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

Below is a list of 0 K and 298.15 K enthalpies of formation for all 1617 species included in version 1.122h.
This version of ATcT results was generated from an expansion of version 1.122e [4] to include results centered on the determination of the appearance energy of CH₃⁺ from CH₄. [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].

Species:

(chemical formulas are case sensitive)

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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		711.399	716.885	± 0.047	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	± 0.055	kJ/mol	16.04246 ± 0.00085	74-82-8*0
Ethane		-68.35	-83.97	± 0.13	kJ/mol	30.0690 ± 0.0017	74-84-0*0
Water		-286.302	-285.830	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*500
Water		-238.932	-241.836	± 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		-190.01	-200.89	± 0.15	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		37.248	37.488	± 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		149.872	146.458	± 0.059	kJ/mol	15.03452 ± 0.00083	2229-07-4*0
Propane		-82.75	-105.03	± 0.18	kJ/mol	44.0956 ± 0.0025	74-98-6*0
Formaldehyde		-105.379	-109.218	± 0.098	kJ/mol	30.02598 ± 0.00087	50-00-0*0
Hydrogen fluoride		-272.677	-272.724	± 0.049	kJ/mol	20.006343 ± 0.000070	7664-39-3*0
Hydrogen bromide		-27.98	-35.82	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*0
Ethanol		-217.30	-235.02	± 0.22	kJ/mol	46.0684 ± 0.0017	64-17-5*0
Iodine atom		107.157	106.757	± 0.0021	kJ/mol	126.904470 ± 0.000030	14362-44-8*0
Ethyl		131.06	119.99	± 0.27	kJ/mol	29.0611 ± 0.0016	2025-56-1*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		-74.61	-82.54	± 0.19	kJ/mol	50.4872 ± 0.0012	74-87-3*0
Hydrogen cyanide		129.661	129.276	± 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		34.93	19.93	± 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		-139.093	-139.060	± 0.027	kJ/mol	17.00789 ± 0.00031	14280-30-9*0
Dioxidanyl		15.12	12.22	± 0.15	kJ/mol	33.00674 ± 0.00060	3170-83-0*0
Hydrogen iodide		28.645	26.470	± 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		-155.16	-165.64	± 0.26	kJ/mol	44.0526 ± 0.0017	75-07-0*0
Hydrogen peroxide		-129.480	-135.466	± 0.063	kJ/mol	34.01468 ± 0.00062	7722-84-1*0
Bromomethane		-20.88	-36.28	± 0.18	kJ/mol	94.9385 ± 0.0013	74-83-9*0
n-Butane		-98.47	-125.78	± 0.26	kJ/mol	58.1222 ± 0.0033	106-97-8*0
Benzene		100.62	83.10	± 0.23	kJ/mol	78.1118 ± 0.0048	71-43-2*0
Methylene		428.73	429.14	± 0.11	kJ/mol	14.02658 ± 0.00081	2465-56-7*2
Hypochlorous acid		-73.869	-76.809	± 0.027	kJ/mol	52.46004 ± 0.00095	7790-92-3*0
Propyne		192.79	185.73	± 0.24	kJ/mol	40.0639 ± 0.0024	74-99-7*0
Formic acid		-371.10	-378.42	± 0.22	kJ/mol	46.0254 ± 0.0010	64-18-6*1
Dibromine		45.67	30.88	± 0.11	kJ/mol	159.8080 ± 0.0020	7726-95-6*0
Methylene		391.068	391.625	± 0.098	kJ/mol	14.02658 ± 0.00081	2465-56-7*1
Fluoride		-250.910	-249.125	± 0.048	kJ/mol	18.99895178 ± 0.00000050	16984-48-8*0
Ketene		-45.34	-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		592.825	596.159	± 0.099	kJ/mol	13.01864 ± 0.00080	3315-37-5*0
Diiodine		65.497	62.417	± 0.0041	kJ/mol	253.808940 ± 0.000060	7553-56-2*0
Toluene		73.29	50.01	± 0.34	kJ/mol	92.1384 ± 0.0056	108-88-3*0
Fluoroform		-688.92	-695.87	± 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	902.76	± 0.31	kJ/mol	29.0606 ± 0.0016	14936-94-8*0
Acetone		-200.21	-216.90	± 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		-51.63	-62.11	± 0.47	kJ/mol	96.9113 ± 0.0010	13517-11-8*0
Vinyl		301.13	296.93	± 0.34	kJ/mol	27.0452 ± 0.0016	2669-89-8*0
Methoxy		28.85	21.48	± 0.29	kJ/mol	31.03392 ± 0.00088	2143-68-2*0
Acetic acid		-418.88	-433.01	± 0.43	kJ/mol	60.0520 ± 0.0017	64-19-7*1
Chlorooxidanyl		101.125	101.716	± 0.035	kJ/mol	51.45210 ± 0.00095	14989-30-1*0
Methylamine		-7.02	-21.73	± 0.31	kJ/mol	31.05714 ± 0.00088	74-89-5*0
Methoxide		-122.63	-130.35	± 0.30	kJ/mol	31.03447 ± 0.00088	3315-60-4*0
Hydroxymethyl		-10.46	-16.77	± 0.28	kJ/mol	31.03392 ± 0.00088	2597-43-5*0
Oxomethylium		827.772	827.188	± 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		125.31	110.83	± 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	440.01	± 0.15	kJ/mol	26.01744 ± 0.00080	2074-87-5*0
Dioxymethyl	$[O-]\[O+]=C$	111.88	104.87	± 0.63	kJ/mol	46.0254 ± 0.0010	56077-92-0*0
Difluorophosgene		-603.38	-606.48	± 0.41	kJ/mol	66.00691 ± 0.00085	353-50-4*0
Phenyl		350.24	336.88	± 0.54	kJ/mol	77.1039 ± 0.0048	2396-01-2*0
Nitric acid		-124.50	-134.21	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*0
Formyl		41.396	41.773	± 0.098	kJ/mol	29.01804 ± 0.00086	2597-44-6*0
Allyl		180.03	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		-106.04	-134.64	± 0.31	kJ/mol	58.1222 ± 0.0033	75-28-5*0
Methylium		1099.340	1095.396	± 0.056	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	± 0.37	kJ/mol	39.0559 ± 0.0024	2932-78-7*0
Dichloromethane		-87.13	-93.99	± 0.50	kJ/mol	84.9320 ± 0.0020	75-09-2*0
Vinyl chloride		29.26	21.67	± 0.30	kJ/mol	62.4979 ± 0.0018	75-01-4*0
Cyanogen bromide		186.7	180.2	± 1.1	kJ/mol	105.9214 ± 0.0013	506-68-3*0
Iodomethane		24.50	14.97	± 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		-163.65	-178.59	± 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		105.32	88.45	± 0.53	kJ/mol	43.0877 ± 0.0024	2025-55-0*0
2-Hydroxyethyl		-13.06	-26.32	± 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		-115.11	-127.93	± 0.72	kJ/mol	48.0413 ± 0.0010	3031-73-0*0
Methylperoxy		22.23	12.59	± 0.48	kJ/mol	47.0333 ± 0.0010	2143-58-0*0
Propynylidene		543.41	546.40	± 0.64	kJ/mol	38.0480 ± 0.0024	67152-18-5*1
Ethenol		-112.73	-123.93	± 0.66	kJ/mol	44.0526 ± 0.0017	557-75-5*1
Chloroform		-97.50	-102.41	± 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	823.62	± 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		-42.28	-55.71	± 0.65	kJ/mol	45.0605 ± 0.0017	2348-46-1*1
Hydroxyformyl		-181.20	-184.17	± 0.50	kJ/mol	45.0174 ± 0.0010	2564-86-5*1
Formate		-463.16	-466.80	± 0.56	kJ/mol	45.0180 ± 0.0010	71-47-6*0
Methyl formate		-346.78	-359.83	± 0.87	kJ/mol	60.0520 ± 0.0017	107-31-3*1
Tetrafluoroethylene		-671.20	-674.60	± 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
Ethyl bromide		-41.40	-63.35	± 0.25	kJ/mol	108.9651 ± 0.0019	74-96-4*0
Vinyl bromide		88.56	73.76	± 0.58	kJ/mol	106.9492 ± 0.0019	593-60-2*0
Chlorine fluoride		-55.620	-55.715	± 0.055	kJ/mol	54.45110 ± 0.00090	7790-89-8*0
Diazynium		1042.54	1038.93	± 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	-79.149	± 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		102.74	80.23	± 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		-166.38	-183.89	± 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		-394.28	-413.15	± 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		921.95	911.70	± 0.45	kJ/mol	17.04985 ± 0.00087	15135-49-6*0
Oxirane		-40.06	-52.60	± 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	$C/C=C\C$	14.19	-7.08	± 0.41	kJ/mol	56.1063 ± 0.0032	590-18-1*0
Formic acid		-354.76	-361.86	± 0.38	kJ/mol	46.0254 ± 0.0010	64-18-6*2
Methanetetraylbisamidogen		450.42	450.83	± 0.64	kJ/mol	40.02418 ± 0.00081	2669-76-3*0
Fluoroethane		-257.23	-272.09	± 0.36	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
Fluorobenzene		-99.08	-114.76	± 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	98.86	± 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		155.31	144.23	± 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		-279.35	-288.69	± 0.90	kJ/mol	62.0248 ± 0.0012	107-32-4*1
Cyclopropane		70.98	53.85	± 0.41	kJ/mol	42.0797 ± 0.0024	75-19-4*0
Propadienylidene		554.41	555.55	± 0.41	kJ/mol	38.0480 ± 0.0024	60731-10-4*0
Ethoxy		1.48	-12.42	± 0.48	kJ/mol	45.0605 ± 0.0017	2154-50-9*51
Acetyl		-3.34	-10.00	± 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
Phenolate		-146.35	-161.82	± 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		274.42	261.31	± 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
Fluorodioxidanyl		26.80	25.09	± 0.26	kJ/mol	50.99720 ± 0.00060	15499-23-7*0
Hypobromite		-96.15	-103.63	± 0.53	kJ/mol	95.9039 ± 0.0010	14380-62-2*0
Peroxynitrous acid		-5.81	-14.25	± 0.36	kJ/mol	63.01288 ± 0.00091	14691-52-2*3
Cyanide		63.956	67.242	± 0.094	kJ/mol	26.01799 ± 0.00080	57-12-5*0
Isobutene		4.01	-17.05	± 0.42	kJ/mol	56.1063 ± 0.0032	115-11-7*0
1-Butene		21.00	0.05	± 0.38	kJ/mol	56.1063 ± 0.0032	106-98-9*0
n-Pentane		-114.41	-146.28	± 0.31	kJ/mol	72.1488 ± 0.0041	109-66-0*0
Dichloromethylene		229.49	230.67	± 0.64	kJ/mol	82.9161 ± 0.0020	1605-72-7*2
Hydrogen fluoride			-334.49	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*800
Vinyl fluoride		-134.54	-142.35	± 0.46	kJ/mol	46.0436 ± 0.0016	75-02-5*0
Chlorobenzene		67.14	52.18	± 0.61	kJ/mol	112.5566 ± 0.0049	108-90-7*0
Difluorodioxidane		35.27	31.54	± 0.41	kJ/mol	69.99561 ± 0.00060	7783-44-0*0
Water			-285.830	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*590
Nitrous oxide		85.997	82.567	± 0.097	kJ/mol	44.01288 ± 0.00033	10024-97-2*0
(E)-Diazene		207.10	199.95	± 0.44	kJ/mol	30.02936 ± 0.00020	15626-43-4*0
Hydroxyoxomethylium		600.65	597.57	± 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		1118.94	1115.50	± 0.57	kJ/mol	27.0447 ± 0.0016	14604-48-9*0
Hydroxymethylium		717.70	709.76	± 0.18	kJ/mol	31.03337 ± 0.00088	18682-95-6*0
Cyanogen		308.31	310.25	± 0.43	kJ/mol	52.0349 ± 0.0016	460-19-5*0
Peroxyformyl		-100.46	-105.76	± 0.93	kJ/mol	61.0168 ± 0.0012	56240-83-6*1
Dioxidanide		-88.87	-91.53	± 0.34	kJ/mol	33.00729 ± 0.00060	14691-59-9*0
Cyclopropene		292.33	283.60	± 0.53	kJ/mol	40.0639 ± 0.0024	2781-85-3*0
n-Hexane		-130.05	-166.92	± 0.34	kJ/mol	86.1754 ± 0.0049	110-54-3*0
Trioxidane		-82.04	-90.88	± 0.70	kJ/mol	50.01408 ± 0.00091	14699-99-1*1
Formic acid		-371.10	-378.40	± 0.22	kJ/mol	46.0254 ± 0.0010	64-18-6*0
Methyl formate		-326.7	-339.2	± 1.2	kJ/mol	60.0520 ± 0.0017	107-31-3*2
Trichloromethyl		71.95	71.48	± 0.84	kJ/mol	118.3688 ± 0.0028	3170-80-7*0
1,1-Dichloroethane		-120.33	-133.11	± 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		-19.40	-37.19	± 0.92	kJ/mol	106.1219 ± 0.0056	100-52-7*0
Chlorous acid		25.73	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		101.5	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
Hypofluorite		-108.85	-108.68	± 0.48	kJ/mol	34.99835 ± 0.00030	12763-66-5*0
Cyanogen iodide		222.7	222.2	± 1.6	kJ/mol	152.92191 ± 0.00080	506-78-5*0
Formyl anion		11.60	11.98	± 0.44	kJ/mol	29.01859 ± 0.00086	57340-31-5*0
2-Propynylidyne		717.99	722.34	± 0.82	kJ/mol	37.0400 ± 0.0024	53590-28-6*0
Cyclopentane		-43.97	-76.53	± 0.41	kJ/mol	70.1329 ± 0.0041	287-92-3*0
Ethoxy		5.74	-8.69	± 0.48	kJ/mol	45.0605 ± 0.0017	2154-50-9*52
Chloromethylene		320.26	320.55	± 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		244.37	230.95	± 0.39	kJ/mol	77.1044 ± 0.0048	30922-78-2*0
3-Buten-2-one		-95.65	-111.90	± 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	858.07	± 0.62	kJ/mol	31.0764 ± 0.0017	24669-33-8*1
Acetylium		666.41	659.13	± 0.46	kJ/mol	43.0441 ± 0.0016	15762-07-9*0
Hydroxymethylene		112.67	108.90	± 0.28	kJ/mol	30.02598 ± 0.00087	19710-56-6*1
Carbonic acid		-602.76	-612.93	± 0.75	kJ/mol	62.0248 ± 0.0012	463-79-6*1
Peroxyformate		-341.00	-346.45	± 0.96	kJ/mol	61.0174 ± 0.0012	104960-05-6*1
Isoprene		96.09	75.57	± 0.67	kJ/mol	68.1170 ± 0.0040	78-79-5*0
Hydrogen bromide			-120.96	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*800
1-Hydroxyethylium		608.78	594.35	± 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
Formyloxidanyl		-125.82	-127.48	± 0.56	kJ/mol	45.0174 ± 0.0010	16499-21-1*1
Trimethylamine		1.16	-27.70	± 0.92	kJ/mol	59.1103 ± 0.0025	75-50-3*0
1,1,1-Trichloroethane		-134.34	-144.92	± 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		148.38	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		-171.39	-186.79	± 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
