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

Below is a list of 0 K and 298.15 K enthalpies of formation for all 1414 species included in version 1.122d (as of 12/09/2015).
This version of ATcT results was generated from an expansion of version 1.122b [4][5] to include the enthalpies of formation of methylamine, dimethylamine and trimethylamine that were used as reference values to derive the bond dissociation energies of 20 diatomic molecules containing 3d transition metals.[6].

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

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

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

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Species Name	Image	Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units	Relative Molecular Mass	ATcT ID
Dihydrogen		0	0	exact		2.01588 ± 0.00014	1333-74-0*0
Helium		0	0	exact		4.0026020 ± 0.0000020	7440-59-7*0
Carbon atom		0	0	exact		12.01070 ± 0.00080	7440-44-0*500
Dinitrogen		0	0	exact		28.01348 ± 0.00014	7727-37-9*0
Dioxygen		0	0	exact		31.99880 ± 0.00060	7782-44-7*0
Difluorine		0	0	exact		37.9968064 ± 0.0000010	7782-41-4*0
Neon		0	0	exact		20.17970 ± 0.00060	7440-01-9*0
Dichlorine		0	0	exact		70.9054 ± 0.0018	7782-50-5*0
Argon		0	0	exact		39.94800 ± 0.00100	7440-37-1*0
Dibromine		0	0	exact		159.8080 ± 0.0020	7726-95-6*500
Krypton		0	0	exact		83.8000 ± 0.1000	7439-90-9*0
Diiodine		0	0	exact		253.808940 ± 0.000060	7553-56-2*500
Xenon		0	0	exact		131.2900 ± 0.0200	7440-63-3*0
Deuterium molecule		0	0	exact		4.02820355600 ± 0.00000000080	7782-39-0*0
Hydrogen atom		216.034	217.998	± 0.000	kJ/mol	1.007940 ± 0.000070	12385-13-6*0
Carbon atom		711.407	716.892	± 0.048	kJ/mol	12.01070 ± 0.00080	7440-44-0*0
Oxygen atom		246.844	249.229	± 0.0021	kJ/mol	15.99940 ± 0.00030	17778-80-2*0
Nitrogen atom		470.579	472.441	± 0.024	kJ/mol	14.006740 ± 0.000070	17778-88-0*0
Chlorine atom		119.621	121.302	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*0
Carbon dioxide		-393.109	-393.475	± 0.015	kJ/mol	44.00950 ± 0.00100	124-38-9*0
Fluorine atom		77.253	79.359	± 0.048	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*0
Methane		-66.556	-74.525	± 0.056	kJ/mol	16.04246 ± 0.00085	74-82-8*0
Water		-286.308	-285.836	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*500
Water		-238.938	-241.842	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*0
Ethane		-68.33	-83.96	± 0.13	kJ/mol	30.0690 ± 0.0017	74-84-0*0
