 0.0024	118090-85-0*1
1-Propenylide		204.0	192.7	± 1.8	kJ/mol	41.0723 ± 0.0024	65887-20-9*2
Hydroxyoxoammoniumyl		984.1	977.7	± 1.8	kJ/mol	47.01293 ± 0.00061	80371-48-8*1
Cyclopropylium		1104.8	1093.3	± 2.4	kJ/mol	41.0713 ± 0.0024	1724-43-2*0
Ethoxyethane		-266.20	-278.52	± 0.61	kJ/mol	74.1216 ± 0.0033	60-29-7*500
Cyclobutane			3.96	± 0.39	kJ/mol	56.1063 ± 0.0032	287-23-0*590
Methylcyclopropane			1.96	± 0.59	kJ/mol	56.1063 ± 0.0032	594-11-6*590
n-Heptane		-201.43	-223.89	± 0.46	kJ/mol	100.2019 ± 0.0057	142-82-5*500
Poly(vinylchloride)		-84.5	-94.0	± 1.3	kJ/mol	62.4979 ± 0.0018	9002-86-2*500
n-Octane		-226.23	-249.35	± 0.54	kJ/mol	114.2285 ± 0.0065	111-65-9*500
1-Ethenylium-1-yl		1507.1	1507.1	± 2.1	kJ/mol	26.0367 ± 0.0016	80541-07-7*0
1,1-Dichloroethene			-23.45	± 0.51	kJ/mol	96.9427 ± 0.0024	75-35-4*500
Dioxymethylidyne cation		1388.2	1391.7	± 3.2	kJ/mol	44.00895 ± 0.00100	791121-04-5101
n-Nonane		-247.52	-274.39	± 0.49	kJ/mol	128.2551 ± 0.0073	111-84-2*500
n-Decane		-272.68	-300.22	± 0.80	kJ/mol	142.2817 ± 0.0081	124-18-5*500
1,5-Hexadiene			54.59	± 0.32	kJ/mol	82.1436 ± 0.0049	592-42-7*500
Tetraoxidanyl		53.1	46.1	± 5.1	kJ/mol	65.0055 ± 0.0012	69696-93-1*2
Dichloromethane			-122.75	± 0.36	kJ/mol	84.9320 ± 0.0020	75-09-2*590
Nitric acid			-186.80	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*801
Ethynylaminylium		1277.9	1277.5	± 2.6	kJ/mol	40.0435 ± 0.0016	103835-08-1*1
Bromosyl bromide		180.3	164.5	± 2.1	kJ/mol	175.8074 ± 0.0020	68322-97-4*0
Hydrogen fluoride			-321.04	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*887
Bromoniumyl		1097.78	1089.93	± 0.14	kJ/mol	80.9114 ± 0.0010	12258-64-9*0
Tribromofluoromethane		-99.1	-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
Nitric acid			-197.71	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*805
Difluoromethylene anion		-211.12	-209.94	± 0.58	kJ/mol	50.00805 ± 0.00080	66212-40-6*0
Peroxyhypochlorous acid cation		1030.4	1024.6	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-21
Fluoromethylidyne anion		200.8	204.3	± 1.9	kJ/mol	31.00965 ± 0.00080	33412-12-3*0
Trihydrogen		756.931	754.146	± 0.015	kJ/mol	3.02382 ± 0.00021	12184-91-7*2
Oxygen difluoride anion		-202.0	-201.9	± 2.7	kJ/mol	53.99675 ± 0.00030	7783-41-70
Hydrogen fluoride			-321.12	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*904
Hydrogen fluoride			-321.47	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*832
2,4,5-Trioxa-1,3-diazabicyclo[1.1.1]pentane		602.6	593.3	± 2.1	kJ/mol	76.01168 ± 0.00091	224950-18-9*0
Nitric acid trihydrate		-1061.95	-1055.10	± 0.21	kJ/mol	117.0587 ± 0.0019	13444-83-2*500
Difluorovinylidene		129.5	130.7	± 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
Trioxidanyl		25.36	23.27	± 0.13	kJ/mol	49.00614 ± 0.00090	12500-78-6*0
Bromoacetylene		281.6	275.1	± 1.6	kJ/mol	104.9333 ± 0.0019	593-61-3*0
1,3-Butadienylium		1255.9	1246.5	± 2.3	kJ/mol	53.0820 ± 0.0032	86181-69-3*1
Chloro(chlorooxy)methylene		98.	101.	± 15.	kJ/mol	98.9155 ± 0.0020	479587-31-0*11
Nitric acid monohydrate		-479.09	-472.59	± 0.19	kJ/mol	81.0282 ± 0.0012	13444-82-1*500
Chlorooxomethylium		783.7	783.8	± 2.2	kJ/mol	63.4623 ± 0.0012	38264-03-8*0
Tetrazete		764.9	759.0	± 1.8	kJ/mol	56.02696 ± 0.00028	42851-09-2*0
Trioxirane		272.7	270.1	± 1.3	kJ/mol	47.99820 ± 0.00090	153851-84-4*0
2-Iodoethanol			-207.2	± 2.4	kJ/mol	171.9650 ± 0.0017	624-76-0*590
Trioxidane		-81.95	-90.55	± 0.62	kJ/mol	50.01408 ± 0.00091	14699-99-1*0
1,3-Butadiyne cation		1440.19	1442.06	± 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
Hydrogen difluoride cation		1241.	1238.	± 17.	kJ/mol	39.004198 ± 0.000070	126950-54-7*1
Tetraazatetrahedrane		763.7	757.2	± 1.7	kJ/mol	56.02696 ± 0.00028	12596-63-3*0
o-Benzyne		625.7	616.4	± 1.1	kJ/mol	76.0960 ± 0.0048	462-80-6*1
Acetic acid			-484.83	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*839
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
m-Benzyne		527.0	518.6	± 1.2	kJ/mol	76.0960 ± 0.0048	1828-89-3*0
Nitrous acid anion		-105.81	-110.44	± 0.78	kJ/mol	47.01403 ± 0.00061	256393-36-9*2
p-Benzyne cation		1425.0	1417.7	± 2.1	kJ/mol	76.0954 ± 0.0048	121058-09-1*0
p-Benzyne		587.1	577.7	± 1.2	kJ/mol	76.0960 ± 0.0048	3355-34-8*0
Deuterium hydride		0.328	0.319	± 0.000	kJ/mol	3.022042 ± 0.000070	13983-20-5*0
Toluene		19.79	12.03	± 0.32	kJ/mol	92.1384 ± 0.0056	108-88-3*500
Dioxodiazoxane		125.7	120.4	± 2.1	kJ/mol	76.01168 ± 0.00091	122413-35-8*3
Cyclopentadienylium		1088.01	1075.14	± 0.92	kJ/mol	65.0927 ± 0.0040	29661-18-5*0
Carbon dioxide anion		-340.6	-340.1	± 2.2	kJ/mol	44.01005 ± 0.00100	14485-07-5*0
Cycloheptene		-25.2	-46.3	± 1.7	kJ/mol	96.1702 ± 0.0057	628-92-2*500
Hydroxylamine			-97.0	± 2.2	kJ/mol	33.02996 ± 0.00037	7803-49-8*1000
Iodine monochloride		-36.511	-35.537	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*510
Cycloheptatriene		154.10	145.32	± 0.96	kJ/mol	92.1384 ± 0.0056	544-25-2*500
Phenylethene			104.45	± 0.48	kJ/mol	104.1491 ± 0.0064	100-42-5*500
Peroxyhypochlorite		-252.78	-251.75	± 0.34	kJ/mol	67.4520 ± 0.0011	224299-14-3*0
Glycolaldehyde		-292.3	-304.9	± 1.7	kJ/mol	60.0520 ± 0.0017	141-46-8*21
Benzonitrile		161.22	163.58	± 0.91	kJ/mol	103.1213 ± 0.0056	100-47-0*500
Isocyanobenzene		321.0	307.2	± 1.8	kJ/mol	103.1213 ± 0.0056	931-54-4*0
Phenol		-146.45	-162.30	± 0.65	kJ/mol	94.1112 ± 0.0048	108-95-2*500
Isocyanic fluoride		301.1	302.9	± 1.8	kJ/mol	45.01584 ± 0.00080	16992-26-0*0
Glycolaldehyde		-290.6	-303.0	± 1.7	kJ/mol	60.0520 ± 0.0017	141-46-8*31
Glycolaldehyde		-284.0	-296.8	± 1.7	kJ/mol	60.0520 ± 0.0017	141-46-8*22
Anisole			-119.47	± 0.77	kJ/mol	108.1378 ± 0.0056	100-66-3*500
Benzaldehyde		-86.14	-87.21	± 0.95	kJ/mol	106.1219 ± 0.0056	100-52-7*500
Peroxynitrous acid		-5.76	-11.59	± 0.36	kJ/mol	63.01288 ± 0.00091	14691-52-2*0
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			-126.5	± 1.3	kJ/mol	120.1485 ± 0.0064	104-87-0*500
Hydraziniumyl		886.6	873.3	± 2.0	kJ/mol	32.04469 ± 0.00031	20771-51-1*0
1-Propynylium		1547.1	1545.1	± 3.1	kJ/mol	39.0554 ± 0.0024	24858-94-4*0
Chlorodioxidanyl		100.36	99.27	± 0.34	kJ/mol	67.4515 ± 0.0011	17376-09-9*0
o-Tolualdehyde			-119.5	± 1.1	kJ/mol	120.1485 ± 0.0064	529-20-4*500
1-Methyl-1-ethylium-1-yl		1058.2	1045.7	± 1.9	kJ/mol	42.0792 ± 0.0024	121408-19-3*0
Tetraoxodinitrogen cation		1030.7	1025.2	± 2.6	kJ/mol	92.0105 ± 0.0012	64476-91-1*0
Cycloprop-1-enylium		1502.3	1498.0	± 2.2	kJ/mol	39.0554 ± 0.0024	117067-78-4*0
Fluorobenzene anion		-18.2	-30.1	± 1.8	kJ/mol	96.1029 ± 0.0048	34561-55-2*0
Isocyanogen chloride		314.7	316.4	± 2.4	kJ/mol	61.4701 ± 0.0012	75754-69-7*0
m-Chlorophenylium		1160.2	1150.0	± 2.6	kJ/mol	111.5481 ± 0.0049	127983-85-1*0
p-Chlorophenylium		1147.4	1138.0	± 2.5	kJ/mol	111.5481 ± 0.0049	42766-43-8*0
1,3-Butadiynyl anion		677.4	686.5	± 1.1	kJ/mol	48.0433 ± 0.0032	59158-53-1*0
o-Chlorophenylium		1166.7	1157.5	± 2.5	kJ/mol	111.5481 ± 0.0049	137963-70-3*0
Cycloprop-2-enylide		514.9	511.9	± 2.2	kJ/mol	39.0565 ± 0.0024	20829-57-6*0
Hydrogen chloride			-166.102	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*830
Methyl acetate			-445.61	± 0.57	kJ/mol	74.0785 ± 0.0025	79-20-9*500
Iodobenzene cation		1022.93	1007.49	± 0.99	kJ/mol	204.0078 ± 0.0048	38406-85-8*0
Hydrazoic acid cation		1333.63	1327.95	± 0.83	kJ/mol	43.02761 ± 0.00022	58852-14-5*0
Isopropylidene anion		282.4	268.3	± 2.0	kJ/mol	42.0803 ± 0.0024	121408-19-30
Nitrobenzene			6.6	± 1.4	kJ/mol	123.1094 ± 0.0049	98-95-3*500
Hydrogen difluoride cation		1267.6	1265.4	± 4.1	kJ/mol	39.004198 ± 0.000070	126950-54-71
Isocyanogen bromide		341.0	335.3	± 3.5	kJ/mol	105.9214 ± 0.0013	65997-98-0*0
Pyridine		102.26	100.23	± 0.39	kJ/mol	79.0999 ± 0.0040	110-86-1*500
Hydrogen peroxide		-193.099	-187.281	± 0.079	kJ/mol	34.01468 ± 0.00062	7722-84-1*500
Oxygen difluoride cation		1292.14	1289.62	± 0.66	kJ/mol	53.99566 ± 0.00030	39432-25-2*0
Hydrazoic acid anion		309.0	302.7	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*1
Nitromethane		-114.11	-112.93	± 0.43	kJ/mol	61.0401 ± 0.0010	75-52-5*500
Hydrazine		57.31	50.75	± 0.18	kJ/mol	32.04524 ± 0.00031	302-01-2*500
Ammonia anion		94.3	87.3	± 2.4	kJ/mol	17.03111 ± 0.00022	37353-00-7*0
1,3-Propanediyl		320.1	308.2	± 1.6	kJ/mol	42.0797 ± 0.0024	32458-33-6*1
2,2,4-Trimethylpentane		-224.2	-258.6	± 1.5	kJ/mol	114.2285 ± 0.0065	540-84-1*500
