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

Below is a list of 0 K and 298.15 K enthalpies of formation for all 1604 species included in version 1.122e (as of 09/05/2016).
This version of ATcT results was generated from an expansion of version 1.122d [4] to include chemical species related to methyl acetate and methyl formate [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.)

If you find Active Thermochemical Tables useful in your research, please cite this website as given in Ref. [3], and, if possible, the ATcT approach as given in Refs. [1] and [2].

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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 atom		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
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
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 atom		711.401	716.886	± 0.048	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
Nitrogen atom		470.579	472.442	± 0.024	kJ/mol	14.006740 ± 0.000070	17778-88-0*0
Carbon dioxide		-393.108	-393.474	± 0.015	kJ/mol	44.00950 ± 0.00100	124-38-9*0
Chlorine atom		119.621	121.302	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*0
Fluorine atom		77.255	79.361	± 0.048	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*0
Methane		-66.557	-74.526	± 0.056	kJ/mol	16.04246 ± 0.00085	74-82-8*0
Water		-286.301	-285.829	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*500
Ethane		-68.34	-83.97	± 0.13	kJ/mol	30.0690 ± 0.0017	74-84-0*0
Water		-238.931	-241.835	± 0.027	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
Ethylene		60.88	52.36	± 0.12	kJ/mol	28.0532 ± 0.0016	74-85-1*0
Bromine atom		117.914	111.851	± 0.056	kJ/mol	79.90400 ± 0.00100	10097-32-2*0
Methanol		-190.06	-200.95	± 0.16	kJ/mol	32.04186 ± 0.00090	67-56-1*0
Hydrogen chloride		-91.989	-92.173	± 0.0062	kJ/mol	36.46064 ± 0.00090	7647-01-0*0
Hydroxyl		37.249	37.489	± 0.027	kJ/mol	17.00734 ± 0.00031	3352-57-6*0
Carbon monoxide		-113.803	-110.523	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*0
Methyl		149.860	146.446	± 0.075	kJ/mol	15.03452 ± 0.00083	2229-07-4*0
Formaldehyde		-105.382	-109.221	± 0.098	kJ/mol	30.02598 ± 0.00087	50-00-0*0
Propane		-82.73	-105.01	± 0.18	kJ/mol	44.0956 ± 0.0025	74-98-6*0
Hydrogen fluoride		-272.677	-272.724	± 0.049	kJ/mol	20.006343 ± 0.000070	7664-39-3*0
Hydrogen bromide		-27.98	-35.83	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*0
Iodine atom		107.157	106.757	± 0.0021	kJ/mol	126.904470 ± 0.000030	14362-44-8*0
Ethyl		131.05	119.99	± 0.27	kJ/mol	29.0611 ± 0.0016	2025-56-1*0
Ethanol		-217.25	-234.97	± 0.22	kJ/mol	46.0684 ± 0.0017	64-17-5*0
Acetylene		228.82	228.26	± 0.13	kJ/mol	26.0373 ± 0.0016	74-86-2*0
Nitric oxide		90.619	91.123	± 0.065	kJ/mol	30.00614 ± 0.00031	10102-43-9*0
Chloromethane		-74.66	-82.60	± 0.20	kJ/mol	50.4872 ± 0.0012	74-87-3*0
Hydrogen cyanide		129.661	129.277	± 0.090	kJ/mol	27.02538 ± 0.00081	74-90-8*0
Ammonia		-38.565	-45.557	± 0.030	kJ/mol	17.03056 ± 0.00022	7664-41-7*0
Propene		34.94	19.94	± 0.21	kJ/mol	42.0797 ± 0.0024	115-07-1*0
Nitrogen dioxide		36.859	34.052	± 0.065	kJ/mol	46.00554 ± 0.00060	10102-44-0*0
Hydroxyde		-139.092	-139.059	± 0.027	kJ/mol	17.00789 ± 0.00031	14280-30-9*0
Dioxidanyl		15.13	12.22	± 0.15	kJ/mol	33.00674 ± 0.00060	3170-83-0*0
Hydrogen iodide		28.645	26.469	± 0.036	kJ/mol	127.912410 ± 0.000076	10034-85-2*0
Fluoromethane		-227.45	-235.48	± 0.24	kJ/mol	34.03292 ± 0.00083	593-53-3*0
Acetaldehyde		-155.14	-165.61	± 0.26	kJ/mol	44.0526 ± 0.0017	75-07-0*0
Hydrogen peroxide		-129.478	-135.464	± 0.063	kJ/mol	34.01468 ± 0.00062	7722-84-1*0
Bromomethane		-20.94	-36.34	± 0.18	kJ/mol	94.9385 ± 0.0013	74-83-9*0
n-Butane		-98.46	-125.77	± 0.26	kJ/mol	58.1222 ± 0.0033	106-97-8*0
Benzene		100.62	83.11	± 0.23	kJ/mol	78.1118 ± 0.0048	71-43-2*0
Methylene		428.72	429.14	± 0.11	kJ/mol	14.02658 ± 0.00081	2465-56-7*2
Hypochlorous acid		-73.868	-76.808	± 0.028	kJ/mol	52.46004 ± 0.00095	7790-92-3*0
Propyne		192.79	185.74	± 0.24	kJ/mol	40.0639 ± 0.0024	74-99-7*0
Dibromine		45.67	30.88	± 0.11	kJ/mol	159.8080 ± 0.0020	7726-95-6*0
Methylene		391.063	391.621	± 0.099	kJ/mol	14.02658 ± 0.00081	2465-56-7*1
Formic acid		-371.08	-378.40	± 0.22	kJ/mol	46.0254 ± 0.0010	64-18-6*1
Fluoride		-250.909	-249.125	± 0.048	kJ/mol	18.99895178 ± 0.00000050	16984-48-8*0
Diiodine		65.497	62.417	± 0.0041	kJ/mol	253.808940 ± 0.000060	7553-56-2*0
Ketene		-45.35	-48.46	± 0.12	kJ/mol	42.0367 ± 0.0016	463-51-4*0
Tetrachloromethane		-93.48	-95.65	± 0.44	kJ/mol	153.8215 ± 0.0037	56-23-5*0
Chloroethane		-96.89	-111.48	± 0.26	kJ/mol	64.5138 ± 0.0019	75-00-3*0
Tetrafluoromethane		-927.45	-933.42	± 0.25	kJ/mol	88.00431 ± 0.00080	75-73-0*0
Methylidyne		592.824	596.159	± 0.099	kJ/mol	13.01864 ± 0.00080	3315-37-5*0
Toluene		73.30	50.01	± 0.34	kJ/mol	92.1384 ± 0.0056	108-88-3*0
Fluoroform		-688.93	-695.88	± 0.43	kJ/mol	70.01385 ± 0.00080	75-46-7*0
Ozone		144.397	141.734	± 0.039	kJ/mol	47.99820 ± 0.00090	10028-15-6*0
Trifluoromethyl		-465.08	-467.88	± 0.49	kJ/mol	69.00591 ± 0.00080	2264-21-3*0
Ethylium		914.83	902.75	± 0.31	kJ/mol	29.0606 ± 0.0016	14936-94-8*0
Acetone		-200.16	-216.85	± 0.38	kJ/mol	58.0791 ± 0.0025	67-64-1*0
Phenol		-74.66	-93.26	± 0.64	kJ/mol	94.1112 ± 0.0048	108-95-2*0
Oxonium		605.83	599.08	± 0.17	kJ/mol	19.02267 ± 0.00037	13968-08-6*0
Chloride		-228.953	-227.346	± 0.0021	kJ/mol	35.45325 ± 0.00090	16887-00-6*0
Bromide		-206.623	-212.686	± 0.056	kJ/mol	79.90455 ± 0.00100	24959-67-9*0
Hypobromous acid		-51.72	-62.20	± 0.59	kJ/mol	96.9113 ± 0.0010	13517-11-8*0
Vinyl		301.13	296.94	± 0.34	kJ/mol	27.0452 ± 0.0016	2669-89-8*0
Methoxy		28.79	21.42	± 0.29	kJ/mol	31.03392 ± 0.00088	2143-68-2*0
Chlorooxidanyl		101.125	101.716	± 0.035	kJ/mol	51.45210 ± 0.00095	14989-30-1*0
Methylamine		-7.02	-21.72	± 0.31	kJ/mol	31.05714 ± 0.00088	74-89-5*0
Methoxide		-122.68	-130.41	± 0.30	kJ/mol	31.03447 ± 0.00088	3315-60-4*0
Hydroxymethyl		-10.58	-16.89	± 0.28	kJ/mol	31.03392 ± 0.00088	2597-43-5*0
Oxomethylium		827.769	827.184	± 0.098	kJ/mol	29.01749 ± 0.00086	17030-74-9*0
Allene		197.34	189.86	± 0.25	kJ/mol	40.0639 ± 0.0024	463-49-0*0
1,3-Butadiene		125.32	110.84	± 0.37	kJ/mol	54.0904 ± 0.0032	106-99-0*0
Imidogen		358.75	358.79	± 0.17	kJ/mol	15.014680 ± 0.000099	13774-92-0*0
Nitrilomethyl		436.73	440.02	± 0.15	kJ/mol	26.01744 ± 0.00080	2074-87-5*0
Dioxymethyl	$[O-]\[O+]=C$	111.88	104.88	± 0.63	kJ/mol	46.0254 ± 0.0010	56077-92-0*0
Acetic acid		-418.66	-432.79	± 0.45	kJ/mol	60.0520 ± 0.0017	64-19-7*1
Difluorophosgene		-603.38	-606.48	± 0.41	kJ/mol	66.00691 ± 0.00085	353-50-4*0
Phenyl		350.24	336.89	± 0.54	kJ/mol	77.1039 ± 0.0048	2396-01-2*0
Nitric acid		-124.49	-134.21	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*0
Formyl		41.393	41.769	± 0.098	kJ/mol	29.01804 ± 0.00086	2597-44-6*0
Allyl		180.04	168.31	± 0.45	kJ/mol	41.0718 ± 0.0024	1981-80-2*0
Iodide		-187.995	-188.396	± 0.0021	kJ/mol	126.905019 ± 0.000030	20461-54-5*0
Cyanogen chloride		134.94	135.64	± 0.46	kJ/mol	61.4701 ± 0.0012	506-77-4*0
iso-Butane		-106.02	-134.63	± 0.31	kJ/mol	58.1222 ± 0.0033	75-28-5*0
Methylium		1099.266	1095.322	± 0.073	kJ/mol	15.03397 ± 0.00083	14531-53-4*0
Hypofluorous acid		-84.39	-87.29	± 0.19	kJ/mol	36.00574 ± 0.00031	14034-79-8*0
Hydrogen chloride			-166.452	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*834
Propargyl		353.97	351.38	± 0.38	kJ/mol	39.0559 ± 0.0024	2932-78-7*0
Dichloromethane		-87.18	-94.03	± 0.49	kJ/mol	84.9320 ± 0.0020	75-09-2*0
Vinyl chloride		29.28	21.70	± 0.30	kJ/mol	62.4979 ± 0.0018	75-01-4*0
Cyanogen bromide		186.7	180.1	± 1.1	kJ/mol	105.9214 ± 0.0013	506-68-3*0
Iodomethane		24.43	14.89	± 0.18	kJ/mol	141.93899 ± 0.00083	74-88-4*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
Ethoxide		-163.62	-178.56	± 0.49	kJ/mol	45.0610 ± 0.0017	16331-64-9*0
Amidogen		188.92	186.03	± 0.11	kJ/mol	16.02262 ± 0.00016	13770-40-6*0
n-Propyl		118.34	100.94	± 0.55	kJ/mol	43.0877 ± 0.0024	2143-61-5*0
iso-Propyl		105.33	88.46	± 0.53	kJ/mol	43.0877 ± 0.0024	2025-55-0*0
2-Hydroxyethyl		-13.04	-26.30	± 0.61	kJ/mol	45.0605 ± 0.0017	4422-54-2*1
Tetrabromomethane		132.9	103.2	± 1.3	kJ/mol	331.6267 ± 0.0041	558-13-4*0
Difluoromethane		-443.02	-450.63	± 0.35	kJ/mol	52.02339 ± 0.00081	75-10-5*0
Oxygen difluoride		26.81	24.56	± 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
Methyl hydroperoxide		-115.14	-127.96	± 0.72	kJ/mol	48.0413 ± 0.0010	3031-73-0*0
Methylperoxy		22.21	12.57	± 0.48	kJ/mol	47.0333 ± 0.0010	2143-58-0*0
Propynylidene		543.41	546.41	± 0.64	kJ/mol	38.0480 ± 0.0024	67152-18-5*1
Ethenol		-112.71	-123.91	± 0.66	kJ/mol	44.0526 ± 0.0017	557-75-5*1
Chloroform		-97.52	-102.42	± 0.52	kJ/mol	119.3767 ± 0.0028	67-66-3*0
Oxygen atom cation		1560.786	1562.644	± 0.0021	kJ/mol	15.99885 ± 0.00030	14581-93-2*0
1,2-Propadiene-1,3-diylidene		814.67	823.63	± 0.55	kJ/mol	36.0321 ± 0.0024	12075-35-3*0
Acetonitrile		81.11	74.06	± 0.26	kJ/mol	41.0520 ± 0.0016	75-05-8*0
Cyanic fluoride		8.79	9.12	± 0.71	kJ/mol	45.01584 ± 0.00080	1495-50-7*0
1-Hydroxyethyl		-42.26	-55.69	± 0.65	kJ/mol	45.0605 ± 0.0017	2348-46-1*1
Hydroxyformyl		-181.19	-184.16	± 0.50	kJ/mol	45.0174 ± 0.0010	2564-86-5*1
Formate		-463.15	-466.79	± 0.56	kJ/mol	45.0180 ± 0.0010	71-47-6*0
Tetrafluoroethylene		-671.21	-674.61	± 0.55	kJ/mol	100.0150 ± 0.0016	116-14-3*0
Fluoromethylidyne		243.15	246.75	± 0.13	kJ/mol	31.00910 ± 0.00080	3889-75-6*0
Chlorine fluoride		-55.620	-55.715	± 0.055	kJ/mol	54.45110 ± 0.00090	7790-89-8*0
Diazynium		1042.55	1038.94	± 0.68	kJ/mol	29.02087 ± 0.00016	12357-66-3*0
Methanimine		96.25	88.34	± 0.62	kJ/mol	29.04126 ± 0.00083	2053-29-4*0
Nitrite		-182.63	-185.44	± 0.46	kJ/mol	46.00609 ± 0.00060	14797-65-0*0
Hydroxylamine		-33.23	-43.61	± 0.46	kJ/mol	33.02996 ± 0.00037	7803-49-8*1
Nitrosyl hydride		109.93	106.96	± 0.11	kJ/mol	31.01408 ± 0.00032	14332-28-6*0
Nitrous acid		-73.005	-79.148	± 0.079	kJ/mol	47.01348 ± 0.00061	7782-77-6*1
Ethynylene		820.28	828.75	± 0.26	kJ/mol	24.0214 ± 0.0016	12070-15-4*0
Hydride		143.264	145.228	± 0.000	kJ/mol	1.008489 ± 0.000070	12184-88-2*0
n-Butyl		102.75	80.24	± 0.70	kJ/mol	57.1143 ± 0.0033	2492-36-6*0
Cyclopentadiene		150.83	133.71	± 0.66	kJ/mol	66.1011 ± 0.0040	542-92-7*0
Methoxymethane		-166.39	-183.90	± 0.41	kJ/mol	46.0684 ± 0.0017	115-10-6*0
Isocyanic acid		-115.85	-118.84	± 0.31	kJ/mol	43.02478 ± 0.00086	75-13-8*0
Methyl acetate		-394.20	-413.07	± 0.61	kJ/mol	74.0785 ± 0.0025	79-20-9*1
Phosgene		-217.45	-219.14	± 0.27	kJ/mol	98.9155 ± 0.0020	75-44-5*0
Phenylium		1148.46	1135.68	± 0.87	kJ/mol	77.1034 ± 0.0048	17333-73-2*0
Fluorooxidanyl		110.27	110.89	± 0.15	kJ/mol	34.99780 ± 0.00030	12061-70-0*0
Hypoiodous acid		-54.2	-58.9	± 3.1	kJ/mol	143.91181 ± 0.00031	14332-21-9*0
Methanium		921.96	911.71	± 0.45	kJ/mol	17.04985 ± 0.00087	15135-49-6*0
Oxirane		-40.06	-52.59	± 0.38	kJ/mol	44.0526 ± 0.0017	75-21-8*0
Ethynide		277.41	280.82	± 0.18	kJ/mol	25.0299 ± 0.0016	29075-95-4*0
cis-2-Butene	$C/C=C\C$	14.20	-7.07	± 0.41	kJ/mol	56.1063 ± 0.0032	590-18-1*0
Methanetetraylbisamidogen		450.42	450.83	± 0.64	kJ/mol	40.02418 ± 0.00081	2669-76-3*0
Fluoroethane		-257.23	-272.09	± 0.37	kJ/mol	48.0595 ± 0.0016	353-36-6*0
Chlorotrifluoromethane		-704.86	-709.97	± 0.71	kJ/mol	104.4586 ± 0.0012	75-72-9*0
Bromotrifluoromethane		-639.16	-651.28	± 0.47	kJ/mol	148.9099 ± 0.0013	75-63-8*0
Ethyl bromide		-41.42	-63.36	± 0.25	kJ/mol	108.9651 ± 0.0019	74-96-4*0
Fluorobenzene		-99.08	-114.75	± 0.89	kJ/mol	96.1023 ± 0.0048	462-06-6*0
Nitromethane		-60.84	-74.74	± 0.46	kJ/mol	61.0401 ± 0.0010	75-52-5*0
Chlorine dioxide		101.33	98.85	± 0.27	kJ/mol	67.4515 ± 0.0011	10049-04-4*0
Dioxygen cation		1164.585	1165.221	± 0.0092	kJ/mol	31.99825 ± 0.00060	12185-07-8*0
Methylidyne		664.55	667.89	± 0.59	kJ/mol	13.01864 ± 0.00080	3315-37-5*2
Ethanide		155.30	144.22	± 0.89	kJ/mol	29.0616 ± 0.0016	25013-41-6*0
Ethynyl		563.86	567.98	± 0.14	kJ/mol	25.0293 ± 0.0016	2122-48-7*0
Aminomethyl		158.91	149.07	± 0.44	kJ/mol	30.04920 ± 0.00085	10507-29-6*0
Peroxyformic acid		-279.34	-288.69	± 0.90	kJ/mol	62.0248 ± 0.0012	107-32-4*1
Cyclopropane		70.98	53.86	± 0.41	kJ/mol	42.0797 ± 0.0024	75-19-4*0
Propadienylidene		554.41	555.56	± 0.41	kJ/mol	38.0480 ± 0.0024	60731-10-4*0
Ethoxy		1.51	-12.40	± 0.48	kJ/mol	45.0605 ± 0.0017	2154-50-9*51
Acetyl		-3.31	-9.97	± 0.35	kJ/mol	43.0446 ± 0.0016	3170-69-2*0
Cyanooxidanyl		127.02	127.49	± 0.35	kJ/mol	42.01684 ± 0.00086	22400-26-6*0
Methyl formate		-346.70	-359.75	± 0.94	kJ/mol	60.0520 ± 0.0017	107-31-3*1
Phenolate		-146.36	-161.83	± 0.88	kJ/mol	93.1038 ± 0.0048	3229-70-7*0
Dimethylamine		3.54	-18.10	± 0.48	kJ/mol	45.0837 ± 0.0017	124-40-3*0
Bromoform		74.7	48.5	± 1.3	kJ/mol	252.7306 ± 0.0031	75-25-2*0
Cyclopentadienyl		274.43	261.32	± 0.93	kJ/mol	65.0932 ± 0.0040	2143-53-5*0
Bromooxidanyl		131.14	123.60	± 0.28	kJ/mol	95.9034 ± 0.0010	15656-19-6*0
Hypobromite		-96.16	-103.64	± 0.54	kJ/mol	95.9039 ± 0.0010	14380-62-2*0
Fluorodioxidanyl		26.80	25.10	± 0.26	kJ/mol	50.99720 ± 0.00060	15499-23-7*0
Peroxynitrous acid		-5.81	-14.25	± 0.36	kJ/mol	63.01288 ± 0.00091	14691-52-2*3
Cyanide		63.957	67.243	± 0.094	kJ/mol	26.01799 ± 0.00080	57-12-5*0
Isobutene		4.03	-17.04	± 0.42	kJ/mol	56.1063 ± 0.0032	115-11-7*0
1-Butene		21.01	0.06	± 0.38	kJ/mol	56.1063 ± 0.0032	106-98-9*0
Dichloromethylene		229.49	230.67	± 0.64	kJ/mol	82.9161 ± 0.0020	1605-72-7*2
Vinyl fluoride		-134.63	-142.43	± 0.48	kJ/mol	46.0436 ± 0.0016	75-02-5*0
Vinyl bromide		88.61	73.81	± 0.60	kJ/mol	106.9492 ± 0.0019	593-60-2*0
Chlorobenzene		67.14	52.19	± 0.61	kJ/mol	112.5566 ± 0.0049	108-90-7*0
Hydrogen fluoride			-334.49	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*800
Difluorodioxidane		35.27	31.54	± 0.41	kJ/mol	69.99561 ± 0.00060	7783-44-0*0
Water			-285.829	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*590
Nitrous oxide		85.997	82.568	± 0.097	kJ/mol	44.01288 ± 0.00033	10024-97-2*0
(E)-Diazene		207.09	199.95	± 0.44	kJ/mol	30.02936 ± 0.00020	15626-43-4*0
Hydroxyoxomethylium		600.66	597.58	± 0.44	kJ/mol	45.0169 ± 0.0010	638-71-1*0
Ethylidene		361.35	354.35	± 0.76	kJ/mol	28.0532 ± 0.0016	4218-50-2*1
Vinylium		1118.99	1115.54	± 0.59	kJ/mol	27.0447 ± 0.0016	14604-48-9*0
Hydroxymethylium		717.65	709.71	± 0.19	kJ/mol	31.03337 ± 0.00088	18682-95-6*0
Cyanogen		308.31	310.26	± 0.43	kJ/mol	52.0349 ± 0.0016	460-19-5*0
Peroxyformyl		-100.46	-105.77	± 0.93	kJ/mol	61.0168 ± 0.0012	56240-83-6*1
Dioxidanide		-88.86	-91.53	± 0.34	kJ/mol	33.00729 ± 0.00060	14691-59-9*0
Cyclopropene		292.34	283.61	± 0.53	kJ/mol	40.0639 ± 0.0024	2781-85-3*0
n-Pentane		-114.40	-146.27	± 0.31	kJ/mol	72.1488 ± 0.0041	109-66-0*0
Trioxidane		-82.04	-90.88	± 0.70	kJ/mol	50.01408 ± 0.00091	14699-99-1*1
Formic acid		-354.71	-361.81	± 0.39	kJ/mol	46.0254 ± 0.0010	64-18-6*2
Formic acid		-371.08	-378.37	± 0.22	kJ/mol	46.0254 ± 0.0010	64-18-6*0
Trichloromethyl		71.95	71.47	± 0.84	kJ/mol	118.3688 ± 0.0028	3170-80-7*0
1,1-Dichloroethane		-120.32	-133.10	± 0.44	kJ/mol	98.9586 ± 0.0024	75-34-3*0
Bromobenzene		126.6	104.6	± 1.3	kJ/mol	157.0079 ± 0.0049	108-86-1*0
Benzaldehyde		-19.38	-37.18	± 0.92	kJ/mol	106.1219 ± 0.0056	100-52-7*0
Chlorous acid		25.74	20.68	± 0.63	kJ/mol	68.4594 ± 0.0011	13898-47-0*0