Trioxidanide		-120.0	-123.1	± 1.6	kJ/mol	49.00669 ± 0.00090	89965-38-8*2
Hydrogen chloride			-166.991	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*800
Methanide		141.08	137.64	± 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
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		159.35	146.38	± 0.58	kJ/mol	54.0904 ± 0.0032	503-17-3*0
1-Methylethenyl		262.98	252.58	± 0.77	kJ/mol	41.0718 ± 0.0024	15552-77-9*0
trans-2-Butene		9.38	-11.18	± 0.41	kJ/mol	56.1063 ± 0.0032	624-64-6*0
iso-Pentane		-119.17	-153.22	± 0.43	kJ/mol	72.1488 ± 0.0041	78-78-4*0
1-Hydroxyethyl		-40.73	-54.20	± 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	178.23	± 0.59	kJ/mol	41.0287 ± 0.0016	51095-15-9*0
Methanediol		-379.38	-393.58	± 0.93	kJ/mol	48.0413 ± 0.0010	463-57-0*1
Methoxyethane		-194.08	-216.97	± 0.48	kJ/mol	60.0950 ± 0.0025	540-67-0*0
Acetic acid		-397.89	-411.66	± 0.84	kJ/mol	60.0520 ± 0.0017	64-19-7*2
Acetyl chloride		-232.61	-241.60	± 0.33	kJ/mol	78.4973 ± 0.0019	75-36-5*0
Chlorohydroxymethyl		-54.9	-60.9	± 1.1	kJ/mol	65.4787 ± 0.0012	147139-06-8*1
1,1-Dichloroethene		8.92	2.93	± 0.49	kJ/mol	96.9427 ± 0.0024	75-35-4*0
Dichlorodifluoromethane		-490.38	-495.15	± 0.97	kJ/mol	120.9129 ± 0.0020	75-71-8*0
Fluorodichloromethane		-278.7	-284.0	± 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	± 0.60	kJ/mol	91.1305 ± 0.0056	2154-56-5*0
Methyl nitrite		-55.62	-67.40	± 0.45	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
Chlorine atom cation		1370.806	1372.602	± 0.0011	kJ/mol	35.45215 ± 0.00090	24203-47-2*0
Hypoiodite		-102.48	-104.29	± 0.88	kJ/mol	142.90442 ± 0.00030	15065-65-3*0
Dinitrogen cation		1503.311	1503.312	± 0.000	kJ/mol	28.01293 ± 0.00014	13966-04-6*0
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
Dichloride		-229.8	-228.7	± 1.4	kJ/mol	70.9059 ± 0.0018	12595-89-0*0
Methylamidogen		187.20	176.55	± 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
Chlorine pentafluoride		-226.1	-234.2	± 1.7	kJ/mol	130.44472 ± 0.00090	13637-63-3*0
iso-Propylium		822.91	805.83	± 0.25	kJ/mol	43.0871 ± 0.0024	19252-53-0*0
n-Propylide		122.9	105.2	± 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
t-Butyl		75.60	50.30	± 0.66	kJ/mol	57.1143 ± 0.0033	1605-73-8*0
neo-Pentane		-134.63	-167.51	± 0.40	kJ/mol	72.1488 ± 0.0041	463-82-1*0
2-Hydroxyethyl		-10.23	-22.86	± 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		-369.08	-382.23	± 0.96	kJ/mol	48.0413 ± 0.0010	463-57-0*2
Methoxyethene		-88.9	-106.8	± 1.1	kJ/mol	58.0791 ± 0.0025	107-25-5*2
Methyl acetate		-363.4	-382.2	± 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		-32.71	-41.86	± 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		-232.3	-242.6	± 1.2	kJ/mol	66.4866 ± 0.0013	15454-33-8*0
Chloromethoxy		-12.0	-18.9	± 1.1	kJ/mol	65.4787 ± 0.0012	114282-89-2*0
Tetraiodomethane		332.0	326.9	± 4.1	kJ/mol	519.62858 ± 0.00081	507-25-5*0
2-Chloroethanol		-249.86	-266.57	± 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		-19.12	-31.83	± 0.98	kJ/mol	57.0712 ± 0.0024	3122-07-4*0
Bromanylium		1257.774	1251.711	± 0.056	kJ/mol	79.90345 ± 0.00100	22541-56-6*0
Water dimer		-491.085	-499.125	± 0.052	kJ/mol	36.03056 ± 0.00066	25655-83-8*0
Fluoronium		774.10	771.16	± 0.88	kJ/mol	21.01373 ± 0.00014	12206-67-6*2
Dioxodiazoxane		93.0	87.9	± 1.3	kJ/mol	76.01168 ± 0.00091	122413-35-8*1
Nitric acid			-206.64	± 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		589.623	594.769	± 0.048	kJ/mol	12.01125 ± 0.00080	14337-00-9*0
2-Hydrotrioxy		299.6	293.9	± 1.2	kJ/mol	49.00614 ± 0.00090	12500-78-60
Hydrogen fluoride			-321.03	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*818
Difluoride		-291.0	-290.2	± 1.5	kJ/mol	37.9973550 ± 0.0000010	12184-85-9*0
Ethylidyne		508.53	504.83	± 0.80	kJ/mol	27.0452 ± 0.0016	67624-57-1*0
Methylamidogen anion		144.88	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
Chloroacetylene		228.14	229.00	± 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	105.64	± 0.41	kJ/mol	44.0277 ± 0.0016	2713-09-9*0
Methylperoxy anion		-89.94	-100.09	± 0.65	kJ/mol	47.0339 ± 0.0010	35683-44-4*0
1-Propenyl		278.22	267.38	± 0.78	kJ/mol	41.0718 ± 0.0024	6067-68-1*2
Propylidyne		492.4	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		179.42	165.84	± 0.67	kJ/mol	54.0904 ± 0.0032	107-00-6*0
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		95.4	92.9	± 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	-322.11	± 0.60	kJ/mol	45.0180 ± 0.0010	78944-70-4*2
Ethoxyethane		-222.75	-250.17	± 0.80	kJ/mol	74.1216 ± 0.0033	60-29-7*0
Acetone enol		-151.9	-169.2	± 1.1	kJ/mol	58.0791 ± 0.0025	29456-04-0*1
Chlorodioxidanyl		103.91	102.82	± 0.37	kJ/mol	67.4515 ± 0.0011	17376-09-9*0
Acetate		-496.6	-505.7	± 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
Chloric acid		2.1	-5.0	± 1.6	kJ/mol	84.4588 ± 0.0013	7790-93-4*0
Hexachloroethane		-147.0	-149.4	± 1.3	kJ/mol	236.7376 ± 0.0056	67-72-1*0
cis-1,2-Dichloroethene	$C(\Cl)=C\Cl$	3.45	-2.54	± 0.54	kJ/mol	96.9427 ± 0.0024	156-59-2*0
Dichloroacetylene		230.05	233.36	± 0.95	kJ/mol	94.9268 ± 0.0024	7572-29-4*0
Fluorotrichloromethane		-286.4	-289.6	± 1.2	kJ/mol	137.3672 ± 0.0028	75-69-4*0
Perchloryl		191.68	186.01	± 0.61	kJ/mol	83.4509 ± 0.0013	13932-10-0*0
Difluoromethylene		-193.93	-193.46	± 0.38	kJ/mol	50.00751 ± 0.00080	2154-59-8*0
Chlorate		-207.3	-212.8	± 1.6	kJ/mol	83.4514 ± 0.0013	14866-68-3*0
Hexafluoroethane		-1334.9	-1343.2	± 1.0	kJ/mol	138.0118 ± 0.0016	76-16-4*0
1,1-Difluoroethane		-489.17	-502.90	± 0.56	kJ/mol	66.0500 ± 0.0016	75-37-6*0
1,1-Difluoroethene		-343.65	-350.71	± 0.82	kJ/mol	64.0341 ± 0.0016	75-38-7*0
2-Fluoroethanol		-405.76	-423.00	± 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		58.17	29.71	± 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		-187.95	-201.51	± 0.98	kJ/mol	57.0717 ± 0.0024	24262-31-5*0
Propadienone		131.96	130.32	± 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		307.53	300.45	± 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		1797.852	1803.450	± 0.047	kJ/mol	12.01015 ± 0.00080	14067-05-1*0
Oxygen atom		436.666	438.523	± 0.0021	kJ/mol	15.99940 ± 0.00030	17778-80-2*2
Methyliumylidene		1619.757	1623.100	± 0.055	kJ/mol	13.01809 ± 0.00080	24361-82-8*0
Dioxygen anion		-43.36	-42.72	± 0.17	kJ/mol	31.99935 ± 0.00060	11062-77-4*0
Ethylidyne		508.53	504.83	± 0.80	kJ/mol	27.0452 ± 0.0016	67624-57-1*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
Hydroxyde			-230.014	± 0.029	kJ/mol	17.00789 ± 0.00031	14280-30-9*800
Nitrilomethylium		1776.9	1780.4	± 1.3	kJ/mol	26.01689 ± 0.00080	12539-57-0*0
Methanol cation		856.84	846.52	± 0.32	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		-596.90	-607.01	± 0.83	kJ/mol	62.0248 ± 0.0012	463-79-6*2
Carbonic acid		-561.67	-570.51	± 0.97	kJ/mol	62.0248 ± 0.0012	463-79-6*3
Hydrogen carbonate		-720.6	-726.9	± 1.4	kJ/mol	61.0174 ± 0.0012	71-52-3*0
Ozonide		-58.48	-60.84	± 0.21	kJ/mol	47.99875 ± 0.00090	12596-80-4*0
n-Propylium		856.96	838.68	± 0.86	kJ/mol	43.0871 ± 0.0024	19252-52-9*0
Allyl anion		134.13	123.12	± 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		624.5	613.0	± 1.3	kJ/mol	41.0718 ± 0.0024	85056-54-8*2
1-Propynylide		264.21	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		90.84	66.07	± 0.95	kJ/mol	57.1143 ± 0.0033	2348-55-2*0
Cyclohexane		-83.57	-123.13	± 0.36	kJ/mol	84.1595 ± 0.0049	110-82-7*0
Trioxygen difluoride		112.2	106.5	± 1.1	kJ/mol	85.99501 ± 0.00090	16829-28-0*1
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		9.41	1.75	± 0.55	kJ/mol	46.0254 ± 0.0010	157-26-6*0
Hydroxyformyl anion		-313.70	-315.51	± 0.61	kJ/mol	45.0180 ± 0.0010	78944-70-4*1
Bromochlorane		21.879	14.435	± 0.060	kJ/mol	115.3567 ± 0.0013	13863-41-7*0
Ethoxyethene		-117.4	-141.1	± 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
Oxidanylium		1293.188	1293.217	± 0.035	kJ/mol	17.00679 ± 0.00031	12259-29-9*0
Acetic acid		-418.88	-433.01	± 0.43	kJ/mol	60.0520 ± 0.0017	64-19-7*0
Ethyl formate		-375.1	-393.7	± 1.2	kJ/mol	74.0785 ± 0.0025	109-94-4*1
Methoxyoxomethyl		-152.5	-160.6	± 1.5	kJ/mol	59.0440 ± 0.0017	16481-04-2*1
(Formyloxy)methyl		-151.9	-160.0	± 1.3	kJ/mol	59.0440 ± 0.0017	3122-12-1*1
Carboxymethyl		-227.4	-237.3	± 1.2	kJ/mol	59.0440 ± 0.0017	2887-46-9*1
Ethylene glycol		-369.75	-389.37	± 0.40	kJ/mol	62.0678 ± 0.0018	107-21-1*0
(Methylamino)methyl cation		728.81	710.19	± 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
Dichloromethyl		92.08	90.17	± 0.88	kJ/mol	83.9240 ± 0.0020	3474-12-2*0
Chloromethyl		118.35	115.28	± 0.87	kJ/mol	49.4793 ± 0.0012	6806-86-6*0
Methyl hypochlorite		-53.1	-63.0	± 1.4	kJ/mol	66.4866 ± 0.0013	593-78-2*0
Hypochloroperoxoous acid, hydroxy ester		49.1	42.2	± 1.9	kJ/mol	84.4588 ± 0.0013	928652-99-7*1
1,2-Dichloroethane		-118.57	-130.51	± 0.54	kJ/mol	98.9586 ± 0.0024	107-06-2*0
Chlorofluoromethane		-256.3	-263.4	± 1.3	kJ/mol	68.4777 ± 0.0012	593-70-4*0
Difluoromethyliumyl		908.13	908.56	± 0.78	kJ/mol	50.00696 ± 0.00080	54250-40-7*0
Trioxidanyl		25.32	23.33	± 0.13	kJ/mol	49.00614 ± 0.00090	12500-78-6*1
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
1,3-Butadiyne		458.32	460.05	± 0.82	kJ/mol	50.0587 ± 0.0032	460-12-8*0
o-Benzyne anion		413.71	404.60	± 0.97	kJ/mol	76.0965 ± 0.0048	100569-88-8*0
Cycloheptene		28.11	-9.12	± 0.75	kJ/mol	96.1702 ± 0.0057	628-92-2*0
Cycloheptatriene		206.92	183.50	± 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
Chlorine difluoride		-47.2	-48.3	± 1.4	kJ/mol	73.44951 ± 0.00090	24801-48-7*0
Bifluoride		-481.8	-480.6	± 1.9	kJ/mol	39.005295 ± 0.000070	18130-74-02
Diazenyl		252.17	249.25	± 0.47	kJ/mol	29.02142 ± 0.00016	36882-13-0*0
Trioxidanylium		1070.6	1064.3	± 1.4	kJ/mol	49.00559 ± 0.00090	74241-49-9*1
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
Methane cation		1150.673	1144.290	± 0.066	kJ/mol	16.04191 ± 0.00085	20741-88-2*0
Oxoniumyl ion		978.466	975.563	± 0.028	kJ/mol	18.01473 ± 0.00033	56583-62-1*0
Hydrogen chloride			-165.757	± 0.025	kJ/mol	36.46064 ± 0.00090	7647-01-0*828
Ethanium		874.34	858.10	± 0.62	kJ/mol	31.0764 ± 0.0017	24669-33-8*0
Hydrogen fluoride			-321.09	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*820
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			-120.96	± 0.15	kJ/mol	79.90455 ± 0.00100	24959-67-9*800
Methyloxoniumylidene		1062.74	1054.93	± 0.75	kJ/mol	31.03337 ± 0.00088	58157-09-8*0
Hydroxymethylene		131.10	127.35	± 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
Isoformyl		217.26	217.64	± 0.69	kJ/mol	29.01804 ± 0.00086	71080-92-7*0
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		280.26	269.43	± 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
Iodide			-56.826	± 0.090	kJ/mol	126.905019 ± 0.000030	20461-54-5*800
Propargylium		1193.44	1190.63	± 0.38	kJ/mol	39.0554 ± 0.0024	21540-27-2*0
Cycloprop-1-enyl		527.52	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		52.35	27.82	± 0.41	kJ/mol	56.1063 ± 0.0032	287-23-0*0
Cyclopentene		59.36	35.09	± 0.46	kJ/mol	68.1170 ± 0.0040	142-29-0*0
n-Heptane		-145.66	-187.53	± 0.48	kJ/mol	100.2019 ± 0.0057	142-82-5*0
n-Octane		-161.42	-208.25	± 0.67	kJ/mol	114.2285 ± 0.0065	111-65-9*0
1-Hydroxyethylium		610.9	596.4	± 1.3	kJ/mol	45.0600 ± 0.0017	18682-96-7*2
Ethenol		-108.23	-119.03	± 0.77	kJ/mol	44.0526 ± 0.0017	557-75-5*2
Vinyl alcohol cation		778.8	767.6	± 1.4	kJ/mol	44.0520 ± 0.0017	57239-63-1*2
Oxiranyl		172.5	164.2	± 1.4	kJ/mol	43.0446 ± 0.0016	31586-84-2*0
Oxiranylium		901.1	893.1	± 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
Formic acid cation		721.87	714.79	± 0.26	kJ/mol	46.0248 ± 0.0010	50614-05-6*1
Formyloxidanyl		-122.01	-125.36	± 0.56	kJ/mol	45.0174 ± 0.0010	16499-21-1*2
1-Propanol		-231.42	-255.27	± 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		-136.3	-144.5	± 1.4	kJ/mol	59.0440 ± 0.0017	3122-12-1*2
Carboxymethyl		-206.7	-216.0	± 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