Hydron		1528.084	1530.047	± 0.000	kJ/mol	1.007391 ± 0.000070	12408-02-5*0
Bromine atom		117.917	111.855	± 0.056	kJ/mol	79.90400 ± 0.00100	10097-32-2*0
Ethylene		60.91	52.39	± 0.12	kJ/mol	28.0532 ± 0.0016	74-85-1*0
Hydrogen chloride		-91.989	-92.173	± 0.0062	kJ/mol	36.46064 ± 0.00090	7647-01-0*0
Hydroxyl		37.242	37.482	± 0.027	kJ/mol	17.00734 ± 0.00031	3352-57-6*0
Methyl		149.829	146.414	± 0.080	kJ/mol	15.03452 ± 0.00083	2229-07-4*0
Carbon monoxide		-113.802	-110.522	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*0
Methanol		-189.95	-200.84	± 0.15	kJ/mol	32.04186 ± 0.00090	67-56-1*0
Hydrogen fluoride		-272.679	-272.726	± 0.049	kJ/mol	20.006343 ± 0.000070	7664-39-3*0
Hydrogen bromide		-27.72	-35.57	± 0.16	kJ/mol	80.9119 ± 0.0010	10035-10-6*0
Iodine atom		107.157	106.757	± 0.0021	kJ/mol	126.904470 ± 0.000030	14362-44-8*0
Formaldehyde		-105.347	-109.186	± 0.098	kJ/mol	30.02598 ± 0.00087	50-00-0*0
Acetylene		228.83	228.27	± 0.13	kJ/mol	26.0373 ± 0.0016	74-86-2*0
Ethyl		130.94	119.87	± 0.28	kJ/mol	29.0611 ± 0.0016	2025-56-1*0
Propane		-82.74	-105.03	± 0.19	kJ/mol	44.0956 ± 0.0025	74-98-6*0
Ethanol		-216.92	-234.64	± 0.21	kJ/mol	46.0684 ± 0.0017	64-17-5*0
Chloromethane		-74.17	-82.10	± 0.25	kJ/mol	50.4872 ± 0.0012	74-87-3*0
Nitric oxide		90.616	91.120	± 0.065	kJ/mol	30.00614 ± 0.00031	10102-43-9*0
Ammonia		-38.565	-45.557	± 0.030	kJ/mol	17.03056 ± 0.00022	7664-41-7*0
Hydrogen cyanide		129.668	129.283	± 0.091	kJ/mol	27.02538 ± 0.00081	74-90-8*0
Nitrogen dioxide		36.855	34.048	± 0.065	kJ/mol	46.00554 ± 0.00060	10102-44-0*0
Methyl fluoride		-227.44	-235.47	± 0.24	kJ/mol	34.03292 ± 0.00083	593-53-3*0
Hydrogen iodide		28.646	26.470	± 0.036	kJ/mol	127.912410 ± 0.000076	10034-85-2*0
Propene		34.98	19.98	± 0.21	kJ/mol	42.0797 ± 0.0024	115-07-1*0
Hydroxyde		-139.099	-139.066	± 0.027	kJ/mol	17.00789 ± 0.00031	14280-30-9*0
Hydrogen peroxide		-129.492	-135.478	± 0.063	kJ/mol	34.01468 ± 0.00062	7722-84-1*0
Dioxidanyl		15.12	12.21	± 0.15	kJ/mol	33.00674 ± 0.00060	3170-83-0*0
Methyl bromide		-20.18	-35.58	± 0.27	kJ/mol	94.9385 ± 0.0013	74-83-9*0
Benzene		100.58	83.07	± 0.23	kJ/mol	78.1118 ± 0.0048	71-43-2*0
Hypochlorous acid		-73.875	-76.815	± 0.028	kJ/mol	52.46004 ± 0.00095	7790-92-3*0
Acetaldehyde		-154.96	-165.44	± 0.28	kJ/mol	44.0526 ± 0.0017	75-07-0*0
Dibromine		45.68	30.89	± 0.12	kJ/mol	159.8080 ± 0.0020	7726-95-6*0
Fluoride		-250.912	-249.127	± 0.048	kJ/mol	18.99895178 ± 0.00000050	16984-48-8*0
Tetrafluoromethane		-927.41	-933.39	± 0.26	kJ/mol	88.00431 ± 0.00080	75-73-0*0