cis-1,2-Diiodoethene	$C(\I)=C\I$	217.42	209.14	± 0.35	kJ/mol	279.8462 ± 0.0016	590-26-1*0
trans-1,2-Diiodoethene	$C(\I)=C/I$	215.08	207.69	± 0.35	kJ/mol	279.8462 ± 0.0016	590-27-2*0
Hydroxymethyleneoxonium		792.89	782.76	± 0.66	kJ/mol	47.0328 ± 0.0010	77144-12-8*0
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		-801.9	-824.1	± 2.7	kJ/mol	118.0880 ± 0.0034	110-15-6*0
Bicyclo[1.1.0]buta-1,3-dien-2-yl anion		803.2	810.9	± 1.8	kJ/mol	48.0433 ± 0.0032	289679-89-6*0
1,2-Diiodoethane		87.85	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		-267.76	-273.25	± 0.79	kJ/mol	72.1057 ± 0.0033	78-93-3*500
1-Hydroxy-2-propanone		-340.7	-360.4	± 1.7	kJ/mol	74.0785 ± 0.0025	116-09-6*21
Acrolein			-95.6	± 1.4	kJ/mol	56.0633 ± 0.0024	107-02-8*500
Peroxychlorous acid		102.7	96.9	± 2.4	kJ/mol	84.4588 ± 0.0013	177778-92-6*2
Trifluorine		80.6	81.9	± 2.6	kJ/mol	56.9952096 ± 0.0000015	73455-86-4*0
Ethenedione anion		-149.7	-147.1	± 1.7	kJ/mol	56.0207 ± 0.0017	77783-15-4*0
1-Hydroxy-2-propanone		-338.1	-356.3	± 1.7	kJ/mol	74.0785 ± 0.0025	116-09-6*31
Perchloryl cation		1252.1	1246.4	± 2.5	kJ/mol	83.4504 ± 0.0013	23594-88-9*0
Urea		-317.72	-333.32	± 0.12	kJ/mol	60.05534 ± 0.00091	57-13-6*500
1-Hydroxy-2-propanone		-329.8	-349.7	± 1.7	kJ/mol	74.0785 ± 0.0025	116-09-6*22
Nitrogen atom dianion		1062.8	1064.9	± 2.8	kJ/mol	14.007837 ± 0.000070	16727-21-2*0
Ethyl hydroperoxide			-210.	± 20.	kJ/mol	62.0678 ± 0.0018	3031-74-1*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
Azide			272.58	± 0.48	kJ/mol	42.02077 ± 0.00021	14343-69-2*800
2-Oxo-1-ethylium-1-yl		1289.4	1286.0	± 2.5	kJ/mol	42.0361 ± 0.0016	214464-96-7*11
Nitrosyl nitrite anion		-103.0	-106.2	± 2.8	kJ/mol	76.01223 ± 0.00091	122413-35-81
Acrylonitrile		446.4	440.9	± 1.8	kJ/mol	53.0627 ± 0.0024	107-13-1*2
Acrylonitrile		146.30	153.96	± 0.78	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
Methoxyoxomethyl		-151.6	-160.7	± 1.5	kJ/mol	59.0440 ± 0.0017	16481-04-2*2
1-Isocyanoethylidene		527.9	523.1	± 1.1	kJ/mol	53.0627 ± 0.0024	498544-34-60
Isocyanogen iodide		341.7	342.0	± 4.9	kJ/mol	152.92191 ± 0.00080	66004-32-8*0
Chlorine hydride oxide		163.9	154.0	± 2.4	kJ/mol	84.4588 ± 0.0013	1027055-52-2*0
Isocyanogen iodide anion		123.1	125.2	± 9.3	kJ/mol	152.92246 ± 0.00080	66004-32-80
Methoxymethylene		144.7	134.3	± 1.4	kJ/mol	44.0526 ± 0.0017	19527-10-7*22
Methylamine			-45.21	± 0.44	kJ/mol	31.05714 ± 0.00088	74-89-5*500
Cyclopropenylidene anion		544.3	543.9	± 2.2	kJ/mol	38.0485 ± 0.0024	16165-40-50
Peroxyhypochlorous acid anion		-32.1	-33.9	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-32
Dihydrogen fluoride		-56.5	-54.1	± 1.7	kJ/mol	21.01428 ± 0.00014	12592-22-2*2
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
2-Cyclopropyn-1-ylidenemethyliumyl		2239.9	2247.8	± 2.3	kJ/mol	48.0423 ± 0.0032	289679-92-1*0
2-Hydroxyethenyl		143.8	137.3	± 1.0	kJ/mol	43.0446 ± 0.0016	108665-16-3*11
Vinylvinylidene		690.5	684.4	± 2.7	kJ/mol	52.0746 ± 0.0032	148759-16-4*11
2-Hydroxyethenyl		147.2	140.9	± 1.2	kJ/mol	43.0446 ± 0.0016	108665-16-3*22
Hydronium radical		-18.5	-21.5	± 2.1	kJ/mol	19.02322 ± 0.00037	12168-76-2*100
Dihydrogen cation		1489.060	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*1
2-Hydroxyethenyl		150.6	144.5	± 1.6	kJ/mol	43.0446 ± 0.0016	108665-16-3*12
Chlorine chlorite		177.4	175.1	± 2.2	kJ/mol	102.9042 ± 0.0019	105206-44-8*2
Methanol dimer		-398.5	-419.2	± 1.4	kJ/mol	64.0837 ± 0.0018	42845-44-3*0
1-Buten-3-ynylium		1483.1	1480.5	± 1.7	kJ/mol	51.0661 ± 0.0032	84654-85-3*2
Hydrogen chloride			-166.739	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*842
Dioxiranylidene cation		1409.1	1410.3	± 2.6	kJ/mol	44.00895 ± 0.00100	138832-57-20
Carbon monoxide		465.578	469.285	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*1
Propionic acid		-505.36	-509.50	± 0.18	kJ/mol	74.0785 ± 0.0025	79-09-4*500
2-Cyclopropen-1-ylidenemethylium		1433.1	1429.3	± 1.9	kJ/mol	51.0661 ± 0.0032	112936-36-4*1
Ethylene glycol		-448.63	-455.15	± 0.37	kJ/mol	62.0678 ± 0.0018	107-21-1*500
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
Dihydrogen		1.417	0.019	± 0.000	kJ/mol	2.01588 ± 0.00014	1333-74-0*1
Butyraldehyde		-235.83	-239.35	± 0.84	kJ/mol	72.1057 ± 0.0033	123-72-8*500
Dioxohydrazine		172.94	171.17	± 0.14	kJ/mol	60.01228 ± 0.00062	16824-89-8*2
Disilicon cation		1348.5	1352.1	± 2.7	kJ/mol	56.17045 ± 0.00060	12597-36-3*0
Dioxosilane cation		945.5	945.5	± 2.8	kJ/mol	60.08375 ± 0.00067	59458-81-0*0
Silicate		-478.2	-479.0	± 2.7	kJ/mol	60.08485 ± 0.00067	53095-83-3*0
Oxosilicate		-106.7	-105.5	± 2.6	kJ/mol	44.08545 ± 0.00042	12503-59-2*0
Silicon carbide		-73.0	-74.0	± 1.4	kJ/mol	40.09620 ± 0.00085	409-21-2*502
Silane cation		1104.0	1096.8	± 1.7	kJ/mol	32.11671 ± 0.00041	34826-51-2*0
Hydrogen bromide			-120.49	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*839
Silylium		988.95	983.37	± 0.99	kJ/mol	31.10877 ± 0.00037	41753-67-7*0
Difluorodioxidanium		1283.7	1279.2	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-01
(Z)-Diazene anion	$[H]/N=[N-]\[H]$	280.0	273.3	± 2.0	kJ/mol	30.02991 ± 0.00020	86631-37-00
Oxalic acid		-819.54	-829.63	± 0.42	kJ/mol	90.0349 ± 0.0020	144-62-7*500
Silylidyne anion		247.7	248.9	± 1.1	kJ/mol	29.09399 ± 0.00031	68865-96-3*0
Dimethylamine			-43.32	± 0.37	kJ/mol	45.0837 ± 0.0017	124-40-3*500
Oxobromonium		1139.9	1132.1	± 1.6	kJ/mol	95.9029 ± 0.0010	142315-39-7*0
Disilanylium		980.2	968.8	± 2.6	kJ/mol	61.21015 ± 0.00069	86860-82-4*0
Formic acid		-431.51	-424.68	± 0.20	kJ/mol	46.0254 ± 0.0010	64-18-6*500
1-Disilanylium-1-yl		1122.6	1115.0	± 2.3	kJ/mol	60.20221 ± 0.00066	108492-64-4*0
Di-mu-hydrodihydrodisilicon cation		1192.7	1183.1	± 3.5	kJ/mol	60.20221 ± 0.00066	129970-82-72
Di-mu-hydrodihydrodisilicon anion		295.0	287.5	± 3.5	kJ/mol	60.20331 ± 0.00066	129970-83-82
2-Propen-3-ylium-1-ylidyne		1791.2	1792.7	± 2.6	kJ/mol	38.0474 ± 0.0024	161054-36-0*0
Chloryl ion		1100.26	1097.60	± 0.53	kJ/mol	67.4510 ± 0.0011	25052-55-5*0
Propenediylidene anion		588.8	590.0	± 2.3	kJ/mol	38.0485 ± 0.0024	161054-36-00
Triiodine		153.4	149.4	± 3.6	kJ/mol	380.713410 ± 0.000090	12596-31-5*0
NON anion		495.3	492.8	± 2.5	kJ/mol	44.01343 ± 0.00033	227934-47-60
Oxoethylidene anion		86.9	83.6	± 2.1	kJ/mol	42.0372 ± 0.0016	106543-38-8*1
Paraformaldehyde			-179.2	± 1.6	kJ/mol	30.02598 ± 0.00087	30525-89-4*500
2,4-Hexadiyne		319.06	312.71	± 0.99	kJ/mol	78.1118 ± 0.0048	2809-69-0*500
Isodiazene anion		380.9	374.1	± 2.1	kJ/mol	30.02991 ± 0.00020	63986-30-10
Isoprene			48.95	± 0.69	kJ/mol	68.1170 ± 0.0040	78-79-5*500
Carbon dication		4150.476	4155.622	± 0.044	kJ/mol	12.00960 ± 0.00080	16092-61-8*0
Trimethylenecyclopropane		454.2	441.4	± 1.8	kJ/mol	78.1118 ± 0.0048	3227-90-5*0
3,4-Bis(methylene)cyclobutene		355.5	340.9	± 1.8	kJ/mol	78.1118 ± 0.0048	5291-90-7*0
Aziridine			92.10	± 0.88	kJ/mol	43.0678 ± 0.0016	151-56-4*500
1-Ethynylcyclobutene		402.2	388.0	± 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
Trimethylamine			-48.71	± 0.86	kJ/mol	59.1103 ± 0.0025	75-50-3*500
Dioxygen difluoride		75.1	71.6	± 3.6	kJ/mol	69.99561 ± 0.00060	183051-89-0*0
Acetonitrile			40.62	± 0.22	kJ/mol	41.0520 ± 0.0016	75-05-8*500
1,3-Pentadiyne			385.0	± 5.0	kJ/mol	64.0853 ± 0.0040	4911-55-1*500
Ethylamine			-73.99	± 0.57	kJ/mol	45.0837 ± 0.0017	75-04-7*500
Ethynylene		827.46	834.16	± 0.23	kJ/mol	24.0214 ± 0.0016	12070-15-4*1
1-Propanamine		-93.78	-101.39	± 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
Cyanogen anion		281.5	284.7	± 2.2	kJ/mol	52.0354 ± 0.0016	11118-88-0*0
Dioxiranylidene anion		-110.2	-109.7	± 3.0	kJ/mol	44.01005 ± 0.00100	138832-58-30
Naphthalene		94.65	75.06	± 0.59	kJ/mol	128.1705 ± 0.0080	91-20-3*500
Diisocyanogen cation		1825.3	1828.1	± 3.2	kJ/mol	52.0343 ± 0.0016	78800-21-21
Biphenyl		121.7	97.2	± 1.1	kJ/mol	154.2078 ± 0.0096	92-52-4*500
Biphenyl		121.7	97.2	± 1.1	kJ/mol	154.2078 ± 0.0096	92-52-4*520
Aniline		37.28	31.03	± 0.64	kJ/mol	93.1265 ± 0.0048	62-53-3*500
Oxygen atom hexacation		42035.28	42037.14	± 0.12	kJ/mol	15.99611 ± 0.00030	14158-22-6*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
Xenon hydride cation		1038.14	1036.36	± 0.89	kJ/mol	132.2974 ± 0.0200	37276-91-8*0
Dioxohydrazine		172.94	171.17	± 0.14	kJ/mol	60.01228 ± 0.00062	16824-89-8*0