Iodooxidanyl		126.97	125.04	± 0.82	kJ/mol	142.90387 ± 0.00030	14696-98-1*0
Carbon monoxide cation		1238.306	1241.586	± 0.026	kJ/mol	28.00955 ± 0.00085	12144-04-6*0
Ammonium		643.03	631.72	± 0.21	kJ/mol	18.03795 ± 0.00029	14798-03-9*0
Azanide		114.78	111.91	± 0.30	kJ/mol	16.02317 ± 0.00016	17655-31-1*0
Aminooxy		70.93	64.33	± 0.76	kJ/mol	32.02202 ± 0.00034	13408-29-2*0
Hydroxyamidogen		101.6	94.7	± 1.1	kJ/mol	32.02202 ± 0.00034	13940-32-4*1
Nitrate		-300.17	-306.64	± 0.60	kJ/mol	62.00549 ± 0.00090	14797-55-8*0
Cyanogen iodide		222.7	222.1	± 1.6	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
Hypofluorite		-108.84	-108.67	± 0.48	kJ/mol	34.99835 ± 0.00030	12763-66-5*0
2-Propynylidyne		717.99	722.34	± 0.82	kJ/mol	37.0400 ± 0.0024	53590-28-6*0
Cyclopentane		-43.96	-76.53	± 0.41	kJ/mol	70.1329 ± 0.0041	287-92-3*0
Ethoxy		5.77	-8.67	± 0.48	kJ/mol	45.0605 ± 0.0017	2154-50-9*52
Chloromethylene		320.26	320.54	± 0.89	kJ/mol	48.4713 ± 0.0012	2108-20-5*2
Dibromomethane		25.2	3.8	± 1.1	kJ/mol	173.8346 ± 0.0022	74-95-3*0
Trifluoromethylium		409.29	406.08	± 0.48	kJ/mol	69.00536 ± 0.00080	18851-76-8*0
Phenide		244.38	230.95	± 0.39	kJ/mol	77.1044 ± 0.0048	30922-78-2*0
3-Buten-2-one		-95.61	-111.85	± 0.88	kJ/mol	70.0898 ± 0.0032	78-94-4*1
Chloronium		881.3	878.2	± 1.1	kJ/mol	37.46803 ± 0.00091	36658-55-6*0
Chlorine trifluoride		-158.6	-162.7	± 1.2	kJ/mol	92.44791 ± 0.00090	7790-91-2*0
Iodine monochloride		19.024	17.391	± 0.013	kJ/mol	162.35717 ± 0.00090	7790-99-0*0
Iodotrifluoromethane		-583.71	-589.59	± 0.51	kJ/mol	195.91038 ± 0.00080	2314-97-8*0
Nitrogen atom cation		1872.907	1875.689	± 0.024	kJ/mol	14.006191 ± 0.000070	14158-23-7*0
Azido radical		452.22	449.63	± 0.60	kJ/mol	42.02022 ± 0.00021	12596-60-0*0
Trinitrogen cation		1519.39	1516.76	± 0.89	kJ/mol	42.01967 ± 0.00021	12185-03-4*0
Oxonitrate anion		88.09	88.13	± 0.25	kJ/mol	30.00669 ± 0.00031	14967-78-3*0
Nitrosyl ion		984.487	984.482	± 0.065	kJ/mol	30.00559 ± 0.00031	14452-93-8*0
Nitrogen sesquioxide		90.72	86.15	± 0.15	kJ/mol	76.01168 ± 0.00091	10544-73-7*0
Hydrazoic acid		297.86	291.56	± 0.49	kJ/mol	43.02816 ± 0.00022	7782-79-8*0
Methylene anion		328.17	328.60	± 0.19	kJ/mol	14.02713 ± 0.00081	50928-07-9*0
Ethanium		874.34	858.08	± 0.62	kJ/mol	31.0764 ± 0.0017	24669-33-8*1
Acetylium		666.52	659.23	± 0.47	kJ/mol	43.0441 ± 0.0016	15762-07-9*0
Hydroxymethylene		112.66	108.89	± 0.28	kJ/mol	30.02598 ± 0.00087	19710-56-6*1
Carbonic acid		-602.74	-612.91	± 0.75	kJ/mol	62.0248 ± 0.0012	463-79-6*1
Peroxyformate		-341.00	-346.46	± 0.96	kJ/mol	61.0174 ± 0.0012	104960-05-6*1
Isoprene		96.10	75.58	± 0.67	kJ/mol	68.1170 ± 0.0040	78-79-5*0
n-Hexane		-130.05	-166.93	± 0.34	kJ/mol	86.1754 ± 0.0049	110-54-3*0
1-Hydroxyethylium		608.82	594.40	± 0.40	kJ/mol	45.0600 ± 0.0017	18682-96-7*1
Dicarbon monoxide		377.29	381.33	± 0.98	kJ/mol	40.0208 ± 0.0016	12071-23-7*1
Hydrogen bromide			-120.97	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*800
Formyloxidanyl		-125.81	-127.48	± 0.56	kJ/mol	45.0174 ± 0.0010	16499-21-1*1
Trimethylamine		1.17	-27.69	± 0.92	kJ/mol	59.1103 ± 0.0025	75-50-3*0
1,1,1-Trichloroethane		-134.34	-144.91	± 0.48	kJ/mol	133.4033 ± 0.0031	71-55-6*0
Tetrachloroethene		-22.4	-23.3	± 1.1	kJ/mol	165.8322 ± 0.0039	127-18-4*0
Chlorodifluoromethane		-476.4	-482.5	± 1.2	kJ/mol	86.4681 ± 0.0012	75-45-6*0
Fluoromethylene		148.37	148.66	± 0.43	kJ/mol	32.01704 ± 0.00080	13453-52-6*2
Fluoroformyl		-176.63	-176.05	± 0.37	kJ/mol	47.00850 ± 0.00085	1871-24-5*0
2-Bromoethanol		-196.48	-220.55	± 0.55	kJ/mol	124.9645 ± 0.0019	540-51-2*0
Propionaldehyde		-171.38	-186.78	± 0.25	kJ/mol	58.0791 ± 0.0025	123-38-6*0
Bromonium		925.0	914.2	± 1.5	kJ/mol	81.9193 ± 0.0010	36658-54-5*0
Hydrazine		111.57	97.41	± 0.49	kJ/mol	32.04524 ± 0.00031	302-01-2*0
Methanide		141.07	137.62	± 0.25	kJ/mol	15.03507 ± 0.00083	15194-58-8*0
Methyliumyl		1393.20	1394.06	± 0.11	kJ/mol	14.02603 ± 0.00081	15091-72-2*0
Hydrogen chloride			-166.991	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*800
Ethylidene		373.80	366.57	± 0.87	kJ/mol	28.0532 ± 0.0016	4218-50-2*2
Vinyl anion		236.91	232.49	± 0.86	kJ/mol	27.0458 ± 0.0016	25012-81-1*0
Ethylidyne		640.7	636.1	± 1.1	kJ/mol	27.0452 ± 0.0016	67624-57-1*2
Aminomethylium		763.54	751.57	± 0.66	kJ/mol	30.04865 ± 0.00085	488821-23-4*0
2-Butyne		159.36	146.39	± 0.58	kJ/mol	54.0904 ± 0.0032	503-17-3*0
1-Methylethenyl		262.99	252.59	± 0.77	kJ/mol	41.0718 ± 0.0024	15552-77-9*0
Trioxidanide		-120.0	-123.1	± 1.6	kJ/mol	49.00669 ± 0.00090	89965-38-8*2
trans-2-Butene		9.40	-11.17	± 0.41	kJ/mol	56.1063 ± 0.0032	624-64-6*0
1-Hydroxyethyl		-40.71	-54.18	± 0.93	kJ/mol	45.0605 ± 0.0017	2348-46-1*2
Protonated oxirane		725.29	709.12	± 0.66	kJ/mol	45.0600 ± 0.0017	38607-31-70
Ketenyl		177.13	178.24	± 0.59	kJ/mol	41.0287 ± 0.0016	51095-15-9*0
Methanediol		-379.39	-393.59	± 0.93	kJ/mol	48.0413 ± 0.0010	463-57-0*1
Methoxyethane		-194.06	-216.95	± 0.48	kJ/mol	60.0950 ± 0.0025	540-67-0*0
Methyl formate		-326.6	-339.1	± 1.4	kJ/mol	60.0520 ± 0.0017	107-31-3*2
Acetyl chloride		-232.59	-241.59	± 0.33	kJ/mol	78.4973 ± 0.0019	75-36-5*0
Chlorohydroxymethyl		-55.0	-61.0	± 1.1	kJ/mol	65.4787 ± 0.0012	147139-06-8*1
1,1-Dichloroethene		8.93	2.94	± 0.49	kJ/mol	96.9427 ± 0.0024	75-35-4*0
Dichlorodifluoromethane		-490.39	-495.15	± 0.97	kJ/mol	120.9129 ± 0.0020	75-71-8*0
Fluorodichloromethane		-278.7	-284.1	± 1.3	kJ/mol	102.9224 ± 0.0020	75-43-4*0
Difluoromethylene		-193.93	-193.46	± 0.38	kJ/mol	50.00751 ± 0.00080	2154-59-8*2
Fluoromethylene		210.35	210.69	± 0.66	kJ/mol	32.01704 ± 0.00080	13453-52-6*1
Hydrogen peroxide cation		897.75	890.77	± 0.37	kJ/mol	34.01413 ± 0.00062	12325-10-9*1
Formyl fluoride		-378.65	-382.24	± 0.31	kJ/mol	48.01644 ± 0.00086	1493-02-3*0
Benzyl		229.92	211.10	± 0.61	kJ/mol	91.1305 ± 0.0056	2154-56-5*0
Methyl nitrite		-55.67	-67.45	± 0.46	kJ/mol	61.0401 ± 0.0010	624-91-9*2
Chloro hypochlorite		79.78	77.97	± 0.36	kJ/mol	86.9048 ± 0.0018	7791-21-1*0
Chlorooxy hypochlorite		134.56	131.32	± 0.56	kJ/mol	102.9042 ± 0.0019	12292-23-8*0
Peroxyhypochlorous acid		3.94	-1.33	± 0.95	kJ/mol	68.4594 ± 0.0011	67952-07-2*0
Hypoiodite		-102.48	-104.29	± 0.88	kJ/mol	142.90442 ± 0.00030	15065-65-3*0
Dichloride		-229.8	-228.7	± 1.4	kJ/mol	70.9059 ± 0.0018	12595-89-0*0
Dinitrogen cation		1503.311	1503.312	± 0.000	kJ/mol	28.01293 ± 0.00014	13966-04-6*0
Chlorine atom cation		1370.806	1372.602	± 0.0011	kJ/mol	35.45215 ± 0.00090	24203-47-2*0
Carbon dioxide cation		936.092	936.927	± 0.017	kJ/mol	44.00895 ± 0.00100	12181-61-2*0
Ammonium			-133.075	± 0.056	kJ/mol	18.03795 ± 0.00029	14798-03-9*800
Hydrazino		234.81	224.29	± 0.78	kJ/mol	31.03730 ± 0.00025	13598-46-4*0
Methylidyne anion		475.75	479.07	± 0.22	kJ/mol	13.01919 ± 0.00080	28604-54-8*0
Methylamidogen		187.21	176.56	± 0.49	kJ/mol	30.04920 ± 0.00085	15622-51-2*0
Hydrogen isocyanide cation		1352.9	1352.9	± 1.3	kJ/mol	27.02483 ± 0.00081	74158-11-5*0
iso-Propylium		822.93	805.85	± 0.25	kJ/mol	43.0871 ± 0.0024	19252-53-0*0
n-Propylide		122.9	105.3	± 1.2	kJ/mol	43.0882 ± 0.0024	59513-13-2*0
1,2-Propadienyl anion		265.67	262.61	± 0.71	kJ/mol	39.0565 ± 0.0024	64066-06-4*0
Propargylenide		434.4	436.9	± 1.1	kJ/mol	38.0485 ± 0.0024	82906-05-6*1
Chlorine pentafluoride		-226.1	-234.2	± 1.7	kJ/mol	130.44472 ± 0.00090	13637-63-3*0
t-Butyl		75.61	50.32	± 0.66	kJ/mol	57.1143 ± 0.0033	1605-73-8*0
neo-Pentane		-134.62	-167.50	± 0.40	kJ/mol	72.1488 ± 0.0041	463-82-1*0
2-Hydroxyethyl		-10.21	-22.84	± 0.91	kJ/mol	45.0605 ± 0.0017	4422-54-2*2
Ketene		182.3	177.3	± 1.2	kJ/mol	42.0367 ± 0.0016	463-51-4*1
Methanediol		-369.09	-382.24	± 0.96	kJ/mol	48.0413 ± 0.0010	463-57-0*2
Methoxyethene		-88.9	-106.7	± 1.1	kJ/mol	58.0791 ± 0.0025	107-25-5*2
Methyl acetate		-363.3	-382.1	± 1.2	kJ/mol	74.0785 ± 0.0025	79-20-9*2
(Methylamino)methyl		167.57	151.12	± 0.97	kJ/mol	44.0758 ± 0.0017	31277-24-4*0
Dimethylamidogen		173.7	156.4	± 1.5	kJ/mol	44.0758 ± 0.0017	15337-44-7*0
Cyanoamidogen		323.9	321.4	± 1.4	kJ/mol	41.03212 ± 0.00082	12347-01-2*0
Bromotrichloromethane		-32.72	-41.87	± 0.60	kJ/mol	198.2728 ± 0.0030	75-62-7*0
Hydroperoxonium		738.1	727.8	± 1.2	kJ/mol	35.02207 ± 0.00064	70850-26-9*1
Chloromethylidyne		430.42	434.17	± 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		-12.1	-18.9	± 1.1	kJ/mol	65.4787 ± 0.0012	114282-89-2*0
Tetraiodomethane		332.0	326.9	± 4.1	kJ/mol	519.62858 ± 0.00081	507-25-5*0
2-Chloroethanol		-249.85	-266.56	± 0.59	kJ/mol	80.5132 ± 0.0019	107-07-3*0
Carbon suboxide		-94.9	-92.8	± 1.2	kJ/mol	68.0309 ± 0.0025	504-64-3*0
o-Benzyne		468.03	459.11	± 0.88	kJ/mol	76.0960 ± 0.0048	462-80-6*2
Tropyl		295.6	278.2	± 1.1	kJ/mol	91.1305 ± 0.0056	3551-27-7*0
Acetonyl		-19.10	-31.81	± 0.98	kJ/mol	57.0712 ± 0.0024	3122-07-4*0
Bromanylium		1257.774	1251.712	± 0.056	kJ/mol	79.90345 ± 0.00100	22541-56-6*0
Dioxodiazoxane		93.0	87.9	± 1.3	kJ/mol	76.01168 ± 0.00091	122413-35-8*1
Nitric acid			-206.64	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*800
Oxoammoniumyl		1092.46	1089.53	± 0.67	kJ/mol	31.01353 ± 0.00032	63559-87-5*0
Peroxynitrous acid		7.77	0.69	± 0.41	kJ/mol	63.01288 ± 0.00091	14691-52-2*1
Carbon atom anion		589.624	594.770	± 0.048	kJ/mol	12.01125 ± 0.00080	14337-00-9*0
Water dimer		-491.083	-499.123	± 0.052	kJ/mol	36.03056 ± 0.00066	25655-83-8*0
Difluoride		-291.0	-290.2	± 1.5	kJ/mol	37.9973550 ± 0.0000010	12184-85-9*0
Ethylidyne		508.54	504.84	± 0.80	kJ/mol	27.0452 ± 0.0016	67624-57-1*0
Hydrogen fluoride			-321.03	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*818
Methylamidogen anion		144.89	134.06	± 0.67	kJ/mol	30.04975 ± 0.00085	54448-39-4*0
Iminomethyl cation		953.3	949.3	± 1.4	kJ/mol	28.03277 ± 0.00082	196216-36-1*0
Fluoronium		774.10	771.16	± 0.88	kJ/mol	21.01373 ± 0.00014	12206-67-6*2
Chloroacetylene		228.13	228.99	± 0.72	kJ/mol	60.4820 ± 0.0018	593-63-5*0
Cyanomethyl		263.2	260.3	± 1.1	kJ/mol	40.0440 ± 0.0016	2932-82-3*0
Fluoroacetylene		104.93	105.65	± 0.41	kJ/mol	44.0277 ± 0.0016	2713-09-9*0
Methylperoxy anion		-89.96	-100.10	± 0.65	kJ/mol	47.0339 ± 0.0010	35683-44-4*0
1-Propenyl		278.23	267.39	± 0.78	kJ/mol	41.0718 ± 0.0024	6067-68-1*2
Propylidyne		492.5	482.8	± 1.2	kJ/mol	41.0718 ± 0.0024	85056-54-8*1
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-Butyne		179.43	165.84	± 0.67	kJ/mol	54.0904 ± 0.0032	107-00-6*0
iso-Pentane		-119.16	-153.21	± 0.44	kJ/mol	72.1488 ± 0.0041	78-78-4*0
2-Hydrotrioxy		299.6	293.9	± 1.2	kJ/mol	49.00614 ± 0.00090	12500-78-60
Oxoethanide		-44.0	-49.6	± 1.3	kJ/mol	43.0452 ± 0.0016	78944-68-0*0
Oxirene		272.91	270.76	± 0.96	kJ/mol	42.0367 ± 0.0016	157-18-6*2
Ethynol		95.3	92.8	± 1.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*2
Trioxidane		-72.75	-81.24	± 0.83	kJ/mol	50.01408 ± 0.00091	14699-99-1*2
Hydroxyformyl		-174.36	-177.39	± 0.53	kJ/mol	45.0174 ± 0.0010	2564-86-5*2
Hydroxyformyl anion		-319.52	-322.10	± 0.60	kJ/mol	45.0180 ± 0.0010	78944-70-4*2
Ethoxyethane		-222.67	-250.09	± 0.81	kJ/mol	74.1216 ± 0.0033	60-29-7*0
Acetic acid		-397.55	-411.33	± 0.89	kJ/mol	60.0520 ± 0.0017	64-19-7*2
Acetone enol		-151.8	-169.2	± 1.1	kJ/mol	58.0791 ± 0.0025	29456-04-0*1
Acetate		-496.4	-505.5	± 1.2	kJ/mol	59.0446 ± 0.0017	71-50-1*0
(Dimethylamino)methyl		165.1	142.0	± 1.4	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		-147.0	-149.4	± 1.3	kJ/mol	236.7376 ± 0.0056	67-72-1*0
cis-1,2-Dichloroethene	$C(\Cl)=C\Cl$	3.46	-2.54	± 0.54	kJ/mol	96.9427 ± 0.0024	156-59-2*0
Chlorodioxidanyl		103.91	102.82	± 0.37	kJ/mol	67.4515 ± 0.0011	17376-09-9*0
Dichloroacetylene		230.04	233.35	± 0.95	kJ/mol	94.9268 ± 0.0024	7572-29-4*0
Chloric acid		2.1	-5.0	± 1.6	kJ/mol	84.4588 ± 0.0013	7790-93-4*0
Fluorotrichloromethane		-286.4	-289.6	± 1.2	kJ/mol	137.3672 ± 0.0028	75-69-4*0
Difluoromethylene		-193.93	-193.46	± 0.38	kJ/mol	50.00751 ± 0.00080	2154-59-8*0
Perchloryl		191.68	186.01	± 0.61	kJ/mol	83.4509 ± 0.0013	13932-10-0*0
Hexafluoroethane		-1334.9	-1343.2	± 1.1	kJ/mol	138.0118 ± 0.0016	76-16-4*0
Chlorate		-207.3	-212.8	± 1.6	kJ/mol	83.4514 ± 0.0013	14866-68-3*0
1,1-Difluoroethane		-489.17	-502.89	± 0.56	kJ/mol	66.0500 ± 0.0016	75-37-6*0
1,1-Difluoroethene		-343.57	-350.63	± 0.94	kJ/mol	64.0341 ± 0.0016	75-38-7*0
2-Fluoroethanol		-405.71	-422.95	± 0.99	kJ/mol	64.0589 ± 0.0017	371-62-0*0
Benzylide		141.76	122.85	± 0.44	kJ/mol	91.1310 ± 0.0056	18860-15-6*0
Ethylbenzene		58.18	29.72	± 0.55	kJ/mol	106.1650 ± 0.0064	100-41-4*0
Phenylethene		169.66	148.32	± 0.55	kJ/mol	104.1491 ± 0.0064	100-42-5*0
Phenylacetylene		332.4	317.2	± 1.1	kJ/mol	102.1332 ± 0.0064	536-74-3*0
Acetonate		-187.92	-201.47	± 0.98	kJ/mol	57.0717 ± 0.0024	24262-31-5*0
Propadienone		131.96	130.33	± 0.79	kJ/mol	54.0474 ± 0.0024	61244-93-7*0
Iodine monobromide		49.715	40.768	± 0.067	kJ/mol	206.8085 ± 0.0010	7789-33-5*0
Dioxaziridinyl		355.1	352.6	± 1.4	kJ/mol	46.00554 ± 0.00060	66252-29-7*0
Nitroxyl		79.40	74.14	± 0.19	kJ/mol	62.00494 ± 0.00090	12033-49-7*0
Isodiazene		307.52	300.44	± 0.75	kJ/mol	30.02936 ± 0.00020	28647-38-3*0
Nitryl hydride		-37.1	-44.1	± 1.5	kJ/mol	47.01348 ± 0.00061	90266-90-3*0
Carbon atom cation		1797.853	1803.451	± 0.048	kJ/mol	12.01015 ± 0.00080	14067-05-1*0
Oxidanylium		1293.189	1293.218	± 0.035	kJ/mol	17.00679 ± 0.00031	12259-29-9*0
Methyliumylidene		1619.758	1623.101	± 0.055	kJ/mol	13.01809 ± 0.00080	24361-82-8*0
Ethylidyne		508.54	504.84	± 0.80	kJ/mol	27.0452 ± 0.0016	67624-57-1*1
Trioxidanyl		25.32	23.33	± 0.13	kJ/mol	49.00614 ± 0.00090	12500-78-6*1
Methyleneamidogen		241.94	238.29	± 0.67	kJ/mol	28.03332 ± 0.00082	15845-29-1*0
(E)-Iminomethyl		275.82	272.21	± 0.71	kJ/mol	28.03332 ± 0.00082	54980-10-8*0
Hydrogen isocyanide		191.98	192.36	± 0.37	kJ/mol	27.02538 ± 0.00081	6914-07-4*0
Nitrilomethylium		1776.9	1780.4	± 1.3	kJ/mol	26.01689 ± 0.00080	12539-57-0*0
Dioxygen anion		-43.36	-42.72	± 0.17	kJ/mol	31.99935 ± 0.00060	11062-77-4*0
Methanol cation		856.79	846.47	± 0.33	kJ/mol	32.04131 ± 0.00090	12538-91-9*0
Methyloxonium		588.5	574.3	± 1.2	kJ/mol	33.04925 ± 0.00092	17836-08-7*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		-596.87	-606.99	± 0.83	kJ/mol	62.0248 ± 0.0012	463-79-6*2
Carbonic acid		-561.65	-570.49	± 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
n-Propylium		856.97	838.69	± 0.86	kJ/mol	43.0871 ± 0.0024	19252-52-9*0
Allyl anion		134.14	123.13	± 0.24	kJ/mol	41.0723 ± 0.0024	1724-46-5*0
Cyclopropyl		303.3	290.7	± 1.5	kJ/mol	41.0718 ± 0.0024	2417-82-5*0
Propylidyne		624.6	613.0	± 1.3	kJ/mol	41.0718 ± 0.0024	85056-54-8*2
1-Propynylide		264.22	260.63	± 0.84	kJ/mol	39.0565 ± 0.0024	36147-87-2*0
1-Propen-1-yl-3-ylidene		657.4	653.9	± 1.5	kJ/mol	39.0559 ± 0.0024	84654-90-0*11
sec-Butyl		90.85	66.08	± 0.95	kJ/mol	57.1143 ± 0.0033	2348-55-2*0
Cyclohexane		-83.56	-123.13	± 0.36	kJ/mol	84.1595 ± 0.0049	110-82-7*0
Oxirene		387.9	383.7	± 1.7	kJ/mol	42.0367 ± 0.0016	157-18-6*11
Oxiranylidene		213.5	209.3	± 1.4	kJ/mol	42.0367 ± 0.0016	50983-85-2*2
Oxoethylidene		261.2	257.7	± 1.6	kJ/mol	42.0367 ± 0.0016	39920-84-8*12
Dioxirane		9.43	1.76	± 0.55	kJ/mol	46.0254 ± 0.0010	157-26-6*0
Hydroxyde			-230.013	± 0.029	kJ/mol	17.00789 ± 0.00031	14280-30-9*800
Hydroxyformyl anion		-313.70	-315.50	± 0.61	kJ/mol	45.0180 ± 0.0010	78944-70-4*1
Ethoxyethene		-117.3	-141.0	± 1.5	kJ/mol	72.1057 ± 0.0033	109-92-2*2