Hydrogen difluoride		-198.5	-198.4	± 1.2	kJ/mol	39.004746 ± 0.000070	12528-21-1*1
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			-12.18	± 0.20	kJ/mol	141.93899 ± 0.00083	74-88-4*590
Fluoride			-334.49	± 0.16	kJ/mol	18.99895178 ± 0.00000050	16984-48-8*800
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		2.85	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	49.16	± 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
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		-72.82	-118.31	± 0.53	kJ/mol	98.1861 ± 0.0057	291-64-5*0
Phenoxy		71.10	55.82	± 0.88	kJ/mol	93.1033 ± 0.0048	2122-46-5*0
Benzoyl fluoride		-288.2	-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	159.8	± 1.2	kJ/mol	54.0474 ± 0.0024	2961-80-0*0
Chlorine difluoride cation		998.8	996.6	± 1.7	kJ/mol	73.44896 ± 0.00090	32629-46-2*0
Dioxyamidogen		240.4	233.8	± 1.8	kJ/mol	47.01348 ± 0.00061	71843-95-3*2
Hydrogen difluoride cation		1174.3	1171.3	± 1.5	kJ/mol	39.004198 ± 0.000070	126950-54-70
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
Methylidyne		592.825	596.159	± 0.099	kJ/mol	13.01864 ± 0.00080	3315-37-5*1
Oxofluoronium		1342.64	1342.59	± 0.81	kJ/mol	34.99725 ± 0.00030	12763-67-6*0
Hydrogen fluoride			-321.12	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*821
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
2-Hydrotrioxy cation		1297.9	1291.3	± 1.5	kJ/mol	49.00559 ± 0.00090	74241-49-90
(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
Chlorine chlorite		168.6	166.2	± 1.3	kJ/mol	102.9042 ± 0.0019	105206-44-8*3
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		152.48	144.16	± 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
Propan-1-yl-3-ylidene		554.3	545.6	± 1.4	kJ/mol	41.0718 ± 0.0024	50457-59-52
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		540.00	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
2-Hydrotrioxy anion		27.5	21.8	± 1.4	kJ/mol	49.00669 ± 0.00090	89965-38-80
Chlorosyl hydride		141.9	139.1	± 1.7	kJ/mol	52.46004 ± 0.00095	71572-35-5*0
t-Butylium		733.86	710.58	± 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
Aquachlorine cation		821.8	815.0	± 1.7	kJ/mol	53.46743 ± 0.00096	142599-65-3*0
iso-Butyl		97.17	73.18	± 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		176.99	159.95	± 0.93	kJ/mol	54.0904 ± 0.0032	822-35-5*0
Dihydrogen fluoride anion		133.2	131.9	± 1.6	kJ/mol	21.01483 ± 0.00014	117339-92-1*1
Triiodide			-51.25	± 0.80	kJ/mol	380.713959 ± 0.000090	14900-04-0*800
Ethanol		-269.72	-277.48	± 0.23	kJ/mol	46.0684 ± 0.0017	64-17-5*500
2-Hydroxyethyl		-5.1	-17.5	± 1.3	kJ/mol	45.0605 ± 0.0017	4422-54-2*3
Vinyl alcohol cation		787.10	775.88	± 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		1020.0	1013.0	± 1.5	kJ/mol	43.0441 ± 0.0016	35731-40-91
Vinoxide		-153.39	-160.44	± 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
Acetic acid			-485.19	± 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		1132.47	1125.53	± 0.66	kJ/mol	30.02881 ± 0.00020	59952-06-6*0
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
Perchloric acid		13.2	1.8	± 1.8	kJ/mol	100.4582 ± 0.0015	7601-90-3*0
Formyloxoniumylidene		1017.1	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		-249.52	-273.62	± 0.38	kJ/mol	60.0950 ± 0.0025	67-63-0*0
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
Trioxidaniumyl		925.4	916.2	± 1.5	kJ/mol	50.01353 ± 0.00091	161321-37-5*2
Propionic acid		-436.42	-454.32	± 0.60	kJ/mol	74.0785 ± 0.0025	79-09-4*1
2-Methoxy-2-oxoethyl		-203.4	-218.6	± 1.6	kJ/mol	73.0706 ± 0.0025	54668-31-4*1
(Acetyloxy)methyl		-200.8	-214.5	± 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
Bifluoride		-68.0	-67.6	± 1.6	kJ/mol	39.005295 ± 0.000070	18130-74-01
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		20.5	4.9	± 1.5	kJ/mol	242.7241 ± 0.0028	594-18-3*0
Chlorine fluoride cation		1165.52	1165.70	± 0.49	kJ/mol	54.45055 ± 0.00090	12432-44-9*0
Difluorobromomethane		-410.66	-423.86	± 0.48	kJ/mol	130.9194 ± 0.0013	1511-62-2*0
1,2-Difluoroethane		-434.54	-447.96	± 0.82	kJ/mol	66.0500 ± 0.0016	624-72-6*0
Hydroxyaminiumyl		1161.2	1158.3	± 1.4	kJ/mol	31.01353 ± 0.00032	63559-88-6*0
Fluoro(fluorooxy)methylene		-37.5	-39.1	± 1.4	kJ/mol	66.00691 ± 0.00085	479587-30-9*1
Fluorohydrochlorine cation		975.3	972.3	± 2.0	kJ/mol	55.45849 ± 0.00090	70110-64-4*0
Peroxychlorous acid		96.2	90.2	± 2.1	kJ/mol	84.4588 ± 0.0013	177778-92-6*1
Phenylium		1251.1	1238.0	± 1.9	kJ/mol	77.1034 ± 0.0048	17333-73-2*1
Nitrosodioxaziridine		413.6	407.6	± 1.8	kJ/mol	76.01168 ± 0.00091	132871-99-9*1
Chlorobenzene cation		942.47	928.55	± 0.61	kJ/mol	112.5561 ± 0.0049	55450-32-3*0
Chlorobenzene			11.22	± 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
Hydroxyamidogen		123.5	116.9	± 1.7	kJ/mol	32.02202 ± 0.00034	13940-32-4*2
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
Methyl nitrite		-55.62	-66.29	± 0.45	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
Dinitrogen tetraoxide		20.15	10.86	± 0.14	kJ/mol	92.0111 ± 0.0012	10544-72-6*0
Hydroxyaminylium		1019.6	1012.4	± 2.5	kJ/mol	32.02147 ± 0.00034	66097-71-0*1
Chloride			-166.991	± 0.023	kJ/mol	35.45325 ± 0.00090	16887-00-6*800
Hydroxyimidogen		218.00	215.12	± 0.89	kJ/mol	31.01408 ± 0.00032	35337-59-8*0
Ethylene cation		1075.20	1067.98	± 0.12	kJ/mol	28.0526 ± 0.0016	34470-02-5*0
Nitrous acid		-71.39	-77.74	± 0.26	kJ/mol	47.01348 ± 0.00061	7782-77-6*2
Trihydrogen dioxide anion		-487.5	-495.8	± 1.1	kJ/mol	35.02317 ± 0.00064	12501-19-8*0
Iminomethyl anion		237.4	233.5	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*1
Fluoronium		1490.1	1491.5	± 1.9	kJ/mol	21.01373 ± 0.00014	12206-67-6*1
Cyanogen iodide anion		86.5	88.8	± 8.1	kJ/mol	152.92246 ± 0.00080	1356929-44-6*0
Methanol		-235.25	-238.59	± 0.15	kJ/mol	32.04186 ± 0.00090	67-56-1*500
Azanylium		1266.56	1264.49	± 0.11	kJ/mol	16.02207 ± 0.00016	15194-15-7*0
Formaldehyde cation		944.863	941.242	± 0.099	kJ/mol	30.02543 ± 0.00087	54288-05-0*0
Isoformyl anion		267.4	268.0	± 1.6	kJ/mol	29.01859 ± 0.00086	81747-63-9*2
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
Ammonium nitrate		-350.29	-365.26	± 0.18	kJ/mol	80.04344 ± 0.00095	6484-52-2*500
1-Propynyl		528.16	525.98	± 0.84	kJ/mol	39.0559 ± 0.0024	89342-91-6*0
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	1380.9	± 1.1	kJ/mol	38.0474 ± 0.0024	85398-75-0*0
Propynylidene		597.6	599.3	± 1.3	kJ/mol	38.0480 ± 0.0024	67152-18-5*3
Propenediylidene		796.2	797.3	± 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
Dibromide		-199.2	-213.3	± 2.0	kJ/mol	159.8085 ± 0.0020	12595-70-9*0
Dihydrogen fluoride anion		-257.0	-260.1	± 1.9	kJ/mol	21.01483 ± 0.00014	117339-92-12
Oxochloronium		1150.86	1150.69	± 0.66	kJ/mol	51.45155 ± 0.00095	12301-79-0*0
iso-Hexane		-134.66	-173.92	± 0.84	kJ/mol	86.1754 ± 0.0049	107-83-5*0
Azidonitrene		692.1	687.5	± 1.4	kJ/mol	56.02696 ± 0.00028	147363-92-6*2
Ethyloxoniumyl		783.3	766.3	± 1.7	kJ/mol	46.0679 ± 0.0017	34480-55-2*0
1-Hydroxyethylium		608.78	594.35	± 0.40	kJ/mol	45.0600 ± 0.0017	18682-96-7*0
Chlorosyl chloride		134.5	133.2	± 1.4	kJ/mol	86.9048 ± 0.0018	86825-56-1*0
2-Hydroxyethylium		1019.2	1006.4	± 1.6	kJ/mol	45.0600 ± 0.0017	38607-31-7*3
Ethyloxoniumylidene		988.8	975.1	± 1.5	kJ/mol	45.0600 ± 0.0017	54387-07-4*0
Acetaldehyde cation		831.83	821.85	± 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		-45.34	-48.46	± 0.12	kJ/mol	42.0367 ± 0.0016	463-51-4*2
Ketenyl anion		-48.38	-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	444.72	± 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
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
Nitronium		961.78	958.23	± 0.20	kJ/mol	46.00499 ± 0.00060	14522-82-8*0
Oxoethylidene		266.0	262.7	± 1.9	kJ/mol	42.0367 ± 0.0016	39920-84-8*11
Chlorite		-105.62	-107.79	± 0.35	kJ/mol	67.4520 ± 0.0011	14998-27-7*0
Formic acid cation		723.7	716.7	± 1.2	kJ/mol	46.0248 ± 0.0010	50614-05-6*2
Formic acid anion		-256.2	-262.4	± 1.8	kJ/mol	46.0259 ± 0.0010	19066-82-1*1
Fluorosyl fluoride		192.6	193.1	± 2.3	kJ/mol	53.99621 ± 0.00030	86825-57-2*1
Chlorohydrofluorine cation		1000.8	998.1	± 2.1	kJ/mol	55.45849 ± 0.00090	70110-63-3*0
Isocyanic acid cation		1003.10	1000.43	± 0.51	kJ/mol	43.02423 ± 0.00086	444010-28-0*0
Peroxyimidogen		405.4	403.4	± 1.9	kJ/mol	46.00554 ± 0.00060	60488-31-50
Fulminic acid cation		1215.8	1213.0	± 1.3	kJ/mol	43.02423 ± 0.00086	114766-65-3*0
Hydrogen fluoride			-321.05	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*902
Acetic acid			-484.92	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*840
Acetyl chloride			-272.17	± 0.33	kJ/mol	78.4973 ± 0.0019	75-36-5*500
Methyl formate			-388.41	± 0.88	kJ/mol	60.0520 ± 0.0017	107-31-3*500
Ethyl formate		-355.5	-374.6	± 1.5	kJ/mol	74.0785 ± 0.0025	109-94-4*2
Dioxymethylidyne		299.8	301.1	± 1.7	kJ/mol	44.00950 ± 0.00100	791121-04-5*0
Oxadiazirene		351.7	349.9	± 1.7	kJ/mol	44.01288 ± 0.00033	227934-45-4*0
2-Methoxy-2-oxoethyl		-173.3	-188.5	± 1.8	kJ/mol	73.0706 ± 0.0025	54668-31-4*2
(Acetyloxy)methyl		-174.4	-187.5	± 1.7	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			-321.10	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*904
NON		545.5	542.6	± 1.7	kJ/mol	44.01288 ± 0.00033	227934-46-5*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
Tetrachloromethane		-108.74	-128.15	± 0.44	kJ/mol	153.8215 ± 0.0037	56-23-5*500
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		-41.1	-42.8	± 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
Bromo hypobromite		120.3	103.8	± 1.2	kJ/mol	175.8074 ± 0.0020	21308-80-5*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			-163.91	± 0.48	kJ/mol	98.9586 ± 0.0024	75-34-3*500
Diazenide		175.7	176.7	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*100
Pentachloroethane		-151.3	-157.2	± 1.9	kJ/mol	202.2928 ± 0.0048	76-01-7*0
Carbide		504.70	511.27	± 0.39	kJ/mol	24.0219 ± 0.0016	12595-78-7*0
Hydrogen difluoride		-187.4	-187.1	± 1.6	kJ/mol	39.004746 ± 0.000070	12528-21-1*2
Chloroform			-133.80	± 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		-107.4	-131.4	± 1.6	kJ/mol	270.7211 ± 0.0031	353-54-8*0
Tribromochloromethane		77.1	54.2	± 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
Bromochloromethane		-28.7	-42.7	± 1.3	kJ/mol	129.3833 ± 0.0016	74-97-5*0
Diiodide		-178.13	-180.72	± 0.48	kJ/mol	253.809489 ± 0.000060	12190-71-5*0
Dioxygenyl ion monohydrate		828.5	821.4	± 2.1	kJ/mol	50.01353 ± 0.00091	11083-61-7*0
Fluorochlorate		-256.03	-255.43	± 0.81	kJ/mol	54.45165 ± 0.00090	12272-56-9*0
Fluoromethylene		148.38	148.66	± 0.43	kJ/mol	32.01704 ± 0.00080	13453-52-6*0
Peroxychlorite		-34.3	-34.3	± 2.0	kJ/mol	83.4514 ± 0.0013	852472-63-0*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
cis-1,2-Difluoroethene	$F/C=C\F$	-302.98	-309.75	± 0.99	kJ/mol	64.0341 ± 0.0016	1630-77-9*0
1,2-Dibromoacetylene		332.4	321.5	± 2.3	kJ/mol	183.8294 ± 0.0026	624-61-3*0
2-Cyclopropyn-1-ylidene		898.9	905.8	± 1.6	kJ/mol	36.0321 ± 0.0024	102508-15-6*1
Fluoro(fluorooxy)methylene		-97.5	-95.7	± 1.6	kJ/mol	66.00691 ± 0.00085	479587-30-9*101
1-Chloro ozone		226.3	223.1	± 2.3	kJ/mol	83.4509 ± 0.0013	141801-66-3*101
Fluorooxomethylium		724.9	724.5	± 1.2	kJ/mol	47.00795 ± 0.00085	38264-00-5*0
Fluoroisoformyl		-37.8	-32.4	± 1.6	kJ/mol	47.00850 ± 0.00085	1871-24-50
2-Cyclopropyn-1-ylium-1-yl		1944.7	1952.6	± 1.9	kJ/mol	36.0316 ± 0.0024	154702-35-9*0
Benzene cation		992.50	976.03	± 0.23	kJ/mol	78.1113 ± 0.0048	34504-50-2*0
Triiodide		-254.3	-257.5	± 3.4	kJ/mol	380.713959 ± 0.000090	14900-04-0*0
Hydrogen fluoride			-321.15	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*822
2-Oxopropylium		784.4	770.6	± 1.8	kJ/mol	57.0707 ± 0.0024	54088-52-7*0
1,2-Dibromoethane		-11.7	-38.6	± 1.2	kJ/mol	187.8612 ± 0.0026	106-93-4*0
2-Butanone		-216.99	-238.44	± 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
Methyleneoxonium cation		827.7	818.3	± 1.7	kJ/mol	32.04131 ± 0.00090	177788-17-90