Pyruvic acid			-588.52	± 0.74	kJ/mol	88.0621 ± 0.0026	127-17-3*500
Carbon dioxide cation		1335.0	1335.5	± 2.4	kJ/mol	44.00895 ± 0.00100	12181-61-2*1
Oxadiazirine cation		1509.9	1507.2	± 2.4	kJ/mol	44.01233 ± 0.00033	227934-45-40
Sulfanylium		1148.48	1148.48	± 0.23	kJ/mol	33.0734 ± 0.0060	12273-42-6*0
Propane cation		974.7	954.6	± 1.7	kJ/mol	44.0951 ± 0.0025	34479-70-4*0
Sulfur hydroxide oxide cation		659.1	648.3	± 3.5	kJ/mol	97.0710 ± 0.0061	12337-07-42
Sulfurous acid		-511.15	-520.65	± 0.90	kJ/mol	82.0801 ± 0.0061	7782-99-2*0
NON cation		1444.0	1444.2	± 2.8	kJ/mol	44.01233 ± 0.00033	227934-46-50
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	± 3.9	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
Carbon monoxide anion		30.0	33.7	± 2.3	kJ/mol	28.01065 ± 0.00085	12539-63-8*0
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
Propylene cation		975.13	961.60	± 0.19	kJ/mol	42.0792 ± 0.0024	34504-10-4*0
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
Hydrogen peroxide cation		931.04	924.18	± 0.98	kJ/mol	34.01413 ± 0.00062	12325-10-9*22
Oxygen atom heptacation		113369.48	113371.34	± 0.12	kJ/mol	15.99556 ± 0.00030	14274-89-6*0
Dihydrogen		-0.000	-0.058	± 0.000	kJ/mol	2.01588 ± 0.00014	1333-74-0*2
Bromomethane		-56.62	-59.64	± 0.17	kJ/mol	94.9385 ± 0.0013	74-83-9*590
Methylene		391.058	391.615	± 0.096	kJ/mol	14.02658 ± 0.00081	2465-56-7*0
Oxoniumyl ion		978.500	975.597	± 0.026	kJ/mol	18.01473 ± 0.00033	56583-62-1*1
Dinitrogen dimer		-0.88	0.84	± 0.67	kJ/mol	56.02696 ± 0.00028	154680-01-0*0
Chlorine atom tetracation		12615.5	12617.1	± 4.6	kJ/mol	35.45051 ± 0.00090	22541-74-8*0
Trihydrogen		215.9	218.3	± 1.1	kJ/mol	3.02382 ± 0.00021	12184-91-7*100
Methyl acetate		-394.15	-413.02	± 0.57	kJ/mol	74.0785 ± 0.0025	79-20-9*0
1-Methylethenyl anion		199.3	188.1	± 2.0	kJ/mol	41.0723 ± 0.0024	65887-19-6*0
1,3-Butadiyne-1,4-diyl		1052.40	1062.37	± 0.65	kJ/mol	48.0428 ± 0.0032	78015-07-3*1
Trihydrogen		745.878	743.094	± 0.062	kJ/mol	3.02382 ± 0.00021	12184-91-7*1
Tribromide			-129.46	± 0.25	kJ/mol	239.7125 ± 0.0030	14522-80-6*800
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 peroxide		-129.411	-135.397	± 0.061	kJ/mol	34.01468 ± 0.00062	7722-84-1*2
Chlorodioxidenium		1215.1	1212.9	± 6.3	kJ/mol	67.4510 ± 0.0011	64710-10-7*0
Trihydrogen cation		1110.304	1106.697	± 0.013	kJ/mol	3.02327 ± 0.00021	28132-48-1*2
3-Methylpentane		-177.59	-201.86	± 0.76	kJ/mol	86.1754 ± 0.0049	96-14-0*500
Hydrazoic acid anion		316.2	310.0	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*2
Isocyanogen bromide anion		104.8	101.6	± 4.6	kJ/mol	105.9220 ± 0.0013	238754-53-50
Methyl formate		-346.94	-359.98	± 0.65	kJ/mol	60.0520 ± 0.0017	107-31-3*0
Cyclopropane cation		1022.3	1006.9	± 1.6	kJ/mol	42.0792 ± 0.0024	34496-93-0*0
Chlorine atom trication		7487.2	7490.2	± 3.3	kJ/mol	35.45105 ± 0.00090	16547-50-5*0
Chlorine trifluoride cation		1053.5	1049.3	± 2.3	kJ/mol	92.44736 ± 0.00090	478167-77-0*0
Ethyl formate		-375.1	-393.9	± 1.0	kJ/mol	74.0785 ± 0.0025	109-94-4*0
Chlorine atom		119.621	121.228	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*1
2,3-Dimethylbutane		-182.39	-206.89	± 0.81	kJ/mol	86.1754 ± 0.0049	79-29-8*500
Acetaldehyde		-187.06	-191.77	± 0.29	kJ/mol	44.0526 ± 0.0017	75-07-0*500
1-Hydroxyethyl		-42.89	-56.32	± 0.47	kJ/mol	45.0605 ± 0.0017	2348-46-1*0
2-Propen-1-ylium-1-ylidene		1373.2	1369.6	± 2.0	kJ/mol	39.0554 ± 0.0024	88000-25-3*0
Fluorine atom pentacation		30617.6	30619.4	± 1.8	kJ/mol	18.99566030 ± 0.00000050	14701-05-4*0
Succinic acid		-918.47	-940.19	± 0.12	kJ/mol	118.0880 ± 0.0034	110-15-6*500
Fluorine atom dication		5132.482	5134.267	± 0.049	kJ/mol	18.99730604 ± 0.00000050	14701-07-6*0
1,2-Dibromoethane			-80.3	± 1.2	kJ/mol	187.8612 ± 0.0026	106-93-4*500
Hydrogen peroxide cation		897.29	890.31	± 0.51	kJ/mol	34.01413 ± 0.00062	12325-10-9*11
Hydrazine monohydrate			-242.56	± 0.19	kJ/mol	50.06052 ± 0.00053	7803-57-8*500
1,3-Butadien-2-ol		-42.7	-59.2	± 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
Hydrazoic acid			257.59	± 0.48	kJ/mol	43.02816 ± 0.00022	7782-79-8*1000
Hydrazoic acid			272.58	± 0.48	kJ/mol	43.02816 ± 0.00022	7782-79-8*800
Acrolein		-55.2	-65.3	± 1.2	kJ/mol	56.0633 ± 0.0024	107-02-8*0
Formylimidogen		245.3	242.1	± 3.3	kJ/mol	43.02478 ± 0.00086	42288-92-6*2
Chlorine atom pentacation		19147.	19149.	± 11.	kJ/mol	35.44996 ± 0.00090	20337-89-7*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
Peroxyhypochlorous acid cation		1050.8	1045.2	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-22
Oxygen atom pentacation		28708.788	28710.645	± 0.053	kJ/mol	15.99666 ± 0.00030	14127-66-3*0
Ethynylaminylium		1350.7	1348.9	± 2.5	kJ/mol	40.0435 ± 0.0016	103835-08-1*2
Ammonium hydroxide			-366.676	± 0.061	kJ/mol	35.04584 ± 0.00047	1336-21-6*1000
Dioxofluorine anion		155.9	154.4	± 2.5	kJ/mol	50.99775 ± 0.00060	175861-93-50
Ethyl bromide		-55.74	-91.27	± 0.26	kJ/mol	108.9651 ± 0.0019	74-96-4*500
Water trimer		-762.63	-776.73	± 0.20	kJ/mol	54.04584 ± 0.00099	31014-12-7*0
(Hydroxyimino)methyl		258.8	252.7	± 2.0	kJ/mol	44.03272 ± 0.00087	206442-92-4*2
Bromodioxy		116.7	107.7	± 3.8	kJ/mol	111.9028 ± 0.0012	67177-47-3*0
2,2-Dimethylbutane		-187.90	-213.62	± 0.75	kJ/mol	86.1754 ± 0.0049	75-83-2*500
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
Vinyl iodide		139.6	130.8	± 1.2	kJ/mol	153.9497 ± 0.0016	593-66-8*0
Cyanoethynylium		1867.6	1874.3	± 3.2	kJ/mol	50.0383 ± 0.0024	104233-69-4*0
Fluorine atom hexacation		45781.5	45783.3	± 1.8	kJ/mol	18.99511172 ± 0.00000050	14701-04-3*0
Oxygen atom trication		10249.929	10252.880	± 0.018	kJ/mol	15.99775 ± 0.00030	14127-64-1*0
Trioxygen difluoride		112.3	107.2	± 1.1	kJ/mol	85.99501 ± 0.00090	16829-28-0*0
1-Propen-1-yl-3-ylidene		656.7	653.3	± 1.1	kJ/mol	39.0559 ± 0.0024	84654-90-0*1
Fluorine atom		77.264	79.049	± 0.047	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*1
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
Tribromine cation		1036.2	1013.6	± 2.5	kJ/mol	239.7115 ± 0.0030	33105-86-1*0
Difluorovinylidene cation		1181.6	1183.1	± 2.3	kJ/mol	62.0177 ± 0.0016	268566-71-8*0
Bicyclo[1.1.0]buta-1,3-diene-2,4-diyl		1047.22	1054.81	± 0.68	kJ/mol	48.0428 ± 0.0032	12184-80-4*2
Hydroxylamine		-33.07	-43.44	± 0.42	kJ/mol	33.02996 ± 0.00037	7803-49-8*0
Acetoxy		-182.22	-190.93	± 0.85	kJ/mol	59.0440 ± 0.0017	13799-69-4*0
Tetraoxodinitrate anion		-184.6	-187.8	± 2.4	kJ/mol	92.0116 ± 0.0012	63552-02-3*0
Hydroxymethylene		112.68	108.93	± 0.27	kJ/mol	30.02598 ± 0.00087	19710-56-6*0
Tetraoxygen		69.8	65.1	± 4.4	kJ/mol	63.9976 ± 0.0012	12596-83-7*21
Tetraoxygen		399.0	393.4	± 3.9	kJ/mol	63.9976 ± 0.0012	12596-83-7*23
Tetraoxygen		465.6	459.6	± 4.2	kJ/mol	63.9976 ± 0.0012	12596-83-7*24
Nitrogen atom dication		4728.995	4731.823	± 0.025	kJ/mol	14.005643 ± 0.000070	17439-59-7*0
Dioxaziridine		277.6	270.9	± 1.9	kJ/mol	47.01348 ± 0.00061	67394-35-8*0
Nitrosyl nitrite anion		-100.2	-103.4	± 2.9	kJ/mol	76.01223 ± 0.00091	122413-35-82
2-Oxo-1-ethylium-1-yl		1292.1	1288.7	± 2.4	kJ/mol	42.0361 ± 0.0016	214464-96-7*12
Iodine monochloride			-24.048	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*590
1,2-Butadien-1-ylium-1-yl		1466.9	1461.7	± 3.1	kJ/mol	52.0740 ± 0.0032	161054-21-3*0
Water		-286.268	-292.709	± 0.025	kJ/mol	18.01528 ± 0.00033	7732-18-5*510
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
Dihydrogen anion		253.8	254.7	± 1.2	kJ/mol	2.01643 ± 0.00014	12184-89-3*0
1,3-Butadiyn-4-ylium-1-yl		2110.0	2120.6	± 2.8	kJ/mol	48.0423 ± 0.0032	124708-46-9*0
Nitride		1879.1	1881.0	± 4.4	kJ/mol	14.008386 ± 0.000070	18851-77-9*0
Acetylene		599.1	598.9	± 1.5	kJ/mol	26.0373 ± 0.0016	74-86-2*11
Hydrogen iodide			-56.828	± 0.089	kJ/mol	127.912410 ± 0.000076	10034-85-2*800
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		559.1	558.4	± 2.2	kJ/mol	51.0672 ± 0.0032	58870-47-6*1
Nitrogen atom pentacation		26226.70	26228.56	± 0.23	kJ/mol	14.003997 ± 0.000070	20508-99-0*0
Hydroxylamine			-107.45	± 0.60	kJ/mol	33.02996 ± 0.00037	7803-49-8*500
Nitrogen atom trication		9306.68	9308.55	± 0.23	kJ/mol	14.005094 ± 0.000070	18396-22-0*0
Trioxodinitrate anion		-87.3	-93.0	± 2.2	kJ/mol	76.01223 ± 0.00091	194856-62-7*1
Carbon monoxide		-113.804	-110.524	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*2