Cyanic acid		-12.20	-14.91	± 0.49	kJ/mol	43.02478 ± 0.00086	420-05-3*0
Isofulminic acid		235.38	233.67	± 0.48	kJ/mol	43.02478 ± 0.00086	506-85-4*0
Acetic acid		-418.66	-432.79	± 0.45	kJ/mol	60.0520 ± 0.0017	64-19-7*0
Bromochlorane		21.879	14.435	± 0.060	kJ/mol	115.3567 ± 0.0013	13863-41-7*0
Methoxyoxomethyl		-152.6	-160.6	± 1.5	kJ/mol	59.0440 ± 0.0017	16481-04-2*1
(Formyloxy)methyl		-151.8	-159.9	± 1.3	kJ/mol	59.0440 ± 0.0017	3122-12-1*1
Carboxymethyl		-227.3	-237.1	± 1.2	kJ/mol	59.0440 ± 0.0017	2887-46-9*1
Ethylene glycol		-369.79	-389.42	± 0.49	kJ/mol	62.0678 ± 0.0018	107-21-1*0
(Methylamino)methyl cation		728.82	710.20	± 0.99	kJ/mol	44.0752 ± 0.0017	31277-24-40
Diazomethyl		470.6	468.1	± 1.5	kJ/mol	41.03212 ± 0.00082	20813-32-5*0
Isocyanoamidogen		491.1	489.1	± 1.5	kJ/mol	41.03212 ± 0.00082	947408-73-3*0
Oxygen atom		436.666	438.523	± 0.0021	kJ/mol	15.99940 ± 0.00030	17778-80-2*2
Dichloromethyl		92.07	90.15	± 0.88	kJ/mol	83.9240 ± 0.0020	3474-12-2*0
Chloromethyl		118.33	115.26	± 0.87	kJ/mol	49.4793 ± 0.0012	6806-86-6*0
Methyl hypochlorite		-53.1	-63.1	± 1.4	kJ/mol	66.4866 ± 0.0013	593-78-2*0
1,2-Dichloroethane		-118.57	-130.51	± 0.54	kJ/mol	98.9586 ± 0.0024	107-06-2*0
Ozonide		-58.48	-60.84	± 0.21	kJ/mol	47.99875 ± 0.00090	12596-80-4*0
Trioxygen difluoride		112.2	106.5	± 1.1	kJ/mol	85.99501 ± 0.00090	16829-28-0*1
Chlorofluoromethane		-256.3	-263.4	± 1.3	kJ/mol	68.4777 ± 0.0012	593-70-4*0
Difluoromethyliumyl		908.14	908.56	± 0.78	kJ/mol	50.00696 ± 0.00080	54250-40-7*0
Formyl chloride		-179.99	-183.20	± 0.77	kJ/mol	64.4707 ± 0.0012	2565-30-2*0
Chloroformyl		-21.92	-20.52	± 0.49	kJ/mol	63.4628 ± 0.0012	2602-42-8*0
Hypochloroperoxoous acid, hydroxy ester		49.1	42.2	± 1.9	kJ/mol	84.4588 ± 0.0013	928652-99-7*1
1,3-Butadiyne		458.33	460.05	± 0.82	kJ/mol	50.0587 ± 0.0032	460-12-8*0
o-Benzyne anion		413.72	404.61	± 0.97	kJ/mol	76.0965 ± 0.0048	100569-88-8*0
Cycloheptene		28.12	-9.11	± 0.75	kJ/mol	96.1702 ± 0.0057	628-92-2*0
Cycloheptatriene		206.93	183.51	± 0.95	kJ/mol	92.1384 ± 0.0056	544-25-2*0
Fluorobenzene cation		788.90	773.88	± 0.89	kJ/mol	96.1018 ± 0.0048	34468-25-2*0
Nitrosobenzene		215.7	198.7	± 1.2	kJ/mol	107.1100 ± 0.0048	586-96-9*0
Nitromethyl		138.9	129.5	± 1.2	kJ/mol	60.0321 ± 0.0010	16787-85-2*0
Methylketene		-54.7	-64.2	± 1.1	kJ/mol	56.0633 ± 0.0024	6004-44-0*0
Acrolein		-55.3	-65.7	± 1.2	kJ/mol	56.0633 ± 0.0024	107-02-8*1
Dinitrogen pentoxide		24.43	14.86	± 0.35	kJ/mol	108.0105 ± 0.0015	10102-03-1*0
Diazenyl		252.17	249.25	± 0.47	kJ/mol	29.02142 ± 0.00016	36882-13-0*0
Peroxynitric acid		-42.6	-53.0	± 1.3	kJ/mol	79.0123 ± 0.0012	26404-66-0*0
Nitrosyl chloride		54.453	52.552	± 0.067	kJ/mol	65.45884 ± 0.00095	2696-92-6*0
Carbon dioxide		49.8	50.6	± 1.1	kJ/mol	44.00950 ± 0.00100	124-38-9*1
Trioxidanylium		1070.6	1064.3	± 1.4	kJ/mol	49.00559 ± 0.00090	74241-49-9*1
Methane cation		1150.83	1144.45	± 0.25	kJ/mol	16.04191 ± 0.00085	20741-88-2*0
Chlorine difluoride		-47.1	-48.2	± 1.4	kJ/mol	73.44951 ± 0.00090	24801-48-7*0
Ethanium		874.34	858.10	± 0.62	kJ/mol	31.0764 ± 0.0017	24669-33-8*0
Bifluoride		-481.8	-480.6	± 1.9	kJ/mol	39.005295 ± 0.000070	18130-74-02
Acetylene cation		1328.83	1328.17	± 0.13	kJ/mol	26.0367 ± 0.0016	25641-79-6*0
Vinylidene		411.24	412.16	± 0.33	kJ/mol	26.0373 ± 0.0016	2143-69-3*0
1-Ethylium-1-ylidene		1329.6	1328.2	± 1.2	kJ/mol	27.0447 ± 0.0016	78949-84-5*0
Ethylidyne anion		457.0	452.9	± 1.2	kJ/mol	27.0458 ± 0.0016	117768-70-4*0
Vinylidene anion		364.13	363.95	± 0.63	kJ/mol	26.0378 ± 0.0016	66295-36-1*0
Ethynylium		1687.57	1690.91	± 0.16	kJ/mol	25.0288 ± 0.0016	16456-59-0*0
Bromide			-120.97	± 0.15	kJ/mol	79.90455 ± 0.00100	24959-67-9*800
Methyloxoniumylidene		1062.70	1054.89	± 0.75	kJ/mol	31.03337 ± 0.00088	58157-09-8*0
Hydrogen chloride			-165.757	± 0.025	kJ/mol	36.46064 ± 0.00090	7647-01-0*828
Hydroxymethylene		131.09	127.34	± 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
Azide		193.50	190.00	± 0.91	kJ/mol	42.02077 ± 0.00021	14343-69-2*0
Oxoniumyl ion		978.467	975.564	± 0.028	kJ/mol	18.01473 ± 0.00033	56583-62-1*0
Isoformyl		217.26	217.64	± 0.69	kJ/mol	29.01804 ± 0.00086	71080-92-7*0
Hydrogen fluoride			-321.09	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*820
Dioxidenium		1110.87	1107.98	± 0.11	kJ/mol	33.00619 ± 0.00060	12207-52-2*0
1-Methylethylidene		316.5	302.6	± 2.1	kJ/mol	42.0797 ± 0.0024	40852-89-9*2
Propylidene		349.5	335.8	± 1.4	kJ/mol	42.0797 ± 0.0024	6700-78-3*1
Allylium		964.59	953.03	± 0.45	kJ/mol	41.0713 ± 0.0024	1724-44-3*0
1-Propenyl		280.27	269.44	± 0.80	kJ/mol	41.0718 ± 0.0024	6067-68-1*1
1H-Triazirin-1-yl		585.9	584.1	± 2.0	kJ/mol	42.02022 ± 0.00021	912535-95-6*0
Propargylium		1193.45	1190.63	± 0.38	kJ/mol	39.0554 ± 0.0024	21540-27-2*0
Cycloprop-1-enyl		527.53	523.14	± 0.67	kJ/mol	39.0559 ± 0.0024	19528-44-0*0
n-Butyl anion		105.8	80.9	± 1.3	kJ/mol	57.1148 ± 0.0033	79431-01-9*0
sec-Butyl anion		103.0	78.5	± 1.3	kJ/mol	57.1148 ± 0.0033	79431-00-8*0
Cyclobutane		52.36	27.82	± 0.41	kJ/mol	56.1063 ± 0.0032	287-23-0*0
Cyclopentene		59.36	35.10	± 0.46	kJ/mol	68.1170 ± 0.0040	142-29-0*0
n-Heptane		-145.65	-187.52	± 0.48	kJ/mol	100.2019 ± 0.0057	142-82-5*0
n-Octane		-161.40	-208.23	± 0.67	kJ/mol	114.2285 ± 0.0065	111-65-9*0
Iodide			-56.827	± 0.089	kJ/mol	126.905019 ± 0.000030	20461-54-5*800
1-Hydroxyethylium		610.9	596.5	± 1.3	kJ/mol	45.0600 ± 0.0017	18682-96-7*2
Ethenol		-108.22	-119.01	± 0.77	kJ/mol	44.0526 ± 0.0017	557-75-5*2
Vinyl alcohol cation		778.9	767.6	± 1.4	kJ/mol	44.0520 ± 0.0017	57239-63-1*2
Oxiranyl		172.6	164.3	± 1.4	kJ/mol	43.0446 ± 0.0016	31586-84-2*0
Oxiranylium		901.2	893.2	± 1.5	kJ/mol	43.0441 ± 0.0016	57789-76-1*2
C=O=C		653.2	657.5	± 1.7	kJ/mol	40.0208 ± 0.0016	12071-23-71
C=O=C		721.0	725.4	± 1.7	kJ/mol	40.0208 ± 0.0016	12071-23-72
Oxoethylidene		275.5	272.7	± 1.9	kJ/mol	42.0367 ± 0.0016	39920-84-8*2
Fluoride			-334.49	± 0.16	kJ/mol	18.99895178 ± 0.00000050	16984-48-8*800
Formic acid cation		721.90	714.81	± 0.26	kJ/mol	46.0248 ± 0.0010	50614-05-6*1
Formyloxidanyl		-122.00	-125.35	± 0.56	kJ/mol	45.0174 ± 0.0010	16499-21-1*2
1-Propanol		-231.42	-255.26	± 0.25	kJ/mol	60.0950 ± 0.0025	71-23-8*0
Fulminic acid		170.92	169.46	± 0.49	kJ/mol	43.02478 ± 0.00086	51060-05-0*0
Water anion		31.3	29.8	± 3.1	kJ/mol	18.01583 ± 0.00033	12259-30-2*100
(Formyloxy)methyl		-136.2	-144.4	± 1.4	kJ/mol	59.0440 ± 0.0017	3122-12-1*2
Carboxymethyl		-206.5	-215.8	± 1.3	kJ/mol	59.0440 ± 0.0017	2887-46-9*2
Dimethylamide		122.1	103.7	± 1.7	kJ/mol	44.0763 ± 0.0017	34285-60-4*0
Chloryl hydride		197.6	191.2	± 1.6	kJ/mol	68.4594 ± 0.0011	174365-32-3*0
1,1,2-Trichloroethane		-136.6	-148.3	± 1.4	kJ/mol	133.4033 ± 0.0031	79-00-5*0
1,1,1,2-Tetrachloroethane		-144.6	-153.1	± 1.3	kJ/mol	167.8481 ± 0.0039	630-20-6*0
Pentachloroethyl		26.9	25.0	± 1.3	kJ/mol	201.2849 ± 0.0048	7094-17-9*0
Oxygen atom		246.844	249.229	± 0.0021	kJ/mol	15.99940 ± 0.00030	17778-80-2*1
Iodomethane			-12.25	± 0.20	kJ/mol	141.93899 ± 0.00083	74-88-4*590
Difluoromethylene		43.26	43.97	± 0.38	kJ/mol	50.00751 ± 0.00080	2154-59-8*1
Fluoromethyliumylidene		1122.85	1126.06	± 0.46	kJ/mol	31.00855 ± 0.00080	33412-11-2*0
Iodine atom cation		1115.549	1115.149	± 0.0062	kJ/mol	126.903921 ± 0.000030	22541-93-1*0
Ethyl iodide		-9.40	-39.27	± 0.49	kJ/mol	155.9656 ± 0.0016	75-03-6*500
1,2-Difluoroacetylene		2.86	5.68	± 0.66	kJ/mol	62.0182 ± 0.0016	689-99-6*0
Fluoro(fluorooxy)methylene		-134.8	-136.0	± 1.3	kJ/mol	66.00691 ± 0.00085	479587-30-9*2
Dibromophosgene		-97.99	-113.92	± 0.37	kJ/mol	187.8181 ± 0.0022	593-95-3*0
Benzene		50.71	49.17	± 0.23	kJ/mol	78.1118 ± 0.0048	71-43-2*500
o-Benzyne		468.03	459.11	± 0.88	kJ/mol	76.0960 ± 0.0048	462-80-6*0
Hydrogen difluoride		-198.5	-198.4	± 1.2	kJ/mol	39.004746 ± 0.000070	12528-21-1*1
m-Benzyne		526.9	518.5	± 1.2	kJ/mol	76.0960 ± 0.0048	1828-89-3*2
p-Benzyne		587.0	577.5	± 1.2	kJ/mol	76.0960 ± 0.0048	3355-34-8*2
Cycloheptane		-72.81	-118.30	± 0.53	kJ/mol	98.1861 ± 0.0057	291-64-5*0
Phenoxy		71.10	55.81	± 0.88	kJ/mol	93.1033 ± 0.0048	2122-46-5*0
Benzoyl fluoride		-288.1	-304.6	± 1.5	kJ/mol	124.1124 ± 0.0056	455-32-3*0
Iodobenzene		177.7	161.7	± 1.0	kJ/mol	204.0084 ± 0.0048	591-50-4*0
2-Cyclopropen-1-one		163.8	159.9	± 1.2	kJ/mol	54.0474 ± 0.0024	2961-80-0*0
Hydroxyaminylium		1019.6	1012.4	± 2.5	kJ/mol	32.02147 ± 0.00034	66097-71-0*1
Dioxyamidogen		240.4	233.8	± 1.8	kJ/mol	47.01348 ± 0.00061	71843-95-3*2
Peroxynitrous acid		-0.19	-7.24	± 0.53	kJ/mol	63.01288 ± 0.00091	14691-52-2*2
Dioxiranylidene		190.3	191.1	± 1.4	kJ/mol	44.00950 ± 0.00100	138832-57-2*0
Chlorine difluoride cation		998.9	996.7	± 1.7	kJ/mol	73.44896 ± 0.00090	32629-46-2*0
Methylidyne		592.824	596.159	± 0.099	kJ/mol	13.01864 ± 0.00080	3315-37-5*1
Dinitrogen tetraoxide		20.15	10.86	± 0.14	kJ/mol	92.0111 ± 0.0012	10544-72-6*0
Bifluoride		-68.0	-67.6	± 1.6	kJ/mol	39.005295 ± 0.000070	18130-74-01
Methylammonium		628.1	609.2	± 1.4	kJ/mol	32.06453 ± 0.00091	17000-00-9*0
Aminomethylene		245.9	238.1	± 1.5	kJ/mol	29.04126 ± 0.00083	35430-17-2*0
Methyleneamidogen anion		192.71	188.96	± 0.96	kJ/mol	28.03387 ± 0.00082	28892-56-0*0
(Z)-Iminomethyl		294.50	291.01	± 0.91	kJ/mol	28.03332 ± 0.00082	54980-11-9*0
Aminomethylidyne		371.9	368.3	± 1.1	kJ/mol	28.03332 ± 0.00082	84654-89-7*0
Oxofluoronium		1342.64	1342.59	± 0.81	kJ/mol	34.99725 ± 0.00030	12763-67-6*0
Oxywater		64.9	58.4	± 1.3	kJ/mol	34.01468 ± 0.00062	171363-09-0*0
Oxygen cation monohydrate		1153.4	1147.9	± 3.2	kJ/mol	34.01413 ± 0.00062	31748-17-10
Oxygen anion monohydrate		-239.0	-244.3	± 3.0	kJ/mol	34.01523 ± 0.00062	31748-17-1*0
Methyleneoxonium		152.45	144.13	± 0.49	kJ/mol	32.04186 ± 0.00090	177788-17-9*0
Hydroxymethylene anion		147.1	144.1	± 1.6	kJ/mol	30.02653 ± 0.00087	207914-87-2*1
Hydroxymethyliumylidene		986.02	987.66	± 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		-265.3	-273.3	± 1.6	kJ/mol	62.0248 ± 0.0012	107-32-4*2
Hydroxyoxomethoxy		-358.8	-365.0	± 1.5	kJ/mol	61.0168 ± 0.0012	38330-85-7*0
Hydroperoxycarbonyl		-72.9	-76.8	± 1.7	kJ/mol	61.0168 ± 0.0012	153751-35-0*0
Hydrogen fluoride			-321.12	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*821
Propan-1-yl-3-ylidene		554.3	545.6	± 1.4	kJ/mol	41.0718 ± 0.0024	50457-59-52
Chlorine chlorite		168.6	166.2	± 1.3	kJ/mol	102.9042 ± 0.0019	105206-44-8*3
Cycloprop-2-enyl		490.25	485.70	± 0.64	kJ/mol	39.0559 ± 0.0024	28933-84-8*0
Cyclopropenylidene		497.06	496.11	± 0.46	kJ/mol	38.0480 ± 0.0024	16165-40-5*0
2-Propynylidyne anion		540.01	544.78	± 0.84	kJ/mol	37.0406 ± 0.0024	82893-67-2*0
Cyclopropynyl		710.9	715.0	± 1.1	kJ/mol	37.0400 ± 0.0024	119178-99-3*0
Deuterium atom		219.804	221.717	± 0.000	kJ/mol	2.01410177800 ± 0.00000000040	16873-17-9*0
t-Butylium		733.89	710.61	± 0.98	kJ/mol	57.1137 ± 0.0033	14804-25-2*0
t-Butyl anion		76.4	51.6	± 1.5	kJ/mol	57.1148 ± 0.0033	65114-21-8*0
iso-Butyl		97.18	73.20	± 0.76	kJ/mol	57.1143 ± 0.0033	4630-45-9*0
Methylcyclopropane		47.7	24.5	± 1.3	kJ/mol	56.1063 ± 0.0032	594-11-6*0
Cyclobutene		177.00	159.95	± 0.93	kJ/mol	54.0904 ± 0.0032	822-35-5*0
Chlorosyl hydride		141.9	139.1	± 1.7	kJ/mol	52.46004 ± 0.00095	71572-35-5*0
2-Hydroxyethyl		-5.1	-17.5	± 1.3	kJ/mol	45.0605 ± 0.0017	4422-54-2*3
Vinyl alcohol cation		787.12	775.89	± 0.93	kJ/mol	44.0520 ± 0.0017	57239-63-1*1
Vinoxy		22.62	15.78	± 0.86	kJ/mol	43.0446 ± 0.0016	6912-06-7*0
Vinoxy cation		1020.1	1013.0	± 1.5	kJ/mol	43.0441 ± 0.0016	35731-40-91
Vinoxide		-153.38	-160.43	± 0.86	kJ/mol	43.0452 ± 0.0016	35731-40-9*0
Oxiranyl anion		121.1	113.1	± 1.6	kJ/mol	43.0452 ± 0.0016	72722-59-9*2
Aquachlorine cation		821.8	815.0	± 1.7	kJ/mol	53.46743 ± 0.00096	142599-65-3*0
Acetic acid			-485.17	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*800
COC vdW		590.0	598.7	± 1.7	kJ/mol	40.0208 ± 0.0016	12071-24-81
(E)-Diazene cation		1132.46	1125.53	± 0.66	kJ/mol	30.02881 ± 0.00020	59952-06-6*0
2-Hydrotrioxy cation		1297.9	1291.3	± 1.5	kJ/mol	49.00559 ± 0.00090	74241-49-90
Oxirene		389.8	385.7	± 1.7	kJ/mol	42.0367 ± 0.0016	157-18-6*12
(Z)-Diazene	$[H]/N=N\[H]$	228.81	221.68	± 0.64	kJ/mol	30.02936 ± 0.00020	15626-42-3*0
Triiodide			-51.25	± 0.80	kJ/mol	380.713959 ± 0.000090	14900-04-0*800
Formyloxoniumylidene		1017.2	1013.7	± 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-Propanol		-249.47	-273.57	± 0.38	kJ/mol	60.0950 ± 0.0025	67-63-0*0
2-Hydrotrioxy anion		27.5	21.8	± 1.4	kJ/mol	49.00669 ± 0.00090	89965-38-80
Cyanate		-221.10	-221.32	± 0.54	kJ/mol	42.01739 ± 0.00086	661-20-1*0
Nitrosomethylidyne		389.5	390.8	± 1.5	kJ/mol	42.01684 ± 0.00086	82267-15-0*0
Oxazirinyl		449.9	450.7	± 1.5	kJ/mol	42.01684 ± 0.00086	228850-18-8*0
Hydrogen difluoride cation		1174.3	1171.3	± 1.5	kJ/mol	39.004198 ± 0.000070	126950-54-70
2-Methoxy-2-oxoethyl		-203.4	-218.6	± 1.6	kJ/mol	73.0706 ± 0.0025	54668-31-4*1
(Acetyloxy)methyl		-200.6	-214.3	± 1.6	kJ/mol	73.0706 ± 0.0025	2887-49-2*1
Dimethylmethyleneammonium		695.9	670.8	± 1.4	kJ/mol	58.1018 ± 0.0025	28149-27-1*0
Trichloromethide		-125.0	-124.4	± 2.0	kJ/mol	118.3693 ± 0.0028	14478-07-0*0
1,1,2,2-Tetrachloroethane		-146.9	-156.3	± 1.5	kJ/mol	167.8481 ± 0.0039	79-34-5*0
1,1,2,2-Tetrachloroethane		-173.1	-202.0	± 1.5	kJ/mol	167.8481 ± 0.0039	79-34-5*500
Pentachloroethane			-202.9	± 2.5	kJ/mol	202.2928 ± 0.0048	76-01-7*500
Trichloroethene			-49.3	± 1.5	kJ/mol	131.3874 ± 0.0031	79-01-6*590
Tetrachloroethene			-63.0	± 1.1	kJ/mol	165.8322 ± 0.0039	127-18-4*500
Trichloroethene		-11.4	-14.7	± 1.5	kJ/mol	131.3874 ± 0.0031	79-01-6*0
Trioxidaniumyl		925.4	916.2	± 1.5	kJ/mol	50.01353 ± 0.00091	161321-37-5*2
Bromodichloromethane		-37.7	-49.4	± 1.3	kJ/mol	163.8280 ± 0.0022	75-27-4*0
Difluorodibromomethane		-366.1	-383.8	± 1.4	kJ/mol	209.8155 ± 0.0022	75-61-6*0
Dichlorodibromomethane		20.6	4.9	± 1.5	kJ/mol	242.7241 ± 0.0028	594-18-3*0
Difluorobromomethane		-410.66	-423.85	± 0.48	kJ/mol	130.9194 ± 0.0013	1511-62-2*0
Chlorine fluoride cation		1165.52	1165.70	± 0.49	kJ/mol	54.45055 ± 0.00090	12432-44-9*0
1,2-Difluoroethane		-434.53	-447.95	± 0.82	kJ/mol	66.0500 ± 0.0016	624-72-6*0
Dihydrogen fluoride anion		133.2	131.9	± 1.6	kJ/mol	21.01483 ± 0.00014	117339-92-1*1
Fluoro(fluorooxy)methylene		-37.5	-39.1	± 1.4	kJ/mol	66.00691 ± 0.00085	479587-30-9*1
Perchloric acid		13.2	1.8	± 1.8	kJ/mol	100.4582 ± 0.0015	7601-90-3*0
Hydroxyaminiumyl		1161.2	1158.3	± 1.4	kJ/mol	31.01353 ± 0.00032	63559-88-6*0
Phenylium		1251.1	1238.0	± 1.9	kJ/mol	77.1034 ± 0.0048	17333-73-2*1
Peroxychlorous acid		96.2	90.2	± 2.1	kJ/mol	84.4588 ± 0.0013	177778-92-6*1
Nitrosodioxaziridine		413.6	407.6	± 1.8	kJ/mol	76.01168 ± 0.00091	132871-99-9*1
Chlorobenzene cation		942.48	928.55	± 0.61	kJ/mol	112.5561 ± 0.0049	55450-32-3*0
Chlorobenzene			11.23	± 0.59	kJ/mol	112.5566 ± 0.0049	108-90-7*500
Bromobenzene cation		994.8	973.2	± 1.3	kJ/mol	157.0074 ± 0.0049	55450-33-4*0
Iodobenzene		112.8	112.9	± 1.1	kJ/mol	204.0084 ± 0.0048	591-50-4*500
Nitrobenzene		81.4	61.4	± 1.4	kJ/mol	123.1094 ± 0.0049	98-95-3*0
Fluorohydrochlorine cation		975.3	972.3	± 2.0	kJ/mol	55.45849 ± 0.00090	70110-64-4*0
Methyl nitrite		-55.67	-66.34	± 0.46	kJ/mol	61.0401 ± 0.0010	624-91-9*0
1,3-Butadien-2-ol		-53.8	-70.8	± 1.6	kJ/mol	70.0898 ± 0.0032	59120-04-6*11