Methylene		391.03	391.59	± 0.12	kJ/mol	14.02658 ± 0.00081	2465-56-7*1
Methylene		428.70	429.11	± 0.12	kJ/mol	14.02658 ± 0.00081	2465-56-7*2
Methylidyne		592.81	596.15	± 0.11	kJ/mol	13.01864 ± 0.00080	3315-37-5*0
Tetrachloromethane		-93.50	-95.67	± 0.45	kJ/mol	153.8215 ± 0.0037	56-23-5*0
Diiodine		65.497	62.417	± 0.0041	kJ/mol	253.808940 ± 0.000060	7553-56-2*0
Formic acid		-371.06	-378.38	± 0.22	kJ/mol	46.0254 ± 0.0010	64-18-6*1
Propyne		192.82	185.76	± 0.25	kJ/mol	40.0639 ± 0.0024	74-99-7*0
Fluoroform		-688.79	-695.74	± 0.44	kJ/mol	70.01385 ± 0.00080	75-46-7*0
Toluene		73.44	50.15	± 0.34	kJ/mol	92.1384 ± 0.0056	108-88-3*0
Oxonium		605.84	599.09	± 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		-206.620	-212.682	± 0.056	kJ/mol	79.90455 ± 0.00100	24959-67-9*0
Ozone		144.396	141.734	± 0.039	kJ/mol	47.99820 ± 0.00090	10028-15-6*0
Hypobromous acid		-51.71	-62.18	± 0.59	kJ/mol	96.9113 ± 0.0010	13517-11-8*0
Methoxy		28.99	21.62	± 0.29	kJ/mol	31.03392 ± 0.00088	2143-68-2*0
n-Butane		-98.65	-125.96	± 0.26	kJ/mol	58.1222 ± 0.0033	106-97-8*0
Chloroethane		-96.80	-111.38	± 0.20	kJ/mol	64.5138 ± 0.0019	75-00-3*0
Methylamine		-7.01	-21.72	± 0.31	kJ/mol	31.05714 ± 0.00088	74-89-5*0
Chlorine monoxide		101.125	101.716	± 0.035	kJ/mol	51.45210 ± 0.00095	14989-30-1*0
Trifluoromethyl		-465.02	-467.82	± 0.49	kJ/mol	69.00591 ± 0.00080	2264-21-3*0
Ethylium		914.95	902.87	± 0.31	kJ/mol	29.0606 ± 0.0016	14936-94-8*0
Hydroxymethyl		-10.49	-16.80	± 0.28	kJ/mol	31.03392 ± 0.00088	2597-43-5*0
Oxomethylium		827.804	827.220	± 0.098	kJ/mol	29.01749 ± 0.00086	17030-74-9*0
Vinyl		301.14	296.94	± 0.34	kJ/mol	27.0452 ± 0.0016	2669-89-8*0
Imidogen		358.74	358.79	± 0.17	kJ/mol	15.014680 ± 0.000099	13774-92-0*0
Allene		197.37	189.89	± 0.26	kJ/mol	40.0639 ± 0.0024	463-49-0*0
Methoxide		-122.48	-130.21	± 0.31	kJ/mol	31.03447 ± 0.00088	3315-60-4*0
Nitrilomethyl		436.71	439.99	± 0.15	kJ/mol	26.01744 ± 0.00080	2074-87-5*0
Dioxymethyl	$[O-]\[O+]=C$	111.90	104.90	± 0.63	kJ/mol	46.0254 ± 0.0010	56077-92-0*0
Difluorophosgene		-603.40	-606.50	± 0.48	kJ/mol	66.00691 ± 0.00085	353-50-4*0
Nitric acid		-124.49	-134.20	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*0
Ketene		-45.37	-48.49	± 0.13	kJ/mol	42.0367 ± 0.0016	463-51-4*0
Formyl		41.429	41.805	± 0.098	kJ/mol	29.01804 ± 0.00086	2597-44-6*0
Phenol		-74.52	-93.12	± 0.68	kJ/mol	94.1112 ± 0.0048	108-95-2*0
Methylium		1099.234	1095.291	± 0.078	kJ/mol	15.03397 ± 0.00083	14531-53-4*0