Hydroxymethanide		9.4	2.8	± 1.7	kJ/mol	31.03447 ± 0.00088	55830-71-2*0
Formaldehyde		-105.379	-109.218	± 0.098	kJ/mol	30.02598 ± 0.00087	50-00-0*2
Dioxofluorine		524.0	523.2	± 1.1	kJ/mol	50.99720 ± 0.00060	175861-93-5*0
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
Aminyliumyl		1659.04	1659.96	± 0.24	kJ/mol	15.014131 ± 0.000099	19067-62-0*0
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
Hydroxyamidogen anion		90.8	84.9	± 2.8	kJ/mol	32.02257 ± 0.00034	66097-71-00
Chlorine difluoride		22.5	23.8	± 1.9	kJ/mol	73.44951 ± 0.00090	91483-78-2*0
Hydrogen chloride			-166.683	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*841
Ethane cation		1043.19	1029.18	± 0.60	kJ/mol	30.0685 ± 0.0017	34488-65-8*0
Carbonic acid		-602.76	-612.07	± 0.75	kJ/mol	62.0248 ± 0.0012	463-79-6*0
Peroxyformic acid		-265.3	-273.1	± 1.5	kJ/mol	62.0248 ± 0.0012	107-32-4*3
Hydrogen bromide			-120.48	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*834
Fluorodioxidenium		1221.9	1219.5	± 2.0	kJ/mol	50.99665 ± 0.00060	139584-95-5*0
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 bromide			-120.78	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*844
Propynylidene cation		1410.8	1413.4	± 1.3	kJ/mol	38.0474 ± 0.0024	75123-91-0*0
Propynylidene		597.4	599.2	± 1.1	kJ/mol	38.0480 ± 0.0024	67152-18-5*4
Propadienylidenide		381.14	382.04	± 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	-173.30	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*500
Azidonitrene		660.8	657.6	± 1.6	kJ/mol	56.02696 ± 0.00028	147363-92-6*1
Ethylene anion		232.0	224.4	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*1
Dihydrogen fluoride anion		-61.9	-60.5	± 3.2	kJ/mol	21.01483 ± 0.00014	117339-92-1*2
Chlorine difluoride anion		-504.9	-505.8	± 1.9	kJ/mol	73.45005 ± 0.00090	16892-05-0*0
n-Pentane		-156.05	-173.02	± 0.31	kJ/mol	72.1488 ± 0.0041	109-66-0*500
iso-Pentane			-178.44	± 0.43	kJ/mol	72.1488 ± 0.0041	78-78-4*500
neo-Pentane			-189.90	± 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
1,5-Hexadiene		108.38	83.79	± 0.40	kJ/mol	82.1436 ± 0.0049	592-42-7*0
Perchloryloxy		248.6	241.0	± 1.8	kJ/mol	99.4503 ± 0.0015	12133-63-0*0
Hydrogen fluoride			-302.39	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*590
Ethoxy		1.48	-11.94	± 0.48	kJ/mol	45.0605 ± 0.0017	2154-50-9*0
Hydrogen fluoride			-321.02	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*901
Nitrosyl fluoride		-85.81	-88.18	± 0.93	kJ/mol	49.00454 ± 0.00031	7789-25-5*0
Dihydrogen cation		1488.364	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*0
Hydrogen chloride			-165.557	± 0.026	kJ/mol	36.46064 ± 0.00090	7647-01-0*825
Dicarbon monoxide cation		1434.0	1439.1	± 2.2	kJ/mol	40.0203 ± 0.0016	12287-08-0*0
Nitrosyl nitrate		70.6	62.3	± 1.8	kJ/mol	92.0111 ± 0.0012	15969-55-80
Hydrogen fluoride			-320.87	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*815
(E)-Diazene anion		265.5	258.7	± 2.0	kJ/mol	30.02991 ± 0.00020	59952-06-60
C=O-C cation		1813.0	1817.0	± 2.4	kJ/mol	40.0203 ± 0.0016	83483-98-1*2
Azanylium		944.272	937.317	± 0.030	kJ/mol	17.03001 ± 0.00022	19496-55-0*0
Tetraoxidanyl		2.0	0.2	± 3.0	kJ/mol	65.0055 ± 0.0012	69696-93-1*100
Oxirene anion		288.2	285.3	± 2.3	kJ/mol	42.0372 ± 0.0016	157-18-60
Oxoethylidene		261.2	258.4	± 1.6	kJ/mol	42.0367 ± 0.0016	39920-84-8*1
Acetylene anion		356.8	356.7	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*1
Trifluoride ion		-348.9	-349.7	± 2.6	kJ/mol	56.9957582 ± 0.0000015	25730-99-8*0
(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	-247.0	± 1.9	kJ/mol	46.0259 ± 0.0010	19066-82-1*2
Fluorodioxidanide		-256.9	-256.1	± 1.9	kJ/mol	50.99775 ± 0.00060	23553-17-5*0
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
Hydroxyaminylium		1048.6	1041.4	± 2.6	kJ/mol	32.02147 ± 0.00034	66097-71-0*2
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
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
Peroxyimidogen cation		1409.6	1406.8	± 1.9	kJ/mol	46.00499 ± 0.00060	60488-32-60
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
Peroxyimidogen anion		165.1	162.7	± 1.7	kJ/mol	46.00609 ± 0.00060	60488-31-5*0
Dihydrogen fluoride		-55.9	-54.9	± 1.6	kJ/mol	21.01428 ± 0.00014	12592-22-2*1
Acetic acid		-484.10	-483.68	± 0.18	kJ/mol	60.0520 ± 0.0017	64-19-7*500
Acetic acid			-484.71	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*825
Acetic acid			-484.90	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*835
Deuterium atom cation		1532.210	1534.123	± 0.000	kJ/mol	2.01355319809 ± 0.00000000040	14464-47-2*0
1-Hydrazinylium-1-yl		1143.4	1136.4	± 1.4	kJ/mol	30.02881 ± 0.00020	63986-30-1*0
Hydrogen fluoride			-321.17	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*823
Nirous oxide cation		1329.67	1326.78	± 0.12	kJ/mol	44.01233 ± 0.00033	12269-46-4*0
Oxadiazirine anion		95.1	95.5	± 2.9	kJ/mol	44.01343 ± 0.00033	350586-31-1*0
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
Methylimidogen		323.1	315.4	± 1.7	kJ/mol	29.04126 ± 0.00083	27770-42-9*0
Fluoroniumyl ion		1275.558	1275.790	± 0.050	kJ/mol	20.005795 ± 0.000070	12381-92-9*0
Dichloromethylene		313.62	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		203.44	204.25	± 0.94	kJ/mol	48.4719 ± 0.0012	75466-08-9*0
Trioxodinitrate anion		-104.3	-107.5	± 1.9	kJ/mol	76.01223 ± 0.00091	194856-62-7*100
Chlorohydroxymethyl		-46.2	-51.8	± 2.0	kJ/mol	65.4787 ± 0.0012	147139-06-8*2
Hydrofluorate ion		-75.6	-75.1	± 1.8	kJ/mol	20.006892 ± 0.000070	37249-79-9*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
Ethynylene cation		1965.19	1971.78	± 0.50	kJ/mol	24.0209 ± 0.0016	12595-79-8*0
Hexachloroethane			-216.5	± 2.8	kJ/mol	236.7376 ± 0.0056	67-72-1*500
Diazenide		347.5	344.6	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*1
Trioxidanyl		26.30	23.02	± 0.19	kJ/mol	49.00614 ± 0.00090	12500-78-6*2
trans-1,2-Dichloroethene	$C(\Cl)=C/Cl$	5.28	-0.14	± 0.54	kJ/mol	96.9427 ± 0.0024	156-60-5*0
Trioxidaniumyl		935.2	926.1	± 1.6	kJ/mol	50.01353 ± 0.00091	161321-37-5*3
Iminomethyl anion		252.6	248.9	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*2
Nitrous acid		-73.005	-78.662	± 0.079	kJ/mol	47.01348 ± 0.00061	7782-77-6*0
Hydrogen cyanide cation		1442.52	1442.05	± 0.20	kJ/mol	27.02483 ± 0.00081	12601-62-6*0
Fluorochlorobromomethane		-219.3	-231.7	± 5.5	kJ/mol	147.3737 ± 0.0016	593-98-6*0
Hydroxylamine		-15.5	-26.0	± 1.4	kJ/mol	33.02996 ± 0.00037	7803-49-8*2
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
Chlorine oxide peroxide		226.5	227.4	± 2.5	kJ/mol	83.4509 ± 0.0013	141801-67-4*100
Hydroxylamine cation		857.6	847.8	± 1.6	kJ/mol	33.02941 ± 0.00037	62675-55-2*0
Polytetrafluoroethylene			-829.56	± 0.58	kJ/mol	100.0150 ± 0.0016	9002-84-0*591
Bifluoride		-705.22	-709.07	± 0.36	kJ/mol	39.005295 ± 0.000070	18130-74-0*0
trans-1,2-Difluoroethene		-299.75	-306.18	± 0.98	kJ/mol	64.0341 ± 0.0016	1630-78-0*0
Formyl fluoride cation		816.6	813.3	± 1.3	kJ/mol	48.01589 ± 0.00086	99766-68-4*0
Formyl fluoride		-405.1	-403.7	± 1.6	kJ/mol	47.00905 ± 0.00085	62227-71-8*0
Fluoroisoformyl cation		1347.4	1349.5	± 1.9	kJ/mol	47.00795 ± 0.00085	1871-25-60
Hydrogen peroxide cation		931.41	924.55	± 0.94	kJ/mol	34.01413 ± 0.00062	12325-10-9*2
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
Aminooxy cation		946.05	938.92	± 0.80	kJ/mol	32.02147 ± 0.00034	51375-41-80
p-Benzyne		603.5	594.1	± 1.2	kJ/mol	76.0960 ± 0.0048	3355-34-8*1
1-Chloro ozone anion		-108.9	-111.4	± 2.2	kJ/mol	83.4514 ± 0.0013	224299-15-4*3
Benzylium		929.34	909.84	± 0.61	kJ/mol	91.1299 ± 0.0056	6711-19-9*0
1,3-Cycloheptadiene		123.24	94.13	± 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
Trioxidanylium		1085.3	1079.1	± 1.5	kJ/mol	49.00559 ± 0.00090	74241-49-9*2
Fluorosyl fluoride anion		-147.2	-146.9	± 3.0	kJ/mol	53.99675 ± 0.00030	86825-57-22
1,3-Butadiyne-1,4-diyl		1052.47	1062.45	± 0.68	kJ/mol	48.0428 ± 0.0032	78015-07-3*0
Acetone enol		-147.2	-164.4	± 1.3	kJ/mol	58.0791 ± 0.0025	29456-04-0*2
Perchlorate		-263.2	-272.1	± 2.2	kJ/mol	99.4508 ± 0.0015	14797-73-0*0
1-Chloro ozone anion		-66.8	-68.7	± 2.1	kJ/mol	83.4514 ± 0.0013	224299-15-4*1
cis-1,2-Dibromoethene	$C(\Br)=C\Br$	120.9	100.4	± 2.1	kJ/mol	185.8453 ± 0.0026	590-11-4*0
Cyanomethanide		114.1	111.2	± 1.1	kJ/mol	40.0446 ± 0.0016	21438-99-3*0
1,1-Dibromoethane		-5.4	-32.4	± 1.8	kJ/mol	187.8612 ± 0.0026	557-91-5*0
Krypton hydride cation		1106.33	1104.55	± 0.69	kJ/mol	84.8074 ± 0.1000	37276-90-7*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
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
Hypochlorous acid anion		198.7	198.4	± 2.5	kJ/mol	52.46059 ± 0.00095	34524-94-2*0
Tribromine		155.9	134.2	± 3.2	kJ/mol	239.7120 ± 0.0030	11094-39-6*0
Propynylidene		543.41	546.40	± 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
Methanol anion		-89.1	-99.8	± 2.8	kJ/mol	32.04241 ± 0.00090	68474-04-4*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
Bromine atom		117.914	111.851	± 0.056	kJ/mol	79.90400 ± 0.00100	10097-32-2*1
Nitrate			-206.64	± 0.18	kJ/mol	62.00549 ± 0.00090	14797-55-8*800
Ethylene anion		231.6	225.5	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*2
Trifluorine cation		1529.5	1527.4	± 2.3	kJ/mol	56.9946610 ± 0.0000015	64710-22-1*0
Tribromide		-287.4	-308.4	± 1.9	kJ/mol	239.7125 ± 0.0030	14522-80-6*0
Cyclopentene			4.38	± 0.42	kJ/mol	68.1170 ± 0.0040	142-29-0*590
n-Hexane		-179.98	-198.64	± 0.34	kJ/mol	86.1754 ± 0.0049	110-54-3*500
Chlorine difluoride anion		-319.0	-319.1	± 2.2	kJ/mol	73.45005 ± 0.00090	91419-41-9*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
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
Chlorosyl chloride cation		1132.6	1130.8	± 2.0	kJ/mol	86.9043 ± 0.0018	86825-56-10
Formaldehyde anion		-26.7	-28.3	± 2.0	kJ/mol	30.02653 ± 0.00087	27837-46-3*0
Hydrogen fluoride			-321.16	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*891
Hydroxyimidogen anion		229.9	227.4	± 2.3	kJ/mol	31.01463 ± 0.00032	35337-59-80
Chlorosyl chloride anion		-185.4	-184.7	± 2.3	kJ/mol	86.9053 ± 0.0018	86825-55-00
Acetaldehyde anion		-62.0	-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
Formaldehyde		196.011	192.681	± 0.098	kJ/mol	30.02598 ± 0.00087	50-00-0*1
Ketene cation		882.23	879.06	± 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
Chloryl ion		1100.15	1097.49	± 0.52	kJ/mol	67.4510 ± 0.0011	25052-55-5*0
Oxoethenylium		1139.7	1142.5	± 2.2	kJ/mol	41.0282 ± 0.0016	92056-63-8*0
Hydrogen bromide			-120.68	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*841
Hydroperoxyimidogen		103.3	99.8	± 2.4	kJ/mol	47.01348 ± 0.00061	877456-58-1*1
Dioxygen		-0.000	-0.000	± 0.000	kJ/mol	31.99880 ± 0.00060	7782-44-7*1
Tetranitrogen cation		1392.8	1392.5	± 1.5	kJ/mol	56.02641 ± 0.00028	12185-04-5*0
Oxiranylidene		456.2	452.1	± 2.2	kJ/mol	42.0367 ± 0.0016	50983-85-2*1
Oxiranylidene cation		1165.4	1161.9	± 2.5	kJ/mol	42.0361 ± 0.0016	50983-85-20
Oxiranylidene anion		236.4	232.4	± 2.3	kJ/mol	42.0372 ± 0.0016	50983-86-30
Hydrogen chloride			-166.712	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*951
Methyl hydroperoxide cation		833.4	820.2	± 2.2	kJ/mol	48.0407 ± 0.0010	112465-88-0*0
Methoxyoxoniumylidene		1012.8	1004.6	± 2.0	kJ/mol	47.0328 ± 0.0010	86475-50-5*0
Acetylene anion		380.1	380.3	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*2
Trioxidanylium		1070.6	1064.3	± 1.4	kJ/mol	49.00559 ± 0.00090	74241-49-9*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
Hydrogen difluoride cation		1174.3	1171.3	± 1.5	kJ/mol	39.004198 ± 0.000070	126950-54-72
Hydrogen chloride			-165.946	± 0.026	kJ/mol	36.46064 ± 0.00090	7647-01-0*907
Carbon atom		711.399	716.885	± 0.047	kJ/mol	12.01070 ± 0.00080	7440-44-0*1
Carbon atom		833.330	838.477	± 0.047	kJ/mol	12.01070 ± 0.00080	7440-44-0*2
Deuterium hydride cation		1490.498	1490.587	± 0.000	kJ/mol	3.021493 ± 0.000070	12181-16-7*0
Imidogen anion		322.63	322.68	± 0.17	kJ/mol	15.015229 ± 0.000099	23841-33-0*0