Hydroxyamidogen		123.5	116.9	± 1.7	kJ/mol	32.02202 ± 0.00034	13940-32-4*2
Chlorosyl chloride		134.5	133.2	± 1.4	kJ/mol	86.9048 ± 0.0018	86825-56-1*0
Ethylene cation		1075.20	1067.98	± 0.12	kJ/mol	28.0526 ± 0.0016	34470-02-5*0
Hydroxyimidogen		218.00	215.12	± 0.89	kJ/mol	31.01408 ± 0.00032	35337-59-8*0
Dibromide		-199.2	-213.3	± 2.0	kJ/mol	159.8085 ± 0.0020	12595-70-9*0
Chloride			-166.991	± 0.023	kJ/mol	35.45325 ± 0.00090	16887-00-6*800
Nitrous acid		-71.39	-77.74	± 0.26	kJ/mol	47.01348 ± 0.00061	7782-77-6*2
Iminomethyl anion		237.4	233.5	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*1
Cyanogen iodide anion		86.5	88.8	± 8.1	kJ/mol	152.92246 ± 0.00080	1356929-44-6*0
Formaldehyde cation		944.859	941.238	± 0.099	kJ/mol	30.02543 ± 0.00087	54288-05-0*0
Trihydrogen dioxide anion		-487.5	-495.8	± 1.1	kJ/mol	35.02317 ± 0.00064	12501-19-8*0
Azanylium		1266.56	1264.49	± 0.11	kJ/mol	16.02207 ± 0.00016	15194-15-7*0
Isoformyl anion		267.4	268.0	± 1.6	kJ/mol	29.01859 ± 0.00086	81747-63-9*2
Dioxygen		94.410	94.383	± 0.000	kJ/mol	31.99880 ± 0.00060	7782-44-7*2
Ammonia			-80.886	± 0.053	kJ/mol	17.03056 ± 0.00022	7664-41-7*1000
Hydroxydioxonitrate		-193.2	-197.6	± 2.4	kJ/mol	63.01343 ± 0.00091	58875-09-5*0
1-Propynyl		528.16	525.99	± 0.84	kJ/mol	39.0559 ± 0.0024	89342-91-6*0
Ammonium nitrate		-350.29	-365.26	± 0.18	kJ/mol	80.04344 ± 0.00095	6484-52-2*500
2-Propen-1-yl-3-ylidene		556.7	554.4	± 1.3	kJ/mol	39.0559 ± 0.0024	202744-74-9*0
2-Cyclopropen-1-ylium-1-yl		1382.0	1381.0	± 1.1	kJ/mol	38.0474 ± 0.0024	85398-75-0*0
Propynylidene		597.6	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
Fluoronium		774.10	771.16	± 0.88	kJ/mol	21.01373 ± 0.00014	12206-67-6*0
Fluoronium		1490.1	1491.5	± 1.9	kJ/mol	21.01373 ± 0.00014	12206-67-6*1
Chlorohydrofluorine cation		1000.8	998.1	± 2.1	kJ/mol	55.45849 ± 0.00090	70110-63-3*0
Ethyloxoniumyl		783.3	766.4	± 1.7	kJ/mol	46.0679 ± 0.0017	34480-55-2*0
1-Hydroxyethylium		608.82	594.40	± 0.40	kJ/mol	45.0600 ± 0.0017	18682-96-7*0
2-Hydroxyethylium		1019.2	1006.4	± 1.6	kJ/mol	45.0600 ± 0.0017	38607-31-7*3
Oxochloronium		1150.86	1150.69	± 0.66	kJ/mol	51.45155 ± 0.00095	12301-79-0*0
Ethyloxoniumylidene		988.8	975.1	± 1.5	kJ/mol	45.0600 ± 0.0017	54387-07-4*0
Acetaldehyde cation		831.85	821.88	± 0.27	kJ/mol	44.0520 ± 0.0017	36505-03-0*0
Oxiranylium		1233.4	1226.4	± 1.7	kJ/mol	43.0441 ± 0.0016	57789-76-1*1
Oxiranyl anion		140.8	134.8	± 1.6	kJ/mol	43.0452 ± 0.0016	72722-59-9*1
Ketene		-45.35	-48.46	± 0.12	kJ/mol	42.0367 ± 0.0016	463-51-4*2
Ketenyl anion		-48.39	-47.46	± 0.84	kJ/mol	41.0293 ± 0.0016	64066-01-9*0
Dicarbon monoxide anion		154.34	157.98	± 0.98	kJ/mol	40.0213 ± 0.0016	87191-88-6*0
Dicarbon monoxide		440.38	444.71	± 0.98	kJ/mol	40.0208 ± 0.0016	12071-23-7*2
COC vdW		726.4	734.8	± 1.8	kJ/mol	40.0208 ± 0.0016	12071-24-82
C=O-C cation		1576.2	1583.3	± 2.4	kJ/mol	40.0203 ± 0.0016	83483-98-1*1
C=O=C anion		550.4	554.2	± 2.2	kJ/mol	40.0213 ± 0.0016	87191-88-60
Azidonitrene		692.1	687.5	± 1.4	kJ/mol	56.02696 ± 0.00028	147363-92-6*2
Oxirene cation		1106.3	1102.6	± 2.0	kJ/mol	42.0361 ± 0.0016	94664-69-4*0
Ethynol		400.2	397.7	± 2.0	kJ/mol	42.0367 ± 0.0016	32038-79-2*11
Oxoethylidene		266.0	262.7	± 1.9	kJ/mol	42.0367 ± 0.0016	39920-84-8*11
Hydrogen fluoride			-321.15	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*822
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
Nitronium		961.78	958.23	± 0.20	kJ/mol	46.00499 ± 0.00060	14522-82-8*0
Isocyanic acid cation		1003.10	1000.43	± 0.51	kJ/mol	43.02423 ± 0.00086	444010-28-0*0
Fulminic acid cation		1215.8	1213.0	± 1.3	kJ/mol	43.02423 ± 0.00086	114766-65-3*0
Peroxyimidogen		405.4	403.4	± 1.9	kJ/mol	46.00554 ± 0.00060	60488-31-50
Acetic acid			-484.90	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*840
Chlorite		-105.62	-107.79	± 0.35	kJ/mol	67.4520 ± 0.0011	14998-27-7*0
Acetyl chloride			-272.15	± 0.33	kJ/mol	78.4973 ± 0.0019	75-36-5*500
2-Methoxy-2-oxoethyl		-173.3	-188.4	± 1.8	kJ/mol	73.0706 ± 0.0025	54668-31-4*2
(Acetyloxy)methyl		-174.2	-187.3	± 1.8	kJ/mol	73.0706 ± 0.0025	2887-49-2*2
Glyoxal		-206.91	-212.55	± 0.52	kJ/mol	58.0361 ± 0.0017	107-22-2*1
Hydrogen fluoride			-321.04	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*902
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
Isocyanomethylidyne		672.2	676.6	± 1.7	kJ/mol	38.0281 ± 0.0016	53590-27-5*0
Cyanomethylidyne		685.4	689.8	± 2.1	kJ/mol	38.0281 ± 0.0016	4120-02-9*0
NON		545.5	542.6	± 1.7	kJ/mol	44.01288 ± 0.00033	227934-46-5*0
Tetrachloromethane		-108.74	-128.15	± 0.44	kJ/mol	153.8215 ± 0.0037	56-23-5*500
Fluorosyl fluoride		192.6	193.1	± 2.3	kJ/mol	53.99621 ± 0.00030	86825-57-2*1
Dihydrogen fluoride anion		-257.0	-260.1	± 1.9	kJ/mol	21.01483 ± 0.00014	117339-92-12
Dichloromethylene anion		75.62	77.90	± 0.78	kJ/mol	82.9166 ± 0.0020	118364-73-1*0
Dichloromethylium		894.6	891.4	± 1.2	kJ/mol	83.9235 ± 0.0020	56932-33-3*0
Dichloromethide		-41.2	-42.9	± 2.0	kJ/mol	83.9246 ± 0.0020	32180-91-9*0
Chloromethylium		962.3	958.4	± 1.2	kJ/mol	49.4787 ± 0.0012	59000-00-9*0
Chloromethylene		346.14	346.44	± 0.89	kJ/mol	48.4713 ± 0.0012	2108-20-5*1
1,2-Dichloroethane			-165.73	± 0.56	kJ/mol	98.9586 ± 0.0024	107-06-2*500
1,1-Dichloroethane			-163.90	± 0.48	kJ/mol	98.9586 ± 0.0024	75-34-3*500
Bromo hypobromite		120.1	103.6	± 1.4	kJ/mol	175.8074 ± 0.0020	21308-80-5*0
Pentachloroethane		-151.3	-157.2	± 1.9	kJ/mol	202.2928 ± 0.0048	76-01-7*0
Diazenide		175.7	176.7	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*100
Chloroform			-133.81	± 0.52	kJ/mol	119.3767 ± 0.0028	67-66-3*590
Chlorodibromomethane		18.6	-0.2	± 3.4	kJ/mol	208.2793 ± 0.0023	124-48-1*0
Tribromofluoromethane		-107.3	-131.3	± 1.6	kJ/mol	270.7211 ± 0.0031	353-54-8*0
Tribromochloromethane		77.1	54.3	± 1.6	kJ/mol	287.1754 ± 0.0032	594-15-0*0
Trifluoromethide		-637.7	-639.6	± 1.8	kJ/mol	69.00646 ± 0.00080	54128-17-5*0
Carbide		504.70	511.27	± 0.39	kJ/mol	24.0219 ± 0.0016	12595-78-7*0
Bromochloromethane		-28.7	-42.7	± 1.3	kJ/mol	129.3833 ± 0.0016	74-97-5*0
Dioxygenyl ion monohydrate		828.5	821.4	± 2.1	kJ/mol	50.01353 ± 0.00091	11083-61-7*0
Diiodide		-178.13	-180.72	± 0.48	kJ/mol	253.809489 ± 0.000060	12190-71-5*0
Fluoromethylene		148.37	148.66	± 0.43	kJ/mol	32.01704 ± 0.00080	13453-52-6*0
Iodine atom		107.157	106.757	± 0.0021	kJ/mol	126.904470 ± 0.000030	14362-44-8*1
Ethyl iodide		8.71	-7.17	± 0.49	kJ/mol	155.9656 ± 0.0016	75-03-6*0
1,2-Dibromoacetylene		332.3	321.4	± 2.3	kJ/mol	183.8294 ± 0.0026	624-61-3*0
Fluoro(fluorooxy)methylene		-97.5	-95.7	± 1.6	kJ/mol	66.00691 ± 0.00085	479587-30-9*101
Fluorochlorate		-256.03	-255.42	± 0.81	kJ/mol	54.45165 ± 0.00090	12272-56-9*0
Fluorooxomethylium		724.9	724.5	± 1.2	kJ/mol	47.00795 ± 0.00085	38264-00-5*0
Fluoroisoformyl		-37.8	-32.4	± 1.6	kJ/mol	47.00850 ± 0.00085	1871-24-50
Benzene cation		992.50	976.04	± 0.23	kJ/mol	78.1113 ± 0.0048	34504-50-2*0
2-Cyclopropyn-1-ylidene		898.9	905.8	± 1.6	kJ/mol	36.0321 ± 0.0024	102508-15-6*1
Peroxychlorite		-34.3	-34.3	± 2.0	kJ/mol	83.4514 ± 0.0013	852472-63-0*0
Hydrogen fluoride			-321.10	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*904
Triiodide		-254.3	-257.5	± 3.4	kJ/mol	380.713959 ± 0.000090	14900-04-0*0
2-Cyclopropyn-1-ylium-1-yl		1944.7	1952.6	± 1.9	kJ/mol	36.0316 ± 0.0024	154702-35-9*0
Hydrogen difluoride		-187.4	-187.1	± 1.6	kJ/mol	39.004746 ± 0.000070	12528-21-1*2
2-Oxopropylium		784.4	770.6	± 1.8	kJ/mol	57.0707 ± 0.0024	54088-52-7*0
1-Chloro ozone		226.3	223.1	± 2.3	kJ/mol	83.4509 ± 0.0013	141801-66-3*101
1,2-Dibromoethane		-11.7	-38.6	± 1.3	kJ/mol	187.8612 ± 0.0026	106-93-4*0
2-Butanone		-216.97	-238.42	± 0.92	kJ/mol	72.1057 ± 0.0033	78-93-3*0
2-Propynal		135.5	133.2	± 1.4	kJ/mol	54.0474 ± 0.0024	624-67-9*0
Azanylium		944.272	937.318	± 0.030	kJ/mol	17.03001 ± 0.00022	19496-55-0*0
Cyanomethanide		114.1	111.2	± 1.1	kJ/mol	40.0446 ± 0.0016	21438-99-3*0
Nitrous acid		-73.005	-78.662	± 0.079	kJ/mol	47.01348 ± 0.00061	7782-77-6*0
Methyleneoxonium cation		827.7	818.3	± 1.7	kJ/mol	32.04131 ± 0.00090	177788-17-90
Hydroxymethanide		9.3	2.7	± 1.7	kJ/mol	31.03447 ± 0.00088	55830-71-2*0
Formaldehyde		-105.382	-109.221	± 0.098	kJ/mol	30.02598 ± 0.00087	50-00-0*2
Hydroxymethylene cation		986.3	982.7	± 1.6	kJ/mol	30.02543 ± 0.00087	135395-06-1*2
Hydroxymethylene cation		1482.1	1479.4	± 1.9	kJ/mol	30.02543 ± 0.00087	135395-06-1*3
Hydroxymethylene anion		160.2	157.5	± 1.7	kJ/mol	30.02653 ± 0.00087	207914-87-2*2
Hydroxymethylene anion		334.0	334.8	± 2.1	kJ/mol	30.02653 ± 0.00087	207914-87-2*3
Aquacarbon		467.6	465.5	± 1.9	kJ/mol	30.02598 ± 0.00087	81434-73-3*102
Aquacarbon cation		1196.1	1193.0	± 1.7	kJ/mol	30.02543 ± 0.00087	81434-73-30
Bifluoride		-705.22	-709.07	± 0.36	kJ/mol	39.005295 ± 0.000070	18130-74-0*0
Fluorodioxidenium		1221.9	1219.5	± 2.0	kJ/mol	50.99665 ± 0.00060	139584-95-5*0
Perchloryloxy		248.6	241.0	± 1.8	kJ/mol	99.4503 ± 0.0015	12133-63-0*0
Carbonic acid		-602.74	-612.05	± 0.75	kJ/mol	62.0248 ± 0.0012	463-79-6*0
Aminyliumyl		1659.04	1659.96	± 0.24	kJ/mol	15.014131 ± 0.000099	19067-62-0*0
Peroxyformic acid		-265.3	-273.1	± 1.5	kJ/mol	62.0248 ± 0.0012	107-32-4*3
Hydroxyaminylium		1048.6	1041.4	± 2.6	kJ/mol	32.02147 ± 0.00034	66097-71-0*2
1-Chloro ozone anion		-66.8	-68.7	± 2.1	kJ/mol	83.4514 ± 0.0013	224299-15-4*1
1-Methylethylidene		327.0	313.9	± 1.6	kJ/mol	42.0797 ± 0.0024	40852-89-9*1
Xenon cation		1170.354	1170.354	± 0.0062	kJ/mol	131.2895 ± 0.0200	24203-25-6*0
Hydrogen fluoride			-321.17	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*823
Ethane cation		1043.19	1029.18	± 0.60	kJ/mol	30.0685 ± 0.0017	34488-65-8*0
Chlorine difluoride anion		-504.9	-505.8	± 1.9	kJ/mol	73.45005 ± 0.00090	16892-05-0*0
Propynylidene cation		1410.8	1413.4	± 1.3	kJ/mol	38.0474 ± 0.0024	75123-91-0*0
Hydrogen bromide			-120.49	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*834
Propynylidene		597.4	599.2	± 1.1	kJ/mol	38.0480 ± 0.0024	67152-18-5*4
Propadienylidenide		381.15	382.05	± 0.42	kJ/mol	38.0485 ± 0.0024	109292-49-1*0
1,2-Propadien-1-ylium-1-yl		1561.7	1562.9	± 1.4	kJ/mol	38.0474 ± 0.0024	110714-00-6*0
Nitric acid			-206.32	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*839
Nitric acid		-179.02	-173.29	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*500
Hydrogen fluoride			-302.39	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*590
Hydroxyamidogen anion		90.8	84.9	± 2.8	kJ/mol	32.02257 ± 0.00034	66097-71-00
Hydrogen bromide			-120.78	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*844
n-Pentane		-156.04	-173.01	± 0.31	kJ/mol	72.1488 ± 0.0041	109-66-0*500
iso-Pentane			-178.43	± 0.44	kJ/mol	72.1488 ± 0.0041	78-78-4*500
neo-Pentane			-189.89	± 0.40	kJ/mol	72.1488 ± 0.0041	463-82-1*500
Cyclopentane			-105.22	± 0.41	kJ/mol	70.1329 ± 0.0041	287-92-3*590
Hydrogen chloride			-166.683	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*841
Azidonitrene		660.8	657.6	± 1.6	kJ/mol	56.02696 ± 0.00028	147363-92-6*1
1,5-Hexadiene		108.38	83.79	± 0.40	kJ/mol	82.1436 ± 0.0049	592-42-7*0
Ethylene anion		232.0	224.4	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*1
Ethoxy		1.51	-11.92	± 0.48	kJ/mol	45.0605 ± 0.0017	2154-50-9*0
Chlorine difluoride		22.5	23.8	± 1.9	kJ/mol	73.44951 ± 0.00090	91483-78-2*0
Fluorosyl fluoride anion		-147.2	-146.9	± 3.0	kJ/mol	53.99675 ± 0.00030	86825-57-22
Dicarbon monoxide cation		1434.0	1439.1	± 2.2	kJ/mol	40.0203 ± 0.0016	12287-08-0*0
C=O-C cation		1813.0	1817.0	± 2.4	kJ/mol	40.0203 ± 0.0016	83483-98-1*2
Nitrosyl fluoride		-85.81	-88.18	± 0.93	kJ/mol	49.00454 ± 0.00031	7789-25-5*0
Oxirene anion		288.2	285.3	± 2.3	kJ/mol	42.0372 ± 0.0016	157-18-60
(E)-Diazene anion		265.5	258.7	± 2.0	kJ/mol	30.02991 ± 0.00020	59952-06-60
Oxoethylidene		261.2	258.4	± 1.6	kJ/mol	42.0367 ± 0.0016	39920-84-8*1
(Z)-Diazene cation	$[H]/N=[N+]\[H]$	1157.0	1150.1	± 1.3	kJ/mol	30.02881 ± 0.00020	86631-37-0*0
Formic acid anion		-241.2	-246.9	± 1.9	kJ/mol	46.0259 ± 0.0010	19066-82-1*2
Dioxirane cation		1050.8	1043.2	± 2.0	kJ/mol	46.0248 ± 0.0010	232262-10-1*0
Dioxymethyl cation		1074.9	1068.6	± 1.8	kJ/mol	46.0248 ± 0.0010	232262-11-2*0
Trioxidanyl		26.30	23.02	± 0.19	kJ/mol	49.00614 ± 0.00090	12500-78-6*2
Hydrogen chloride			-165.557	± 0.026	kJ/mol	36.46064 ± 0.00090	7647-01-0*825
Dioxymethylene		341.8	339.8	± 3.0	kJ/mol	45.0174 ± 0.0010	438586-67-5*2
OH-CO vdW complex		-80.26	-76.54	± 0.88	kJ/mol	45.0174 ± 0.0010	2564-85-4100
CO-HO vdW complex		-77.4	-73.2	± 1.3	kJ/mol	45.0174 ± 0.0010	2564-84-3100
Nitrosyl nitrate		70.6	62.3	± 1.8	kJ/mol	92.0111 ± 0.0012	15969-55-80
Dioxaziridinyl cation		1365.9	1363.3	± 1.7	kJ/mol	46.00499 ± 0.00060	66252-29-70
Dioxaziridinyl anion		295.9	293.4	± 1.6	kJ/mol	46.00609 ± 0.00060	66252-31-1*0
Cyanato cation		1261.56	1262.06	± 0.59	kJ/mol	42.01629 ± 0.00086	17247-99-3*0
Nitrosomethyliumylidene		1509.9	1510.9	± 1.9	kJ/mol	42.01629 ± 0.00086	67197-19-7*0
Fulminate		59.2	59.5	± 1.9	kJ/mol	42.01739 ± 0.00086	28269-67-2*0
Acetylene anion		356.8	356.7	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*1
Peroxyimidogen cation		1409.6	1406.8	± 1.9	kJ/mol	46.00499 ± 0.00060	60488-32-60
Acetic acid		-484.09	-483.66	± 0.18	kJ/mol	60.0520 ± 0.0017	64-19-7*500
Acetic acid			-484.70	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*825
Acetic acid			-484.89	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*835
1-Hydrazinylium-1-yl		1143.4	1136.4	± 1.4	kJ/mol	30.02881 ± 0.00020	63986-30-1*0
Tetraoxidanyl		2.0	0.2	± 3.0	kJ/mol	65.0055 ± 0.0012	69696-93-1*100
Peroxyimidogen anion		165.1	162.7	± 1.7	kJ/mol	46.00609 ± 0.00060	60488-31-5*0
Hydrogen fluoride			-321.02	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*901
Nirous oxide cation		1329.67	1326.78	± 0.12	kJ/mol	44.01233 ± 0.00033	12269-46-4*0
Hydrogen fluoride			-320.87	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*815
Glyoxal		-188.52	-193.96	± 0.69	kJ/mol	58.0361 ± 0.0017	107-22-2*2
Glyoxal		-206.91	-212.47	± 0.52	kJ/mol	58.0361 ± 0.0017	107-22-2*0
Dimethylaminylium		1040.0	1024.6	± 1.8	kJ/mol	44.0752 ± 0.0017	49784-85-2*0
Diisocyanogen		610.7	613.0	± 1.7	kJ/mol	52.0349 ± 0.0016	78800-21-2*0
Oxadiazirine anion		95.1	95.5	± 2.9	kJ/mol	44.01343 ± 0.00033	350586-31-1*0
Dichloromethylene		313.61	314.82	± 0.90	kJ/mol	82.9161 ± 0.0020	1605-72-7*1
Dihydrooxooxygen cation		995.0	988.3	± 1.6	kJ/mol	34.01413 ± 0.00062	177329-59-8*0
Chloromethyliumyl		1207.4	1207.6	± 2.0	kJ/mol	48.4708 ± 0.0012	89877-51-0*0
Chloromethylene anion		203.43	204.25	± 0.94	kJ/mol	48.4719 ± 0.0012	75466-08-9*0
Chlorohydroxymethyl		-46.3	-51.9	± 2.0	kJ/mol	65.4787 ± 0.0012	147139-06-8*2
Methylimidogen		323.1	315.4	± 1.7	kJ/mol	29.04126 ± 0.00083	27770-42-9*0
1,1,2-Trichloroethane			-188.6	± 1.4	kJ/mol	133.4033 ± 0.0031	79-00-5*500
1,1,1,2-Tetrachloroethane			-193.5	± 1.1	kJ/mol	167.8481 ± 0.0039	630-20-6*500
Hexachloroethane			-216.5	± 2.8	kJ/mol	236.7376 ± 0.0056	67-72-1*500
Trioxodinitrate anion		-104.3	-107.5	± 1.9	kJ/mol	76.01223 ± 0.00091	194856-62-7*100
trans-1,2-Dichloroethene	$C(\Cl)=C/Cl$	5.29	-0.13	± 0.55	kJ/mol	96.9427 ± 0.0024	156-60-5*0
Diazenide		347.5	344.6	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*1
Trifluoride ion		-348.9	-349.7	± 2.6	kJ/mol	56.9957582 ± 0.0000015	25730-99-8*0