Hypoflorous acid		-84.40	-87.30	± 0.19	kJ/mol	36.00574 ± 0.00031	14034-79-8*0
Iodide		-187.995	-188.396	± 0.0021	kJ/mol	126.905019 ± 0.000030	20461-54-5*0
Vinyl chloride		29.44	21.86	± 0.31	kJ/mol	62.4979 ± 0.0018	75-01-4*0
Phenyl		350.19	336.83	± 0.56	kJ/mol	77.1039 ± 0.0048	2396-01-2*0
Cyanogen chloride		135.04	135.73	± 0.47	kJ/mol	61.4701 ± 0.0012	506-77-4*0
Cyanogen bromide		187.1	180.5	± 1.1	kJ/mol	105.9214 ± 0.0013	506-68-3*0
Methyl iodide		24.40	14.86	± 0.18	kJ/mol	141.93899 ± 0.00083	74-88-4*0
Acetone		-199.56	-216.25	± 0.32	kJ/mol	58.0791 ± 0.0025	67-64-1*0
Oxygen atom anion		105.868	108.097	± 0.0021	kJ/mol	15.99995 ± 0.00030	14337-01-0*0
Ethoxide		-163.35	-178.29	± 0.53	kJ/mol	45.0610 ± 0.0017	16331-64-9*0
Hydrogen chloride			-166.454	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*834
Amidogen		188.91	186.02	± 0.12	kJ/mol	16.02262 ± 0.00016	13770-40-6*0
Trihydrogen cation		1110.304	1106.696	± 0.013	kJ/mol	3.02327 ± 0.00021	28132-48-1*0
iso-Butane		-106.16	-134.76	± 0.32	kJ/mol	58.1222 ± 0.0033	75-28-5*0
Dichloromethane		-87.55	-94.41	± 0.49	kJ/mol	84.9320 ± 0.0020	75-09-2*0
Tetrabromomethane		133.2	103.5	± 1.3	kJ/mol	331.6267 ± 0.0041	558-13-4*0
Methylene fluoride		-443.00	-450.58	± 0.36	kJ/mol	52.02339 ± 0.00081	75-10-5*0
Oxygen difluoride		26.80	24.55	± 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
2-Propynyl		353.99	351.43	± 0.38	kJ/mol	39.0559 ± 0.0024	2932-78-7*0
Propynylidene		543.38	546.38	± 0.63	kJ/mol	38.0480 ± 0.0024	67152-18-5*1
Chloroform		-97.43	-102.34	± 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		814.62	823.58	± 0.55	kJ/mol	36.0321 ± 0.0024	12075-35-3*0
Cyanic fluoride		8.78	9.11	± 0.71	kJ/mol	45.01584 ± 0.00080	1495-50-7*0
Allyl		179.54	167.82	± 0.55	kJ/mol	41.0718 ± 0.0024	1981-80-2*0
1-Hydroxyethyl		-42.00	-55.43	± 0.65	kJ/mol	45.0605 ± 0.0017	2348-46-1*1
2-Hydroxyethyl		-12.84	-26.11	± 0.63	kJ/mol	45.0605 ± 0.0017	4422-54-2*1
Methylperoxy		22.31	12.66	± 0.50	kJ/mol	47.0333 ± 0.0010	2143-58-0*0
Tetrafluoroethylene		-671.33	-674.73	± 0.58	kJ/mol	100.0150 ± 0.0016	116-14-3*0
Chlorine fluoride		-55.622	-55.717	± 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
Hydride		143.264	145.228	± 0.000	kJ/mol	1.008489 ± 0.000070	12184-88-2*0
Nitrosyl hydride		109.93	106.96	± 0.11	kJ/mol	31.01408 ± 0.00032	14332-28-6*0
Nitrous acid		-73.023	-79.167	± 0.079	kJ/mol	47.01348 ± 0.00061	7782-77-6*1
Ethynylene		820.28	828.74	± 0.27	kJ/mol	24.0214 ± 0.0016	12070-15-4*0