Carbide		2709.6	2714.8	± 2.7	kJ/mol	12.01289 ± 0.00080	12385-15-8*0
Dihydrogen cation		1488.364	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*2
Oxygen atom octacation		197447.75	197449.60	± 0.12	kJ/mol	15.99501 ± 0.00030	21450-98-6*0
Chloro(chlorooxy)methylene		101.1	104.7	± 4.8	kJ/mol	98.9155 ± 0.0020	479587-31-0*12
Nitrogen atom		470.580	472.442	± 0.024	kJ/mol	14.006740 ± 0.000070	17778-88-0*1
Silicon cation		1236.15	1240.27	± 0.58	kJ/mol	28.08495 ± 0.00030	14067-07-3*0
Silicon atom dication		2813.28	2816.26	± 0.58	kJ/mol	28.08440 ± 0.00030	14175-55-4*0
Silicon atom trication		6044.86	6047.84	± 0.58	kJ/mol	28.08385 ± 0.00030	14175-56-5*0
Deuterium molecule cation		1492.286	1492.361	± 0.000	kJ/mol	4.02765497609 ± 0.00000000080	12184-84-8*0
Dioxosilane		-901.0	-905.8	± 1.5	kJ/mol	60.08430 ± 0.00067	7631-86-9*515
Oxosilyliumyl		1021.5	1022.7	± 3.0	kJ/mol	44.08435 ± 0.00042	12359-18-1*0
Ketene		-45.36	-48.42	± 0.11	kJ/mol	42.0367 ± 0.0016	463-51-4*21
Trioxirane cation		1444.5	1442.3	± 2.2	kJ/mol	47.99765 ± 0.00090	153851-84-40
Chlorine atom hexacation		28501.	28503.	± 11.	kJ/mol	35.44941 ± 0.00090	22541-73-7*0
Methylaminyliumyl		1388.3	1381.9	± 2.3	kJ/mol	29.04071 ± 0.00083	56924-51-7*1
2-Hydroxyethylium		1024.5	1012.0	± 2.0	kJ/mol	45.0600 ± 0.0017	38607-31-7*1
mu-Hydrotetrahydrodisilicon cation		980.3	967.5	± 2.9	kJ/mol	61.21015 ± 0.00069	160896-65-1*0
Di-mu-hydrotrihydrodisilicon cation		1032.3	1019.0	± 2.9	kJ/mol	61.21015 ± 0.00069	160896-65-10
Peroxyformate		-320.6	-326.4	± 1.8	kJ/mol	61.0174 ± 0.0012	104960-05-6*2
Disilene anion		176.9	168.5	± 3.1	kJ/mol	60.20331 ± 0.00066	157379-08-3*0
Peroxyformyl		-90.4	-95.8	± 1.8	kJ/mol	61.0168 ± 0.0012	56240-83-6*2
Silylsilylene anion		158.6	149.9	± 3.1	kJ/mol	60.20331 ± 0.00066	286949-98-2*0
Silylsilylene		379.7	370.9	± 2.7	kJ/mol	60.20276 ± 0.00066	50420-90-1*1
mu-Hydrotrihydrodisilicon		316.2	306.1	± 2.2	kJ/mol	60.20276 ± 0.00066	497967-56-3*0
Cyclopentadiene			110.07	± 0.59	kJ/mol	66.1011 ± 0.0040	542-92-7*590
Difluorine cation		1514.301	1514.475	± 0.013	kJ/mol	37.9962578 ± 0.0000010	12184-86-0*0
Nitrogen atom hexacation		79493.10	79494.96	± 0.23	kJ/mol	14.003449 ± 0.000070	15721-56-9*0
mu-Hydrotrihydrodisilicon cation		1158.6	1150.5	± 2.7	kJ/mol	60.20221 ± 0.00066	497967-55-20
Fluorine atom heptacation		63649.3	63651.1	± 1.8	kJ/mol	18.99456314 ± 0.00000050	14700-77-7*0
Formaldehyde		-105.385	-109.225	± 0.096	kJ/mol	30.02598 ± 0.00087	50-00-0*21
Silyloxoniumylidene		1095.4	1089.0	± 2.9	kJ/mol	47.10817 ± 0.00047	152720-17-7*1
Hydroxysilylium		599.4	590.7	± 2.9	kJ/mol	47.10817 ± 0.00047	66639-72-3*0
Hydroxyoxoammoniumyl		1014.8	1008.5	± 2.0	kJ/mol	47.01293 ± 0.00061	80371-48-8*2
Carbon suboxide		-131.3	-116.2	± 1.1	kJ/mol	68.0309 ± 0.0025	504-64-3*500
Polyoxymethylene			-170.85	± 0.21	kJ/mol	30.02598 ± 0.00087	9002-81-7*500
1,5-Hexadiyne			385.9	± 1.9	kJ/mol	78.1118 ± 0.0048	628-16-0*500
Oxonium		605.88	599.13	± 0.17	kJ/mol	19.02267 ± 0.00037	13968-08-6*2
Hydrogen fluoride			-321.15	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*906
Carbon trication		8770.944	8776.090	± 0.050	kJ/mol	12.00905 ± 0.00080	14067-06-2*0
Formaldehyde			-171.20	± 0.59	kJ/mol	30.02598 ± 0.00087	50-00-0*800
1,2-Propadien-1-ylium-1-yl-3-ylidene		1944.6	1952.5	± 1.9	kJ/mol	36.0316 ± 0.0024	118090-85-0*0
Ethynylene		820.23	826.81	± 0.23	kJ/mol	24.0214 ± 0.0016	12070-15-4*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
3-Ethenylidenecyclobutene		406.5	392.4	± 2.3	kJ/mol	78.1118 ± 0.0048	813466-23-8*0
Fluorine atom trication		11182.883	11186.708	± 0.055	kJ/mol	18.99675746 ± 0.00000050	14700-88-0*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
Oxygen atom dication		4949.458	4953.000	± 0.013	kJ/mol	15.99830 ± 0.00030	14127-63-0*0
2-Methylpentane		-180.14	-203.79	± 0.73	kJ/mol	86.1754 ± 0.0049	107-83-5*500
Deuteride		146.991	148.904	± 0.0021	kJ/mol	2.01465035791 ± 0.00000000040	14452-69-8*0
Acetic acid			-484.81	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*833
Difluorodioxidanium		1287.2	1283.0	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-02
Chlorine atom dication		3668.474	3670.081	± 0.013	kJ/mol	35.45160 ± 0.00090	15723-23-6*0
Water		-238.898	-241.801	± 0.025	kJ/mol	18.01528 ± 0.00033	7732-18-5*2
Acetic acid			-484.86	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*850
1,2-Diphenylethane		180.77	142.29	± 0.76	kJ/mol	182.2610 ± 0.0112	103-29-7*0
m-Benzyne		614.7	605.3	± 1.4	kJ/mol	76.0960 ± 0.0048	1828-89-3*1
2-Chloro ozone		265.7	265.1	± 3.7	kJ/mol	83.4509 ± 0.0013	141801-66-30
Isocyanogen cation		1654.1	1656.5	± 1.4	kJ/mol	52.0343 ± 0.0016	133415-63-1*0
Oxoethylidene anion		92.3	89.0	± 2.3	kJ/mol	42.0372 ± 0.0016	106543-38-8*2
Diisocyanogen cation		1838.6	1842.6	± 3.1	kJ/mol	52.0343 ± 0.0016	78800-21-22
Carbon pentacation		52824.606	52829.752	± 0.053	kJ/mol	12.00796 ± 0.00080	14280-11-6*0
Biphenyl			113.8	± 1.1	kJ/mol	154.2078 ± 0.0096	92-52-4*590
Buckminsterfullerene		2524.8	2520.1	± 6.5	kJ/mol	720.6420 ± 0.0480	99685-96-8*0
Buckminsterfullerene		2329.7	2339.1	± 6.5	kJ/mol	720.6420 ± 0.0480	99685-96-8*500
Carbon hexacation		100101.760	100106.907	± 0.053	kJ/mol	12.00741 ± 0.00080	16249-02-8*0
Fluorosyl fluoride		227.	225.	± 21.	kJ/mol	53.99621 ± 0.00030	86825-57-2*2
Cyclobutatrienyl		962.0	965.5	± 2.4	kJ/mol	49.0507 ± 0.0032	99417-52-40
Oxygen atom tetracation		17719.207	17721.064	± 0.025	kJ/mol	15.99721 ± 0.00030	14127-65-2*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
Nitrosyl nitrate		60.4	52.5	± 1.9	kJ/mol	92.0111 ± 0.0012	15969-55-8*2
Helium dihydride		-0.05	0.87	± 0.42	kJ/mol	6.01848 ± 0.00014	33309-42-1*0
Nitrogen atom tetracation		16781.74	16783.60	± 0.23	kJ/mol	14.004546 ± 0.000070	14452-70-1*0
Helium dihydride		614.5	608.9	± 2.6	kJ/mol	6.01848 ± 0.00014	33309-42-10
Dihydrohelium cation		1572.2	1568.9	± 2.4	kJ/mol	6.01793 ± 0.00014	12500-88-80
Neon dication		6032.988	6033.214	± 0.0041	kJ/mol	20.17860 ± 0.00060	14041-55-5*0
Neon trication		12152.403	12152.403	± 0.032	kJ/mol	20.17805 ± 0.00060	14158-25-9*0
Neon tetracation		21529.82	21531.45	± 0.25	kJ/mol	20.17751 ± 0.00060	14041-56-6*0
Neon pentacation		33711.1	33711.1	± 1.2	kJ/mol	20.17696 ± 0.00060	14175-48-5*0
Neon hexacation		48949.3	48949.3	± 1.3	kJ/mol	20.17641 ± 0.00060	14041-57-7*0
Neon heptacation		68948.7	68948.7	± 1.4	kJ/mol	20.17586 ± 0.00060	14175-50-9*0
Neon octacation		92018.2	92018.2	± 1.4	kJ/mol	20.17531 ± 0.00060	14782-26-4*0
Neon nonacation		207396.1	207396.1	± 1.4	kJ/mol	20.17476 ± 0.00060	15721-59-2*0
Hypochloroperoxoous acid, hydroxy ester		48.8	41.8	± 2.5	kJ/mol	84.4588 ± 0.0013	928652-99-7*2
Nitrous acid anion		-105.4	-109.3	± 1.8	kJ/mol	47.01403 ± 0.00061	256393-36-9*1
Dioxofluorine cation		1667.0	1664.8	± 2.8	kJ/mol	50.99665 ± 0.00060	223566-05-0*0
Sulfur atom dication		3528.24	3531.93	± 0.18	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
mu-Oxodichlorate anion		-147.8	-147.7	± 2.5	kJ/mol	86.9053 ± 0.0018	365546-30-1*0
Acetylene anion		356.9	356.7	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*0
Nitrogen atom anion		488.2	490.5	± 2.3	kJ/mol	14.007289 ± 0.000070	17778-87-9*0
Dioxathiirane		167.3	164.9	± 2.3	kJ/mol	64.0648 ± 0.0060	191663-73-7*0
1-Methylethenylium		995.2	986.0	± 1.9	kJ/mol	41.0713 ± 0.0024	50457-57-3*0
Peroxyhypochlorous acid anion		-2.8	-3.3	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-31
Fluorine atom octacation		155686.5	155688.3	± 1.8	kJ/mol	18.99401456 ± 0.00000050	15721-58-1*0
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	± 2.1	kJ/mol	80.1314 ± 0.0120	401811-43-6*0
Fluorine atom tetracation		19594.3	19596.6	± 1.7	kJ/mol	18.99620888 ± 0.00000050	14700-79-9*0
sec-Butylium		792.7	769.0	± 1.6	kJ/mol	57.1137 ± 0.0033	16548-59-7*0
Tropylide		261.4	245.1	± 2.0	kJ/mol	91.1310 ± 0.0056	34464-18-1*0
mu-Oxodichlorine cation		1130.45	1126.84	± 0.63	kJ/mol	86.9043 ± 0.0018	51174-96-0*0
1-Propen-1-yl-3-ylidene		656.7	653.2	± 2.0	kJ/mol	39.0559 ± 0.0024	84654-90-0*12
Methoxyoxomethyl		-151.7	-159.8	± 2.1	kJ/mol	59.0440 ± 0.0017	16481-04-2*3
3-Imino-2-propen-1-ylidene		530.7	526.3	± 1.2	kJ/mol	53.0627 ± 0.0024	916765-05-4*0
Acetone enol		-151.35	-168.16	± 0.69	kJ/mol	58.0791 ± 0.0025	29456-04-0*0