Perchlorate		-263.2	-272.1	± 2.2	kJ/mol	99.4508 ± 0.0015	14797-73-0*0
Dihydrogen cation		1488.364	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*0
Ethynylene cation		1965.20	1971.78	± 0.50	kJ/mol	24.0209 ± 0.0016	12595-79-8*0
Trioxidanylium		1085.3	1079.1	± 1.5	kJ/mol	49.00559 ± 0.00090	74241-49-9*2
Deuterium atom cation		1532.210	1534.123	± 0.000	kJ/mol	2.01355319809 ± 0.00000000040	14464-47-2*0
Fluorochlorobromomethane		-219.3	-231.7	± 5.5	kJ/mol	147.3737 ± 0.0016	593-98-6*0
Iminomethyl anion		252.6	248.9	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*2
Trioxidaniumyl		935.2	926.1	± 1.6	kJ/mol	50.01353 ± 0.00091	161321-37-5*3
Fluoromethyliumyl		1116.6	1116.9	± 1.7	kJ/mol	32.01649 ± 0.00080	89877-52-1*0
Fluoromethylene anion		95.92	96.45	± 0.61	kJ/mol	32.01759 ± 0.00080	71267-42-0*0
Polytetrafluoroethylene			-829.56	± 0.58	kJ/mol	100.0150 ± 0.0016	9002-84-0*591
Fluoroniumyl ion		1275.558	1275.790	± 0.050	kJ/mol	20.005795 ± 0.000070	12381-92-9*0
Hydroxylamine		-15.5	-26.0	± 1.4	kJ/mol	33.02996 ± 0.00037	7803-49-8*2
Dihydrogen fluoride anion		-61.9	-60.5	± 3.2	kJ/mol	21.01483 ± 0.00014	117339-92-1*2
cis-1,2-Difluoroethene	$F/C=C\F$	-302.9	-309.7	± 1.1	kJ/mol	64.0341 ± 0.0016	1630-77-9*0
trans-1,2-Difluoroethene		-299.7	-306.1	± 1.1	kJ/mol	64.0341 ± 0.0016	1630-78-0*0
Hydroxylamine cation		857.6	847.8	± 1.6	kJ/mol	33.02941 ± 0.00037	62675-55-2*0
Chlorine oxide peroxide		226.5	227.4	± 2.5	kJ/mol	83.4509 ± 0.0013	141801-67-4*100
Formyl fluoride cation		816.6	813.3	± 1.3	kJ/mol	48.01589 ± 0.00086	99766-68-4*0
Hydrogen cyanide cation		1442.52	1442.05	± 0.20	kJ/mol	27.02483 ± 0.00081	12601-62-6*0
Formyl fluoride		-405.1	-403.7	± 1.6	kJ/mol	47.00905 ± 0.00085	62227-71-8*0
Fluoroisoformyl cation		1347.4	1349.5	± 1.9	kJ/mol	47.00795 ± 0.00085	1871-25-60
Hydrogen peroxide cation		931.41	924.56	± 0.94	kJ/mol	34.01413 ± 0.00062	12325-10-9*2
1-Chloro ozone anion		-108.9	-111.4	± 2.2	kJ/mol	83.4514 ± 0.0013	224299-15-4*3
o-Benzyne cation		1393.8	1385.8	± 1.7	kJ/mol	76.0954 ± 0.0048	70220-84-7*0
Nitrogen hydride oxide		71.1	59.9	± 1.5	kJ/mol	33.02996 ± 0.00037	38544-48-8*0
m-Benzyne cation		1365.5	1357.0	± 1.9	kJ/mol	76.0954 ± 0.0048	121058-08-0*0
Fluorodioxidanide		-256.9	-256.1	± 1.9	kJ/mol	50.99775 ± 0.00060	23553-17-5*0
p-Benzyne		603.5	594.2	± 1.2	kJ/mol	76.0960 ± 0.0048	3355-34-8*1
Benzylium		929.34	909.84	± 0.61	kJ/mol	91.1299 ± 0.0056	6711-19-9*0
Aminooxy cation		946.05	938.92	± 0.80	kJ/mol	32.02147 ± 0.00034	51375-41-80
1,3-Cycloheptadiene		123.25	94.14	± 0.78	kJ/mol	94.1543 ± 0.0056	4054-38-0*1
Tropylium		897.9	878.1	± 1.1	kJ/mol	91.1299 ± 0.0056	26811-28-9*0
Dihydrogen fluoride		-55.9	-54.9	± 1.6	kJ/mol	21.01428 ± 0.00014	12592-22-2*1
Hydrofluorate ion		-75.6	-75.1	± 1.8	kJ/mol	20.006892 ± 0.000070	37249-79-9*0
Dioxofluorine		524.0	523.2	± 1.0	kJ/mol	50.99720 ± 0.00060	175861-93-5*0
Acetone enol		-147.1	-164.3	± 1.3	kJ/mol	58.0791 ± 0.0025	29456-04-0*2
1,3-Butadiyne-1,4-diyl		1052.47	1062.44	± 0.68	kJ/mol	48.0428 ± 0.0032	78015-07-3*0
Krypton hydride cation		1106.33	1104.55	± 0.69	kJ/mol	84.8074 ± 0.1000	37276-90-7*0
Hydrooxonitrate		78.60	75.68	± 0.99	kJ/mol	31.01463 ± 0.00032	66057-02-1*0
Cyanogen bromide anion		57.8	54.2	± 3.8	kJ/mol	105.9220 ± 0.0013	54092-05-6*0
Triazirinylium ion		1608.8	1605.9	± 1.6	kJ/mol	42.01967 ± 0.00021	92220-05-8*0
Cycloprop-2-enylium		1080.6	1075.5	± 1.4	kJ/mol	39.0554 ± 0.0024	26810-74-2*0
2-Propenylidyne anion		464.5	460.7	± 1.8	kJ/mol	39.0565 ± 0.0024	120126-89-8*0
Triazirine		464.0	457.6	± 2.6	kJ/mol	43.02816 ± 0.00022	157-29-9*0
2-Propen-3-yliumylidene		1494.7	1491.7	± 1.7	kJ/mol	39.0554 ± 0.0024	84654-86-4*0
2-Propenylidene anion		536.0	532.6	± 1.8	kJ/mol	39.0565 ± 0.0024	98705-30-7*0
Ethanium		888.7	870.3	± 1.8	kJ/mol	31.0764 ± 0.0017	24669-33-8*2
Ethanium		895.1	877.3	± 1.9	kJ/mol	31.0764 ± 0.0017	24669-33-8*3
Propynylidene		543.41	546.41	± 0.64	kJ/mol	38.0480 ± 0.0024	67152-18-5*0
1-Cyclopropene-1,2-diyl		791.1	790.6	± 1.5	kJ/mol	38.0480 ± 0.0024	202744-75-0*0
Cyclopropenyliumdiyl		1692.1	1695.0	± 1.9	kJ/mol	37.0395 ± 0.0024	127476-05-5*0
Cyclopropynyl anion		518.0	521.0	± 1.1	kJ/mol	37.0406 ± 0.0024	136861-42-2*0
Hypochlorous acid cation		998.91	995.87	± 0.90	kJ/mol	52.45949 ± 0.00095	71606-47-8*0
Hypochlorous acid anion		198.7	198.4	± 2.5	kJ/mol	52.46059 ± 0.00095	34524-94-2*0
Nitrate			-206.64	± 0.18	kJ/mol	62.00549 ± 0.00090	14797-55-8*800
Methanol anion		-89.1	-99.8	± 2.8	kJ/mol	32.04241 ± 0.00090	68474-04-4*0
Tribromine		155.9	134.2	± 3.2	kJ/mol	239.7120 ± 0.0030	11094-39-6*0
Chloryl chloride		126.1	122.1	± 1.7	kJ/mol	102.9042 ± 0.0019	117489-73-3*0
Cyclopentene			4.39	± 0.42	kJ/mol	68.1170 ± 0.0040	142-29-0*590
Hydrogen chloride			-165.979	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*829
Ethanol		-269.68	-277.44	± 0.23	kJ/mol	46.0684 ± 0.0017	64-17-5*500
1-Hydroxyethanide		-20.0	-33.4	± 2.9	kJ/mol	45.0610 ± 0.0017	88032-18-2*0
Ozone cation		1352.870	1350.531	± 0.041	kJ/mol	47.99765 ± 0.00090	12596-82-6*0
Peroxychloric acid		77.5	69.3	± 2.6	kJ/mol	100.4582 ± 0.0015	177778-91-5*0
Ethylene anion		231.6	225.5	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*2
Acetaldehyde anion		-61.9	-72.2	± 2.1	kJ/mol	44.0531 ± 0.0017	60427-04-5*0
Diazenium		968.59	957.33	± 0.77	kJ/mol	31.03675 ± 0.00025	37369-93-0*0
Hypofluorous acid cation		1142.00	1138.99	± 0.87	kJ/mol	36.00519 ± 0.00031	90243-22-4*0
1-Ethylium-1-yl		1182.1	1174.8	± 3.2	kJ/mol	28.0526 ± 0.0016	85944-79-2*0
Ethylidene anion		325.8	318.5	± 1.9	kJ/mol	28.0537 ± 0.0016	35829-99-3*0
Hydrogen fluoride			-321.05	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*888
Tribromide		-287.4	-308.4	± 1.9	kJ/mol	239.7125 ± 0.0030	14522-80-6*0
Ketene cation		882.22	879.05	± 0.12	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
Oxoethenylium		1139.7	1142.5	± 2.2	kJ/mol	41.0282 ± 0.0016	92056-63-8*0
Hydroxyimidogen anion		229.9	227.4	± 2.3	kJ/mol	31.01463 ± 0.00032	35337-59-80
Formaldehyde anion		-26.7	-28.3	± 2.0	kJ/mol	30.02653 ± 0.00087	27837-46-3*0
Chlorine difluoride cation		1346.3	1344.9	± 2.1	kJ/mol	73.44896 ± 0.00090	86825-59-4*0
Hydrogen difluoride cation		1174.3	1171.3	± 1.5	kJ/mol	39.004198 ± 0.000070	126950-54-72
Dinitrogen pentoxide			-41.04	± 0.42	kJ/mol	108.0105 ± 0.0015	10102-03-1*500
Formaldehyde		196.008	192.678	± 0.098	kJ/mol	30.02598 ± 0.00087	50-00-0*1
Oxiranylidene		456.2	452.1	± 2.2	kJ/mol	42.0367 ± 0.0016	50983-85-2*1
Oxiranylidene cation		1165.4	1161.9	± 2.5	kJ/mol	42.0361 ± 0.0016	50983-85-20
Oxiranylidene anion		236.4	232.4	± 2.3	kJ/mol	42.0372 ± 0.0016	50983-86-30
Methyl hydroperoxide cation		833.4	820.2	± 2.2	kJ/mol	48.0407 ± 0.0010	112465-88-0*0
2-Chloro ozone anion		-103.4	-105.6	± 3.2	kJ/mol	83.4514 ± 0.0013	141801-67-40
Methoxyoxoniumylidene		1012.8	1004.6	± 2.0	kJ/mol	47.0328 ± 0.0010	86475-50-5*0
Chlorine difluoride anion		-319.0	-319.1	± 2.2	kJ/mol	73.45005 ± 0.00090	91419-41-9*0
Ammonium radical		190.01	179.43	± 0.43	kJ/mol	18.03850 ± 0.00029	92075-50-8*0
Tetranitrogen cation		1392.8	1392.5	± 1.5	kJ/mol	56.02641 ± 0.00028	12185-04-5*0
Dioxirane anion		-170.4	-177.2	± 3.9	kJ/mol	46.0259 ± 0.0010	157-26-60
Dioxymethyl anion		54.9	49.8	± 1.4	kJ/mol	46.0259 ± 0.0010	93207-29-5*0
Isocyanomethane		183.79	177.31	± 0.82	kJ/mol	41.0520 ± 0.0016	593-75-9*0
H-CO2 vdW complex		-178.3	-177.5	± 2.1	kJ/mol	45.0174 ± 0.0010	2564-83-2100
Chloryl ion		1100.15	1097.49	± 0.52	kJ/mol	67.4510 ± 0.0011	25052-55-5*0
2-Propanol		-306.20	-319.01	± 0.38	kJ/mol	60.0950 ± 0.0025	67-63-0*500
1-Propanol		-290.53	-302.72	± 0.24	kJ/mol	60.0950 ± 0.0025	71-23-8*500
Carbon atom		711.401	716.886	± 0.048	kJ/mol	12.01070 ± 0.00080	7440-44-0*1
Hydrogen fluoride			-321.11	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*890
Carbon atom		833.332	838.478	± 0.048	kJ/mol	12.01070 ± 0.00080	7440-44-0*2
Dibromine			-2.16	± 0.20	kJ/mol	159.8080 ± 0.0020	7726-95-6*800
Oxazirinyl cation		1565.4	1566.1	± 2.3	kJ/mol	42.01629 ± 0.00086	228850-18-80
Oxazirinyl anion		448.0	448.8	± 2.4	kJ/mol	42.01739 ± 0.00086	28269-68-3*0
Acetylene anion		380.1	380.3	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*2
Hydrogen fluoride			-321.16	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*891
1-Methoxyethenol		-284.7	-304.0	± 1.7	kJ/mol	74.0785 ± 0.0025	4453-91-2*1
Hydroperoxyimidogen		103.3	99.8	± 2.4	kJ/mol	47.01348 ± 0.00061	877456-58-1*1
Oxobromonium		1139.1	1131.4	± 1.6	kJ/mol	95.9029 ± 0.0010	142315-39-7*0
Hydrogen fluoride			-321.16	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*905
Hydrogen chloride			-166.712	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*951
Nirous oxide anion		99.2	96.7	± 1.9	kJ/mol	44.01343 ± 0.00033	12274-12-3*0
Methylammoniumyl		865.42	851.48	± 0.33	kJ/mol	31.05659 ± 0.00088	34516-31-9*0
Oxalic acid		-710.8	-721.4	± 2.1	kJ/mol	90.0349 ± 0.0020	144-62-7*0
Methylamine anion		83.9	69.0	± 2.8	kJ/mol	31.05769 ± 0.00088	81096-79-9*0
Hydrogen chloride			-165.946	± 0.026	kJ/mol	36.46064 ± 0.00090	7647-01-0*907
Bromine dioxide		167.1	157.5	± 3.0	kJ/mol	111.9028 ± 0.0012	21255-83-4*0
Trioxidanylium		1070.6	1064.3	± 1.4	kJ/mol	49.00559 ± 0.00090	74241-49-9*0
Cyanogen cation		1598.37	1600.59	± 0.44	kJ/mol	52.0343 ± 0.0016	37354-81-7*0
Isocyanogen		411.0	413.3	± 1.6	kJ/mol	52.0349 ± 0.0016	83951-85-3*0
Diazoethenylidene		658.7	661.4	± 1.8	kJ/mol	52.0349 ± 0.0016	130760-10-0*0
Dioxygen		-0.000	-0.000	± 0.000	kJ/mol	31.99880 ± 0.00060	7782-44-7*1
Isocyanomethyliumylidene		1615.7	1621.2	± 2.0	kJ/mol	38.0276 ± 0.0016	78271-45-1*0
Isocyanomethylidyne anion		479.3	483.0	± 2.0	kJ/mol	38.0287 ± 0.0016	53590-27-50
Hypofluorous acid anion		155.3	154.7	± 2.6	kJ/mol	36.00629 ± 0.00031	36505-07-4*2
Cyanomethyliumylidene		1719.4	1724.9	± 2.2	kJ/mol	38.0276 ± 0.0016	76619-90-4*0
Cyanomethylidyne anion		410.2	413.9	± 2.2	kJ/mol	38.0287 ± 0.0016	12373-35-2*0
2,3-didehydro-1H-azirin-1-yl		720.5	724.5	± 2.1	kJ/mol	38.0281 ± 0.0016	439586-06-8*0
Cyanoaminylium		1363.2	1360.1	± 2.5	kJ/mol	41.03157 ± 0.00082	205443-18-1*0
Cyanoamidogen anion		70.8	67.8	± 1.4	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
Aminomethyl anion		209.2	199.0	± 2.1	kJ/mol	30.04975 ± 0.00085	74215-21-7*0
Chlorosyl chloride cation		1132.6	1130.8	± 2.0	kJ/mol	86.9043 ± 0.0018	86825-56-10
Methylaminilium		1134.8	1125.0	± 2.1	kJ/mol	30.04865 ± 0.00085	49784-84-1*0
Trichloromethylium		854.28	852.77	± 0.93	kJ/mol	118.3683 ± 0.0028	27130-34-3*0
Dichloromethyliumyl		1121.6	1122.6	± 1.8	kJ/mol	82.9156 ± 0.0020	55945-51-2*0
Methanimine cation		1056.0	1049.1	± 1.8	kJ/mol	29.04071 ± 0.00083	65130-65-6*0
Methanimine anion		224.3	217.1	± 2.2	kJ/mol	29.04181 ± 0.00083	127593-73-1*0
Aminomethyliumyl		1039.5	1031.8	± 2.3	kJ/mol	29.04071 ± 0.00083	89302-94-3*0
Aminomethylene anion		353.0	346.1	± 2.3	kJ/mol	29.04181 ± 0.00083	207914-86-1*0
Chloroniumyl ion		1137.797	1137.731	± 0.0051	kJ/mol	36.46009 ± 0.00090	12258-94-5*0
Hydrogen chloride			-166.637	± 0.025	kJ/mol	36.46064 ± 0.00090	7647-01-0*840
Nitrosyl nitrate		48.3	40.3	± 1.8	kJ/mol	92.0111 ± 0.0012	15969-55-8*1
Methylimidogen anion		321.1	313.5	± 1.8	kJ/mol	29.04181 ± 0.00083	82539-34-2*0
Hydrogen chloride			-165.546	± 0.027	kJ/mol	36.46064 ± 0.00090	7647-01-0*953
Fluorine atom cation		1758.303	1760.602	± 0.048	kJ/mol	18.99785462 ± 0.00000050	14701-13-4*0
Hydrogen bromide			-120.72	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*952
Hypobromous acid cation		974.80	964.18	± 0.64	kJ/mol	96.9108 ± 0.0010	154804-02-1*0
Chloromethane cation		1014.62	1007.85	± 0.20	kJ/mol	50.4867 ± 0.0012	12538-71-5*0
Trifluorine cation		1529.5	1527.4	± 2.3	kJ/mol	56.9946610 ± 0.0000015	64710-22-1*0
Imidogen anion		322.63	322.68	± 0.17	kJ/mol	15.015229 ± 0.000099	23841-33-0*0
Hydrogen fluoride			-321.05	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*903
Fluorosyl fluoride anion		-56.6	-55.7	± 2.4	kJ/mol	53.99675 ± 0.00030	86825-57-21
Methyleneaminylium		1456.6	1453.0	± 2.2	kJ/mol	28.03277 ± 0.00082	53518-13-1*1
Peroxyhypochlorite		-249.22	-248.20	± 0.37	kJ/mol	67.4520 ± 0.0011	224299-14-3*0
Bromofluoromethane		-198.0	-212.4	± 5.5	kJ/mol	112.9290 ± 0.0013	373-52-4*0
Bromine atom		117.914	111.851	± 0.056	kJ/mol	79.90400 ± 0.00100	10097-32-2*1
Water			-285.831	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*589
Fluorodibromomethane		-160.0	-179.5	± 5.5	kJ/mol	191.8250 ± 0.0022	1868-53-7*0
iso-Proplylide		128.6	110.2	± 1.6	kJ/mol	43.0882 ± 0.0024	25012-80-0*0
Difluorochlorobromomethane		-431.5	-442.2	± 5.5	kJ/mol	165.3642 ± 0.0016	353-59-3*0
Dichlorofluorobromomethane		-230.2	-240.0	± 5.5	kJ/mol	181.8185 ± 0.0022	353-58-2*0
Dibromofluorochloromethane		-170.8	-187.4	± 5.5	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
Hydroxyoxoammoniumyl		984.1	977.7	± 1.8	kJ/mol	47.01293 ± 0.00061	80371-48-8*0
1,2-Difluoroacetylene cation		1081.7	1084.5	± 1.3	kJ/mol	62.0177 ± 0.0016	268566-70-7*0
Aminomethyliumylidene		1168.3	1165.1	± 2.2	kJ/mol	28.03277 ± 0.00082	86784-42-1*0
Difluorophosgene cation		653.41	650.65	± 0.51	kJ/mol	66.00636 ± 0.00085	73256-56-1*0
Difluorophosgene anion		-603.5	-605.3	± 2.6	kJ/mol	66.00745 ± 0.00085	474815-26-4*0
1,2-Propadien-1-yl-3-ylidene anion		622.0	629.4	± 1.3	kJ/mol	36.0326 ± 0.0024	109292-47-9*0
Chloro(chlorooxy)methylene		73.5	73.7	± 3.6	kJ/mol	98.9155 ± 0.0020	479587-31-0*2
Chlorohydroxymethylene		13.9	10.9	± 2.6	kJ/mol	64.4707 ± 0.0012	147723-60-2*1
(Chlorooxy)methylene		119.1	117.8	± 2.7	kJ/mol	64.4707 ± 0.0012	331419-80-8*2
Dibromophosgene			-144.44	± 0.95	kJ/mol	187.8181 ± 0.0022	593-95-3*590
2-Chloroethanol			-314.96	± 0.53	kJ/mol	80.5132 ± 0.0019	107-07-3*590
2-Bromoethanol			-274.87	± 0.47	kJ/mol	124.9645 ± 0.0019	540-51-2*590
Dioxodiazoxane		109.3	105.2	± 1.8	kJ/mol	76.01168 ± 0.00091	122413-35-8*2
Deuterium hydride cation		1490.498	1490.587	± 0.000	kJ/mol	3.021493 ± 0.000070	12181-16-7*0
Phenylium		1148.46	1135.68	± 0.87	kJ/mol	77.1034 ± 0.0048	17333-73-2*2
Hydrogen bromide			-120.73	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*842
m-Benzyne anion		444.1	435.2	± 1.3	kJ/mol	76.0965 ± 0.0048	249589-31-9*0
p-Benzyne anion		465.0	455.5	± 1.3	kJ/mol	76.0965 ± 0.0048	219298-17-6*0
Chlorosyl chloride anion		-185.4	-184.7	± 2.3	kJ/mol	86.9053 ± 0.0018	86825-55-00
Cycloheptane		-126.94	-156.83	± 0.51	kJ/mol	98.1861 ± 0.0057	291-64-5*500
2-Cyclopropyn-1-ylidene		993.2	1000.1	± 2.5	kJ/mol	36.0321 ± 0.0024	102508-15-6*2
Cyclopropylide		264.7	251.9	± 1.8	kJ/mol	41.0723 ± 0.0024	1724-45-4*0
Ethylbenzene			-12.55	± 0.55	kJ/mol	106.1650 ± 0.0064	100-41-4*500
Triiodine cation		946.1	941.0	± 4.1	kJ/mol	380.712861 ± 0.000090	12596-32-6*0
Phenylacetylene			273.4	± 1.1	kJ/mol	102.1332 ± 0.0064	536-74-3*500
Aminooxy anion		47.5	40.5	± 1.7	kJ/mol	32.02257 ± 0.00034	51375-41-8*0
Phenyloxoniumylidene		901.6	887.2	± 2.2	kJ/mol	93.1028 ± 0.0048	41071-17-4*0
Anisole		-47.78	-72.62	± 0.80	kJ/mol	108.1378 ± 0.0056	100-66-3*0
Fluorosyl fluoride cation		1413.0	1413.4	± 3.5	kJ/mol	53.99566 ± 0.00030	86825-50-51
Hydrogen bromide			-120.68	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*841
Ammonium chloride		-311.556	-314.718	± 0.063	kJ/mol	53.49120 ± 0.00095	12125-02-9*510