Ethynyl		563.87	567.99	± 0.15	kJ/mol	25.0293 ± 0.0016	2122-48-7*0
Methyl hydroperoxide		-115.03	-127.85	± 0.76	kJ/mol	48.0413 ± 0.0010	3031-73-0*0
iso-Propyl		105.05	88.18	± 0.56	kJ/mol	43.0877 ± 0.0024	2025-55-0*0
Phosgene		-217.44	-219.13	± 0.27	kJ/mol	98.9155 ± 0.0020	75-44-5*0
Fluoromethylidyne		243.14	246.74	± 0.13	kJ/mol	31.00910 ± 0.00080	3889-75-6*0
Phenylium		1148.45	1135.67	± 0.88	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	-59.0	± 3.1	kJ/mol	143.91181 ± 0.00031	14332-21-9*0
Methanium		921.98	911.73	± 0.45	kJ/mol	17.04985 ± 0.00087	15135-49-6*0
Hydroxylamine		-33.24	-43.62	± 0.50	kJ/mol	33.02996 ± 0.00037	7803-49-8*1
Oxirane		-40.01	-52.55	± 0.38	kJ/mol	44.0526 ± 0.0017	75-21-8*0
Hydroxyformyl		-181.19	-184.16	± 0.50	kJ/mol	45.0174 ± 0.0010	2564-86-5*1
Formate		-462.90	-466.55	± 0.56	kJ/mol	45.0180 ± 0.0010	71-47-6*0
Isocyanic acid		-115.84	-118.84	± 0.31	kJ/mol	43.02478 ± 0.00086	75-13-8*0
Chlorotrifluoromethane		-704.89	-710.00	± 0.72	kJ/mol	104.4586 ± 0.0012	75-72-9*0
Bromotrifluoromethane		-639.28	-651.40	± 0.51	kJ/mol	148.9099 ± 0.0013	75-63-8*0
Fluorobenzene		-99.10	-114.77	± 0.89	kJ/mol	96.1023 ± 0.0048	462-06-6*0
Nitromethane		-60.85	-74.75	± 0.46	kJ/mol	61.0401 ± 0.0010	75-52-5*0
Chlorine dioxide		101.32	98.85	± 0.27	kJ/mol	67.4515 ± 0.0011	10049-04-4*0
Dioxygen cation		1164.585	1165.221	± 0.0092	kJ/mol	31.99825 ± 0.00060	12185-07-8*0
Methylidyne		664.61	667.94	± 0.60	kJ/mol	13.01864 ± 0.00080	3315-37-5*2
Aminomethyl		158.90	149.06	± 0.44	kJ/mol	30.04920 ± 0.00085	10507-29-6*0
Ethoxy		1.84	-12.07	± 0.52	kJ/mol	45.0605 ± 0.0017	2154-50-9*51
Cyanato		127.03	127.50	± 0.35	kJ/mol	42.01684 ± 0.00086	22400-26-6*0
Dimethylamine		3.53	-18.11	± 0.48	kJ/mol	45.0837 ± 0.0017	124-40-3*0
Bromoform		75.2	49.1	± 1.3	kJ/mol	252.7306 ± 0.0031	75-25-2*0
Hydrogen fluoride			-334.48	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*800
Bromine monoxide		131.14	123.61	± 0.28	kJ/mol	95.9034 ± 0.0010	15656-19-6*0
Hypobromite		-96.15	-103.63	± 0.54	kJ/mol	95.9039 ± 0.0010	14380-62-2*0
Fluorodioxidanyl		26.80	25.09	± 0.26	kJ/mol	50.99720 ± 0.00060	15499-23-7*0
Peroxynitrous acid		-6.10	-14.54	± 0.36	kJ/mol	63.01288 ± 0.00091	14691-52-2*3
Cyclopropane		70.77	53.63	± 0.47	kJ/mol	42.0797 ± 0.0024	75-19-4*0
Propadienylidene		554.43	555.57	± 0.41	kJ/mol	38.0480 ± 0.0024	60731-10-4*0
1-Butene		20.86	-0.09	± 0.38	kJ/mol	56.1063 ± 0.0032	106-98-9*0
Acetyl		-3.37	-10.03	± 0.36	kJ/mol	43.0446 ± 0.0016	3170-69-2*0
Dichloromethylene		229.49	230.67	± 0.65	kJ/mol	82.9161 ± 0.0020	1605-72-7*2