3-Imino-2-propen-1-ylidene		571.8	567.0	± 1.6	kJ/mol	53.0627 ± 0.0024	916765-05-4*2
Methoxymethylene		129.12	118.62	± 0.78	kJ/mol	44.0526 ± 0.0017	19527-10-7*2
Propylidene anion		300.9	286.7	± 3.2	kJ/mol	42.0803 ± 0.0024	121408-55-70
1-Propen-1-yl-3-ylidene		665.8	662.3	± 2.0	kJ/mol	39.0559 ± 0.0024	84654-90-0*13
Acetyloxoniumylidene		892.2	883.8	± 2.9	kJ/mol	59.0435 ± 0.0017	67057-47-0*1
2-(Methylidyneamino)ethenyl		600.7	596.4	± 1.2	kJ/mol	53.0627 ± 0.0024	123416-74-0*0
Acetone enol		-145.3	-162.6	± 1.9	kJ/mol	58.0791 ± 0.0025	29456-04-0*2
2-(Methylidyneamino)ethenyl		634.5	630.4	± 1.6	kJ/mol	53.0627 ± 0.0024	123416-74-0*2
Chloroethane		-134.34	-135.96	± 0.25	kJ/mol	64.5138 ± 0.0019	75-00-3*500
Bromomethane cation		996.21	981.29	± 0.17	kJ/mol	94.9380 ± 0.0013	12538-70-4*0
1-Propen-1-yl-3-ylidene		699.3	696.3	± 3.4	kJ/mol	39.0559 ± 0.0024	84654-90-0*2
Benzoyl anion		69.6	57.0	± 4.0	kJ/mol	105.1145 ± 0.0056	78944-74-8*0
Hydrazine anion		232.3	217.9	± 4.1	kJ/mol	32.04579 ± 0.00031	65391-88-0*0
Difluorovinylidene anion		-88.2	-87.1	± 2.3	kJ/mol	62.0188 ± 0.0016	107693-92-5*0
Cyanic acid anion		-9.2	-9.6	± 3.1	kJ/mol	43.02533 ± 0.00086	58199-47-6*0
Methoxymethylene		129.12	118.62	± 0.78	kJ/mol	44.0526 ± 0.0017	19527-10-7*0
1-Propen-2-ol-1-yl		101.56	90.20	± 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
2-Hydroxyethyl		-13.11	-26.37	± 0.49	kJ/mol	45.0605 ± 0.0017	4422-54-2*0
Chlorine trifluoride anion		-480.3	-481.8	± 3.5	kJ/mol	92.44846 ± 0.00090	184289-50-7*0
Dibromovinylidene		509.9	498.8	± 4.1	kJ/mol	183.8294 ± 0.0026	261771-36-2*0
2-Cyanovinyl		448.0	445.6	± 1.2	kJ/mol	52.0547 ± 0.0024	189141-20-6*0
2-Cyanovinylium		1517.2	1515.2	± 1.8	kJ/mol	52.0542 ± 0.0024	85398-67-0*2
2-Cyanovinyl anion		263.8	261.5	± 1.8	kJ/mol	52.0553 ± 0.0024	85398-67-00
Fluorovinylidene		298.9	300.1	± 3.1	kJ/mol	44.0277 ± 0.0016	70302-00-0*0
1-Propen-2-ol-1-yl		114.0	102.8	± 1.9	kJ/mol	57.0712 ± 0.0024	1976041-84-5*21
2-Isocyanovinyl		543.2	541.8	± 1.7	kJ/mol	52.0547 ± 0.0024	225798-14-1*0
Hydroxyaminylium		1019.5	1012.3	± 2.5	kJ/mol	32.02147 ± 0.00034	66097-71-0*0
Bicyclo[1.1.0]buta-1,3-diene-2,4-diyl		1133.2	1141.0	± 2.7	kJ/mol	48.0428 ± 0.0032	12184-80-4*1
Cyanomethyliumyl		1506.7	1508.2	± 2.3	kJ/mol	39.0355 ± 0.0016	34447-38-6*0
Cyanomethylene anion		286.5	287.0	± 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
Ethylidene		361.26	354.28	± 0.49	kJ/mol	28.0532 ± 0.0016	4218-50-2*0
Nitrosodioxaziridine		413.9	408.1	± 3.2	kJ/mol	76.01168 ± 0.00091	132871-99-9*2
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
Tetraoxidanyl		76.7	69.5	± 6.1	kJ/mol	65.0055 ± 0.0012	69696-93-1*1
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		224.4	230.2	± 3.5	kJ/mol	52.0320 ± 0.0024	109292-50-4*0
1-Propen-2-ol-1-yl		115.1	104.2	± 1.9	kJ/mol	57.0712 ± 0.0024	1976041-84-5*22
Methoxyethene		-89.5	-106.8	± 1.1	kJ/mol	58.0791 ± 0.0025	107-25-5*0
Chlorine pentafluoride cation		1006.0	997.0	± 3.2	kJ/mol	130.44417 ± 0.00090	478167-78-1*0
Chlorovinylidene		429.2	430.9	± 2.9	kJ/mol	60.4820 ± 0.0018	70277-82-6*0
Oxiranylidene		213.5	209.2	± 1.4	kJ/mol	42.0367 ± 0.0016	50983-85-2*0
Peroxyformic acid		-279.21	-288.34	± 0.88	kJ/mol	62.0248 ± 0.0012	107-32-4*0
Isocyanogen bromide cation		1469.7	1464.0	± 5.9	kJ/mol	105.9209 ± 0.0013	238754-53-5*0
Isocyanic fluoride cation		1618.2	1618.8	± 4.0	kJ/mol	45.01529 ± 0.00080	16992-26-00
Nitrous acid anion		-105.81	-109.29	± 0.78	kJ/mol	47.01403 ± 0.00061	256393-36-9*0
Bromovinylidene		466.1	460.1	± 3.8	kJ/mol	104.9333 ± 0.0019	161957-27-3*0
Dinitrogen tetraoxide		-37.82	-26.97	± 0.19	kJ/mol	92.0111 ± 0.0012	10544-72-6*500
1,3-Cyclobutadiene cation		1215.6	1207.3	± 3.0	kJ/mol	52.0740 ± 0.0032	34531-09-4*0
Fluorosyl fluoride anion		-147.1	-146.8	± 3.0	kJ/mol	53.99675 ± 0.00030	86825-57-20
(Formyloxy)methyl		-151.7	-159.8	± 1.1	kJ/mol	59.0440 ± 0.0017	3122-12-1*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
Carboxymethyl		-226.9	-236.8	± 1.1	kJ/mol	59.0440 ± 0.0017	2887-46-9*0
Isocyanic fluoride anion		74.1	75.8	± 5.7	kJ/mol	45.01639 ± 0.00080	357426-78-9*0
2-Hydroxyethenyl		138.01	132.19	± 0.72	kJ/mol	43.0446 ± 0.0016	108665-16-3*0
Dinitrogen anion		192.5	192.5	± 1.7	kJ/mol	28.01403 ± 0.00014	12185-02-3*0
Cyclopropane		41.45	35.77	± 0.52	kJ/mol	42.0797 ± 0.0024	75-19-4*500
1,3-Butadienylium		1133.6	1123.6	± 2.5	kJ/mol	53.0820 ± 0.0032	86181-69-3*0
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
Difluorophosgene anion		-602.3	-604.2	± 3.3	kJ/mol	66.00745 ± 0.00085	474815-26-4*0
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
Ethynylamidogen anion		233.8	230.6	± 3.2	kJ/mol	40.0446 ± 0.0016	64066-03-1*0
Hydrazoic acid anion		309.0	303.1	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*0
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
2-Methoxy-2-oxoethyl		-203.2	-218.4	± 1.5	kJ/mol	73.0706 ± 0.0025	54668-31-4*0
Ethynylaminylium		1277.9	1277.5	± 2.6	kJ/mol	40.0435 ± 0.0016	103835-08-1*0
Fluorosyl fluoride		192.8	193.3	± 2.3	kJ/mol	53.99621 ± 0.00030	86825-57-2*0
Hydrobromate ion		-5.9	-12.4	± 4.3	kJ/mol	80.9125 ± 0.0010	85532-97-4*0
Methyl nitrite		-52.44	-64.40	± 0.89	kJ/mol	61.0401 ± 0.0010	624-91-9*1
2-Propenylidene		417.4	410.5	± 1.5	kJ/mol	40.0639 ± 0.0024	19527-08-3*1
Fluoro(fluorooxy)methylene		-134.8	-136.0	± 1.3	kJ/mol	66.00691 ± 0.00085	479587-30-9*0
Methyl nitrite			-88.79	± 0.56	kJ/mol	61.0401 ± 0.0010	624-91-9*500
1,1-Ethenediol		-296.1	-309.3	± 1.9	kJ/mol	60.0520 ± 0.0017	10375-04-9*3
1,2,3-Butatrien-1-ylium		1271.8	1270.0	± 1.1	kJ/mol	51.0661 ± 0.0032	81932-79-8*0
(Acetyloxy)methyl		-200.4	-214.1	± 1.5	kJ/mol	73.0706 ± 0.0025	2887-49-2*0
1-Methylethylidene		315.98	303.08	± 0.99	kJ/mol	42.0797 ± 0.0024	40852-89-9*0
Ethyl nitrite		-80.3	-98.5	± 1.9	kJ/mol	75.0666 ± 0.0017	109-95-5*2
Nitrosodioxaziridine		413.7	408.2	± 1.8	kJ/mol	76.01168 ± 0.00091	132871-99-9*0
2-Propenylidene		417.4	410.5	± 1.5	kJ/mol	40.0639 ± 0.0024	19527-08-3*0
2-Cyclopropyn-1-ylidene		898.9	905.8	± 1.6	kJ/mol	36.0321 ± 0.0024	102508-15-6*0
1-Buten-3-yn-1-yl		547.26	544.75	± 0.87	kJ/mol	51.0666 ± 0.0032	2810-61-9*0
1-Buten-3-ynylium		1482.3	1480.2	± 1.4	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
Ethyl nitrite		-78.2	-97.2	± 1.9	kJ/mol	75.0666 ± 0.0017	109-95-5*3
Bromine atom		161.999	155.937	± 0.056	kJ/mol	79.90400 ± 0.00100	10097-32-2*2
Iodomethane cation		944.67	935.28	± 0.18	kJ/mol	141.93844 ± 0.00083	12538-72-6*0
Methylaminyliumyl		1423.0	1416.1	± 2.3	kJ/mol	29.04071 ± 0.00083	56924-51-7*2
Propyl nitrite		-96.0	-119.8	± 1.8	kJ/mol	89.0932 ± 0.0025	543-67-9*0
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		326.7	323.6	± 1.4	kJ/mol	51.0672 ± 0.0032	58870-47-6*0
Propyl nitrite		-95.7	-120.3	± 2.5	kJ/mol	89.0932 ± 0.0025	543-67-9*2
2-Propenylidene		419.0	411.5	± 2.3	kJ/mol	40.0639 ± 0.0024	19527-08-3*12
Formic acid cation		721.92	715.38	± 0.25	kJ/mol	46.0248 ± 0.0010	50614-05-6*0
Propyl nitrite		-95.8	-120.4	± 2.5	kJ/mol	89.0932 ± 0.0025	543-67-9*3
3-Methylene-1-cyclopropen-1-ylium		1398.7	1395.4	± 1.7	kJ/mol	51.0661 ± 0.0032	117469-28-0*0
Propyl nitrite		-95.1	-119.6	± 2.5	kJ/mol	89.0932 ± 0.0025	543-67-9*4
Propyl nitrite		-95.0	-119.3	± 2.5	kJ/mol	89.0932 ± 0.0025	543-67-9*5
Phosgene cation		897.0	896.0	± 1.7	kJ/mol	98.9150 ± 0.0020	73249-38-4*0
2-Cyclopropen-1-ylidenemethylium		1346.4	1343.8	± 1.8	kJ/mol	51.0661 ± 0.0032	112936-36-4*0
Water		-286.270	-292.710	± 0.025	kJ/mol	18.01528 ± 0.00033	7732-18-5*509
Phosgene			-242.78	± 0.24	kJ/mol	98.9155 ± 0.0020	75-44-5*501
Phosgene		-255.49	-242.78	± 0.24	kJ/mol	98.9155 ± 0.0020	75-44-5*502
Propyl nitrite		-93.1	-118.1	± 2.5	kJ/mol	89.0932 ± 0.0025	543-67-9*6
1,3-Cyclobutadien-1-ylium		1388.3	1383.3	± 1.9	kJ/mol	51.0661 ± 0.0032	81913-77-1*0
Propyl nitrite		-92.8	-117.9	± 2.5	kJ/mol	89.0932 ± 0.0025	543-67-9*7
Propynylidene		597.7	599.5	± 1.3	kJ/mol	38.0480 ± 0.0024	67152-18-5*2
Chloro(chlorooxy)methylene		73.5	73.9	± 3.6	kJ/mol	98.9155 ± 0.0020	479587-31-0*0
Cyclobutenide		320.3	307.9	± 3.2	kJ/mol	53.0830 ± 0.0032	60211-42-9*0
Chloro(chlorooxy)methylene		98.	105.	± 15.	kJ/mol	98.9155 ± 0.0020	479587-31-0*1
Oxiranylium		901.3	893.3	± 1.4	kJ/mol	43.0441 ± 0.0016	57789-76-1*0
Propyl nitrite		-91.4	-116.3	± 2.8	kJ/mol	89.0932 ± 0.0025	543-67-9*8
Perchloric acid cation		1190.2	1180.6	± 3.3	kJ/mol	100.4577 ± 0.0015	91712-47-9*0