Fluorobenzene		-151.80	-149.38	± 0.89	kJ/mol	96.1023 ± 0.0048	462-06-6*500
2-Cyclopropyn-1-yl anion		664.8	672.1	± 1.6	kJ/mol	36.0326 ± 0.0024	500574-36-7*0
Bromobenzene			59.9	± 1.3	kJ/mol	157.0079 ± 0.0049	108-86-1*500
Bicyclo[1.1.0]buta-1,3-diene-2,4-diyl		1047.47	1055.06	± 0.73	kJ/mol	48.0428 ± 0.0032	12184-80-4*0
Acetone		-245.11	-248.22	± 0.38	kJ/mol	58.0791 ± 0.0025	67-64-1*500
Nitric acid cation		1029.14	1020.07	± 0.69	kJ/mol	63.01233 ± 0.00091	272109-63-4*0
Propionaldehyde		-218.18	-216.72	± 0.29	kJ/mol	58.0791 ± 0.0025	123-38-6*500
Norbornadiene		263.2	237.8	± 1.9	kJ/mol	92.1384 ± 0.0056	121-46-0*0
Monoammonium succinate			-1067.97	± 0.72	kJ/mol	135.1186 ± 0.0035	38457-08-8*510
Diammonium succinate			-1182.51	± 0.48	kJ/mol	152.1492 ± 0.0035	2226-88-2*510
Ammonium bromide		-253.73	-270.31	± 0.16	kJ/mol	97.9425 ± 0.0010	12124-97-9*510
Acrolein		-46.6	-56.9	± 1.4	kJ/mol	56.0633 ± 0.0024	107-02-8*2
Tetrazete		764.9	759.0	± 1.8	kJ/mol	56.02696 ± 0.00028	42851-09-2*0
Nitric acid			-186.85	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*801
Tetraazatetrahedrane		763.7	757.2	± 1.7	kJ/mol	56.02696 ± 0.00028	12596-63-3*0
Paraformaldehyde			-179.2	± 1.6	kJ/mol	30.02598 ± 0.00087	30525-89-4*500
2-Oxo-1-ethylium-1-yl		1289.5	1286.1	± 2.7	kJ/mol	42.0361 ± 0.0016	214464-96-7*11
Oxoethylidene anion		87.0	83.7	± 2.3	kJ/mol	42.0372 ± 0.0016	106543-38-8*1
Nitric acid			-197.77	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*805
Dioxohydrazine		172.89	171.13	± 0.14	kJ/mol	60.01228 ± 0.00062	16824-89-8*2
Hydrogen chloride			-166.565	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*839
Formic acid		-431.54	-424.71	± 0.20	kJ/mol	46.0254 ± 0.0010	64-18-6*500
Chlorine hydride oxide		165.1	155.3	± 2.5	kJ/mol	84.4588 ± 0.0013	1027055-52-2*0
Trioxidanyl		25.32	23.23	± 0.13	kJ/mol	49.00614 ± 0.00090	12500-78-6*0
Hydrogen difluoride cation		1241.	1238.	± 17.	kJ/mol	39.004198 ± 0.000070	126950-54-7*1
Trioxidane		-82.04	-90.63	± 0.70	kJ/mol	50.01408 ± 0.00091	14699-99-1*0
(Z)-Diazene anion	$[H]/N=[N-]\[H]$	280.0	273.3	± 2.0	kJ/mol	30.02991 ± 0.00020	86631-37-00
Formyloxidanyl		-125.81	-127.18	± 0.56	kJ/mol	45.0174 ± 0.0010	16499-21-1*0
Dioxiranyl		217.3	213.8	± 2.0	kJ/mol	45.0174 ± 0.0010	120595-16-6*0
Isocyanogen iodide		341.8	342.1	± 4.9	kJ/mol	152.92191 ± 0.00080	66004-32-8*0
Nitric acid trihydrate		-1062.10	-1055.25	± 0.21	kJ/mol	117.0587 ± 0.0019	13444-83-2*500
Hydronium radical		-18.5	-21.6	± 2.1	kJ/mol	19.02322 ± 0.00037	12168-76-2*100
Ethoxyethane		-265.14	-277.46	± 0.81	kJ/mol	74.1216 ± 0.0033	60-29-7*500
Peroxyhypochlorous acid cation		1030.3	1024.5	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-21
Cycloprop-1-enylium		1502.3	1498.0	± 2.2	kJ/mol	39.0554 ± 0.0024	117067-78-4*0
Nitric acid monohydrate		-479.18	-472.68	± 0.19	kJ/mol	81.0282 ± 0.0012	13444-82-1*500
Isocyanogen iodide anion		123.0	125.2	± 9.3	kJ/mol	152.92246 ± 0.00080	66004-32-80
Carbon dioxide anion		-340.6	-340.1	± 2.2	kJ/mol	44.01005 ± 0.00100	14485-07-5*0
Cycloprop-1-enylide		373.5	369.1	± 2.2	kJ/mol	39.0565 ± 0.0024	80251-77-0*0
Cyclobutane			3.93	± 0.41	kJ/mol	56.1063 ± 0.0032	287-23-0*590
Isocyanic fluoride		301.3	303.1	± 1.8	kJ/mol	45.01584 ± 0.00080	16992-26-0*0
Acetic acid			-484.90	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*839
Dihydrogen fluoride		-56.5	-54.2	± 1.7	kJ/mol	21.01428 ± 0.00014	12592-22-2*2
Methylcyclopropane			1.83	± 0.59	kJ/mol	56.1063 ± 0.0032	594-11-6*590
1-Ethenylium-1-yl		1507.1	1507.1	± 2.1	kJ/mol	26.0367 ± 0.0016	80541-07-7*0
Methyl acetate			-445.66	± 0.61	kJ/mol	74.0785 ± 0.0025	79-20-9*500
Oxygen atom hexacation		42035.28	42037.14	± 0.12	kJ/mol	15.99611 ± 0.00030	14158-22-6*0
Hydrogen fluoride			-321.45	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*832
Methyl formate			-388.32	± 0.96	kJ/mol	60.0520 ± 0.0017	107-31-3*500
Oxygen difluoride anion		-202.0	-201.9	± 2.7	kJ/mol	53.99675 ± 0.00030	7783-41-70
Methanol		-235.31	-238.64	± 0.16	kJ/mol	32.04186 ± 0.00090	67-56-1*500
Isodiazene anion		380.9	374.1	± 2.1	kJ/mol	30.02991 ± 0.00020	63986-30-10
Dioxiranylidene cation		1409.1	1410.3	± 2.6	kJ/mol	44.00895 ± 0.00100	138832-57-20
Dioxiranylidene anion		-110.2	-109.7	± 3.0	kJ/mol	44.01005 ± 0.00100	138832-58-30
Ethylene glycol		-448.69	-455.21	± 0.38	kJ/mol	62.0678 ± 0.0018	107-21-1*500
Oxalic acid			-819.29	± 0.46	kJ/mol	90.0349 ± 0.0020	144-62-7*500
Dimethylamine			-43.70	± 0.39	kJ/mol	45.0837 ± 0.0017	124-40-3*500
Peroxyhypochlorous acid anion		-32.2	-34.0	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-32
Methylamine			-46.98	± 0.35	kJ/mol	31.05714 ± 0.00088	74-89-5*500
Trimethylamine			-49.8	± 1.0	kJ/mol	59.1103 ± 0.0025	75-50-3*500
Cyanogen anion		281.6	284.8	± 2.2	kJ/mol	52.0354 ± 0.0016	11118-88-0*0
Diisocyanogen cation		1825.1	1827.9	± 3.2	kJ/mol	52.0343 ± 0.0016	78800-21-21
Methanol dimer		-398.5	-419.2	± 1.4	kJ/mol	64.0837 ± 0.0018	42845-44-3*0
Isoprene			48.80	± 0.70	kJ/mol	68.1170 ± 0.0040	78-79-5*500
n-Hexane		-179.98	-198.64	± 0.34	kJ/mol	86.1754 ± 0.0049	110-54-3*500
Cyclohexane			-156.26	± 0.36	kJ/mol	84.1595 ± 0.0049	110-82-7*500
Hydraziniumyl		886.6	873.2	± 2.0	kJ/mol	32.04469 ± 0.00031	20771-51-1*0
Cyanoaminyliumyl		1671.6	1672.9	± 2.6	kJ/mol	40.02363 ± 0.00081	316122-03-9*0
Cyanoamidogen anion		210.92	210.93	± 0.77	kJ/mol	40.02473 ± 0.00081	189879-95-6*0
n-Heptane		-201.72	-224.17	± 0.48	kJ/mol	100.2019 ± 0.0057	142-82-5*500
Oxadiazirine cation		1509.9	1507.2	± 2.4	kJ/mol	44.01233 ± 0.00033	227934-45-40
Isocyanogen chloride		314.5	316.1	± 2.4	kJ/mol	61.4701 ± 0.0012	75754-69-7*0
n-Octane		-226.64	-249.76	± 0.67	kJ/mol	114.2285 ± 0.0065	111-65-9*500
Cyanamide			58.89	± 0.54	kJ/mol	42.04006 ± 0.00082	420-04-2*500
Diazomethyliumyl		1641.2	1642.4	± 4.1	kJ/mol	40.02363 ± 0.00081	307495-90-5*0
Diazomethylene anion		408.3	408.5	± 3.8	kJ/mol	40.02473 ± 0.00081	205498-92-6*0
3H-Diazirin-3-ylidene		578.8	579.2	± 2.7	kJ/mol	40.02418 ± 0.00081	253308-70-2*0
1,5-Hexadiene			54.43	± 0.32	kJ/mol	82.1436 ± 0.0049	592-42-7*500
Dioxymethylidyne cation		1436.6	1439.0	± 2.7	kJ/mol	44.00895 ± 0.00100	791121-04-52
Peroxychlorous acid		103.5	97.6	± 2.5	kJ/mol	84.4588 ± 0.0013	177778-92-6*2
Hydrazine		57.25	50.68	± 0.18	kJ/mol	32.04524 ± 0.00031	302-01-2*500
Chloromethyliumylidene		1282.6	1285.7	± 2.4	kJ/mol	47.4629 ± 0.0012	69773-94-0*0
Chloromethylidyne anion		319.7	323.4	± 2.5	kJ/mol	47.4639 ± 0.0012	117129-77-8*0
NON cation		1443.9	1444.1	± 2.8	kJ/mol	44.01233 ± 0.00033	227934-46-50
NON anion		495.3	492.8	± 2.5	kJ/mol	44.01343 ± 0.00033	227934-47-60
Hydrogen chloride			-166.105	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*830
Dioxygen difluoride		75.1	71.6	± 3.6	kJ/mol	69.99561 ± 0.00060	183051-89-0*0
Difluorodioxidanium		1283.6	1279.1	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-01
Hydrogen chloride			-166.741	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*842
Trifluorine		80.6	81.9	± 2.6	kJ/mol	56.9952096 ± 0.0000015	73455-86-4*0
1,1,1-Trichloroethane			-177.55	± 0.49	kJ/mol	133.4033 ± 0.0031	71-55-6*500
Dioxymethylidyne cation		1388.2	1391.7	± 3.2	kJ/mol	44.00895 ± 0.00100	791121-04-5101
Cyclopropenylidene anion		544.2	543.8	± 2.2	kJ/mol	38.0485 ± 0.0024	16165-40-50
Tetraoxodinitrogen cation		1030.6	1025.1	± 2.6	kJ/mol	92.0105 ± 0.0012	64476-91-1*0
Dihydrogen cation		1489.060	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*1
Carbon dioxide cation		1335.0	1335.5	± 2.4	kJ/mol	44.00895 ± 0.00100	12181-61-2*1
Carbon monoxide anion		30.0	33.7	± 2.3	kJ/mol	28.01065 ± 0.00085	12539-63-8*0
Peroxynitrous acid		-5.81	-11.64	± 0.36	kJ/mol	63.01288 ± 0.00091	14691-52-2*0
Vinyl chloride		-2.7	1.9	± 1.9	kJ/mol	62.4979 ± 0.0018	75-01-4*500
Poly(vinylchloride)		-84.6	-94.0	± 1.3	kJ/mol	62.4979 ± 0.0018	9002-86-2*500
Bromosyl bromide		178.6	162.8	± 2.1	kJ/mol	175.8074 ± 0.0020	68322-97-4*0
1,1-Dichloroethene			-23.81	± 0.50	kJ/mol	96.9427 ± 0.0024	75-35-4*500
Carbon monoxide		465.579	469.286	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*1
Ammonia anion		94.3	87.3	± 2.4	kJ/mol	17.03111 ± 0.00022	37353-00-7*0
Trioxirane		272.9	270.3	± 1.3	kJ/mol	47.99820 ± 0.00090	153851-84-4*0
Propane cation		974.7	954.7	± 1.7	kJ/mol	44.0951 ± 0.0025	34479-70-4*0
Hydrogen fluoride			-321.02	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*887
Hydroxyoxoammoniumyl		984.1	977.7	± 1.8	kJ/mol	47.01293 ± 0.00061	80371-48-8*1
Dichloromethane			-123.06	± 0.50	kJ/mol	84.9320 ± 0.0020	75-09-2*590
Chlorine chlorite		177.4	175.0	± 2.2	kJ/mol	102.9042 ± 0.0019	105206-44-8*2
Chlorodioxidenium		1202.7	1200.4	± 3.4	kJ/mol	67.4510 ± 0.0011	64710-10-7*0
Hydrochlorate ion		-25.2	-24.2	± 2.5	kJ/mol	36.46119 ± 0.00090	63099-75-2*0
Hydrazoic acid cation		1333.61	1327.94	± 0.83	kJ/mol	43.02761 ± 0.00022	58852-14-5*0
Hydrogen difluoride cation		1267.6	1265.4	± 4.1	kJ/mol	39.004198 ± 0.000070	126950-54-71
Difluoromethylene anion		-211.20	-210.02	± 0.60	kJ/mol	50.00805 ± 0.00080	66212-40-6*0
Fluoromethylidyne anion		200.8	204.3	± 1.9	kJ/mol	31.00965 ± 0.00080	33412-12-3*0
Perchloryl cation		1252.1	1246.3	± 2.5	kJ/mol	83.4504 ± 0.0013	23594-88-9*0
1-Methyl-1-ethylium-1-yl		1058.7	1046.2	± 2.6	kJ/mol	42.0792 ± 0.0024	121408-19-3*0
Isopropylidene anion		282.9	268.8	± 2.7	kJ/mol	42.0803 ± 0.0024	121408-19-30
Hydrazoic acid anion		309.0	302.7	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*1
1,2-Propadien-1-ylium-1-yl-3-ylidene		1981.5	1989.4	± 2.2	kJ/mol	36.0316 ± 0.0024	118090-85-0*1
1,3-Propanediyl		320.1	308.2	± 1.7	kJ/mol	42.0797 ± 0.0024	32458-33-6*1
Difluorovinylidene		129.4	130.6	± 2.2	kJ/mol	62.0182 ± 0.0016	41895-33-4*0
Bromoacetylene		281.6	275.1	± 1.6	kJ/mol	104.9333 ± 0.0019	593-61-3*0
1-Propynylium		1547.0	1545.0	± 3.1	kJ/mol	39.0554 ± 0.0024	24858-94-4*0
Cycloprop-2-enylide		514.8	511.8	± 2.2	kJ/mol	39.0565 ± 0.0024	20829-57-6*0
Chloro(chlorooxy)methylene		98.	101.	± 15.	kJ/mol	98.9155 ± 0.0020	479587-31-0*11
Nitrosyl nitrite anion		-103.1	-106.2	± 2.8	kJ/mol	76.01223 ± 0.00091	122413-35-81
Chlorooxomethylium		783.7	783.9	± 2.2	kJ/mol	63.4623 ± 0.0012	38264-03-8*0
Trihydrogen		756.931	754.146	± 0.015	kJ/mol	3.02382 ± 0.00021	12184-91-7*2
2-Iodoethanol			-207.2	± 2.4	kJ/mol	171.9650 ± 0.0017	624-76-0*590
1,3-Butadiyne cation		1440.18	1442.05	± 0.86	kJ/mol	50.0581 ± 0.0032	55468-55-8*0
Carbon suboxide cation		928.3	931.8	± 1.3	kJ/mol	68.0304 ± 0.0025	151528-67-5*0
Carbon suboxide anion		-131.4	-128.0	± 2.5	kJ/mol	68.0314 ± 0.0025	109362-94-9*0
Nitrous acid anion		-105.85	-110.48	± 0.78	kJ/mol	47.01403 ± 0.00061	256393-36-9*2
Benzene anion		209.1	197.2	± 1.2	kJ/mol	78.1124 ± 0.0048	34562-85-1*0
Tetraoxidanyl		53.0	46.0	± 5.1	kJ/mol	65.0055 ± 0.0012	69696-93-1*2
o-Benzyne		625.6	616.3	± 1.1	kJ/mol	76.0960 ± 0.0048	462-80-6*1
Hydroxylamine			-97.1	± 2.2	kJ/mol	33.02996 ± 0.00037	7803-49-8*1000
1-Propenylium		1231.9	1221.6	± 1.7	kJ/mol	41.0713 ± 0.0024	50457-58-4*2
1-Propenylide		204.1	192.8	± 1.8	kJ/mol	41.0723 ± 0.0024	65887-20-9*2
m-Benzyne		526.9	518.5	± 1.2	kJ/mol	76.0960 ± 0.0048	1828-89-3*0
p-Benzyne cation		1425.7	1418.5	± 2.1	kJ/mol	76.0954 ± 0.0048	121058-09-1*0
p-Benzyne		587.0	577.6	± 1.2	kJ/mol	76.0960 ± 0.0048	3355-34-8*0
Toluene		19.73	11.97	± 0.34	kJ/mol	92.1384 ± 0.0056	108-88-3*500
Cyclopentadienylium		1087.53	1074.66	± 0.93	kJ/mol	65.0927 ± 0.0040	29661-18-5*0
Isocyanogen bromide		341.1	335.4	± 3.4	kJ/mol	105.9214 ± 0.0013	65997-98-0*0
Dioxodiazoxane		125.7	120.4	± 2.1	kJ/mol	76.01168 ± 0.00091	122413-35-8*3
Cycloheptene		-25.6	-46.6	± 1.7	kJ/mol	96.1702 ± 0.0057	628-92-2*500
Cyclopropylium		1104.5	1093.0	± 2.5	kJ/mol	41.0713 ± 0.0024	1724-43-2*0
Cycloheptatriene		153.57	144.79	± 0.97	kJ/mol	92.1384 ± 0.0056	544-25-2*500
Triiodine		153.4	149.4	± 3.6	kJ/mol	380.713410 ± 0.000090	12596-31-5*0
2-Propen-3-ylium-1-ylidyne		1791.1	1792.7	± 2.6	kJ/mol	38.0474 ± 0.0024	161054-36-0*0
Phenylethene			104.30	± 0.48	kJ/mol	104.1491 ± 0.0064	100-42-5*500
Phenol		-146.43	-162.28	± 0.66	kJ/mol	94.1112 ± 0.0048	108-95-2*500
Propenediylidene anion		588.8	590.0	± 2.3	kJ/mol	38.0485 ± 0.0024	161054-36-00
Anisole			-119.55	± 0.77	kJ/mol	108.1378 ± 0.0056	100-66-3*500
Benzaldehyde		-85.8	-86.9	± 1.1	kJ/mol	106.1219 ± 0.0056	100-52-7*500
Hydrogen bromide			-120.58	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*839
Fluorobenzene anion		-18.3	-30.2	± 1.8	kJ/mol	96.1029 ± 0.0048	34561-55-2*0
Azide			272.56	± 0.48	kJ/mol	42.02077 ± 0.00021	14343-69-2*800
Iodobenzene cation		1022.7	1007.2	± 1.0	kJ/mol	204.0078 ± 0.0048	38406-85-8*0
Nitrobenzene			6.3	± 1.4	kJ/mol	123.1094 ± 0.0049	98-95-3*500
Dihydrogen		1.417	0.019	± 0.000	kJ/mol	2.01588 ± 0.00014	1333-74-0*1
Nitromethane		-114.18	-113.00	± 0.43	kJ/mol	61.0401 ± 0.0010	75-52-5*500
Acetonitrile			40.61	± 0.24	kJ/mol	41.0520 ± 0.0016	75-05-8*500
Oxygen difluoride cation		1292.11	1289.58	± 0.66	kJ/mol	53.99566 ± 0.00030	39432-25-2*0
2,2,4-Trimethylpentane		-224.5	-258.9	± 1.5	kJ/mol	114.2285 ± 0.0065	540-84-1*500
Trifluoroethene		-482.7	-487.7	± 8.4	kJ/mol	82.0245 ± 0.0016	359-11-5*0
Norbornadiene			204.4	± 2.0	kJ/mol	92.1384 ± 0.0056	121-46-0*500
2,3-Butanedione			-365.57	± 0.54	kJ/mol	86.0892 ± 0.0033	431-03-8*500
2,3-Butanedione		-310.42	-326.98	± 0.70	kJ/mol	86.0892 ± 0.0033	431-03-8*0
Succinic acid		-918.55	-940.28	± 0.13	kJ/mol	118.0880 ± 0.0034	110-15-6*500
Deuterium hydride		0.328	0.319	± 0.000	kJ/mol	3.022042 ± 0.000070	13983-20-5*0
1,2-Diiodoethane		87.79	73.13	± 0.90	kJ/mol	281.8621 ± 0.0016	624-73-7*0
1,2-Diiodoethane			9.26	± 0.60	kJ/mol	281.8621 ± 0.0016	624-73-7*500
1,1-Dibromoethane		-9.3	-36.3	± 7.8	kJ/mol	187.8612 ± 0.0026	557-91-5*0
Helium hydride cation		1350.148	1348.258	± 0.000	kJ/mol	5.009993 ± 0.000070	17009-49-3*0
Bromoniumyl		1097.69	1089.84	± 0.15	kJ/mol	80.9114 ± 0.0010	12258-64-9*0
Xenon hydride cation		1038.16	1036.38	± 0.89	kJ/mol	132.2974 ± 0.0200	37276-91-8*0
2-Butanone		-267.85	-273.34	± 0.91	kJ/mol	72.1057 ± 0.0033	78-93-3*500
Hydrogen peroxide		-193.170	-187.353	± 0.080	kJ/mol	34.01468 ± 0.00062	7722-84-1*500
2,4,5-Trioxa-1,3-diazabicyclo[1.1.1]pentane		602.5	593.3	± 2.1	kJ/mol	76.01168 ± 0.00091	224950-18-9*0
Acrolein			-95.8	± 1.4	kJ/mol	56.0633 ± 0.0024	107-02-8*500
Iodine monochloride		-36.511	-35.537	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*510
Ethenedione cation		909.5	912.7	± 2.7	kJ/mol	56.0197 ± 0.0017	12541-99-0*0
2-Chloro ozone		265.9	265.3	± 3.7	kJ/mol	83.4509 ± 0.0013	141801-66-30
Deuterium molecule cation		1492.286	1492.361	± 0.000	kJ/mol	4.02765497609 ± 0.00000000080	12184-84-8*0
2-Oxo-1-ethylium-1-yl		1292.1	1288.8	± 2.6	kJ/mol	42.0361 ± 0.0016	214464-96-7*12
Oxoethylidene anion		92.4	89.1	± 2.5	kJ/mol	42.0372 ± 0.0016	106543-38-8*2
Formaldehyde			-171.19	± 0.59	kJ/mol	30.02598 ± 0.00087	50-00-0*800
Oxoniumyl ion		978.467	975.564	± 0.028	kJ/mol	18.01473 ± 0.00033	56583-62-1*1
Dioxofluorine cation		1667.0	1664.8	± 2.8	kJ/mol	50.99665 ± 0.00060	223566-05-0*0
1-Hydroxyethyl		-42.26	-55.69	± 0.65	kJ/mol	45.0605 ± 0.0017	2348-46-1*0
Iodine monochloride			-24.048	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*590
Oxygen atom trication		10249.929	10252.880	± 0.018	kJ/mol	15.99775 ± 0.00030	14127-64-1*0