H-CO2 vdW complex		-178.3	-177.5	± 2.1	kJ/mol	45.0174 ± 0.0010	2564-83-2100
2-Chloro ozone anion		-103.4	-105.6	± 3.2	kJ/mol	83.4514 ± 0.0013	141801-67-40
2-Propanol		-306.25	-319.06	± 0.38	kJ/mol	60.0950 ± 0.0025	67-63-0*500
1-Propanol		-290.54	-302.72	± 0.24	kJ/mol	60.0950 ± 0.0025	71-23-8*500
Ammonium radical		190.01	179.43	± 0.43	kJ/mol	18.03850 ± 0.00029	92075-50-8*0
Methylammoniumyl		865.42	851.48	± 0.33	kJ/mol	31.05659 ± 0.00088	34516-31-9*0
Methylamine anion		83.9	69.0	± 2.8	kJ/mol	31.05769 ± 0.00088	81096-79-9*0
Hydrooxonitrate		78.60	75.68	± 0.99	kJ/mol	31.01463 ± 0.00032	66057-02-1*0
Cyanogen bromide anion		57.9	54.2	± 3.8	kJ/mol	105.9220 ± 0.0013	54092-05-6*0
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
1-Methoxyethenol		-284.7	-304.1	± 1.7	kJ/mol	74.0785 ± 0.0025	4453-91-2*1
Chloroniumyl ion		1137.797	1137.731	± 0.0051	kJ/mol	36.46009 ± 0.00090	12258-94-5*0
Oxobromonium		1139.3	1131.5	± 1.5	kJ/mol	95.9029 ± 0.0010	142315-39-7*0
Peroxychloric acid		77.5	69.3	± 2.6	kJ/mol	100.4582 ± 0.0015	177778-91-5*0
Aminomethyl anion		209.3	199.0	± 2.1	kJ/mol	30.04975 ± 0.00085	74215-21-7*0
Chloryl chloride		126.1	122.1	± 1.7	kJ/mol	102.9042 ± 0.0019	117489-73-3*0
Ethyl formate			-425.8	± 1.2	kJ/mol	74.0785 ± 0.0025	109-94-4*500
Nirous oxide anion		99.2	96.7	± 1.9	kJ/mol	44.01343 ± 0.00033	12274-12-3*0
Bromine dioxide		167.1	157.5	± 3.0	kJ/mol	111.9028 ± 0.0012	21255-83-4*0
Hydrogen fluoride			-321.05	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*903
Methylaminilium		1134.8	1125.0	± 2.1	kJ/mol	30.04865 ± 0.00085	49784-84-1*0
Chlorine difluoride cation		1346.3	1344.9	± 2.1	kJ/mol	73.44896 ± 0.00090	86825-59-4*0
Methanimine cation		1056.0	1049.1	± 1.8	kJ/mol	29.04071 ± 0.00083	65130-65-6*0
Propionic acid		-415.9	-433.4	± 1.4	kJ/mol	74.0785 ± 0.0025	79-09-4*2
Hydrogen chloride			-165.979	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*829
Methanimine anion		224.3	217.1	± 2.2	kJ/mol	29.04181 ± 0.00083	127593-73-1*0
Oxalic acid		-710.8	-721.4	± 2.1	kJ/mol	90.0349 ± 0.0020	144-62-7*0
Aminomethyliumyl		1039.5	1031.8	± 2.3	kJ/mol	29.04071 ± 0.00083	89302-94-3*0
Hydrogen chloride			-166.637	± 0.025	kJ/mol	36.46064 ± 0.00090	7647-01-0*840
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	661.3	± 1.8	kJ/mol	52.0349 ± 0.0016	130760-10-0*0
Aminomethylene anion		353.0	346.1	± 2.3	kJ/mol	29.04181 ± 0.00083	207914-86-1*0
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
Cyanomethyliumylidene		1719.4	1724.8	± 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
Fluorosyl fluoride anion		-56.6	-55.7	± 2.4	kJ/mol	53.99675 ± 0.00030	86825-57-21
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
Trichloromethylium		854.29	852.77	± 0.93	kJ/mol	118.3683 ± 0.0028	27130-34-3*0
Nitric acid cation		1029.13	1020.07	± 0.69	kJ/mol	63.01233 ± 0.00091	272109-63-4*0
Dichloromethyliumyl		1121.6	1122.6	± 1.8	kJ/mol	82.9156 ± 0.0020	55945-51-2*0
Methylimidogen anion		321.1	313.5	± 1.8	kJ/mol	29.04181 ± 0.00083	82539-34-2*0
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
Fluorosyl fluoride cation		1413.0	1413.4	± 3.5	kJ/mol	53.99566 ± 0.00030	86825-50-51
Hydrogen chloride			-165.546	± 0.027	kJ/mol	36.46064 ± 0.00090	7647-01-0*953
Nitrosyl nitrate		48.3	40.3	± 1.8	kJ/mol	92.0111 ± 0.0012	15969-55-8*1
iso-Proplylide		128.6	110.2	± 1.6	kJ/mol	43.0882 ± 0.0024	25012-80-0*0
Dibromine			-2.16	± 0.20	kJ/mol	159.8080 ± 0.0020	7726-95-6*800
Hydrogen fluoride			-321.05	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*888
Hypobromous acid cation		974.89	964.27	± 0.53	kJ/mol	96.9108 ± 0.0010	154804-02-1*0
Fluorine atom cation		1758.303	1760.601	± 0.048	kJ/mol	18.99785462 ± 0.00000050	14701-13-4*0
Chloromethane cation		1014.67	1007.90	± 0.20	kJ/mol	50.4867 ± 0.0012	12538-71-5*0
Aminomethyliumylidene		1168.3	1165.1	± 2.2	kJ/mol	28.03277 ± 0.00082	86784-42-1*0
Bromofluoromethane		-198.0	-212.4	± 5.5	kJ/mol	112.9290 ± 0.0013	373-52-4*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
Fluorodibromomethane		-160.0	-179.5	± 5.5	kJ/mol	191.8250 ± 0.0022	1868-53-7*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
Water			-285.832	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*589
1,2-Difluoroacetylene cation		1081.7	1084.5	± 1.3	kJ/mol	62.0177 ± 0.0016	268566-70-7*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
Hydroxyoxoammoniumyl		984.1	977.7	± 1.8	kJ/mol	47.01293 ± 0.00061	80371-48-8*0
Hydrogen bromide			-120.71	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*952
Ammonium chloride		-311.556	-314.718	± 0.063	kJ/mol	53.49120 ± 0.00095	12125-02-9*510
Chloro(chlorooxy)methylene		73.5	73.7	± 3.6	kJ/mol	98.9155 ± 0.0020	479587-31-0*2
Chlorohydroxymethylene		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
Dioxodiazoxane		109.3	105.2	± 1.8	kJ/mol	76.01168 ± 0.00091	122413-35-8*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-Cyclopropyn-1-ylidene		993.2	1000.1	± 2.5	kJ/mol	36.0321 ± 0.0024	102508-15-6*2
2-Bromoethanol			-274.87	± 0.47	kJ/mol	124.9645 ± 0.0019	540-51-2*590
Hypofluorous acid cation		1142.00	1138.99	± 0.87	kJ/mol	36.00519 ± 0.00031	90243-22-4*0
Phenylium		1148.46	1135.68	± 0.87	kJ/mol	77.1034 ± 0.0048	17333-73-2*2
2-Cyclopropyn-1-yl anion		664.8	672.1	± 1.6	kJ/mol	36.0326 ± 0.0024	500574-36-7*0
Ammonium bromide		-253.72	-270.30	± 0.16	kJ/mol	97.9425 ± 0.0010	12124-97-9*510
m-Benzyne anion		444.1	435.2	± 1.3	kJ/mol	76.0965 ± 0.0048	249589-31-9*0
Cyclopropylide		264.7	251.9	± 1.8	kJ/mol	41.0723 ± 0.0024	1724-45-4*0
p-Benzyne anion		465.0	455.5	± 1.3	kJ/mol	76.0965 ± 0.0048	219298-17-6*0
Triazirinylium ion		1608.8	1605.9	± 1.6	kJ/mol	42.01967 ± 0.00021	92220-05-8*0
Hydrogen fluoride			-321.16	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*905
Aminooxy anion		47.5	40.5	± 1.7	kJ/mol	32.02257 ± 0.00034	51375-41-8*0
Cycloheptane		-126.94	-156.84	± 0.51	kJ/mol	98.1861 ± 0.0057	291-64-5*500
Dinitrogen pentoxide			-41.04	± 0.42	kJ/mol	108.0105 ± 0.0015	10102-03-1*500
Ethanium		888.7	870.3	± 1.8	kJ/mol	31.0764 ± 0.0017	24669-33-8*2
Ethylbenzene			-12.55	± 0.55	kJ/mol	106.1650 ± 0.0064	100-41-4*500
Isocyanomethane		183.79	177.31	± 0.82	kJ/mol	41.0520 ± 0.0016	593-75-9*0
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
Phenyloxoniumylidene		901.6	887.2	± 2.2	kJ/mol	93.1028 ± 0.0048	41071-17-4*0
Anisole		-47.79	-72.63	± 0.80	kJ/mol	108.1378 ± 0.0056	100-66-3*0
Hypochlorous acid cation		998.91	995.87	± 0.90	kJ/mol	52.45949 ± 0.00095	71606-47-8*0
Hydrogen bromide			-120.73	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*842
Fluorobenzene		-151.80	-149.38	± 0.89	kJ/mol	96.1023 ± 0.0048	462-06-6*500
Bicyclo[1.1.0]buta-1,3-diene-2,4-diyl		1047.48	1055.07	± 0.73	kJ/mol	48.0428 ± 0.0032	12184-80-4*0
Bromobenzene			59.9	± 1.3	kJ/mol	157.0079 ± 0.0049	108-86-1*500
Hydrogen fluoride			-321.11	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*890
Acetone		-245.16	-248.28	± 0.38	kJ/mol	58.0791 ± 0.0025	67-64-1*500
Ethanium		895.1	877.3	± 1.9	kJ/mol	31.0764 ± 0.0017	24669-33-8*3
Propionaldehyde		-218.19	-216.73	± 0.29	kJ/mol	58.0791 ± 0.0025	123-38-6*500
Triazirine		464.0	457.6	± 2.6	kJ/mol	43.02816 ± 0.00022	157-29-9*0
trans-1,2-Dibromoethene	$C(\Br)=C/Br$	121.2	101.4	± 2.1	kJ/mol	185.8453 ± 0.0026	590-12-5*0
1,1-Dibromoethene		125.1	104.7	± 2.2	kJ/mol	185.8453 ± 0.0026	593-92-0*0
Norbornadiene		263.2	237.8	± 1.9	kJ/mol	92.1384 ± 0.0056	121-46-0*0
Monoammonium succinate			-1067.98	± 0.72	kJ/mol	135.1186 ± 0.0035	38457-08-8*510
Diammonium succinate			-1182.52	± 0.48	kJ/mol	152.1492 ± 0.0035	2226-88-2*510
Hypofluorous acid anion		155.3	154.7	± 2.6	kJ/mol	36.00629 ± 0.00031	36505-07-4*2
Acrolein		-46.6	-56.9	± 1.4	kJ/mol	56.0633 ± 0.0024	107-02-8*2
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 trihydrate		-1062.11	-1055.26	± 0.21	kJ/mol	117.0587 ± 0.0019	13444-83-2*500
1-Ethenylium-1-yl		1507.1	1507.1	± 2.1	kJ/mol	26.0367 ± 0.0016	80541-07-7*0
Isocyanogen chloride		314.5	316.1	± 2.4	kJ/mol	61.4701 ± 0.0012	75754-69-7*0
Formic acid		-431.55	-424.72	± 0.20	kJ/mol	46.0254 ± 0.0010	64-18-6*500
Nitric acid monohydrate		-479.18	-472.68	± 0.19	kJ/mol	81.0282 ± 0.0012	13444-82-1*500
Dihydrogen fluoride		-56.5	-54.2	± 1.7	kJ/mol	21.01428 ± 0.00014	12592-22-2*2
(Z)-Diazene anion	$[H]/N=[N-]\[H]$	280.0	273.3	± 2.0	kJ/mol	30.02991 ± 0.00020	86631-37-00
Formyloxidanyl		-125.82	-127.19	± 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
Dihydrogen		1.417	0.019	± 0.000	kJ/mol	2.01588 ± 0.00014	1333-74-0*1
Chlorine chlorite		177.4	175.0	± 2.2	kJ/mol	102.9042 ± 0.0019	105206-44-8*2
Hydraziniumyl		886.6	873.2	± 2.0	kJ/mol	32.04469 ± 0.00031	20771-51-1*0
Cyclobutane			3.92	± 0.41	kJ/mol	56.1063 ± 0.0032	287-23-0*590
Oxygen atom hexacation		42035.28	42037.14	± 0.12	kJ/mol	15.99611 ± 0.00030	14158-22-6*0
Ethoxyethane		-265.22	-277.54	± 0.80	kJ/mol	74.1216 ± 0.0033	60-29-7*500
Peroxyhypochlorous acid anion		-32.2	-34.0	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-32
Peroxynitrous acid		-5.81	-11.64	± 0.36	kJ/mol	63.01288 ± 0.00091	14691-52-2*0
Methylcyclopropane			1.83	± 0.59	kJ/mol	56.1063 ± 0.0032	594-11-6*590
Tetraoxidanyl		53.0	46.0	± 5.1	kJ/mol	65.0055 ± 0.0012	69696-93-1*2
Cyclopropenylidene anion		544.2	543.8	± 2.2	kJ/mol	38.0485 ± 0.0024	16165-40-50
Methanol dimer		-398.4	-419.1	± 1.4	kJ/mol	64.0837 ± 0.0018	42845-44-3*0
Methylamine			-46.99	± 0.35	kJ/mol	31.05714 ± 0.00088	74-89-5*500
Carbon dioxide anion		-340.6	-340.1	± 2.2	kJ/mol	44.01005 ± 0.00100	14485-07-5*0
Dioxiranylidene cation		1409.1	1410.3	± 2.6	kJ/mol	44.00895 ± 0.00100	138832-57-20
Hydrogen difluoride cation		1267.6	1265.4	± 4.1	kJ/mol	39.004198 ± 0.000070	126950-54-71
Hydrogen fluoride			-321.02	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*887
Acetic acid			-484.91	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*839
Isocyanogen bromide		341.2	335.4	± 3.4	kJ/mol	105.9214 ± 0.0013	65997-98-0*0
Dioxiranylidene anion		-110.2	-109.7	± 3.0	kJ/mol	44.01005 ± 0.00100	138832-58-30
Methyl acetate			-445.74	± 0.61	kJ/mol	74.0785 ± 0.0025	79-20-9*500
Dioxygen difluoride		75.1	71.6	± 3.6	kJ/mol	69.99561 ± 0.00060	183051-89-0*0
Hydronium radical		-18.5	-21.6	± 2.1	kJ/mol	19.02322 ± 0.00037	12168-76-2*100
Dihydrogen cation		1489.060	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*1
Oxygen difluoride cation		1292.11	1289.58	± 0.66	kJ/mol	53.99566 ± 0.00030	39432-25-2*0
Hydrogen chloride			-166.105	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*830
Isoprene			48.79	± 0.70	kJ/mol	68.1170 ± 0.0040	78-79-5*500
Hydrazoic acid cation		1333.61	1327.94	± 0.83	kJ/mol	43.02761 ± 0.00022	58852-14-5*0
Isodiazene anion		380.9	374.1	± 2.1	kJ/mol	30.02991 ± 0.00020	63986-30-10
Oxadiazirine cation		1509.9	1507.2	± 2.4	kJ/mol	44.01233 ± 0.00033	227934-45-40
Dioxymethylidyne cation		1436.6	1439.0	± 2.7	kJ/mol	44.00895 ± 0.00100	791121-04-52
Dioxymethylidyne cation		1388.2	1391.7	± 3.2	kJ/mol	44.00895 ± 0.00100	791121-04-5101
Cycloprop-2-enylide		514.8	511.8	± 2.2	kJ/mol	39.0565 ± 0.0024	20829-57-6*0
Propionic acid		-505.47	-509.61	± 0.18	kJ/mol	74.0785 ± 0.0025	79-09-4*500
Cyclohexane			-156.27	± 0.36	kJ/mol	84.1595 ± 0.0049	110-82-7*500
Ethylene glycol		-448.72	-455.24	± 0.37	kJ/mol	62.0678 ± 0.0018	107-21-1*500
Hydrazine		57.24	50.68	± 0.18	kJ/mol	32.04524 ± 0.00031	302-01-2*500
n-Heptane		-201.72	-224.18	± 0.48	kJ/mol	100.2019 ± 0.0057	142-82-5*500
Oxalic acid			-819.29	± 0.46	kJ/mol	90.0349 ± 0.0020	144-62-7*500
Hydroxyoxoammoniumyl		984.1	977.7	± 1.8	kJ/mol	47.01293 ± 0.00061	80371-48-8*1
Dimethylamine			-43.70	± 0.39	kJ/mol	45.0837 ± 0.0017	124-40-3*500
n-Octane		-226.66	-249.78	± 0.67	kJ/mol	114.2285 ± 0.0065	111-65-9*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
1,5-Hexadiene			54.42	± 0.32	kJ/mol	82.1436 ± 0.0049	592-42-7*500
Diisocyanogen cation		1825.1	1827.9	± 3.2	kJ/mol	52.0343 ± 0.0016	78800-21-21