Fluoroethane		-257.21	-272.07	± 0.38	kJ/mol	48.0595 ± 0.0016	353-36-6*0
Ethyl bromide		-41.12	-63.07	± 0.26	kJ/mol	108.9651 ± 0.0019	74-96-4*0
Vinyl fluoride		-134.62	-142.43	± 0.48	kJ/mol	46.0436 ± 0.0016	75-02-5*0
Vinyl bromide		88.77	73.97	± 0.61	kJ/mol	106.9492 ± 0.0019	593-60-2*0
2-Bromoethanol		-196.57	-220.63	± 0.57	kJ/mol	124.9645 ± 0.0019	540-51-2*0
Chlorobenzene		67.13	52.17	± 0.61	kJ/mol	112.5566 ± 0.0049	108-90-7*0
Difluorodioxidane		35.29	31.57	± 0.41	kJ/mol	69.99561 ± 0.00060	7783-44-0*0
Nitrous oxide		85.991	82.562	± 0.097	kJ/mol	44.01288 ± 0.00033	10024-97-2*0
(E)-Diazene		207.09	199.95	± 0.44	kJ/mol	30.02936 ± 0.00020	15626-43-4*0
Hydroxyoxomethylium		600.69	597.60	± 0.44	kJ/mol	45.0169 ± 0.0010	638-71-1*0
Trioxidane		-81.71	-90.55	± 0.72	kJ/mol	50.01408 ± 0.00091	14699-99-1*1
Vinylium		1119.15	1115.70	± 0.59	kJ/mol	27.0447 ± 0.0016	14604-48-9*0
Hydroxymethylium		717.75	709.80	± 0.18	kJ/mol	31.03337 ± 0.00088	18682-95-6*0
Cyanogen		308.24	310.18	± 0.43	kJ/mol	52.0349 ± 0.0016	460-19-5*0
Propyl		118.27	100.87	± 0.60	kJ/mol	43.0877 ± 0.0024	2143-61-5*0
Dioxidanide		-88.87	-91.53	± 0.35	kJ/mol	33.00729 ± 0.00060	14691-59-9*0
n-Butyl		102.52	80.02	± 0.72	kJ/mol	57.1143 ± 0.0033	2492-36-6*0
1,3-Butadiene		125.05	110.57	± 0.40	kJ/mol	54.0904 ± 0.0032	106-99-0*0
n-Pentane		-114.50	-146.38	± 0.31	kJ/mol	72.1488 ± 0.0041	109-66-0*0
Ethynide		277.42	280.83	± 0.18	kJ/mol	25.0299 ± 0.0016	29075-95-4*0
Formic acid		-371.06	-378.36	± 0.22	kJ/mol	46.0254 ± 0.0010	64-18-6*0
2-Chloroethanol		-250.05	-266.76	± 0.63	kJ/mol	80.5132 ± 0.0019	107-07-3*0
Bromobenzene		126.6	104.6	± 1.3	kJ/mol	157.0079 ± 0.0049	108-86-1*0
Benzaldehyde		-19.22	-37.02	± 0.92	kJ/mol	106.1219 ± 0.0056	100-52-7*0
Hypofluorite		-108.85	-108.68	± 0.48	kJ/mol	34.99835 ± 0.00030	12763-66-5*0
Chlorous acid		25.75	20.69	± 0.63	kJ/mol	68.4594 ± 0.0011	13898-47-0*0
Water			-285.836	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*590
Iodoxyl radical		126.97	125.04	± 0.82	kJ/mol	142.90387 ± 0.00030	14696-98-1*0
Ammonium		643.04	631.73	± 0.21	kJ/mol	18.03795 ± 0.00029	14798-03-9*0
Azanide		114.89	112.02	± 0.33	kJ/mol	16.02317 ± 0.00016	17655-31-1*0
Hydroxyamidogen		101.6	94.8	± 1.1	kJ/mol	32.02202 ± 0.00034	13940-32-4*1
Nitrate		-300.30	-306.77	± 0.62	kJ/mol	62.00549 ± 0.00090	14797-55-8*0
Cyanogen iodide		222.5	222.0	± 1.6	kJ/mol	152.92191 ± 0.00080	506-78-5*0
Formyl anion		11.63	12.02	± 0.44	kJ/mol	29.01859 ± 0.00086	57340-31-5*0