Bromodioxy		118.1	109.1	± 4.3	kJ/mol	111.9028 ± 0.0012	67177-47-3*0
Hydrazine monohydrate			-242.66	± 0.19	kJ/mol	50.06052 ± 0.00053	7803-57-8*500
Hydrogen fluoride			-321.13	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*906
Hydroxymethylene		112.66	108.90	± 0.28	kJ/mol	30.02598 ± 0.00087	19710-56-6*0
Peroxyformate		-320.7	-326.6	± 1.8	kJ/mol	61.0174 ± 0.0012	104960-05-6*2
Fluorosyl fluoride		227.	225.	± 21.	kJ/mol	53.99621 ± 0.00030	86825-57-2*2
Methylaminyliumyl		1388.3	1382.0	± 2.6	kJ/mol	29.04071 ± 0.00083	56924-51-7*1
Peroxyformyl		-90.5	-95.9	± 1.8	kJ/mol	61.0168 ± 0.0012	56240-83-6*2
Acetylene anion		356.8	356.7	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*0
Carbon monoxide		-113.803	-110.523	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*2
Formylimidogen		245.4	242.2	± 3.3	kJ/mol	43.02478 ± 0.00086	42288-92-6*2
2-Hydroxyethylium		1024.7	1012.1	± 2.0	kJ/mol	45.0600 ± 0.0017	38607-31-7*1
Fluorine atom		77.255	79.040	± 0.048	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*1
Nitrosyl nitrate		60.4	52.5	± 1.9	kJ/mol	92.0111 ± 0.0012	15969-55-8*2
Tetrabromomethane			48.8	± 1.4	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
Bromomethane		-56.66	-59.68	± 0.19	kJ/mol	94.9385 ± 0.0013	74-83-9*590
Trihydrogen		745.878	743.094	± 0.062	kJ/mol	3.02382 ± 0.00021	12184-91-7*1
Hydrogen peroxide cation		931.41	924.56	± 0.94	kJ/mol	34.01413 ± 0.00062	12325-10-9*22
Trioxodinitrate anion		-87.3	-93.1	± 2.2	kJ/mol	76.01223 ± 0.00091	194856-62-7*1
Trihydrogen cation		1110.304	1106.697	± 0.013	kJ/mol	3.02327 ± 0.00021	28132-48-1*2
Hydroxyoxoammoniumyl		1014.8	1008.4	± 2.0	kJ/mol	47.01293 ± 0.00061	80371-48-8*2
Ethynylene		820.28	826.86	± 0.26	kJ/mol	24.0214 ± 0.0016	12070-15-4*2
Acetaldehyde		-187.12	-191.83	± 0.32	kJ/mol	44.0526 ± 0.0017	75-07-0*500
Dihydrogen cation		1488.364	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*2
Deuteride		146.991	148.904	± 0.0021	kJ/mol	2.01465035791 ± 0.00000000040	14452-69-8*0
Ethynylene		827.51	834.21	± 0.26	kJ/mol	24.0214 ± 0.0016	12070-15-4*1
Isocyanogen bromide anion		105.0	101.8	± 4.6	kJ/mol	105.9220 ± 0.0013	238754-53-50
Tetraoxodinitrate anion		-184.6	-187.8	± 2.4	kJ/mol	92.0116 ± 0.0012	63552-02-3*0
Dihydrogen		-0.000	-0.058	± 0.000	kJ/mol	2.01588 ± 0.00014	1333-74-0*2
Water trimer		-762.73	-776.83	± 0.21	kJ/mol	54.04584 ± 0.00099	31014-12-7*0
Acetic acid			-484.88	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*833
Propylene cation		975.23	961.70	± 0.21	kJ/mol	42.0792 ± 0.0024	34504-10-4*0
Dioxaziridine		277.3	270.6	± 2.0	kJ/mol	47.01348 ± 0.00061	67394-35-8*0
Difluorine cation		1514.301	1514.475	± 0.013	kJ/mol	37.9962578 ± 0.0000010	12184-86-0*0
Cyclopropane cation		1022.3	1006.9	± 1.6	kJ/mol	42.0792 ± 0.0024	34496-93-0*0
Acetic acid			-484.93	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*850
Hydrogen peroxide cation		897.75	890.77	± 0.37	kJ/mol	34.01413 ± 0.00062	12325-10-9*11
1,2-Propadien-1-ylium-1-yl-3-ylidene		1944.7	1952.6	± 1.9	kJ/mol	36.0316 ± 0.0024	118090-85-0*0
Ethyl bromide		-55.82	-91.35	± 0.27	kJ/mol	108.9651 ± 0.0019	74-96-4*500
Nitrous acid anion		-105.5	-109.4	± 1.8	kJ/mol	47.01403 ± 0.00061	256393-36-9*1
Methyl acetate		-394.20	-413.07	± 0.61	kJ/mol	74.0785 ± 0.0025	79-20-9*0
Tetroxidane		-34.2	-44.6	± 2.4	kJ/mol	66.0135 ± 0.0012	29683-94-1*0
Vinyl iodide		139.5	130.7	± 1.2	kJ/mol	153.9497 ± 0.0016	593-66-8*0
Iodine atom		198.109	197.709	± 0.0021	kJ/mol	126.904470 ± 0.000030	14362-44-8*2
Peroxyhypochlorous acid cation		1050.8	1045.1	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-22
Difluorovinylidene cation		1181.5	1183.0	± 2.3	kJ/mol	62.0177 ± 0.0016	268566-71-8*0
Dioxofluorine anion		155.9	154.3	± 2.5	kJ/mol	50.99775 ± 0.00060	175861-93-50
mu-Oxodichlorate anion		-147.8	-147.7	± 2.5	kJ/mol	86.9053 ± 0.0018	365546-30-1*0
Hydrazoic acid anion		316.1	310.0	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*2
Hydroxylamine		-33.23	-43.60	± 0.46	kJ/mol	33.02996 ± 0.00037	7803-49-8*0
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
Difluorodioxidanium		1287.1	1283.0	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-02
Oxygen atom pentacation		28708.788	28710.646	± 0.053	kJ/mol	15.99666 ± 0.00030	14127-66-3*0
Nitrosyl nitrite anion		-100.3	-103.5	± 2.9	kJ/mol	76.01223 ± 0.00091	122413-35-82
Dihydrogen anion		253.8	254.7	± 1.2	kJ/mol	2.01643 ± 0.00014	12184-89-3*0
Methyl formate		-346.70	-359.74	± 0.94	kJ/mol	60.0520 ± 0.0017	107-31-3*0
2-Propen-1-ylium-1-ylidene		1373.2	1369.6	± 2.0	kJ/mol	39.0554 ± 0.0024	88000-25-3*0
Carbon suboxide		-131.7	-116.6	± 1.3	kJ/mol	68.0309 ± 0.0025	504-64-3*500
1-Methylethenylium		995.2	986.1	± 2.0	kJ/mol	41.0713 ± 0.0024	50457-57-3*0
Trioxygen difluoride		112.2	107.1	± 1.1	kJ/mol	85.99501 ± 0.00090	16829-28-0*0
1-Methylethenyl anion		199.4	188.3	± 2.0	kJ/mol	41.0723 ± 0.0024	65887-19-6*0
Hypochloroperoxoous acid, hydroxy ester		49.5	42.5	± 2.5	kJ/mol	84.4588 ± 0.0013	928652-99-7*2
Hydroxylamine			-107.61	± 0.63	kJ/mol	33.02996 ± 0.00037	7803-49-8*500
Acetoxy		-182.5	-191.3	± 1.2	kJ/mol	59.0440 ± 0.0017	13799-69-4*1
Water		-238.931	-241.835	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*2
m-Benzyne		614.6	605.2	± 1.4	kJ/mol	76.0960 ± 0.0048	1828-89-3*1
Dinitrogen dimer		-0.88	0.84	± 0.67	kJ/mol	56.02696 ± 0.00028	154680-01-0*0
Ammonium hydroxide			-366.715	± 0.062	kJ/mol	35.04584 ± 0.00047	1336-21-6*1000
1-Propenylium		1233.8	1223.4	± 2.0	kJ/mol	41.0713 ± 0.0024	50457-58-4*1
Acetoxy		-182.5	-191.2	± 1.2	kJ/mol	59.0440 ± 0.0017	13799-69-4*0
Water		-286.301	-292.742	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*510
Chlorine atom		119.621	121.228	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*1
1-Propenylide		210.5	199.4	± 2.1	kJ/mol	41.0723 ± 0.0024	65887-20-9*1
Hydrogen iodide			-56.827	± 0.089	kJ/mol	127.912410 ± 0.000076	10034-85-2*800
sec-Butylium		792.8	769.2	± 1.7	kJ/mol	57.1137 ± 0.0033	16548-59-7*0
mu-Oxodichlorine cation		1130.44	1126.83	± 0.63	kJ/mol	86.9043 ± 0.0018	51174-96-0*0
Tropylide		260.9	244.6	± 2.0	kJ/mol	91.1310 ± 0.0056	34464-18-1*0
Hydrazoic acid			257.57	± 0.48	kJ/mol	43.02816 ± 0.00022	7782-79-8*1000
Hydrogen peroxide		-129.478	-135.464	± 0.063	kJ/mol	34.01468 ± 0.00062	7722-84-1*2
Methylene		391.063	391.621	± 0.099	kJ/mol	14.02658 ± 0.00081	2465-56-7*0
Oxygen atom tetracation		17719.207	17721.064	± 0.025	kJ/mol	15.99721 ± 0.00030	14127-65-2*0
Hydrazoic acid			272.56	± 0.48	kJ/mol	43.02816 ± 0.00022	7782-79-8*800
1-Propen-1-yl-3-ylidene		657.4	654.0	± 1.5	kJ/mol	39.0559 ± 0.0024	84654-90-0*1
Oxygen atom heptacation		113369.48	113371.34	± 0.12	kJ/mol	15.99556 ± 0.00030	14274-89-6*0
Tribromide			-129.55	± 0.25	kJ/mol	239.7125 ± 0.0030	14522-80-6*800
Bicyclo[1.1.0]buta-1,3-dien-4-ylium-2-yl		2087.4	2097.2	± 2.7	kJ/mol	48.0423 ± 0.0032	289679-91-0*0
Trihydrogen		215.9	218.3	± 1.1	kJ/mol	3.02382 ± 0.00021	12184-91-7*100
Oxonium		605.83	599.08	± 0.17	kJ/mol	19.02267 ± 0.00037	13968-08-6*2
Bicyclo[1.1.0]buta-1,3-dien-2-yl anion		803.6	811.3	± 2.1	kJ/mol	48.0433 ± 0.0032	289679-89-6*0
cis-1,2-Diiodoethene		215.70	207.42	± 0.44	kJ/mol	279.8462 ± 0.0016	590-26-1*0
trans-1,2-Diiodoethene		214.81	207.42	± 0.44	kJ/mol	279.8462 ± 0.0016	590-27-2*0
Polyoxymethylene			-170.88	± 0.21	kJ/mol	30.02598 ± 0.00087	9002-81-7*500
Peroxyhypochlorous acid anion		-2.9	-3.3	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-31
Trioxirane cation		1444.6	1442.4	± 2.2	kJ/mol	47.99765 ± 0.00090	153851-84-40
1,2-Dibromoethane			-80.3	± 1.3	kJ/mol	187.8612 ± 0.0026	106-93-4*500
Diatomic bromine cation		1060.32	1045.36	± 0.23	kJ/mol	159.8075 ± 0.0020	12595-71-0*0
Tribromine cation		1035.9	1013.2	± 2.6	kJ/mol	239.7115 ± 0.0030	33105-86-1*0
Chlorine trifluoride cation		1053.4	1049.1	± 2.5	kJ/mol	92.44736 ± 0.00090	478167-77-0*0
Cyclopentadiene			109.80	± 0.58	kJ/mol	66.1011 ± 0.0040	542-92-7*590
Isocyanogen cation		1653.1	1655.4	± 1.6	kJ/mol	52.0343 ± 0.0016	133415-63-1*0
1,3-Butadiyn-4-ylium-1-yl		2109.9	2120.5	± 2.9	kJ/mol	48.0423 ± 0.0032	124708-46-9*0
1,3-Butadien-2-ol		-43.1	-59.6	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*21
1,3-Butadien-2-ol		-53.8	-69.1	± 1.6	kJ/mol	70.0898 ± 0.0032	59120-04-6*1
Acrolein		-55.3	-65.4	± 1.2	kJ/mol	56.0633 ± 0.0024	107-02-8*0
Oxygen atom dication		4949.459	4953.000	± 0.013	kJ/mol	15.99830 ± 0.00030	14127-63-0*0
1,2-Propadien-1-one cation		1012.6	1011.2	± 1.9	kJ/mol	54.0468 ± 0.0024	87612-93-9*0
Nitrogen atom		470.579	472.442	± 0.024	kJ/mol	14.006740 ± 0.000070	17778-88-0*1
2-Propynal cation		1168.3	1167.2	± 1.6	kJ/mol	54.0468 ± 0.0024	100815-70-1*0
1,3-Butadiynyl anion		677.7	686.8	± 1.2	kJ/mol	48.0433 ± 0.0032	59158-53-1*0
Ethenedione anion		-148.1	-145.6	± 2.9	kJ/mol	56.0207 ± 0.0017	77783-15-4*0
Diisocyanogen cation		1838.4	1842.3	± 3.1	kJ/mol	52.0343 ± 0.0016	78800-21-22
Fluorosyl fluoride cation		1413.0	1413.4	± 3.5	kJ/mol	53.99566 ± 0.00030	86825-50-50
Ethoxyethene		-117.3	-135.8	± 1.5	kJ/mol	72.1057 ± 0.0033	109-92-2*0
Peroxyformic acid		-279.34	-288.47	± 0.90	kJ/mol	62.0248 ± 0.0012	107-32-4*0
Hydrogen peroxide		-129.458	-135.464	± 0.063	kJ/mol	34.01468 ± 0.00062	7722-84-1*1
Trioxidaniumyl		925.4	916.5	± 1.5	kJ/mol	50.01353 ± 0.00091	161321-37-5*0
Chlorine pentafluoride anion		-619.3	-622.7	± 4.4	kJ/mol	130.44526 ± 0.00090	184851-42-1*0
Ethenol		-112.71	-123.14	± 0.66	kJ/mol	44.0526 ± 0.0017	557-75-5*0
Vinyl alcohol cation		778.9	767.9	± 1.4	kJ/mol	44.0520 ± 0.0017	57239-63-1*0
Dichloromethylene		229.49	230.67	± 0.64	kJ/mol	82.9161 ± 0.0020	1605-72-7*0
Trioxygen difluoride		113.4	107.6	± 2.1	kJ/mol	85.99501 ± 0.00090	16829-28-0*2
Isocyanic fluoride cation		1618.4	1619.0	± 4.0	kJ/mol	45.01529 ± 0.00080	16992-26-00
Diiodine cation		963.523	960.408	± 0.018	kJ/mol	253.808391 ± 0.000060	28712-14-3*0
Diazene anion		265.5	258.7	± 2.0	kJ/mol	30.02991 ± 0.00020	100429-75-2*0
Peroxychlorous acid		102.3	96.2	± 3.7	kJ/mol	84.4588 ± 0.0013	177778-92-6*3
Ethoxyethene		-110.8	-134.7	± 2.3	kJ/mol	72.1057 ± 0.0033	109-92-2*21
Ethoxyethene		-110.3	-132.5	± 2.7	kJ/mol	72.1057 ± 0.0033	109-92-2*1
Ethoxyethene		-108.2	-131.4	± 2.3	kJ/mol	72.1057 ± 0.0033	109-92-2*11
O--HH Complex		247.2	248.2	± 2.0	kJ/mol	18.01528 ± 0.00033	7732-18-5102
Fluorosyl fluoride anion		-147.2	-146.9	± 3.0	kJ/mol	53.99675 ± 0.00030	86825-57-20
Tetraoxidanyl		2.0	0.2	± 3.0	kJ/mol	65.0055 ± 0.0012	69696-93-1*0
Diisocyanogen anion		456.6	462.3	± 3.6	kJ/mol	52.0354 ± 0.0016	78800-22-30
Cyclopropane		41.42	35.74	± 0.54	kJ/mol	42.0797 ± 0.0024	75-19-4*500
Iminomethyl		275.82	272.22	± 0.71	kJ/mol	28.03332 ± 0.00082	15691-95-9*0
Chlorine atom		130.176	131.783	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*2
Diazene		207.09	199.96	± 0.44	kJ/mol	30.02936 ± 0.00020	3618-05-1*0
Hydroperoxonium		738.1	727.8	± 1.2	kJ/mol	35.02207 ± 0.00064	70850-26-9*0
Imidogen		358.75	358.79	± 0.17	kJ/mol	15.014680 ± 0.000099	13774-92-0*1
Perchloric acid cation		1191.8	1182.2	± 3.5	kJ/mol	100.4577 ± 0.0015	91712-47-9*0
Iminomethyl anion		237.4	233.6	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*0
Hydrodioxonitrate		-62.3	-68.8	± 3.3	kJ/mol	47.01403 ± 0.00061	61508-71-2*0
Diisocyanogen cation		1825.1	1828.3	± 3.2	kJ/mol	52.0343 ± 0.0016	78800-21-20
Oxoethylidene anion		87.0	84.3	± 2.3	kJ/mol	42.0372 ± 0.0016	106543-38-8*0
Ethynol anion		163.6	165.0	± 3.4	kJ/mol	42.0372 ± 0.0016	864971-50-6*0
Ethynol		409.5	406.4	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*13
Isocyanogen chloride cation		1480.8	1482.0	± 3.9	kJ/mol	61.4696 ± 0.0012	956475-91-5*0
Ethynol		464.3	461.0	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*15
Chloromethylene		320.26	320.54	± 0.89	kJ/mol	48.4713 ± 0.0012	2108-20-5*0
1-Methylethylidene		316.5	303.6	± 2.1	kJ/mol	42.0797 ± 0.0024	40852-89-9*0
Chlorous acid cation		996.6	991.5	± 3.1	kJ/mol	68.4589 ± 0.0011	99559-66-70
Propylidene anion		300.8	286.7	± 3.3	kJ/mol	42.0803 ± 0.0024	121408-55-70
Diazanide		249.4	239.3	± 3.1	kJ/mol	31.03785 ± 0.00025	25415-88-7*0
Dioxohydrazine		192.2	188.7	± 1.8	kJ/mol	60.01228 ± 0.00062	16824-89-8*1
Oxoniumyl ion		978.717	975.566	± 0.028	kJ/mol	18.01473 ± 0.00033	56583-62-1*2
Difluorovinylidene anion		-88.2	-87.1	± 2.3	kJ/mol	62.0188 ± 0.0016	107693-92-5*0
Nitrato		1290.61	1285.90	± 0.86	kJ/mol	62.00439 ± 0.00090	133057-96-2*0
Dibromovinylidene		509.9	498.8	± 4.1	kJ/mol	183.8294 ± 0.0026	261771-36-2*0
Fluorovinylidene		298.9	300.0	± 3.1	kJ/mol	44.0277 ± 0.0016	70302-00-0*0
Ethynol		406.6	403.3	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*12
Bromovinylidene		466.0	460.0	± 3.8	kJ/mol	104.9333 ± 0.0019	161957-27-3*0
Ethynol		95.3	92.8	± 1.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*0
Dinitrogen tetraoxide		-37.86	-27.01	± 0.19	kJ/mol	92.0111 ± 0.0012	10544-72-6*500
Chlorohydroxymethyl		-55.0	-60.8	± 1.1	kJ/mol	65.4787 ± 0.0012	147139-06-8*0
Water dimer cation		556.8	546.4	± 3.0	kJ/mol	36.03001 ± 0.00066	158061-35-9*0
Aminomethylidyne anion		481.6	478.0	± 3.2	kJ/mol	28.03387 ± 0.00082	96808-04-7*1
Fluoro(fluorooxy)methylene		-134.8	-136.0	± 1.3	kJ/mol	66.00691 ± 0.00085	479587-30-9*0
Imidogen		509.34	509.39	± 0.18	kJ/mol	15.014680 ± 0.000099	13774-92-0*2
Hydrogen peroxide cation		897.75	890.77	± 0.37	kJ/mol	34.01413 ± 0.00062	12325-10-9*0
Nitrosyl nitrate		48.3	40.4	± 1.8	kJ/mol	92.0111 ± 0.0012	15969-55-8*0
Hydrogen cyanide anion		129.510	129.031	± 0.090	kJ/mol	27.02593 ± 0.00081	12334-27-9*0
Chlorous acid anion		-154.3	-156.2	± 3.3	kJ/mol	68.4600 ± 0.0011	99559-66-7*0
Tetraoxidanyl		76.7	69.5	± 6.1	kJ/mol	65.0055 ± 0.0012	69696-93-1*1
Chlorine trifluoride anion		-480.4	-481.9	± 3.6	kJ/mol	92.44846 ± 0.00090	184289-50-7*0
Phosgene cation		897.1	896.0	± 1.7	kJ/mol	98.9150 ± 0.0020	73249-38-4*0
Phosgene			-242.73	± 0.27	kJ/mol	98.9155 ± 0.0020	75-44-5*501
Phosgene		-255.44	-242.73	± 0.27	kJ/mol	98.9155 ± 0.0020	75-44-5*502
Oxiranylium		901.2	893.2	± 1.5	kJ/mol	43.0441 ± 0.0016	57789-76-1*0
Chloro(chlorooxy)methylene		73.5	73.9	± 3.6	kJ/mol	98.9155 ± 0.0020	479587-31-0*0
Chloro(chlorooxy)methylene		98.	105.	± 15.	kJ/mol	98.9155 ± 0.0020	479587-31-0*1
Nitrogen atom		700.555	702.458	± 0.024	kJ/mol	14.006740 ± 0.000070	17778-88-0*2
Fluorine atom		82.090	83.875	± 0.048	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*2
mu-Oxodioxodinitrogen		984.0	981.0	± 3.2	kJ/mol	76.01113 ± 0.00091	87950-63-8*1
Oxiranyl anion		121.1	113.2	± 1.6	kJ/mol	43.0452 ± 0.0016	72722-59-9*0
Chlorohydroxymethylene		14.3	11.4	± 3.2	kJ/mol	64.4707 ± 0.0012	147723-60-2*2
Chlorohydroxymethylene		13.9	11.2	± 2.6	kJ/mol	64.4707 ± 0.0012	147723-60-2*0
Chloroethane		-134.28	-135.90	± 0.27	kJ/mol	64.5138 ± 0.0019	75-00-3*500
(Chlorooxy)methylene		155.4	155.2	± 3.7	kJ/mol	64.4707 ± 0.0012	331419-80-8*1
(Chlorooxy)methylene		119.1	117.8	± 2.7	kJ/mol	64.4707 ± 0.0012	331419-80-8*0
1-Propen-1-yl-3-ylidene		657.4	654.0	± 1.5	kJ/mol	39.0559 ± 0.0024	84654-90-0*0
1-Methoxyethenol		-284.7	-303.1	± 1.7	kJ/mol	74.0785 ± 0.0025	4453-91-2*0
Chloroformyl anion		-356.5	-352.9	± 3.3	kJ/mol	63.4633 ± 0.0012	41976-93-6*0
Nitrogen sesquioxide cation		1027.6	1023.7	± 4.8	kJ/mol	76.01113 ± 0.00091	10544-73-70
Propynylidene		597.6	599.4	± 1.3	kJ/mol	38.0480 ± 0.0024	67152-18-5*2