Phenylperoxy cation		1018.3	1001.3	± 3.1	kJ/mol	109.1022 ± 0.0049	956036-17-2*0
Phenylperoxy anion		-39.6	-56.5	± 3.3	kJ/mol	109.1032 ± 0.0049	956036-17-20
Tetraoxidanyl		2.1	0.4	± 2.9	kJ/mol	65.0055 ± 0.0012	69696-93-1*0
1,2-Dibromoethene		121.2	101.0	± 2.0	kJ/mol	185.8453 ± 0.0026	540-49-8*0
Oxiranyl anion		121.4	113.5	± 1.5	kJ/mol	43.0452 ± 0.0016	72722-59-9*0
Diiodine cation		963.523	960.408	± 0.018	kJ/mol	253.808391 ± 0.000060	28712-14-3*0
Trihydrogen		745.878	743.199	± 0.062	kJ/mol	3.02382 ± 0.00021	12184-91-7*0
Fulvene cation		1043.5	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
Propargylenide		434.5	437.7	± 1.1	kJ/mol	38.0485 ± 0.0024	82906-05-6*0
Glycolaldehyde		-304.47	-317.51	± 0.90	kJ/mol	60.0520 ± 0.0017	141-46-8*0
Nitrosyl nitrate		48.3	40.4	± 1.8	kJ/mol	92.0111 ± 0.0012	15969-55-8*0
Water		-238.613	-241.801	± 0.025	kJ/mol	18.01528 ± 0.00033	7732-18-5*1
Fluoroform			-704.58	± 0.42	kJ/mol	70.01385 ± 0.00080	75-46-7*590
Isofulminic acid cation		1376.9	1374.8	± 2.9	kJ/mol	43.02423 ± 0.00086	117800-60-9*0
2,2,4-Trimethylpentane		-171.0	-223.4	± 1.5	kJ/mol	114.2285 ± 0.0065	540-84-1*0
Silicon atom tetracation		10400.38	10403.37	± 0.58	kJ/mol	28.08331 ± 0.00030	22537-24-2*0
Silicon anion		315.56	318.54	± 0.58	kJ/mol	28.08605 ± 0.00030	14337-02-1*0
Formic acid anion		-256.2	-262.3	± 1.8	kJ/mol	46.0259 ± 0.0010	19066-82-1*0
Hydroxymethylene cation		971.9	968.3	± 1.4	kJ/mol	30.02543 ± 0.00087	135395-06-1*0
Disilicon anion		373.7	377.6	± 1.8	kJ/mol	56.17155 ± 0.00060	64236-73-3*0
Peroxychlorous acid		95.4	89.8	± 2.0	kJ/mol	84.4588 ± 0.0013	177778-92-6*0
Iodine monochloride		-36.511	-35.537	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*500
Chlorohydroxymethylene		14.4	11.5	± 3.2	kJ/mol	64.4707 ± 0.0012	147723-60-2*2
Hydrodioxonitrogen cation		1130.2	1123.6	± 3.0	kJ/mol	47.01293 ± 0.00061	252986-76-8*0
Dioxoethylium		688.7	690.0	± 3.0	kJ/mol	57.0276 ± 0.0017	1994332-01-20
Ethanedial anion		-188.6	-190.2	± 3.1	kJ/mol	57.0287 ± 0.0017	1994332-01-2*0
m-Tolualdehyde			-125.7	± 1.3	kJ/mol	120.1485 ± 0.0064	620-23-5*500
Iminomethyl		275.80	272.20	± 0.61	kJ/mol	28.03332 ± 0.00082	15691-95-9*0
Chlorine atom heptacation		39520.	39522.	± 11.	kJ/mol	35.44886 ± 0.00090	22537-27-5*0
Oxonium		605.94	599.13	± 0.17	kJ/mol	19.02267 ± 0.00037	13968-08-6*1
Chlorohydroxymethylene		14.0	11.3	± 2.5	kJ/mol	64.4707 ± 0.0012	147723-60-2*0
Iminomethide		237.4	233.6	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*0
Oxoethylidene		261.1	258.3	± 1.1	kJ/mol	42.0367 ± 0.0016	39920-84-8*0
Silicon carbide anion		509.1	513.7	± 4.4	kJ/mol	40.09675 ± 0.00085	86017-99-4*0
Ketene		-45.24	-48.42	± 0.11	kJ/mol	42.0367 ± 0.0016	463-51-4*22
Chloromethylene		320.37	320.65	± 0.89	kJ/mol	48.4713 ± 0.0012	2108-20-5*0
Hypobromous acid cation		975.16	964.54	± 0.54	kJ/mol	96.9108 ± 0.0010	154804-02-1*0
Silicon carbide		-71.6	-72.6	± 1.4	kJ/mol	40.09620 ± 0.00085	409-21-2*500
Tetrafluorosilane cation		-138.4	-142.7	± 5.9	kJ/mol	104.07856 ± 0.00030	62859-94-3*0
Water anion		-50.1	-53.0	± 4.3	kJ/mol	18.01583 ± 0.00033	12259-30-2*0
(Chlorooxy)methylene		155.5	155.3	± 3.7	kJ/mol	64.4707 ± 0.0012	331419-80-8*1
(Chlorooxy)methylene		119.3	117.9	± 2.7	kJ/mol	64.4707 ± 0.0012	331419-80-8*0
Phenol cation		746.14	727.35	± 0.64	kJ/mol	94.1107 ± 0.0048	40932-22-7*0
Hydroxyoxoethenylium		866.5	865.2	± 3.5	kJ/mol	57.0276 ± 0.0017	1994332-00-10
2-Oxo-1-ethylium-1-yl		1289.4	1286.8	± 2.5	kJ/mol	42.0361 ± 0.0016	214464-96-7*1
Chloroformyl anion		-356.5	-352.9	± 3.3	kJ/mol	63.4633 ± 0.0012	41976-93-6*0
Ethynediolide		-132.8	-134.0	± 3.5	kJ/mol	57.0287 ± 0.0017	1994332-00-1*0
Hydrodioxonitrate		-61.8	-68.2	± 3.2	kJ/mol	47.01403 ± 0.00061	61508-71-2*0
Silylene		270.68	269.01	± 0.86	kJ/mol	30.10138 ± 0.00033	13825-90-6*0
Water dimer cation		556.9	546.4	± 3.0	kJ/mol	36.03001 ± 0.00066	158061-35-9*0
Difluorodioxidanium		1283.7	1280.1	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-00
Methanediol		-379.16	-392.56	± 0.74	kJ/mol	48.0413 ± 0.0010	463-57-0*0
Oxoniumyl ion		978.750	975.599	± 0.026	kJ/mol	18.01473 ± 0.00033	56583-62-1*2
Disilane cation		1028.9	1016.1	± 2.2	kJ/mol	62.21809 ± 0.00073	96301-43-8*0
mu-Oxodioxodinitrogen		984.0	981.1	± 3.2	kJ/mol	76.01113 ± 0.00091	87950-63-8*1
1,3-Butadienyl		372.23	363.00	± 0.87	kJ/mol	53.0825 ± 0.0032	86181-68-2*0
Dioxyamidogen		251.2	244.6	± 2.5	kJ/mol	47.01348 ± 0.00061	71843-95-3*1
Peroxyhypochlorous acid anion		-32.1	-33.9	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-30
Trioxygen difluoride		113.5	107.7	± 2.1	kJ/mol	85.99501 ± 0.00090	16829-28-0*2
1-Hydroxy-2-propanone		-354.56	-373.89	± 0.84	kJ/mol	74.0785 ± 0.0025	116-09-6*0
(Methylamino)methyl anion		201.6	184.7	± 3.1	kJ/mol	44.0763 ± 0.0017	31277-25-50
Nitrogen atom		700.556	702.459	± 0.024	kJ/mol	14.006740 ± 0.000070	17778-88-0*2
Disilene		287.1	278.5	± 1.9	kJ/mol	60.20276 ± 0.00066	15435-77-5*0
Phenol anion		22.8	7.8	± 4.9	kJ/mol	94.1118 ± 0.0048	38752-11-3*0
Carbon		2.390	1.862	± 0.044	kJ/mol	12.01070 ± 0.00080	7440-44-0*501
Propylidyne		492.5	482.8	± 1.2	kJ/mol	41.0718 ± 0.0024	85056-54-8*0
Trihydrogen		254.5	250.7	± 1.2	kJ/mol	3.02382 ± 0.00021	12184-91-7*200
Silylsilylene		315.6	307.8	± 2.0	kJ/mol	60.20276 ± 0.00066	50420-90-1*0
1,1-Dibromoethane			-67.2	± 1.3	kJ/mol	187.8612 ± 0.0026	557-91-5*500
Hydrogen peroxide cation		897.32	890.31	± 0.51	kJ/mol	34.01413 ± 0.00062	12325-10-9*12
Diazene		207.12	199.98	± 0.41	kJ/mol	30.02936 ± 0.00020	3618-05-1*0
Chlorous acid anion		-154.3	-156.1	± 3.3	kJ/mol	68.4600 ± 0.0011	99559-66-7*0
Hydrazoic acid			261.46	± 0.65	kJ/mol	43.02816 ± 0.00022	7782-79-8*500
Isocyanomethane			146.5	± 2.2	kJ/mol	41.0520 ± 0.0016	593-75-9*500
Isoformyl anion		55.7	58.4	± 1.8	kJ/mol	29.01859 ± 0.00086	81747-63-9*0
2-Iodoethanol		-131.9	-150.1	± 2.5	kJ/mol	171.9650 ± 0.0017	624-76-0*0
Di-mu-hydrodihydrodisilicon		373.1	362.8	± 2.4	kJ/mol	60.20276 ± 0.00066	129970-82-7*0
Di-mu-hydrodihydrodisilicon		373.1	362.7	± 2.4	kJ/mol	60.20276 ± 0.00066	129970-82-7*1
Di-mu-hydrodihydrodisilicon		542.6	534.5	± 3.7	kJ/mol	60.20276 ± 0.00066	129970-82-7*11
Di-mu-hydrodihydrodisilicon cation		1178.6	1171.0	± 3.3	kJ/mol	60.20221 ± 0.00066	129970-82-70
Di-mu-hydrodihydrodisilicon anion		286.8	278.7	± 3.4	kJ/mol	60.20331 ± 0.00066	129970-83-80
1-Methylene-2-propenylium		1059.4	1049.3	± 1.7	kJ/mol	53.0820 ± 0.0032	62698-26-4*0
3-Buten-2-one		-95.40	-110.94	± 0.85	kJ/mol	70.0898 ± 0.0032	78-94-4*0
Diazene		207.12	199.98	± 0.41	kJ/mol	30.02936 ± 0.00020	3618-05-1*1
Peroxyformyl		-100.35	-105.45	± 0.92	kJ/mol	61.0168 ± 0.0012	56240-83-6*0
Dicarbon monoxide		377.13	381.17	± 0.83	kJ/mol	40.0208 ± 0.0016	12071-23-7*0
Cyanogen chloride cation		1326.26	1327.59	± 0.97	kJ/mol	61.4696 ± 0.0012	37612-72-9*0
Methoxyethene		-82.2	-99.2	± 2.4	kJ/mol	58.0791 ± 0.0025	107-25-5*1
3-Buten-2-one		-93.8	-109.9	± 1.6	kJ/mol	70.0898 ± 0.0032	78-94-4*2
Carbon		1114.969	1120.116	± 0.044	kJ/mol	12.01070 ± 0.00080	7440-44-0*3
Hypochloroperoxoous acid, hydroxy ester		48.5	41.7	± 1.8	kJ/mol	84.4588 ± 0.0013	928652-99-7*0
Hydrogen peroxide cation		897.29	890.31	± 0.51	kJ/mol	34.01413 ± 0.00062	12325-10-9*0
Formaldehyde		-105.259	-109.225	± 0.096	kJ/mol	30.02598 ± 0.00087	50-00-0*22
Hydrogen peroxide cation		931.06	924.18	± 0.98	kJ/mol	34.01413 ± 0.00062	12325-10-9*21
Peroxyformate		-340.89	-346.34	± 0.95	kJ/mol	61.0174 ± 0.0012	104960-05-6*0
Ethoxyethene		-118.0	-136.5	± 1.5	kJ/mol	72.1057 ± 0.0033	109-92-2*0
1,3-Butadien-2-ol		-48.1	-64.4	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*12
Ethanimine		55.81	41.18	± 0.79	kJ/mol	43.0678 ± 0.0016	20729-41-3*0
Hydroxysilyl anion		-220.1	-227.8	± 2.1	kJ/mol	47.10927 ± 0.00047	78450-47-2*0
Hydroxysilyl anion		-219.8	-227.6	± 2.7	kJ/mol	47.10927 ± 0.00047	78450-47-2*2
Methylaminyliumyl		1388.3	1381.9	± 2.3	kJ/mol	29.04071 ± 0.00083	56924-51-7*0
Trioxidaniumyl		925.5	916.6	± 1.5	kJ/mol	50.01353 ± 0.00091	161321-37-5*0
Chlorine atom		130.176	131.783	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*2
1,3-Butadien-2-ol		-37.9	-54.3	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*22
Benzvalene cation		1200.2	1184.8	± 2.7	kJ/mol	78.1113 ± 0.0048	81050-63-7*0
Imidogen		358.74	358.79	± 0.16	kJ/mol	15.014680 ± 0.000099	13774-92-0*1