Hydrazoic acid anion		309.0	302.7	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*1
Trifluorine		80.6	81.9	± 2.6	kJ/mol	56.9952096 ± 0.0000015	73455-86-4*0
Isocyanogen iodide		341.8	342.1	± 4.9	kJ/mol	152.92191 ± 0.00080	66004-32-8*0
Hydrogen chloride			-166.565	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*839
Cyanoaminyliumyl		1671.6	1672.9	± 2.6	kJ/mol	40.02363 ± 0.00081	316122-03-9*0
Cyanoamidogen anion		210.92	210.84	± 0.77	kJ/mol	40.02473 ± 0.00081	189879-95-6*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
Dioxohydrazine		172.89	171.13	± 0.14	kJ/mol	60.01228 ± 0.00062	16824-89-8*2
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
Carbon dioxide cation		1335.0	1335.5	± 2.4	kJ/mol	44.00895 ± 0.00100	12181-61-2*1
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
Propane cation		974.6	954.7	± 1.7	kJ/mol	44.0951 ± 0.0025	34479-70-4*0
Hydrochlorate ion		-25.2	-24.2	± 2.5	kJ/mol	36.46119 ± 0.00090	63099-75-2*0
Oxygen difluoride anion		-202.0	-201.9	± 2.7	kJ/mol	53.99675 ± 0.00030	7783-41-70
Tetrazete		764.9	759.0	± 1.8	kJ/mol	56.02696 ± 0.00028	42851-09-2*0
Bromosyl bromide		178.8	163.0	± 2.1	kJ/mol	175.8074 ± 0.0020	68322-97-4*0
1,1,1-Trichloroethane			-177.55	± 0.49	kJ/mol	133.4033 ± 0.0031	71-55-6*500
Isocyanogen iodide anion		123.0	125.1	± 9.3	kJ/mol	152.92246 ± 0.00080	66004-32-80
Carbon monoxide anion		30.0	33.7	± 2.3	kJ/mol	28.01065 ± 0.00085	12539-63-8*0
Nitrous acid anion		-105.85	-110.48	± 0.78	kJ/mol	47.01403 ± 0.00061	256393-36-9*2
Carbon monoxide		465.579	469.286	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*1
Chlorine hydride oxide		165.1	155.3	± 2.5	kJ/mol	84.4588 ± 0.0013	1027055-52-2*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
1-Methyl-1-ethylium-1-yl		1058.7	1046.1	± 2.6	kJ/mol	42.0792 ± 0.0024	121408-19-3*0
Chlorodioxidenium		1202.7	1200.4	± 3.4	kJ/mol	67.4510 ± 0.0011	64710-10-7*0
1,1-Dichloroethene			-23.81	± 0.50	kJ/mol	96.9427 ± 0.0024	75-35-4*500
Isopropylidene anion		282.9	268.8	± 2.7	kJ/mol	42.0803 ± 0.0024	121408-19-30
Dichloromethane			-123.02	± 0.50	kJ/mol	84.9320 ± 0.0020	75-09-2*590
Trioxirane		272.9	270.3	± 1.3	kJ/mol	47.99820 ± 0.00090	153851-84-4*0
1,3-Propanediyl		320.1	308.2	± 1.7	kJ/mol	42.0797 ± 0.0024	32458-33-6*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
Perchloryl cation		1252.1	1246.3	± 2.5	kJ/mol	83.4504 ± 0.0013	23594-88-9*0
Hydrogen peroxide		-193.172	-187.355	± 0.080	kJ/mol	34.01468 ± 0.00062	7722-84-1*500
Difluoromethylene anion		-211.20	-210.02	± 0.60	kJ/mol	50.00805 ± 0.00080	66212-40-6*0
Difluorodioxidanium		1283.6	1279.1	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-01
Fluoromethylidyne anion		200.8	204.3	± 1.9	kJ/mol	31.00965 ± 0.00080	33412-12-3*0
Trioxidanyl		25.32	23.23	± 0.13	kJ/mol	49.00614 ± 0.00090	12500-78-6*0
Nitrosyl nitrite anion		-103.1	-106.2	± 2.8	kJ/mol	76.01223 ± 0.00091	122413-35-81
Hydrogen bromide			-120.58	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*839
Azide			272.56	± 0.48	kJ/mol	42.02077 ± 0.00021	14343-69-2*800
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
Acetonitrile			40.61	± 0.24	kJ/mol	41.0520 ± 0.0016	75-05-8*500
Deuterium hydride		0.328	0.319	± 0.000	kJ/mol	3.022042 ± 0.000070	13983-20-5*0
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
2-Propen-3-ylium-1-ylidyne		1791.1	1792.7	± 2.6	kJ/mol	38.0474 ± 0.0024	161054-36-0*0
Chloro(chlorooxy)methylene		98.	101.	± 15.	kJ/mol	98.9155 ± 0.0020	479587-31-0*11
Peroxyhypochlorous acid cation		1030.3	1024.5	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-21
Propenediylidene anion		588.8	590.0	± 2.3	kJ/mol	38.0485 ± 0.0024	161054-36-00
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
Nitric acid			-186.85	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*801
2-Iodoethanol			-207.2	± 2.4	kJ/mol	171.9650 ± 0.0017	624-76-0*590
1,3-Butadiyne cation		1440.18	1442.04	± 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
Benzene anion		209.1	197.2	± 1.2	kJ/mol	78.1124 ± 0.0048	34562-85-1*0
Hydroxylamine			-97.1	± 2.2	kJ/mol	33.02996 ± 0.00037	7803-49-8*1000
Paraformaldehyde			-179.2	± 1.6	kJ/mol	30.02598 ± 0.00087	30525-89-4*500
Dioxodiazoxane		125.7	120.4	± 2.1	kJ/mol	76.01168 ± 0.00091	122413-35-8*3
o-Benzyne		625.6	616.2	± 1.1	kJ/mol	76.0960 ± 0.0048	462-80-6*1
Hydrogen chloride			-166.741	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*842
Hydrogen difluoride cation		1241.	1238.	± 17.	kJ/mol	39.004198 ± 0.000070	126950-54-7*1
Cyclopropylium		1104.5	1093.0	± 2.5	kJ/mol	41.0713 ± 0.0024	1724-43-2*0
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		19.72	11.97	± 0.34	kJ/mol	92.1384 ± 0.0056	108-88-3*500
Cyclopentadienylium		1087.52	1074.65	± 0.93	kJ/mol	65.0927 ± 0.0040	29661-18-5*0
Cycloheptene		-25.6	-46.7	± 1.7	kJ/mol	96.1702 ± 0.0057	628-92-2*500
Cycloheptatriene		153.56	144.78	± 0.97	kJ/mol	92.1384 ± 0.0056	544-25-2*500
Peroxychlorous acid		103.5	97.6	± 2.5	kJ/mol	84.4588 ± 0.0013	177778-92-6*2
Isocyanic fluoride		301.3	303.1	± 1.8	kJ/mol	45.01584 ± 0.00080	16992-26-0*0
Triiodine		153.4	149.4	± 3.6	kJ/mol	380.713410 ± 0.000090	12596-31-5*0
Phenylethene			104.30	± 0.48	kJ/mol	104.1491 ± 0.0064	100-42-5*500
Bromoniumyl		1097.70	1089.85	± 0.14	kJ/mol	80.9114 ± 0.0010	12258-64-9*0
Phenol		-146.43	-162.28	± 0.66	kJ/mol	94.1112 ± 0.0048	108-95-2*500
Tetraazatetrahedrane		763.7	757.2	± 1.7	kJ/mol	56.02696 ± 0.00028	12596-63-3*0
Anisole			-119.56	± 0.77	kJ/mol	108.1378 ± 0.0056	100-66-3*500
Ammonia anion		94.3	87.3	± 2.4	kJ/mol	17.03111 ± 0.00022	37353-00-7*0
Benzaldehyde		-85.8	-86.9	± 1.1	kJ/mol	106.1219 ± 0.0056	100-52-7*500
Fluorobenzene anion		-18.3	-30.2	± 1.8	kJ/mol	96.1029 ± 0.0048	34561-55-2*0
Iodobenzene cation		1022.7	1007.2	± 1.0	kJ/mol	204.0078 ± 0.0048	38406-85-8*0
Hydrogen fluoride			-321.45	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*832
Nitrobenzene			6.3	± 1.4	kJ/mol	123.1094 ± 0.0049	98-95-3*500
1-Propynylium		1547.0	1545.0	± 3.1	kJ/mol	39.0554 ± 0.0024	24858-94-4*0
Nitric acid			-197.77	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*805
Nitromethane		-114.18	-112.99	± 0.43	kJ/mol	61.0401 ± 0.0010	75-52-5*500
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			204.5	± 2.0	kJ/mol	92.1384 ± 0.0056	121-46-0*500
2,3-Butanedione			-365.60	± 0.54	kJ/mol	86.0892 ± 0.0033	431-03-8*500
2,3-Butanedione		-310.53	-327.10	± 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
Cycloprop-1-enylium		1502.3	1498.0	± 2.2	kJ/mol	39.0554 ± 0.0024	117067-78-4*0
Cycloprop-1-enylide		373.5	369.1	± 2.2	kJ/mol	39.0565 ± 0.0024	80251-77-0*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
Helium hydride cation		1350.148	1348.258	± 0.000	kJ/mol	5.009993 ± 0.000070	17009-49-3*0
Xenon hydride cation		1038.15	1036.37	± 0.89	kJ/mol	132.2974 ± 0.0200	37276-91-8*0
2-Butanone		-267.87	-273.36	± 0.91	kJ/mol	72.1057 ± 0.0033	78-93-3*500
Tetraoxodinitrogen cation		1030.6	1025.1	± 2.6	kJ/mol	92.0105 ± 0.0012	64476-91-1*0
2,4,5-Trioxa-1,3-diazabicyclo[1.1.1]pentane		602.5	593.3	± 2.1	kJ/mol	76.01168 ± 0.00091	224950-18-9*0
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
Trioxidane		-82.04	-90.64	± 0.70	kJ/mol	50.01408 ± 0.00091	14699-99-1*0
Ethenedione cation		909.5	912.7	± 2.7	kJ/mol	56.0197 ± 0.0017	12541-99-0*0
Dinitrogen dimer		-0.88	0.84	± 0.67	kJ/mol	56.02696 ± 0.00028	154680-01-0*0
1-Hydroxyethyl		-42.28	-55.71	± 0.65	kJ/mol	45.0605 ± 0.0017	2348-46-1*0
Water		-238.932	-241.836	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*2
Acetylene anion		356.8	356.7	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*0
Water trimer		-762.73	-776.84	± 0.21	kJ/mol	54.04584 ± 0.00099	31014-12-7*0
Methylaminyliumyl		1388.3	1382.0	± 2.6	kJ/mol	29.04071 ± 0.00083	56924-51-7*1
Hydrazoic acid anion		316.1	310.0	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*2
2-Hydroxyethylium		1024.6	1012.1	± 2.0	kJ/mol	45.0600 ± 0.0017	38607-31-7*1
Isocyanogen bromide anion		105.0	101.8	± 4.6	kJ/mol	105.9220 ± 0.0013	238754-53-50
mu-Oxodichlorine cation		1130.44	1126.83	± 0.63	kJ/mol	86.9043 ± 0.0018	51174-96-0*0
Hydroxyoxoammoniumyl		1014.8	1008.4	± 2.0	kJ/mol	47.01293 ± 0.00061	80371-48-8*2
Oxonium		605.83	599.08	± 0.17	kJ/mol	19.02267 ± 0.00037	13968-08-6*2
Oxoniumyl ion		978.466	975.563	± 0.028	kJ/mol	18.01473 ± 0.00033	56583-62-1*1
Trihydrogen		745.878	743.094	± 0.062	kJ/mol	3.02382 ± 0.00021	12184-91-7*1
Trioxodinitrate anion		-87.3	-93.1	± 2.2	kJ/mol	76.01223 ± 0.00091	194856-62-7*1
Formylimidogen		245.4	242.2	± 3.3	kJ/mol	43.02478 ± 0.00086	42288-92-6*2
Nitrous acid anion		-105.5	-109.4	± 1.8	kJ/mol	47.01403 ± 0.00061	256393-36-9*1
Carbon monoxide		-113.803	-110.523	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*2
mu-Oxodichlorate anion		-147.8	-147.7	± 2.5	kJ/mol	86.9053 ± 0.0018	365546-30-1*0
Propylene cation		975.22	961.69	± 0.21	kJ/mol	42.0792 ± 0.0024	34504-10-4*0
2-Propen-1-ylium-1-ylidene		1373.2	1369.6	± 2.0	kJ/mol	39.0554 ± 0.0024	88000-25-3*0
2-Oxo-1-ethylium-1-yl		1292.1	1288.8	± 2.6	kJ/mol	42.0361 ± 0.0016	214464-96-7*12
Acetaldehyde		-187.14	-191.86	± 0.32	kJ/mol	44.0526 ± 0.0017	75-07-0*500
Cyclopropane cation		1022.3	1006.8	± 1.6	kJ/mol	42.0792 ± 0.0024	34496-93-0*0
Dihydrogen cation		1488.364	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*2
Trioxirane cation		1444.6	1442.4	± 2.2	kJ/mol	47.99765 ± 0.00090	153851-84-40
Tetrabromomethane			48.7	± 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		-56.60	-59.61	± 0.19	kJ/mol	94.9385 ± 0.0013	74-83-9*590
Ethynylene		820.28	826.85	± 0.26	kJ/mol	24.0214 ± 0.0016	12070-15-4*2
Difluorodioxidanium		1287.1	1283.0	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-02
Fluorine atom		77.255	79.040	± 0.048	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*1
Dihydrogen		-0.000	-0.058	± 0.000	kJ/mol	2.01588 ± 0.00014	1333-74-0*2
Hydrogen fluoride			-321.13	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*906
Ethynylene		827.50	834.21	± 0.26	kJ/mol	24.0214 ± 0.0016	12070-15-4*1
Trioxygen difluoride		112.2	107.1	± 1.1	kJ/mol	85.99501 ± 0.00090	16829-28-0*0
Acetic acid			-484.89	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*833
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
Hydrogen peroxide		-129.480	-135.466	± 0.063	kJ/mol	34.01468 ± 0.00062	7722-84-1*2
Acetic acid			-484.94	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*850
Trihydrogen cation		1110.304	1106.697	± 0.013	kJ/mol	3.02327 ± 0.00021	28132-48-1*2
Hydrazoic acid			257.57	± 0.48	kJ/mol	43.02816 ± 0.00022	7782-79-8*1000
Hydrazoic acid			272.56	± 0.48	kJ/mol	43.02816 ± 0.00022	7782-79-8*800
Nitrosyl nitrate		60.4	52.5	± 1.9	kJ/mol	92.0111 ± 0.0012	15969-55-8*2
Methyl acetate		-394.28	-413.15	± 0.61	kJ/mol	74.0785 ± 0.0025	79-20-9*0
Hydrogen peroxide cation		897.75	890.77	± 0.37	kJ/mol	34.01413 ± 0.00062	12325-10-9*11
Peroxyhypochlorous acid anion		-2.9	-3.3	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-31
Ammonium hydroxide			-366.716	± 0.062	kJ/mol	35.04584 ± 0.00047	1336-21-6*1000
Chlorine atom		119.621	121.228	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*1
2-Chloro ozone		265.9	265.3	± 3.7	kJ/mol	83.4509 ± 0.0013	141801-66-30
1-Methylethenylium		995.2	986.0	± 2.0	kJ/mol	41.0713 ± 0.0024	50457-57-3*0
Oxygen atom pentacation		28708.788	28710.646	± 0.053	kJ/mol	15.99666 ± 0.00030	14127-66-3*0
Ethyl bromide		-55.80	-91.33	± 0.26	kJ/mol	108.9651 ± 0.0019	74-96-4*500
Hydroxylamine		-33.23	-43.60	± 0.46	kJ/mol	33.02996 ± 0.00037	7803-49-8*0
1-Methylethenyl anion		199.4	188.2	± 2.0	kJ/mol	41.0723 ± 0.0024	65887-19-6*0
Fluorosyl fluoride		227.	225.	± 21.	kJ/mol	53.99621 ± 0.00030	86825-57-2*2
Vinyl iodide		139.5	130.6	± 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
Nitrogen atom		470.579	472.442	± 0.024	kJ/mol	14.006740 ± 0.000070	17778-88-0*1
Diatomic bromine cation		1060.32	1045.36	± 0.23	kJ/mol	159.8075 ± 0.0020	12595-71-0*0