Formic acid cation		721.90	715.36	± 0.26	kJ/mol	46.0248 ± 0.0010	50614-05-6*0
Oxoiodonium		1066.1	1064.1	± 1.9	kJ/mol	142.90332 ± 0.00030	81182-81-2*0
Oxide		651.	653.	± 15.	kJ/mol	16.00050 ± 0.00030	16833-27-5*0
Dioxymethylene		341.8	339.8	± 3.0	kJ/mol	45.0174 ± 0.0010	438586-67-5*0
Hydrazoic acid anion		309.0	303.1	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*0
Formic acid anion		-256.2	-262.3	± 1.8	kJ/mol	46.0259 ± 0.0010	19066-82-1*0
2-Iodoethanol		-132.0	-150.2	± 2.5	kJ/mol	171.9650 ± 0.0017	624-76-0*0
Propargylenide		434.4	437.6	± 1.1	kJ/mol	38.0485 ± 0.0024	82906-05-6*0
Dioxohydrazine		172.89	171.13	± 0.14	kJ/mol	60.01228 ± 0.00062	16824-89-8*0
Hypochloroperoxoous acid, hydroxy ester		49.1	42.3	± 1.9	kJ/mol	84.4588 ± 0.0013	928652-99-7*0
Peroxyhypochlorous acid cation		1030.3	1024.5	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-20
2-Hydroxyethyl		-13.04	-26.30	± 0.61	kJ/mol	45.0605 ± 0.0017	4422-54-2*0
Methylaminyliumyl		1423.0	1416.1	± 2.6	kJ/mol	29.04071 ± 0.00083	56924-51-7*2
Isoformyl anion		55.7	58.4	± 1.8	kJ/mol	29.01859 ± 0.00086	81747-63-9*0
Carbonylmethyloxonium		561.4	553.1	± 3.2	kJ/mol	59.0435 ± 0.0017	24434-00-2*0
Nitrous acid anion		-105.85	-109.32	± 0.78	kJ/mol	47.01403 ± 0.00061	256393-36-9*0
Isocyanic acid anion		-54.2	-57.3	± 3.0	kJ/mol	43.02533 ± 0.00086	444010-28-00
Methoxyoxomethyl		-152.6	-160.2	± 1.5	kJ/mol	59.0440 ± 0.0017	16481-04-2*0
Diazene anion		265.5	258.7	± 2.0	kJ/mol	30.02991 ± 0.00020	100429-75-2*1
Hydrazoic acid			261.44	± 0.65	kJ/mol	43.02816 ± 0.00022	7782-79-8*500
Hydrodioxonitrogen cation		1129.7	1123.1	± 3.2	kJ/mol	47.01293 ± 0.00061	252986-76-8*0
Hydroxymethylene cation		971.9	968.3	± 1.4	kJ/mol	30.02543 ± 0.00087	135395-06-1*0
Ethylidene		361.35	354.37	± 0.76	kJ/mol	28.0532 ± 0.0016	4218-50-2*0
Dioxodiazoxane		93.0	88.1	± 1.3	kJ/mol	76.01168 ± 0.00091	122413-35-8*0
Methoxyoxomethyl		-151.8	-160.8	± 2.3	kJ/mol	59.0440 ± 0.0017	16481-04-2*2
Cyanic acid cation		1135.9	1133.3	± 2.9	kJ/mol	43.02423 ± 0.00086	59780-31-3*0
Methoxyoxomethyl		-151.7	-159.8	± 2.3	kJ/mol	59.0440 ± 0.0017	16481-04-2*3
Fluorosyl fluoride		192.6	193.1	± 2.3	kJ/mol	53.99621 ± 0.00030	86825-57-2*0
Cyanic acid anion		-9.1	-9.4	± 3.1	kJ/mol	43.02533 ± 0.00086	58199-47-6*0
Acetyloxoniumylidene		891.9	883.5	± 3.0	kJ/mol	59.0435 ± 0.0017	67057-47-0*1
Peroxyformyl		-100.46	-105.57	± 0.93	kJ/mol	61.0168 ± 0.0012	56240-83-6*0
Diazene		207.09	199.96	± 0.44	kJ/mol	30.02936 ± 0.00020	3618-05-1*1
Hydrazine anion		232.1	217.8	± 4.1	kJ/mol	32.04579 ± 0.00031	65391-88-0*0
Hydroxymethylene anion		147.1	144.2	± 1.6	kJ/mol	30.02653 ± 0.00087	207914-87-2*0
Cyanic fluoride cation		1294.5	1294.9	± 1.1	kJ/mol	45.01529 ± 0.00080	62532-69-8*0
Peroxyformate		-341.00	-346.45	± 0.96	kJ/mol	61.0174 ± 0.0012	104960-05-6*0
Cyanogen iodide cation		1271.5	1271.3	± 1.6	kJ/mol	152.92136 ± 0.00080	34749-78-5*0
Trihydrogen		254.5	250.7	± 1.2	kJ/mol	3.02382 ± 0.00021	12184-91-7*200
Methylaminyliumyl		1388.3	1382.0	± 2.6	kJ/mol	29.04071 ± 0.00083	56924-51-7*0
Pentachloroethylium		836.1	834.5	± 3.3	kJ/mol	201.2844 ± 0.0048	7094-17-90
O--HH Complex		247.6	248.9	± 2.7	kJ/mol	18.01528 ± 0.00033	7732-18-5101
Pentachloroethanide		-283.8	-282.3	± 3.9	kJ/mol	201.2854 ± 0.0048	263019-83-6*0
Isofulminic acid cation		1377.1	1375.0	± 2.9	kJ/mol	43.02423 ± 0.00086	117800-60-9*0
Hydrogen isocyanide anion		191.54	191.72	± 0.37	kJ/mol	27.02593 ± 0.00081	96913-22-3*0
Hydroxyamidogen		101.6	94.7	± 1.1	kJ/mol	32.02202 ± 0.00034	13940-32-4*0
Cyclopentadienide		100.0	87.0	± 1.1	kJ/mol	65.0937 ± 0.0040	12127-83-2*0
Cyanogen bromide cation		1331.2	1324.9	± 1.1	kJ/mol	105.9209 ± 0.0013	34749-77-4*0
Trihydrogen		477.4	474.7	± 2.3	kJ/mol	3.02382 ± 0.00021	12184-91-7*201
(Formyloxy)methyl		-151.8	-159.9	± 1.3	kJ/mol	59.0440 ± 0.0017	3122-12-1*0
Carboxymethyl		-227.3	-237.1	± 1.2	kJ/mol	59.0440 ± 0.0017	2887-46-9*0
trans-Cycloheptene		141.5	103.5	± 1.9	kJ/mol	96.1702 ± 0.0057	45509-99-7*0
Cyanic fluoride anion		-20.4	-18.4	± 2.9	kJ/mol	45.01639 ± 0.00080	34507-50-1*0
Nitrosyl nitrite anion		-103.1	-106.2	± 2.8	kJ/mol	76.01223 ± 0.00091	122413-35-80
Diazene cation		1132.46	1125.81	± 0.66	kJ/mol	30.02881 ± 0.00020	76986-17-9*0
Hydrogen peroxide			-190.76	± 0.30	kJ/mol	34.01468 ± 0.00062	7722-84-1*800
Iodine monochloride		-36.511	-35.537	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*500
Formylimidogen		245.3	242.2	± 4.6	kJ/mol	43.02478 ± 0.00086	42288-92-6*1
2-Methoxy-2-oxoethyl		-203.4	-218.6	± 1.6	kJ/mol	73.0706 ± 0.0025	54668-31-4*0
Water		-286.303	-285.831	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*499
Oxonium			-285.829	± 0.027	kJ/mol	19.02267 ± 0.00037	13968-08-6*800
Isocyanic fluoride anion		74.3	76.0	± 5.7	kJ/mol	45.01639 ± 0.00080	357426-78-9*0
Dicarbon monoxide		377.29	381.33	± 0.98	kJ/mol	40.0208 ± 0.0016	12071-23-7*0
3-Chloro-3-methyl-3H-diazirine		230.	218.	± 40.	kJ/mol	90.5114 ± 0.0019	4222-21-3*0
Phenol cation		746.18	727.39	± 0.65	kJ/mol	94.1107 ± 0.0048	40932-22-7*0
Phenol anion		22.8	7.9	± 4.9	kJ/mol	94.1118 ± 0.0048	38752-11-3*0
(Acetyloxy)methyl		-200.6	-214.3	± 1.6	kJ/mol	73.0706 ± 0.0025	2887-49-2*0
Isocyanogen bromide cation		1469.9	1464.2	± 5.9	kJ/mol	105.9209 ± 0.0013	238754-53-5*0
COC vdW		590.0	598.7	± 1.7	kJ/mol	40.0208 ± 0.0016	12071-24-80
Ethynol		455.7	452.3	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*14
1,2-Dichloroethene		3.46	-1.86	± 0.54	kJ/mol	96.9427 ± 0.0024	540-59-0*0
Chlorine pentafluoride cation		1005.8	996.8	± 3.3	kJ/mol	130.44417 ± 0.00090	478167-78-1*0
Benzaldehyde cation		896.7	880.1	± 1.9	kJ/mol	106.1214 ± 0.0056	80226-59-1*0
Benzaldehyde anion		-60.3	-77.9	± 1.2	kJ/mol	106.1225 ± 0.0056	34473-57-9*0
Water		-286.303	-292.744	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*509
Trihydrogen cation		1110.577	1106.695	± 0.013	kJ/mol	3.02327 ± 0.00021	28132-48-1*1
Isocyanomethane			146.5	± 2.3	kJ/mol	41.0520 ± 0.0016	593-75-9*500
Nitrogen atom anion		487.6	489.9	± 2.5	kJ/mol	14.007289 ± 0.000070	17778-87-9*0
Oxonium		605.90	599.08	± 0.17	kJ/mol	19.02267 ± 0.00037	13968-08-6*1
Diazoethenylidene cation		1771.3	1773.3	± 3.5	kJ/mol	52.0343 ± 0.0016	130760-10-00
C=O-C cation		1576.2	1583.3	± 2.4	kJ/mol	40.0203 ± 0.0016	83483-98-1*0
2-Cyclopropyn-1-ylidene		898.9	905.8	± 1.6	kJ/mol	36.0321 ± 0.0024	102508-15-6*0
1,2-Propadien-1-yl-3-ylidene anion		622.0	629.4	± 1.3	kJ/mol	36.0326 ± 0.0024	109292-47-9*1
Cyanogen chloride cation		1326.02	1327.35	± 0.97	kJ/mol	61.4696 ± 0.0012	37612-72-9*0
Propylidyne		492.5	482.8	± 1.2	kJ/mol	41.0718 ± 0.0024	85056-54-8*0
Cyanogen chloride anion		46.6	51.0	± 3.1	kJ/mol	61.4707 ± 0.0012	12281-43-5*0
Hydrogen peroxide cation		897.78	890.77	± 0.37	kJ/mol	34.01413 ± 0.00062	12325-10-9*12
Nitrosodioxaziridine		413.8	408.1	± 3.2	kJ/mol	76.01168 ± 0.00091	132871-99-9*2
2-Hydroxyethylium		1019.2	1007.1	± 1.6	kJ/mol	45.0600 ± 0.0017	38607-31-7*0
Bromine atom		161.998	155.935	± 0.056	kJ/mol	79.90400 ± 0.00100	10097-32-2*2
Dichlorovinylidene		421.6	424.8	± 3.0	kJ/mol	94.9268 ± 0.0024	20394-25-6*0
Chlorovinylidene		428.0	429.8	± 3.0	kJ/mol	60.4820 ± 0.0018	70277-82-6*0
Hydroxyaminylium		1019.6	1012.4	± 2.5	kJ/mol	32.02147 ± 0.00034	66097-71-0*0
Acetone enol		-151.8	-168.7	± 1.1	kJ/mol	58.0791 ± 0.0025	29456-04-0*0
Peroxychlorous acid		96.2	90.6	± 2.1	kJ/mol	84.4588 ± 0.0013	177778-92-6*0
Hydrogen peroxide cation		931.44	924.56	± 0.94	kJ/mol	34.01413 ± 0.00062	12325-10-9*21
Dichlorine cation		1108.287	1108.266	± 0.013	kJ/mol	70.9049 ± 0.0018	12595-90-3*0
Dioxyamidogen		251.1	244.5	± 2.5	kJ/mol	47.01348 ± 0.00061	71843-95-3*1
Hydrobromate ion		-6.0	-12.5	± 4.3	kJ/mol	80.9125 ± 0.0010	85532-97-4*0
Difluorodioxidane anion		-251.	-251.	± 28.	kJ/mol	69.99615 ± 0.00060	7783-45-10
Nitrosodioxaziridine		415.3	409.5	± 2.8	kJ/mol	76.01168 ± 0.00091	132871-99-9*3
Oxiranylidene		213.5	209.3	± 1.4	kJ/mol	42.0367 ± 0.0016	50983-85-2*0
Hydroperoxonium		762.5	752.7	± 2.0	kJ/mol	35.02207 ± 0.00064	70850-26-9*2
Methyl nitrite		-52.56	-64.52	± 0.90	kJ/mol	61.0401 ± 0.0010	624-91-9*1
Methyl nitrite			-88.91	± 0.56	kJ/mol	61.0401 ± 0.0010	624-91-9*500
Ethane anion		41.9	26.6	± 4.4	kJ/mol	30.0696 ± 0.0017	54064-82-3*0
2,2,4-Trimethylpentane		-171.3	-223.7	± 1.5	kJ/mol	114.2285 ± 0.0065	540-84-1*0
(Methylamino)methyl anion		200.9	184.0	± 3.2	kJ/mol	44.0763 ± 0.0017	31277-25-50
Diazoethenylidene anion		529.8	532.4	± 3.5	kJ/mol	52.0354 ± 0.0016	130760-11-10
Water		-238.647	-241.835	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*1
Oxoethylidene		261.2	258.4	± 1.6	kJ/mol	42.0367 ± 0.0016	39920-84-8*0
Fluoromethane cation		981.81	974.31	± 0.62	kJ/mol	34.03237 ± 0.00083	59122-96-2*0
Fluoromethane			-245.75	± 0.45	kJ/mol	34.03292 ± 0.00083	593-53-3*590
Diazene cation		1132.46	1125.53	± 0.66	kJ/mol	30.02881 ± 0.00020	76986-17-9*1
1-Propen-1-yl-3-ylidene		657.4	653.9	± 2.2	kJ/mol	39.0559 ± 0.0024	84654-90-0*12
Succinic acid		-795.63	-817.77	± 0.61	kJ/mol	118.0880 ± 0.0034	110-15-6*0
Oxirene		272.91	270.76	± 0.96	kJ/mol	42.0367 ± 0.0016	157-18-6*0
Oxirene		387.9	384.5	± 1.7	kJ/mol	42.0367 ± 0.0016	157-18-6*1
Hydroxyformyl		-181.19	-183.74	± 0.50	kJ/mol	45.0174 ± 0.0010	2564-86-5*0
Ethylene anion		232.0	225.6	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*0
Chloromethane		-106.46	-102.49	± 0.20	kJ/mol	50.4872 ± 0.0012	74-87-3*590
1-Propen-1-yl-3-ylidene		666.4	662.9	± 2.2	kJ/mol	39.0559 ± 0.0024	84654-90-0*13
(Dimethylamino)methyl anion		189.5	165.3	± 3.3	kJ/mol	58.1029 ± 0.0025	125231-49-4*0
1,1-Dibromoethane			-67.2	± 1.4	kJ/mol	187.8612 ± 0.0026	557-91-5*500
Methyl bromide cation		996.17	981.25	± 0.19	kJ/mol	94.9380 ± 0.0013	12538-70-4*0
Methoxyethene		-88.9	-106.2	± 1.1	kJ/mol	58.0791 ± 0.0025	107-25-5*0
Methyl iodide cation		944.72	935.32	± 0.18	kJ/mol	141.93844 ± 0.00083	12538-72-6*0
Diazenide		175.7	176.7	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*0
Fluoroform			-704.34	± 0.45	kJ/mol	70.01385 ± 0.00080	75-46-7*590
Carbon atom		1114.963	1120.110	± 0.048	kJ/mol	12.01070 ± 0.00080	7440-44-0*3
2-Oxo-1-ethylium-1-yl		1289.5	1286.8	± 2.7	kJ/mol	42.0361 ± 0.0016	214464-96-7*1
Trihydrogen		745.878	743.199	± 0.062	kJ/mol	3.02382 ± 0.00021	12184-91-7*0
3H-diazirin-3-ylidene-methylene		837.4	839.8	± 2.4	kJ/mol	52.0349 ± 0.0016	204253-88-3*0
Difluorodioxidanium		1283.6	1280.0	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-00
Krypton dication		3701.124	3701.124	± 0.013	kJ/mol	83.7989 ± 0.1000	18469-91-5*0
Hydroxyformyl anion		-319.52	-321.38	± 0.60	kJ/mol	45.0180 ± 0.0010	78944-70-4*0
Xenon dication		3194.14	3194.14	± 0.36	kJ/mol	131.2889 ± 0.0200	14066-95-6*0
Cyanogen		274.07	289.32	± 0.43	kJ/mol	52.0349 ± 0.0016	460-19-5*500
Water anion		-50.1	-53.0	± 4.3	kJ/mol	18.01583 ± 0.00033	12259-30-2*0
Cyanomethylium		1255.9	1253.2	± 1.9	kJ/mol	40.0435 ± 0.0016	34430-18-7*0
3-Buten-2-one		-95.61	-111.15	± 0.88	kJ/mol	70.0898 ± 0.0032	78-94-4*0
Bromoform			2.5	± 1.3	kJ/mol	252.7306 ± 0.0031	75-25-2*590
3-Buten-2-one		-94.0	-110.1	± 1.6	kJ/mol	70.0898 ± 0.0032	78-94-4*2
Methanediol		-379.39	-392.78	± 0.93	kJ/mol	48.0413 ± 0.0010	463-57-0*0
1,3-Butadien-2-ol		-48.4	-64.7	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*12
Isocyanogen chloride anion		102.7	107.2	± 3.9	kJ/mol	61.4707 ± 0.0012	923019-39-0*0
1,3-Butadien-2-ol		-38.3	-54.7	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*22
Dinitrogen anion		192.5	192.5	± 1.7	kJ/mol	28.01403 ± 0.00014	12185-02-3*0
1,3-Butadien-2-ol		-43.1	-59.1	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*2
1,3-Butadien-2-ol		-53.8	-68.7	± 1.6	kJ/mol	70.0898 ± 0.0032	59120-04-6*0
Nitrosodioxaziridine		413.6	408.2	± 1.8	kJ/mol	76.01168 ± 0.00091	132871-99-9*0
Isocyanogen anion		385.5	387.6	± 3.4	kJ/mol	52.0354 ± 0.0016	83951-85-30
Ethynol cation		1063.8	1061.2	± 3.1	kJ/mol	42.0361 ± 0.0016	84005-02-7*0
Difluoromethane			-466.89	± 0.38	kJ/mol	52.02339 ± 0.00081	75-10-5*590
Hydroperoxyimidogen		111.8	108.9	± 2.8	kJ/mol	47.01348 ± 0.00061	877456-58-1*2
Chlorine chlorite		168.6	166.4	± 1.3	kJ/mol	102.9042 ± 0.0019	105206-44-8*0
Methane anion		27.3	19.4	± 5.1	kJ/mol	16.04301 ± 0.00085	27680-53-1*0
1,2-Propadien-1-one anion		49.5	48.3	± 3.1	kJ/mol	54.0479 ± 0.0024	159171-62-7*0
Carbon atom		2.391	1.863	± 0.044	kJ/mol	12.01070 ± 0.00080	7440-44-0*501
1-Propen-1-yl-3-ylidene		699.9	697.0	± 3.5	kJ/mol	39.0559 ± 0.0024	84654-90-0*2
Methoxyethene		-81.5	-98.6	± 2.4	kJ/mol	58.0791 ± 0.0025	107-25-5*1
2-Cyclopropen-1-one cation		1078.6	1075.2	± 2.0	kJ/mol	54.0468 ± 0.0024	100815-68-7*0
Trioxodinitrate anion		-104.3	-107.5	± 1.9	kJ/mol	76.01223 ± 0.00091	194856-62-7*0
Peroxyhypochlorous acid anion		-32.2	-34.0	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-30
Neon dication		6032.988	6033.214	± 0.0041	kJ/mol	20.17860 ± 0.00060	14041-55-5*0
Neon trication		12152.403	12152.403	± 0.033	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	± 1.5	kJ/mol	20.17586 ± 0.00060	14175-50-9*0
Neon octacation		92018.2	92018.2	± 1.5	kJ/mol	20.17531 ± 0.00060	14782-26-4*0
Neon nonacation		207396.1	207396.1	± 1.5	kJ/mol	20.17476 ± 0.00060	15721-59-2*0
Neon cation		2080.662	2080.769	± 0.000	kJ/mol	20.17915 ± 0.00060	14782-23-1*0
Neon decacation		338828.3	338828.3	± 1.5	kJ/mol	20.17421 ± 0.00060	32218-07-8*0
Argon dimer cation		1393.760	1391.173	± 0.018	kJ/mol	79.8955 ± 0.0020	17596-58-6*0
Argon cation		1520.571	1520.580	± 0.000	kJ/mol	39.94745 ± 0.00100	14791-69-6*0
Argon dimer		-1.013	-6.347	± 0.0051	kJ/mol	79.8960 ± 0.0020	12595-59-4*0
Helium cation		2372.322	2372.322	± 0.000	kJ/mol	4.0020534 ± 0.0000020	14234-48-1*0
Helium dication		7622.839	7622.839	± 0.000	kJ/mol	4.0015048 ± 0.0000020	12587-46-1*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		1868.43	1868.43	± 0.11	kJ/mol	4.0031506 ± 0.0000020	14452-58-5*2
Helium anion		1904.823	1904.824	± 0.0011	kJ/mol	4.0031506 ± 0.0000020	14452-58-5*3
Helium anion		5724.9	5724.9	± 1.5	kJ/mol	4.0031506 ± 0.0000020	14452-58-5*4
Argon anion		1111.116	1111.116	± 0.098	kJ/mol	39.94855 ± 0.00100	16544-90-4*2
Hydron		0	0	exact		1.007391 ± 0.000070	12408-02-5*800

References (for your convenience, also available in RIS and BibTex format)

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. 1.122e of the Thermochemical Network, Argonne National Laboratory (2019); available at ATcT.anl.gov
4		L. Cheng, J. Gauss, B. Ruscic, P. Armentrout, and J. Stanton, Bond Dissociation Energies for Diatomic Molecules Containing 3d Transition Metals: Benchmark Scalar-Relativistic Coupled-Cluster Calculations for Twenty Molecules. J. Chem. Theory Comput. 13, 1044-1056 (2017) [DOI: 10.1021/acs.jctc.6b00970]
5		J. P. Porterfield, D. H. Bross, B. Ruscic, J. H. Thorpe, T. L. Nguyen, J. H. Baraban, J. F. Stanton, J. W. Daily, and G. B. Ellison, Thermal Decomposition of Potential Ester Biofuels, Part I: Methyl Acetate and Methyl Butanoate. J. Chem. Phys. A 121, 4658-4677 (2017) [DOI: 10.1021/acs.jpca.7b02639] (Veronica Vaida Festschrift)
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]

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]).
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.

Page generated: 04/18/2025

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