Nitrosyl nitrite anion		-103.0	-106.1	± 2.8	kJ/mol	76.01223 ± 0.00091	122413-35-80
Ethoxyethene		-111.5	-135.4	± 2.3	kJ/mol	72.1057 ± 0.0033	109-92-2*21
Ethane anion		41.8	26.6	± 4.4	kJ/mol	30.0696 ± 0.0017	54064-82-3*0
1,3-Butadien-2-ol		-42.7	-58.8	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*2
1,3-Butadienyl		374.9	364.4	± 2.0	kJ/mol	53.0825 ± 0.0032	86181-68-2*12
COC vdW		589.8	598.5	± 1.5	kJ/mol	40.0208 ± 0.0016	12071-24-80
1,2-Propadien-1-yl-3-ylidene anion		621.9	629.3	± 1.3	kJ/mol	36.0326 ± 0.0024	109292-47-9*1
1,3-Butadien-2-ol		-53.4	-68.4	± 1.5	kJ/mol	70.0898 ± 0.0032	59120-04-6*0
Fluoromethane cation		981.83	974.34	± 0.62	kJ/mol	34.03237 ± 0.00083	59122-96-2*0
Cyanomethylium		1256.69	1254.05	± 0.66	kJ/mol	40.0435 ± 0.0016	34430-18-7*0
Butadienylacetylene		358.8	346.3	± 1.9	kJ/mol	78.1118 ± 0.0048	10420-90-3*0
1,3-Butadienyl		384.0	374.5	± 2.0	kJ/mol	53.0825 ± 0.0032	86181-68-2*21
(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
Nitrosodioxaziridine		415.4	409.5	± 2.8	kJ/mol	76.01168 ± 0.00091	132871-99-9*3
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
Cyanogen chloride anion		46.9	51.2	± 3.1	kJ/mol	61.4707 ± 0.0012	12281-43-5*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
Chlorine chlorite		168.6	166.4	± 1.3	kJ/mol	102.9042 ± 0.0019	105206-44-8*0
Propargylallene		432.3	420.7	± 2.2	kJ/mol	78.1118 ± 0.0048	33142-15-3*2
Ethylimidogen anion		277.3	263.5	± 3.6	kJ/mol	43.0684 ± 0.0016	82539-33-1*0
Fluoromethane			-245.73	± 0.45	kJ/mol	34.03292 ± 0.00083	593-53-3*590
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	380.4	± 1.6	kJ/mol	78.1118 ± 0.0048	60239-33-0*0
Isocyanogen chloride cation		1481.0	1482.3	± 3.9	kJ/mol	61.4696 ± 0.0012	956475-91-5*0
1,2,3,5-Hexatetraene		400.5	388.9	± 2.3	kJ/mol	78.1118 ± 0.0048	60239-33-0*2
Cyanic fluoride cation		1294.3	1294.8	± 1.1	kJ/mol	45.01529 ± 0.00080	62532-69-8*0
Bromoform			7.5	± 1.1	kJ/mol	252.7306 ± 0.0031	75-25-2*590
2-Butynylium		1085.8	1077.6	± 1.3	kJ/mol	53.0820 ± 0.0032	64235-83-2*0
Isocyanogen chloride anion		103.0	107.4	± 3.9	kJ/mol	61.4707 ± 0.0012	923019-39-0*0
1,2-Propadien-1-one anion		49.7	48.5	± 3.1	kJ/mol	54.0479 ± 0.0024	159171-62-7*0
Peroxychlorous acid		101.5	95.4	± 3.6	kJ/mol	84.4588 ± 0.0013	177778-92-6*3
Imidogen		509.34	509.39	± 0.17	kJ/mol	15.014680 ± 0.000099	13774-92-0*2
Ethylimidogen cation		1394.6	1381.4	± 3.7	kJ/mol	43.0673 ± 0.0016	82539-33-11
Oxoiodonium		1066.1	1064.1	± 1.9	kJ/mol	142.90332 ± 0.00030	81182-81-2*0
2-Hydroxyethylium		1019.1	1007.0	± 1.5	kJ/mol	45.0600 ± 0.0017	38607-31-7*0
Cyanic fluoride anion		-20.6	-18.6	± 2.9	kJ/mol	45.01639 ± 0.00080	34507-50-1*0
C=O-C cation		1585.8	1592.9	± 2.7	kJ/mol	40.0203 ± 0.0016	83483-98-1*0
1-Oxo-2-propyn-1-ylium		1001.7	1003.1	± 3.0	kJ/mol	53.0389 ± 0.0024	53474-99-0*0
1-Methylallyl		152.58	136.11	± 0.80	kJ/mol	55.0984 ± 0.0032	15819-46-2*0
Diazene cation		1132.49	1125.83	± 0.64	kJ/mol	30.02881 ± 0.00020	76986-17-9*0
Diazene cation		1132.49	1125.55	± 0.64	kJ/mol	30.02881 ± 0.00020	76986-17-9*1
1-Methyl-1-propenyl		239.99	224.61	± 0.67	kJ/mol	55.0984 ± 0.0032	71790-71-1*0
Diatomic bromine cation		1060.32	1045.37	± 0.23	kJ/mol	159.8075 ± 0.0020	12595-71-0*0
1-Methyl-1-propenyl		243.3	227.0	± 1.9	kJ/mol	55.0984 ± 0.0032	71790-71-1*2
(Dimethylamino)methyl anion		190.5	166.2	± 3.3	kJ/mol	58.1029 ± 0.0025	125231-49-4*0
Diazene anion		265.5	258.7	± 2.0	kJ/mol	30.02991 ± 0.00020	100429-75-2*0
1-Butenyl		263.40	246.34	± 0.69	kJ/mol	55.0984 ± 0.0032	2669-61-6*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
1-Butenyl		263.8	246.6	± 1.9	kJ/mol	55.0984 ± 0.0032	2669-61-6*3
Trihydrogen		477.4	474.7	± 2.3	kJ/mol	3.02382 ± 0.00021	12184-91-7*201
Difluoromethane			-468.78	± 0.35	kJ/mol	52.02339 ± 0.00081	75-10-5*590
Acetylide		843.2	849.8	± 3.2	kJ/mol	24.0225 ± 0.0016	34846-56-5*0
Formylethynyl anion		100.4	101.7	± 3.4	kJ/mol	53.0400 ± 0.0024	85905-64-2*0
Hydroxymethylene anion		147.2	144.2	± 1.6	kJ/mol	30.02653 ± 0.00087	207914-87-2*0
Hydroperoxonium		738.2	727.9	± 1.2	kJ/mol	35.02207 ± 0.00064	70850-26-9*0
1,3-Butadienyl		385.5	375.3	± 2.0	kJ/mol	53.0825 ± 0.0032	86181-68-2*22
N-Methylethanamine			-75.1	± 2.3	kJ/mol	59.1103 ± 0.0025	624-78-2*500
Diazene anion		265.5	258.7	± 2.0	kJ/mol	30.02991 ± 0.00020	100429-75-2*1
Dioxohydrazine		192.3	188.7	± 1.8	kJ/mol	60.01228 ± 0.00062	16824-89-8*1
Pentachloroethylium		838.1	836.5	± 3.3	kJ/mol	201.2844 ± 0.0048	7094-17-90
2-Methyl-2-propanamine			-150.57	± 0.54	kJ/mol	73.1369 ± 0.0033	75-64-9*590
2-Cyclopropen-1-one cation		1078.6	1075.5	± 2.0	kJ/mol	54.0468 ± 0.0024	100815-68-7*0
Cyanogen		273.94	289.19	± 0.42	kJ/mol	52.0349 ± 0.0016	460-19-5*500
Nitrato		1290.61	1285.90	± 0.86	kJ/mol	62.00439 ± 0.00090	133057-96-2*0
Naphthalene cation		956.87	933.79	± 0.60	kJ/mol	128.1700 ± 0.0080	34512-27-1*0
Naphthalene anion		187.5	164.7	± 3.0	kJ/mol	128.1711 ± 0.0080	34509-91-6*0
Pentachloroethanide		-281.8	-280.3	± 3.9	kJ/mol	201.2854 ± 0.0048	263019-83-6*0
Cyanogen iodide cation		1271.4	1271.2	± 1.7	kJ/mol	152.92136 ± 0.00080	34749-78-5*0
Fluorine atom nonacation		262121.2	262122.9	± 1.8	kJ/mol	18.99346598 ± 0.00000050	35424-07-8*0
Isocyanogen anion		386.6	388.7	± 3.3	kJ/mol	52.0354 ± 0.0016	83951-85-30
Oxide		651.	653.	± 15.	kJ/mol	16.00050 ± 0.00030	16833-27-5*0
Ethoxyethene		-111.0	-133.2	± 2.6	kJ/mol	72.1057 ± 0.0033	109-92-2*1
Cyanogen bromide cation		1331.1	1324.8	± 1.4	kJ/mol	105.9209 ± 0.0013	34749-77-4*0
Isourea		-156.1	-172.7	± 2.6	kJ/mol	60.05534 ± 0.00091	4744-36-9*0
Diisocyanogen anion		456.8	462.5	± 3.6	kJ/mol	52.0354 ± 0.0016	78800-22-30
1,2-Butadiene		137.79	138.84	± 0.64	kJ/mol	54.0904 ± 0.0032	590-19-2*500
Hydrogen peroxide		-129.391	-135.397	± 0.061	kJ/mol	34.01468 ± 0.00062	7722-84-1*1
O--HH Complex		247.6	248.9	± 2.7	kJ/mol	18.01528 ± 0.00033	7732-18-5101
Formylimidogen		245.2	242.1	± 4.6	kJ/mol	43.02478 ± 0.00086	42288-92-6*1
Carbamoyl anion		-81.9	-87.8	± 3.1	kJ/mol	44.03327 ± 0.00087	78944-69-1*0
Isocyanic acid anion		-54.3	-57.4	± 3.0	kJ/mol	43.02533 ± 0.00086	444010-28-00
Butadiynylium		1781.3	1787.8	± 3.2	kJ/mol	49.0502 ± 0.0032	76108-67-3*0
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
Diisocyanogen cation		1825.3	1828.5	± 3.2	kJ/mol	52.0343 ± 0.0016	78800-21-20
Trihydrogen cation		1110.577	1106.695	± 0.013	kJ/mol	3.02327 ± 0.00021	28132-48-1*1
Chlorine atom dianion		406.6	408.2	± 4.8	kJ/mol	35.45380 ± 0.00090	33944-49-9*0
Carbamoyl		96.3	90.1	± 3.2	kJ/mol	44.03272 ± 0.00087	2858-51-73
Helium		-0.000	-0.000	± 0.000	kJ/mol	4.0026020 ± 0.0000020	7440-59-7*2
Diazoethenylidene cation		1771.2	1773.2	± 3.5	kJ/mol	52.0343 ± 0.0016	130760-10-00
Ethoxyethene		-109.0	-132.2	± 2.3	kJ/mol	72.1057 ± 0.0033	109-92-2*11
Helium dication		7622.839	7622.839	± 0.000	kJ/mol	4.0015048 ± 0.0000020	12587-46-1*0
Carbamoyl		110.9	104.8	± 3.2	kJ/mol	44.03272 ± 0.00087	2858-51-74
1,3-Butadiyne-1,4-diyl		1084.14	1093.95	± 0.84	kJ/mol	48.0428 ± 0.0032	78015-07-3*2
Diazoethenylidene anion		529.7	532.3	± 3.5	kJ/mol	52.0354 ± 0.0016	130760-11-10
Cyclopropylidene		474.92	466.90	± 0.85	kJ/mol	40.0639 ± 0.0024	2143-70-6*0
(Hydroxyimino)methyl		250.1	244.3	± 1.8	kJ/mol	44.03272 ± 0.00087	206442-92-4*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
Dioxodiazoxane		93.0	88.2	± 1.3	kJ/mol	76.01168 ± 0.00091	122413-35-8*0
Hydrohelate		143.256	139.027	± 0.0021	kJ/mol	5.011091 ± 0.000070	12325-01-8*0
Oxoethylidene anion		86.9	84.2	± 2.1	kJ/mol	42.0372 ± 0.0016	106543-38-8*0
(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
Ethenol		-113.37	-123.72	± 0.38	kJ/mol	44.0526 ± 0.0017	557-75-5*0
Dioxymethylene		341.8	339.8	± 3.0	kJ/mol	45.0174 ± 0.0010	438586-67-5*0
1,2-Butadienylium		1099.2	1089.8	± 1.2	kJ/mol	53.0820 ± 0.0032	65114-67-20
Vinyl alcohol cation		778.6	767.6	± 1.3	kJ/mol	44.0520 ± 0.0017	57239-63-1*0
Dichlorovinylidene		424.3	427.5	± 3.0	kJ/mol	94.9268 ± 0.0024	20394-25-6*0
Chlorohydroxymethyl		-54.9	-60.6	± 1.1	kJ/mol	65.4787 ± 0.0012	147139-06-8*0
Chlorine pentafluoride anion		-619.1	-622.5	± 4.3	kJ/mol	130.44526 ± 0.00090	184851-42-1*0
Formaldoxime		30.5	19.9	± 1.3	kJ/mol	45.04066 ± 0.00088	75-17-2*0
2-Propene-1,2-diol		-295.5	-314.5	± 1.2	kJ/mol	74.0785 ± 0.0025	44169-27-9*0
Hydrogen peroxide			-190.69	± 0.30	kJ/mol	34.01468 ± 0.00062	7722-84-1*800