Trihydrogen		215.9	218.3	± 1.1	kJ/mol	3.02382 ± 0.00021	12184-91-7*100
Difluorovinylidene cation		1181.5	1183.0	± 2.3	kJ/mol	62.0177 ± 0.0016	268566-71-8*0
Methylene		391.068	391.625	± 0.098	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
Oxoethylidene anion		92.4	89.1	± 2.5	kJ/mol	42.0372 ± 0.0016	106543-38-8*2
Dihydrogen anion		253.8	254.7	± 1.2	kJ/mol	2.01643 ± 0.00014	12184-89-3*0
Dioxaziridine		277.3	270.6	± 2.0	kJ/mol	47.01348 ± 0.00061	67394-35-8*0
Methyl formate		-346.78	-359.82	± 0.87	kJ/mol	60.0520 ± 0.0017	107-31-3*0
Tribromide			-129.55	± 0.25	kJ/mol	239.7125 ± 0.0030	14522-80-6*800
Chloro(chlorooxy)methylene		101.1	104.7	± 4.8	kJ/mol	98.9155 ± 0.0020	479587-31-0*12
Nitrosyl nitrite anion		-100.3	-103.5	± 2.9	kJ/mol	76.01223 ± 0.00091	122413-35-82
Ethyl formate		-375.1	-393.7	± 1.2	kJ/mol	74.0785 ± 0.0025	109-94-4*0
Iodine monochloride			-24.048	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*590
Tribromine cation		1035.9	1013.2	± 2.6	kJ/mol	239.7115 ± 0.0030	33105-86-1*0
Tetroxidane		-34.2	-44.6	± 2.4	kJ/mol	66.0135 ± 0.0012	29683-94-1*0
Hydroxylamine			-107.61	± 0.63	kJ/mol	33.02996 ± 0.00037	7803-49-8*500
Polyoxymethylene			-170.88	± 0.21	kJ/mol	30.02598 ± 0.00087	9002-81-7*500
Cyclopentadiene			109.80	± 0.58	kJ/mol	66.1011 ± 0.0040	542-92-7*590
Hypochloroperoxoous acid, hydroxy ester		49.5	42.5	± 2.5	kJ/mol	84.4588 ± 0.0013	928652-99-7*2
Oxygen atom heptacation		113369.48	113371.34	± 0.12	kJ/mol	15.99556 ± 0.00030	14274-89-6*0
Carbon suboxide		-131.7	-116.6	± 1.3	kJ/mol	68.0309 ± 0.0025	504-64-3*500
Acetoxy		-182.7	-191.5	± 1.2	kJ/mol	59.0440 ± 0.0017	13799-69-4*1
1-Propenylium		1233.8	1223.4	± 2.0	kJ/mol	41.0713 ± 0.0024	50457-58-4*1
Difluorine cation		1514.301	1514.475	± 0.013	kJ/mol	37.9962578 ± 0.0000010	12184-86-0*0
Formaldehyde			-171.19	± 0.59	kJ/mol	30.02598 ± 0.00087	50-00-0*800
1-Propenylide		210.5	199.4	± 2.1	kJ/mol	41.0723 ± 0.0024	65887-20-9*1
Acetoxy		-182.7	-191.4	± 1.2	kJ/mol	59.0440 ± 0.0017	13799-69-4*0
Oxygen atom dication		4949.459	4953.000	± 0.013	kJ/mol	15.99830 ± 0.00030	14127-63-0*0
Dioxofluorine cation		1667.0	1664.8	± 2.8	kJ/mol	50.99665 ± 0.00060	223566-05-0*0
m-Benzyne		614.6	605.2	± 1.4	kJ/mol	76.0960 ± 0.0048	1828-89-3*1
1-Propen-1-yl-3-ylidene		657.4	654.0	± 1.5	kJ/mol	39.0559 ± 0.0024	84654-90-0*1
Water		-286.302	-292.743	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*510
Hydrogen iodide			-56.826	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*800
Oxygen atom octacation		197447.75	197449.60	± 0.12	kJ/mol	15.99501 ± 0.00030	21450-98-6*0
Chlorine trifluoride cation		1053.4	1049.1	± 2.4	kJ/mol	92.44736 ± 0.00090	478167-77-0*0
iso-Hexane		-180.36	-204.02	± 0.83	kJ/mol	86.1754 ± 0.0049	107-83-5*500
Tropylide		260.9	244.6	± 2.0	kJ/mol	91.1310 ± 0.0056	34464-18-1*0
Propionic acid		-436.42	-454.31	± 0.60	kJ/mol	74.0785 ± 0.0025	79-09-4*0
Deuterium molecule cation		1492.286	1492.361	± 0.000	kJ/mol	4.02765497609 ± 0.00000000080	12184-84-8*0
Deuteride		146.991	148.904	± 0.0021	kJ/mol	2.01465035791 ± 0.00000000040	14452-69-8*0
sec-Butylium		792.8	769.2	± 1.7	kJ/mol	57.1137 ± 0.0033	16548-59-7*0
Hydroxymethylene		112.67	108.92	± 0.28	kJ/mol	30.02598 ± 0.00087	19710-56-6*0
Dioxofluorine anion		155.9	154.3	± 2.5	kJ/mol	50.99775 ± 0.00060	175861-93-50
Peroxyformate		-320.7	-326.5	± 1.8	kJ/mol	61.0174 ± 0.0012	104960-05-6*2
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
Bicyclo[1.1.0]buta-1,3-dien-2-yl anion		803.7	811.3	± 2.1	kJ/mol	48.0433 ± 0.0032	289679-89-6*0
Peroxyformyl		-90.5	-95.9	± 1.8	kJ/mol	61.0168 ± 0.0012	56240-83-6*2
1,3-Butadiyn-4-ylium-1-yl		2109.9	2120.5	± 2.9	kJ/mol	48.0423 ± 0.0032	124708-46-9*0
Peroxyhypochlorous acid cation		1050.8	1045.1	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-22
1,3-Butadiynyl anion		677.7	686.8	± 1.2	kJ/mol	48.0433 ± 0.0032	59158-53-1*0
Oxygen atom trication		10249.929	10252.880	± 0.018	kJ/mol	15.99775 ± 0.00030	14127-64-1*0
Hydrazine monohydrate			-242.67	± 0.19	kJ/mol	50.06052 ± 0.00053	7803-57-8*500
Tetraoxodinitrate anion		-184.6	-187.8	± 2.4	kJ/mol	92.0116 ± 0.0012	63552-02-3*0
Hydrogen peroxide cation		931.41	924.55	± 0.94	kJ/mol	34.01413 ± 0.00062	12325-10-9*22
1,2-Dibromoethane			-80.3	± 1.2	kJ/mol	187.8612 ± 0.0026	106-93-4*500
Bromodioxy		118.1	109.1	± 4.3	kJ/mol	111.9028 ± 0.0012	67177-47-3*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
Isocyanogen cation		1653.1	1655.4	± 1.6	kJ/mol	52.0343 ± 0.0016	133415-63-1*0
Acrolein		-55.3	-65.4	± 1.2	kJ/mol	56.0633 ± 0.0024	107-02-8*0
1,2-Propadien-1-one cation		1012.6	1011.2	± 1.9	kJ/mol	54.0468 ± 0.0024	87612-93-9*0
2-Propynal cation		1168.3	1167.2	± 1.6	kJ/mol	54.0468 ± 0.0024	100815-70-1*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
Dichloromethylene		229.49	230.67	± 0.64	kJ/mol	82.9161 ± 0.0020	1605-72-7*0
Vinyl alcohol cation		778.8	767.9	± 1.4	kJ/mol	44.0520 ± 0.0017	57239-63-1*0
Chlorous acid anion		-154.3	-156.2	± 3.3	kJ/mol	68.4600 ± 0.0011	99559-66-7*0
Hydrazoic acid			261.44	± 0.65	kJ/mol	43.02816 ± 0.00022	7782-79-8*500
Propylidene anion		300.8	286.6	± 3.3	kJ/mol	42.0803 ± 0.0024	121408-55-70
Diazene		207.10	199.96	± 0.44	kJ/mol	30.02936 ± 0.00020	3618-05-1*1
Oxiranylidene		213.5	209.3	± 1.4	kJ/mol	42.0367 ± 0.0016	50983-85-2*0
Fluorosyl fluoride anion		-147.2	-146.9	± 3.0	kJ/mol	53.99675 ± 0.00030	86825-57-20
Peroxyformic acid		-279.35	-288.48	± 0.90	kJ/mol	62.0248 ± 0.0012	107-32-4*0
Dinitrogen tetraoxide		-37.86	-27.01	± 0.19	kJ/mol	92.0111 ± 0.0012	10544-72-6*500
Hydrogen cyanide anion		129.509	129.031	± 0.090	kJ/mol	27.02593 ± 0.00081	12334-27-9*0
Dichlorine cation		1108.287	1108.266	± 0.013	kJ/mol	70.9049 ± 0.0018	12595-90-3*0
mu-Oxodioxodinitrogen		984.0	981.0	± 3.2	kJ/mol	76.01113 ± 0.00091	87950-63-8*1
2-Hydroxyethylium		1019.2	1007.1	± 1.6	kJ/mol	45.0600 ± 0.0017	38607-31-7*0
Methylaminyliumyl		1388.3	1382.0	± 2.6	kJ/mol	29.04071 ± 0.00083	56924-51-7*0
Tetraoxidanyl		76.7	69.5	± 6.1	kJ/mol	65.0055 ± 0.0012	69696-93-1*1
Ethane anion		41.9	26.6	± 4.4	kJ/mol	30.0696 ± 0.0017	54064-82-3*0
Hydrogen peroxide			-190.76	± 0.30	kJ/mol	34.01468 ± 0.00062	7722-84-1*800
Dioxohydrazine		172.89	171.13	± 0.14	kJ/mol	60.01228 ± 0.00062	16824-89-8*0
Hydrogen peroxide cation		897.75	890.77	± 0.37	kJ/mol	34.01413 ± 0.00062	12325-10-9*0
Nitrogen sesquioxide cation		1027.6	1023.7	± 4.8	kJ/mol	76.01113 ± 0.00091	10544-73-70
Ethoxyethene		-110.9	-134.7	± 2.3	kJ/mol	72.1057 ± 0.0033	109-92-2*21
Hydrodioxonitrogen cation		1129.7	1123.0	± 3.2	kJ/mol	47.01293 ± 0.00061	252986-76-8*0
Chlorine pentafluoride cation		1005.8	996.8	± 3.3	kJ/mol	130.44417 ± 0.00090	478167-78-1*0
Propynylidene		597.6	599.4	± 1.3	kJ/mol	38.0480 ± 0.0024	67152-18-5*2
Trioxygen difluoride		113.4	107.6	± 2.1	kJ/mol	85.99501 ± 0.00090	16829-28-0*2
Diisocyanogen anion		456.6	462.3	± 3.6	kJ/mol	52.0354 ± 0.0016	78800-22-30
Hydrogen isocyanide anion		191.54	191.72	± 0.37	kJ/mol	27.02593 ± 0.00081	96913-22-3*0
Hydrogen peroxide		-129.460	-135.466	± 0.063	kJ/mol	34.01468 ± 0.00062	7722-84-1*1
Isoformyl anion		55.7	58.4	± 1.8	kJ/mol	29.01859 ± 0.00086	81747-63-9*0
Nitrogen atom anion		487.6	489.9	± 2.5	kJ/mol	14.007289 ± 0.000070	17778-87-9*0
Imidogen		358.75	358.79	± 0.17	kJ/mol	15.014680 ± 0.000099	13774-92-0*1
Chloromethylene		320.26	320.55	± 0.89	kJ/mol	48.4713 ± 0.0012	2108-20-5*0
Ethoxyethene		-110.4	-132.5	± 2.7	kJ/mol	72.1057 ± 0.0033	109-92-2*1
Ethoxyethene		-108.3	-131.5	± 2.3	kJ/mol	72.1057 ± 0.0033	109-92-2*11
Isofulminic acid cation		1377.1	1375.0	± 2.9	kJ/mol	43.02423 ± 0.00086	117800-60-9*0
Isocyanogen bromide cation		1469.9	1464.2	± 5.9	kJ/mol	105.9209 ± 0.0013	238754-53-5*0
Hydroxyaminylium		1019.6	1012.4	± 2.5	kJ/mol	32.02147 ± 0.00034	66097-71-0*0
1,2-Difluoroethene		-302.98	-309.08	± 0.99	kJ/mol	64.0341 ± 0.0016	1691-13-0*0
Chlorine chlorite		168.6	166.4	± 1.3	kJ/mol	102.9042 ± 0.0019	105206-44-8*0
Difluorodioxidane anion		-251.	-251.	± 28.	kJ/mol	69.99615 ± 0.00060	7783-45-10
Chlorohydroxymethyl		-54.9	-60.6	± 1.1	kJ/mol	65.4787 ± 0.0012	147139-06-8*0
Diazene		207.10	199.96	± 0.44	kJ/mol	30.02936 ± 0.00020	3618-05-1*0
Difluorovinylidene anion		-88.2	-87.1	± 2.3	kJ/mol	62.0188 ± 0.0016	107693-92-5*0
Carbon atom		1114.962	1120.109	± 0.047	kJ/mol	12.01070 ± 0.00080	7440-44-0*3
Dibromovinylidene		510.0	498.9	± 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
Hydrazine anion		232.1	217.8	± 4.1	kJ/mol	32.04579 ± 0.00031	65391-88-0*0
Bromovinylidene		466.1	460.1	± 3.8	kJ/mol	104.9333 ± 0.0019	161957-27-3*0
Chloroethane		-134.28	-135.90	± 0.27	kJ/mol	64.5138 ± 0.0019	75-00-3*500
Oxiranylium		901.1	893.1	± 1.5	kJ/mol	43.0441 ± 0.0016	57789-76-1*0
Water dimer cation		556.8	546.4	± 3.0	kJ/mol	36.03001 ± 0.00066	158061-35-9*0
Hydrogen peroxide cation		931.43	924.55	± 0.94	kJ/mol	34.01413 ± 0.00062	12325-10-9*21
1-Methoxyethenol		-284.7	-303.2	± 1.7	kJ/mol	74.0785 ± 0.0025	4453-91-2*0
Fluoro(fluorooxy)methylene		-134.8	-136.0	± 1.3	kJ/mol	66.00691 ± 0.00085	479587-30-9*0
Trioxodinitrate anion		-104.3	-107.5	± 1.9	kJ/mol	76.01223 ± 0.00091	194856-62-7*0
Tetraoxidanyl		2.0	0.2	± 3.0	kJ/mol	65.0055 ± 0.0012	69696-93-1*0
Ethylidene		361.35	354.37	± 0.76	kJ/mol	28.0532 ± 0.0016	4218-50-2*0
Oxiranyl anion		121.1	113.2	± 1.6	kJ/mol	43.0452 ± 0.0016	72722-59-9*0
Propargylenide		434.4	437.6	± 1.1	kJ/mol	38.0485 ± 0.0024	82906-05-6*0
Dinitrogen anion		192.5	192.5	± 1.7	kJ/mol	28.01403 ± 0.00014	12185-02-3*0
Formylimidogen		245.3	242.2	± 4.6	kJ/mol	43.02478 ± 0.00086	42288-92-6*1
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
Water		-238.648	-241.836	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*1
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
Chlorine trifluoride anion		-480.4	-481.9	± 3.6	kJ/mol	92.44846 ± 0.00090	184289-50-7*0
Formic acid cation		721.87	715.34	± 0.26	kJ/mol	46.0248 ± 0.0010	50614-05-6*0
Cyanogen bromide cation		1331.3	1325.0	± 1.1	kJ/mol	105.9209 ± 0.0013	34749-77-4*0
Formic acid anion		-256.2	-262.3	± 1.8	kJ/mol	46.0259 ± 0.0010	19066-82-1*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
Nitrogen atom		700.555	702.458	± 0.024	kJ/mol	14.006740 ± 0.000070	17778-88-0*2
(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
Hydrodioxonitrate		-62.3	-68.8	± 3.3	kJ/mol	47.01403 ± 0.00061	61508-71-2*0
Dioxohydrazine		192.2	188.7	± 1.8	kJ/mol	60.01228 ± 0.00062	16824-89-8*1
Chloroformyl anion		-356.5	-352.9	± 3.3	kJ/mol	63.4633 ± 0.0012	41976-93-6*0
2-Hydroxyethyl		-13.06	-26.32	± 0.61	kJ/mol	45.0605 ± 0.0017	4422-54-2*0
Diazoethenylidene cation		1771.3	1773.3	± 3.5	kJ/mol	52.0343 ± 0.0016	130760-10-00
Diazoethenylidene anion		529.8	532.4	± 3.5	kJ/mol	52.0354 ± 0.0016	130760-11-10
Ethylene anion		232.0	225.6	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*0
Oxoiodonium		1066.1	1064.1	± 1.9	kJ/mol	142.90332 ± 0.00030	81182-81-2*0
1-Propen-1-yl-3-ylidene		657.4	654.0	± 1.5	kJ/mol	39.0559 ± 0.0024	84654-90-0*0
Hydroxyformyl		-181.20	-183.74	± 0.50	kJ/mol	45.0174 ± 0.0010	2564-86-5*0
Hydroxyformyl anion		-319.52	-321.38	± 0.60	kJ/mol	45.0180 ± 0.0010	78944-70-4*0
2-Iodoethanol		-132.0	-150.2	± 2.5	kJ/mol	171.9650 ± 0.0017	624-76-0*0
Dioxodiazoxane		93.0	88.1	± 1.3	kJ/mol	76.01168 ± 0.00091	122413-35-8*0
Carbonylmethyloxonium		561.4	553.2	± 3.2	kJ/mol	59.0435 ± 0.0017	24434-00-2*0
Hydrogen peroxide cation		897.78	890.77	± 0.37	kJ/mol	34.01413 ± 0.00062	12325-10-9*12
Methoxyoxomethyl		-152.5	-160.2	± 1.5	kJ/mol	59.0440 ± 0.0017	16481-04-2*0
Methoxyoxomethyl		-151.8	-160.8	± 2.3	kJ/mol	59.0440 ± 0.0017	16481-04-2*2
Nitrosyl nitrate		48.3	40.4	± 1.8	kJ/mol	92.0111 ± 0.0012	15969-55-8*0
Isocyanomethane			146.5	± 2.3	kJ/mol	41.0520 ± 0.0016	593-75-9*500
Methoxyoxomethyl		-151.6	-159.7	± 2.3	kJ/mol	59.0440 ± 0.0017	16481-04-2*3
Difluorodioxidanium		1283.6	1280.0	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-00
Cyclopropane		41.41	35.73	± 0.54	kJ/mol	42.0797 ± 0.0024	75-19-4*500
Pentachloroethylium		836.1	834.5	± 3.3	kJ/mol	201.2844 ± 0.0048	7094-17-90
Oxonium		605.90	599.08	± 0.17	kJ/mol	19.02267 ± 0.00037	13968-08-6*1
Acetyloxoniumylidene		891.7	883.3	± 3.0	kJ/mol	59.0435 ± 0.0017	67057-47-0*1
Pentachloroethanide		-283.8	-282.3	± 3.9	kJ/mol	201.2854 ± 0.0048	263019-83-6*0
Peroxychlorous acid		96.2	90.6	± 2.1	kJ/mol	84.4588 ± 0.0013	177778-92-6*0
Imidogen		509.34	509.39	± 0.18	kJ/mol	15.014680 ± 0.000099	13774-92-0*2
Hydroxyamidogen		101.5	94.7	± 1.1	kJ/mol	32.02202 ± 0.00034	13940-32-4*0
Trihydrogen		477.4	474.7	± 2.3	kJ/mol	3.02382 ± 0.00021	12184-91-7*201
Trihydrogen		254.5	250.7	± 1.2	kJ/mol	3.02382 ± 0.00021	12184-91-7*200
Cyanic fluoride cation		1294.5	1294.9	± 1.1	kJ/mol	45.01529 ± 0.00080	62532-69-8*0
Fluorosyl fluoride cation		1413.0	1413.4	± 3.5	kJ/mol	53.99566 ± 0.00030	86825-50-50
O--HH Complex		247.2	248.2	± 2.0	kJ/mol	18.01528 ± 0.00033	7732-18-5102
Bromine atom		161.998	155.935	± 0.056	kJ/mol	79.90400 ± 0.00100	10097-32-2*2
Hydroperoxonium		762.5	752.7	± 2.0	kJ/mol	35.02207 ± 0.00064	70850-26-9*2
3-Chloro-3-methyl-3H-diazirine		230.	218.	± 40.	kJ/mol	90.5114 ± 0.0019	4222-21-3*0
Cyanogen chloride cation		1326.02	1327.35	± 0.97	kJ/mol	61.4696 ± 0.0012	37612-72-9*0
Dicarbon monoxide		377.29	381.33	± 0.98	kJ/mol	40.0208 ± 0.0016	12071-23-7*0
Cyanogen iodide cation		1271.5	1271.3	± 1.6	kJ/mol	152.92136 ± 0.00080	34749-78-5*0
(Formyloxy)methyl		-151.9	-160.0	± 1.3	kJ/mol	59.0440 ± 0.0017	3122-12-1*0
Isocyanic acid anion		-54.2	-57.3	± 3.0	kJ/mol	43.02533 ± 0.00086	444010-28-00
Carboxymethyl		-227.4	-237.3	± 1.2	kJ/mol	59.0440 ± 0.0017	2887-46-9*0
Trihydrogen cation		1110.577	1106.695	± 0.013	kJ/mol	3.02327 ± 0.00021	28132-48-1*1
Chlorine pentafluoride anion		-619.2	-622.7	± 4.4	kJ/mol	130.44526 ± 0.00090	184851-42-1*0
Water		-286.304	-285.832	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*499
Propylidyne		492.4	482.8	± 1.2	kJ/mol	41.0718 ± 0.0024	85056-54-8*0
1,2-Dichloroethene		3.45	-1.87	± 0.54	kJ/mol	96.9427 ± 0.0024	540-59-0*0
COC vdW		590.0	598.7	± 1.7	kJ/mol	40.0208 ± 0.0016	12071-24-80
Diazene cation		1132.47	1125.81	± 0.66	kJ/mol	30.02881 ± 0.00020	76986-17-9*0
Cyclopentadienide		100.0	87.0	± 1.1	kJ/mol	65.0937 ± 0.0040	12127-83-2*0
Chlorine atom		130.176	131.783	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*2
Oxonium			-285.830	± 0.027	kJ/mol	19.02267 ± 0.00037	13968-08-6*800
Nitrosyl nitrite anion		-103.1	-106.2	± 2.8	kJ/mol	76.01223 ± 0.00091	122413-35-80
2-Methoxy-2-oxoethyl		-203.4	-218.6	± 1.6	kJ/mol	73.0706 ± 0.0025	54668-31-4*0
trans-Cycloheptene		141.5	103.5	± 1.9	kJ/mol	96.1702 ± 0.0057	45509-99-7*0
Isocyanogen chloride cation		1480.8	1482.0	± 3.9	kJ/mol	61.4696 ± 0.0012	956475-91-5*0
2-Cyclopropyn-1-ylidene		898.9	905.8	± 1.6	kJ/mol	36.0321 ± 0.0024	102508-15-6*0
Trioxidaniumyl		925.4	916.5	± 1.5	kJ/mol	50.01353 ± 0.00091	161321-37-5*0
Trihydrogen		745.878	743.199	± 0.062	kJ/mol	3.02382 ± 0.00021	12184-91-7*0
(Acetyloxy)methyl		-200.8	-214.5	± 1.6	kJ/mol	73.0706 ± 0.0025	2887-49-2*0
Cyanogen chloride anion		46.6	51.0	± 3.1	kJ/mol	61.4707 ± 0.0012	12281-43-5*0
Oxoethylidene		261.2	258.4	± 1.6	kJ/mol	42.0367 ± 0.0016	39920-84-8*0
Isocyanic fluoride cation		1618.4	1619.0	± 4.0	kJ/mol	45.01529 ± 0.00080	16992-26-00
C=O-C cation		1576.2	1583.3	± 2.4	kJ/mol	40.0203 ± 0.0016	83483-98-1*0
2-Oxo-1-ethylium-1-yl		1289.5	1286.8	± 2.7	kJ/mol	42.0361 ± 0.0016	214464-96-7*1
1-Propen-1-yl-3-ylidene		657.4	653.8	± 2.2	kJ/mol	39.0559 ± 0.0024	84654-90-0*12
Water		-286.304	-292.745	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*509
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
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
Oxoethylidene anion		87.0	84.3	± 2.3	kJ/mol	42.0372 ± 0.0016	106543-38-8*0
Carbon atom		2.391	1.863	± 0.044	kJ/mol	12.01070 ± 0.00080	7440-44-0*501
Dioxymethylene		341.8	339.8	± 3.0	kJ/mol	45.0174 ± 0.0010	438586-67-5*0
Diazenide		175.7	176.7	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*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
Cyanic acid cation		1135.9	1133.3	± 2.9	kJ/mol	43.02423 ± 0.00086	59780-31-3*0
Hypochloroperoxoous acid, hydroxy ester		49.1	42.3	± 1.9	kJ/mol	84.4588 ± 0.0013	928652-99-7*0
Isocyanic fluoride anion		74.3	76.0	± 5.7	kJ/mol	45.01639 ± 0.00080	357426-78-9*0
Nitrosodioxaziridine		413.8	408.1	± 3.2	kJ/mol	76.01168 ± 0.00091	132871-99-9*2
Oxoniumyl ion		978.716	975.565	± 0.028	kJ/mol	18.01473 ± 0.00033	56583-62-1*2
Oxirene		272.91	270.76	± 0.96	kJ/mol	42.0367 ± 0.0016	157-18-6*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
Oxirene		387.9	384.5	± 1.7	kJ/mol	42.0367 ± 0.0016	157-18-6*1
Fluoromethane cation		981.81	974.31	± 0.62	kJ/mol	34.03237 ± 0.00083	59122-96-2*0
Hydrobromate ion		-6.0	-12.5	± 4.3	kJ/mol	80.9125 ± 0.0010	85532-97-4*0
Fluoromethane			-245.75	± 0.45	kJ/mol	34.03292 ± 0.00083	593-53-3*590
Diazanide		249.4	239.3	± 3.1	kJ/mol	31.03785 ± 0.00025	25415-88-7*0
Ethynol cation		1063.9	1061.2	± 3.1	kJ/mol	42.0361 ± 0.0016	84005-02-7*0
Nitrosodioxaziridine		415.3	409.5	± 2.8	kJ/mol	76.01168 ± 0.00091	132871-99-9*3
Chloromethane		-106.40	-102.44	± 0.20	kJ/mol	50.4872 ± 0.0012	74-87-3*590
Hydroperoxyimidogen		111.8	108.9	± 2.8	kJ/mol	47.01348 ± 0.00061	877456-58-1*2
Methyl bromide cation		996.24	981.32	± 0.18	kJ/mol	94.9380 ± 0.0013	12538-70-4*0
Ethynol anion		163.6	165.1	± 3.4	kJ/mol	42.0372 ± 0.0016	864971-50-6*0
Ethynol		95.4	92.9	± 1.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*0
Acetone enol		-151.9	-168.7	± 1.1	kJ/mol	58.0791 ± 0.0025	29456-04-0*0
Peroxychlorous acid		102.3	96.2	± 3.7	kJ/mol	84.4588 ± 0.0013	177778-92-6*3
Cyanomethylium		1255.9	1253.2	± 1.9	kJ/mol	40.0435 ± 0.0016	34430-18-7*0
Methanediol		-379.38	-392.77	± 0.93	kJ/mol	48.0413 ± 0.0010	463-57-0*0
Hydroperoxonium		738.1	727.8	± 1.2	kJ/mol	35.02207 ± 0.00064	70850-26-9*0
Isocyanogen chloride anion		102.7	107.2	± 3.9	kJ/mol	61.4707 ± 0.0012	923019-39-0*0
Peroxyhypochlorous acid cation		1030.3	1024.5	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-20
Nitrosodioxaziridine		413.6	408.2	± 1.8	kJ/mol	76.01168 ± 0.00091	132871-99-9*0
Ethynol		406.6	403.3	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*12
Oxide		651.	653.	± 15.	kJ/mol	16.00050 ± 0.00030	16833-27-5*0
Methyl nitrite		-52.50	-64.46	± 0.90	kJ/mol	61.0401 ± 0.0010	624-91-9*1
Methyl nitrite			-88.85	± 0.56	kJ/mol	61.0401 ± 0.0010	624-91-9*500
1,2-Dibromoethene		120.9	100.8	± 2.1	kJ/mol	185.8453 ± 0.0026	540-49-8*0
Methyl iodide cation		944.79	935.40	± 0.18	kJ/mol	141.93844 ± 0.00083	12538-72-6*0
Ethynol		409.5	406.4	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*13
Ethynol		455.7	452.3	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*14
3H-diazirin-3-ylidene-methylene		837.4	840.1	± 2.4	kJ/mol	52.0349 ± 0.0016	204253-88-3*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
Ethynol		464.3	461.0	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*15
Peroxyhypochlorous acid anion		-32.2	-34.0	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-30
Peroxyformyl		-100.46	-105.56	± 0.93	kJ/mol	61.0168 ± 0.0012	56240-83-6*0
Diazene cation		1132.47	1125.53	± 0.66	kJ/mol	30.02881 ± 0.00020	76986-17-9*1
Fluoroform			-704.34	± 0.45	kJ/mol	70.01385 ± 0.00080	75-46-7*590
Succinic acid		-795.63	-817.77	± 0.61	kJ/mol	118.0880 ± 0.0034	110-15-6*0
Fluorosyl fluoride		192.6	193.1	± 2.3	kJ/mol	53.99621 ± 0.00030	86825-57-2*0
1-Propen-1-yl-3-ylidene		666.4	662.9	± 2.2	kJ/mol	39.0559 ± 0.0024	84654-90-0*13
Methoxyethene		-88.9	-106.2	± 1.1	kJ/mol	58.0791 ± 0.0025	107-25-5*0
Hydroxymethylene anion		147.1	144.2	± 1.6	kJ/mol	30.02653 ± 0.00087	207914-87-2*0
Iminomethyl		275.82	272.22	± 0.71	kJ/mol	28.03332 ± 0.00082	15691-95-9*0
1,1-Dibromoethane			-67.3	± 1.3	kJ/mol	187.8612 ± 0.0026	557-91-5*500
Iodine monochloride		-36.511	-35.537	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*500
(Dimethylamino)methyl anion		189.5	165.3	± 3.3	kJ/mol	58.1029 ± 0.0025	125231-49-4*0
Cyanic fluoride anion		-20.4	-18.4	± 2.9	kJ/mol	45.01639 ± 0.00080	34507-50-1*0
Cyanic acid anion		-9.1	-9.4	± 3.1	kJ/mol	43.02533 ± 0.00086	58199-47-6*0
Diazene anion		265.5	258.7	± 2.0	kJ/mol	30.02991 ± 0.00020	100429-75-2*0
Chlorous acid cation		996.6	991.5	± 3.1	kJ/mol	68.4589 ± 0.0011	99559-66-70
Iminomethyl anion		237.4	233.6	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*0
Bromoform			2.5	± 1.3	kJ/mol	252.7306 ± 0.0031	75-25-2*590
1-Methylethylidene		316.5	303.6	± 2.1	kJ/mol	42.0797 ± 0.0024	40852-89-9*0
Hydrazoic acid anion		309.0	303.1	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*0
Aminomethylidyne anion		481.6	478.0	± 3.2	kJ/mol	28.03387 ± 0.00082	96808-04-7*1
Difluoromethane			-466.89	± 0.38	kJ/mol	52.02339 ± 0.00081	75-10-5*590
Krypton dication		3701.124	3701.124	± 0.013	kJ/mol	83.7989 ± 0.1000	18469-91-5*0
Nitrato		1290.61	1285.90	± 0.86	kJ/mol	62.00439 ± 0.00090	133057-96-2*0
Xenon dication		3194.14	3194.14	± 0.36	kJ/mol	131.2889 ± 0.0200	14066-95-6*0
Hydroxymethylene cation		971.9	968.3	± 1.4	kJ/mol	30.02543 ± 0.00087	135395-06-1*0
Nitrous acid anion		-105.85	-109.33	± 0.78	kJ/mol	47.01403 ± 0.00061	256393-36-9*0
Cyanogen		274.07	289.32	± 0.43	kJ/mol	52.0349 ± 0.0016	460-19-5*500
3-Buten-2-one		-95.65	-111.19	± 0.88	kJ/mol	70.0898 ± 0.0032	78-94-4*0
Fluorine atom		82.090	83.875	± 0.048	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*2
3-Buten-2-one		-94.1	-110.1	± 1.6	kJ/mol	70.0898 ± 0.0032	78-94-4*2
Methoxyethene		-81.5	-98.6	± 2.4	kJ/mol	58.0791 ± 0.0025	107-25-5*1
1,3-Butadien-2-ol		-48.5	-64.8	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*12
Dioxyamidogen		251.1	244.5	± 2.5	kJ/mol	47.01348 ± 0.00061	71843-95-3*1
1,3-Butadien-2-ol		-38.3	-54.7	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*22
Diazene anion		265.5	258.7	± 2.0	kJ/mol	30.02991 ± 0.00020	100429-75-2*1
1,3-Butadien-2-ol		-43.1	-59.2	± 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
Diiodine cation		963.523	960.408	± 0.018	kJ/mol	253.808391 ± 0.000060	28712-14-3*0
Methane anion		27.3	19.4	± 5.1	kJ/mol	16.04301 ± 0.00085	27680-53-1*0
1-Propen-1-yl-3-ylidene		699.9	697.0	± 3.5	kJ/mol	39.0559 ± 0.0024	84654-90-0*2
O--HH Complex		247.6	248.9	± 2.7	kJ/mol	18.01528 ± 0.00033	7732-18-5101
Isocyanogen anion		385.5	387.6	± 3.4	kJ/mol	52.0354 ± 0.0016	83951-85-30
Peroxyformate		-341.00	-346.45	± 0.96	kJ/mol	61.0174 ± 0.0012	104960-05-6*0
Diisocyanogen cation		1825.1	1828.3	± 3.2	kJ/mol	52.0343 ± 0.0016	78800-21-20
1,2-Propadien-1-one anion		49.5	48.3	± 3.1	kJ/mol	54.0479 ± 0.0024	159171-62-7*0
Ethoxyethene		-117.4	-135.9	± 1.5	kJ/mol	72.1057 ± 0.0033	109-92-2*0
Perchloric acid cation		1191.8	1182.2	± 3.5	kJ/mol	100.4577 ± 0.0015	91712-47-9*0
Water anion		-50.1	-53.0	± 4.3	kJ/mol	18.01583 ± 0.00033	12259-30-2*0
2-Cyclopropen-1-one cation		1078.6	1075.2	± 2.0	kJ/mol	54.0468 ± 0.0024	100815-68-7*0
Ethenol		-112.73	-123.16	± 0.66	kJ/mol	44.0526 ± 0.0017	557-75-5*0
Methylaminyliumyl		1423.0	1416.1	± 2.6	kJ/mol	29.04071 ± 0.00083	56924-51-7*2
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

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. 1.122h of the Thermochemical Network (2020); available at ATcT.anl.gov
4		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)
5		Y.-C. Chang, B. Xiong, D. H. Bross, B. Ruscic, and C. Y. Ng, A Vacuum Ultraviolet laser Pulsed Field Ionization-Photoion Study of Methane (CH4): Determination of the Appearance Energy of Methylium From Methane with Unprecedented Precision and the Resulting Impact on the Bond Dissociation Energies of CH4 and CH4+. Phys. Chem. Chem. Phys. 19, 9592-9605 (2017) [DOI: 10.1039/c6cp08200a] (part of 2017 PCCP Hot Articles collection)
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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