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
3H-diazirin-3-ylidene-methylene		837.3	839.9	± 2.3	kJ/mol	52.0349 ± 0.0016	204253-88-3*0
Hydroneonate		143.096	142.084	± 0.035	kJ/mol	21.18819 ± 0.00060	75514-98-6*0
Hydroperoxonium		762.5	752.7	± 2.0	kJ/mol	35.02207 ± 0.00064	70850-26-9*2
Benzaldehyde cation		896.4	879.7	± 1.8	kJ/mol	106.1214 ± 0.0056	80226-59-1*0
Krypton dication		3701.124	3701.124	± 0.013	kJ/mol	83.7989 ± 0.1000	18469-91-5*0
Oxirene		273.19	271.03	± 0.92	kJ/mol	42.0367 ± 0.0016	157-18-6*0
Xenon dication		3194.14	3194.14	± 0.36	kJ/mol	131.2889 ± 0.0200	14066-95-6*0
Hydrogen isocyanide anion		191.60	191.78	± 0.33	kJ/mol	27.02593 ± 0.00081	96913-22-3*0
Cyanic acid cation		1135.7	1133.2	± 2.9	kJ/mol	43.02423 ± 0.00086	59780-31-3*0
Fluorosyl fluoride cation		1413.1	1413.5	± 3.5	kJ/mol	53.99566 ± 0.00030	86825-50-50
1-Hydroxyethylidene		57.35	47.04	± 0.78	kJ/mol	44.0526 ± 0.0017	30967-49-8*2
Oxirene		387.9	384.5	± 1.4	kJ/mol	42.0367 ± 0.0016	157-18-6*1
Chlorous acid cation		996.6	991.6	± 3.1	kJ/mol	68.4589 ± 0.0011	99559-66-70
Ethylene anion		232.0	225.6	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*0
1-Hydroxyethylidene		57.35	47.04	± 0.78	kJ/mol	44.0526 ± 0.0017	30967-49-8*0
Pyridiniumyl		1051.35	1035.40	± 0.61	kJ/mol	79.0994 ± 0.0040	16399-94-3*0
Sulfur atom hexacation		26947.2	26949.0	± 3.4	kJ/mol	32.0627 ± 0.0060	22537-26-4*0
Hydroperoxyimidogen		111.9	109.0	± 2.8	kJ/mol	47.01348 ± 0.00061	877456-58-1*2
Sulfur atom dianion		454.1	455.9	± 3.2	kJ/mol	32.0671 ± 0.0060	18496-25-8*0
Dichlorine cation		1108.307	1108.286	± 0.0062	kJ/mol	70.9049 ± 0.0018	12595-90-3*0
Disulfur cation		1030.22	1030.81	± 0.40	kJ/mol	64.1315 ± 0.0120	12597-02-3*0
Disulfur anion		-34.0	-33.1	± 1.3	kJ/mol	64.1325 ± 0.0120	12185-15-8*0
Difluorodioxidane anion		-251.	-251.	± 28.	kJ/mol	69.99615 ± 0.00060	7783-45-10
Pyridine anion		214.4	200.9	± 3.2	kJ/mol	79.1005 ± 0.0040	12169-63-0*0
Diazenide		175.6	176.7	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*0
Sulfonyl cation		897.07	894.80	± 0.18	kJ/mol	64.0643 ± 0.0060	12439-77-9*0
Carbon dianion		1027.5	1033.0	± 4.9	kJ/mol	12.01180 ± 0.00080	50802-47-6*0
Benzaldehyde anion		-55.7	-73.3	± 2.7	kJ/mol	106.1225 ± 0.0056	34473-57-9*0
Carbonylmethyloxonium		561.3	553.1	± 3.1	kJ/mol	59.0435 ± 0.0017	24434-00-2*0
Chloromethane		-106.51	-102.54	± 0.16	kJ/mol	50.4872 ± 0.0012	74-87-3*590
Oxosulfate		-102.59	-101.83	± 0.51	kJ/mol	48.0659 ± 0.0060	12269-52-2*0
1,2-Difluoroethene		-302.81	-308.90	± 0.90	kJ/mol	64.0341 ± 0.0016	1691-13-0*0
Sulfur trioxide cation		847.67	844.77	± 0.70	kJ/mol	80.0637 ± 0.0061	12710-95-1*0
Ethynol cation		1063.8	1061.2	± 2.9	kJ/mol	42.0361 ± 0.0016	84005-02-7*0
Sulfite		-275.1	-280.6	± 4.4	kJ/mol	80.0653 ± 0.0061	14265-45-3*0
Sulfur oxide peroxide		-25.9	-30.2	± 2.3	kJ/mol	80.0642 ± 0.0061	175799-68-5*0
Hydroxyformyl		-181.19	-183.74	± 0.42	kJ/mol	45.0174 ± 0.0010	2564-86-5*0
Sulfur oxide peroxide		-3.4	-7.0	± 3.0	kJ/mol	80.0642 ± 0.0061	175799-68-5*1
Hydrogen cyanide anion		129.515	129.037	± 0.089	kJ/mol	27.02593 ± 0.00081	12334-27-9*0
Diazanide		249.3	239.3	± 3.1	kJ/mol	31.03785 ± 0.00025	25415-88-7*0
O--HH Complex		247.2	248.2	± 2.0	kJ/mol	18.01528 ± 0.00033	7732-18-5102
Disulfur oxide cation		970.66	969.37	± 0.65	kJ/mol	80.1309 ± 0.0120	135758-60-0*0
Oxothioxosulfate		-231.83	-233.43	± 0.90	kJ/mol	80.1319 ± 0.0120	12143-07-6*0
1-Cyanoethylidene		437.5	433.8	± 1.5	kJ/mol	53.0627 ± 0.0024	498544-34-6*0
1-Propen-1-yl-3-ylidene		656.7	653.3	± 1.1	kJ/mol	39.0559 ± 0.0024	84654-90-0*0
Sulfoniumyl		992.68	989.77	± 0.21	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
Carbon trianion		1813.2	1818.6	± 5.9	kJ/mol	12.01235 ± 0.00080	50802-48-7*0
Cyclopentadienide		100.5	87.5	± 1.1	kJ/mol	65.0937 ± 0.0040	12127-83-2*0
Ethynol anion		163.5	165.0	± 3.3	kJ/mol	42.0372 ± 0.0016	864971-50-6*0
Ethynol		95.29	92.80	± 0.78	kJ/mol	42.0367 ± 0.0016	32038-79-2*0
Sulfuric acid cation		401.4	388.4	± 3.3	kJ/mol	98.0789 ± 0.0061	247933-66-0*0
1,2-Dichloroethene		3.81	-1.51	± 0.55	kJ/mol	96.9427 ± 0.0024	540-59-0*0
1,1-Ethenediol		-307.66	-320.19	± 0.83	kJ/mol	60.0520 ± 0.0017	10375-04-9*0
Ethynol		406.4	403.2	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*12
Sulfur hydroxide oxide		-473.9	-482.9	± 1.7	kJ/mol	97.0715 ± 0.0061	12337-07-4*0
Sulfur hydroxide oxide		-473.1	-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		663.7	652.7	± 4.0	kJ/mol	97.0710 ± 0.0061	12337-07-41
Trioxodinitrate anion		-104.2	-107.4	± 1.9	kJ/mol	76.01223 ± 0.00091	194856-62-7*0
Fluorine atom		82.099	83.884	± 0.047	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*2
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
Sulfonic acid		-482.1	-494.6	± 1.4	kJ/mol	82.0801 ± 0.0061	7782-99-20
Water		-286.270	-285.797	± 0.025	kJ/mol	18.01528 ± 0.00033	7732-18-5*499
Bisulfite cation		556.0	547.3	± 3.2	kJ/mol	81.0716 ± 0.0061	43637-78-1*0
Ethynol		409.4	406.3	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*13
trans-Cycloheptene		141.8	103.8	± 1.9	kJ/mol	96.1702 ± 0.0057	45509-99-7*0
Ethynol		455.5	452.2	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*14
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
Dichloromethylene		229.89	231.07	± 0.64	kJ/mol	82.9161 ± 0.0020	1605-72-7*0
Platinum dimer cation		1661.0	1659.6	± 4.3	kJ/mol	390.1555 ± 0.0040	73146-08-4*0
Platinum dimer anion		640.3	639.8	± 3.9	kJ/mol	390.1565 ± 0.0040	153298-77-2*0
Oxonium			-285.796	± 0.025	kJ/mol	19.02267 ± 0.00037	13968-08-6*800
Platinum hydride cation		1336.	1355.	± 22.	kJ/mol	196.0854 ± 0.0020	87882-39-1*0
1-Methoxyethenol		-284.3	-302.8	± 1.2	kJ/mol	74.0785 ± 0.0025	4453-91-2*0
Hydrogen atom		-37.0	-40.2	± 1.1	kJ/mol	1.007940 ± 0.000070	12385-13-6*1001000
Hydroxyformyl anion		-319.55	-321.41	± 0.57	kJ/mol	45.0180 ± 0.0010	78944-70-4*0
Hydroxyamidogen		101.26	94.43	± 0.80	kJ/mol	32.02202 ± 0.00034	13940-32-4*0
1,1-Ethenediol		-302.4	-315.8	± 1.9	kJ/mol	60.0520 ± 0.0017	10375-04-9*2
Aminomethylidyne anion		481.6	478.1	± 3.2	kJ/mol	28.03387 ± 0.00082	96808-04-7*1
Hydrogen atom		-32.	-34.	± 20.	kJ/mol	1.007940 ± 0.000070	12385-13-6*1002000
Nitrogen atom heptacation		143853.26	143855.13	± 0.23	kJ/mol	14.002900 ± 0.000070	40549-08-4*0
Peroxyhypochlorous acid cation		1030.4	1024.6	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-20
Methane anion		27.3	19.4	± 5.1	kJ/mol	16.04301 ± 0.00085	27680-53-1*0
Ethynol		464.1	460.9	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*15
Nitrogen sesquioxide cation		1027.7	1023.7	± 4.8	kJ/mol	76.01113 ± 0.00091	10544-73-70
Methoxyoxomethyl		-152.6	-160.3	± 1.3	kJ/mol	59.0440 ± 0.0017	16481-04-2*0
Argon cation		1520.571	1520.580	± 0.000	kJ/mol	39.94745 ± 0.00100	14791-69-6*0
Argon dimer cation		1393.760	1391.173	± 0.018	kJ/mol	79.8955 ± 0.0020	17596-58-6*0
Argon atom dication		4186.429	4186.468	± 0.013	kJ/mol	39.94690 ± 0.00100	15056-24-3*0
Argon dimer		-1.013	-6.347	± 0.0051	kJ/mol	79.8960 ± 0.0020	12595-59-4*0
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
Argon anion		23.	23.	± 75.	kJ/mol	39.94855 ± 0.00100	16544-90-4*1
Argon anion		23.	23.	± 75.	kJ/mol	39.94855 ± 0.00100	16544-90-4*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	± 0.098	kJ/mol	39.94855 ± 0.00100	16544-90-4*2
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. 1.122v of the Thermochemical Network, Argonne National Laboratory, Lemont, Illinois 2022; available at ATcT.anl.gov [DOI: 10.17038/CSE/1885921]
4		D. H. Bross, H.-G. Yu, L. B. Harding, and B. Ruscic, Active Thermochemical Tables: The Partition Function of Hydroxymethyl (CH2OH) Revisited. J. Phys. Chem. A 123, 4212-4231 (2019) [DOI: 10.1021/acs.jpca.9b02295]
5		D. P. Zaleski, R. Sivaramakrishnan, H. R. Weller, N. A Seifert, D. H. Bross, B. Ruscic, K. B. Moore III, S. N. Elliott, A. V. Copan, L. B. Harding, S. J. Klippenstein, R. W. Field, and K. Prozument, Substitution Reactions in the Pyrolysis of Acetone Revealed through a Modeling, Experiment, Theory Paradigm. J. Am. Chem. Soc. 143, 3124-3152 (2021) [DOI: 10.1021/jacs.0c11677]
6		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]
7		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 [6, 7]).
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.