2-Propynylidyne		717.94	722.29	± 0.81	kJ/mol	37.0400 ± 0.0024	53590-28-6*0
Isobutene		3.95	-17.12	± 0.43	kJ/mol	56.1063 ± 0.0032	115-11-7*0
Methanetetraylbisamidogen		450.41	450.81	± 0.68	kJ/mol	40.02418 ± 0.00081	2669-76-3*0
Trichloromethyl		71.91	71.43	± 0.86	kJ/mol	118.3688 ± 0.0028	3170-80-7*0
Chloromethylene		320.24	320.52	± 0.89	kJ/mol	48.4713 ± 0.0012	2108-20-5*2
Methylene bromide		25.5	4.1	± 1.1	kJ/mol	173.8346 ± 0.0022	74-95-3*0
2-Fluoroethanol		-406.6	-423.9	± 1.3	kJ/mol	64.0589 ± 0.0017	371-62-0*0
Phenide		244.44	231.01	± 0.42	kJ/mol	77.1044 ± 0.0048	30922-78-2*0
Phenolate		-146.09	-161.56	± 0.93	kJ/mol	93.1038 ± 0.0048	3229-70-7*0
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		-583.82	-589.70	± 0.55	kJ/mol	195.91038 ± 0.00080	2314-97-8*0
Nitrogen atom cation		1872.907	1875.688	± 0.024	kJ/mol	14.006191 ± 0.000070	14158-23-7*0
Azido radical		452.25	449.66	± 0.60	kJ/mol	42.02022 ± 0.00021	12596-60-0*0
Trinitrogen cation		1519.41	1516.88	± 0.89	kJ/mol	42.01967 ± 0.00021	12185-03-4*0
Oxonitrate anion		87.91	87.94	± 0.12	kJ/mol	30.00669 ± 0.00031	14967-78-3*0
Carbon monoxide cation		1238.308	1241.588	± 0.026	kJ/mol	28.00955 ± 0.00085	12144-04-6*0
Nitrosyl ion		984.484	984.479	± 0.065	kJ/mol	30.00559 ± 0.00031	14452-93-8*0
Nitroxyl		71.13	64.52	± 0.90	kJ/mol	32.02202 ± 0.00034	13408-29-2*0
Hydrazoic acid		297.90	291.61	± 0.49	kJ/mol	43.02816 ± 0.00022	7782-79-8*0
Ethanium		874.39	858.12	± 0.62	kJ/mol	31.0764 ± 0.0017	24669-33-8*1
Acetylium		666.87	659.58	± 0.47	kJ/mol	43.0441 ± 0.0016	15762-07-9*0
Cyanide		63.964	67.250	± 0.095	kJ/mol	26.01799 ± 0.00080	57-12-5*0
Hydroxymethylene		112.70	108.93	± 0.28	kJ/mol	30.02598 ± 0.00087	19710-56-6*1
Carbonic acid		-602.74	-612.91	± 0.79	kJ/mol	62.0248 ± 0.0012	463-79-6*1
Hydrogen bromide			-120.71	± 0.16	kJ/mol	80.9119 ± 0.0010	10035-10-6*800
n-Hexane		-130.10	-166.98	± 0.34	kJ/mol	86.1754 ± 0.0049	110-54-3*0
1-Hydroxyethylium		609.13	594.70	± 0.39	kJ/mol	45.0600 ± 0.0017	18682-96-7*1
Ethoxy		6.09	-8.35	± 0.52	kJ/mol	45.0605 ± 0.0017	2154-50-9*52
Dicarbon monoxide		377.3	381.3	± 1.1	kJ/mol	40.0208 ± 0.0016	12071-23-7*1
Formic acid		-354.70	-361.94	± 0.39	kJ/mol	46.0254 ± 0.0010	64-18-6*2
Formyloxidanyl		-125.57	-127.23	± 0.56	kJ/mol	45.0174 ± 0.0010	16499-21-1*1
Trimethylamine		1.16	-27.69	± 0.92	kJ/mol	59.1103 ± 0.0025	75-50-3*0
Chlorodifluoromethane		-476.4	-482.5	± 1.2	kJ/mol	86.4681 ± 0.0012	75-45-6*0
Fluoromethylene		148.34	148.62	± 0.46	kJ/mol	32.01704 ± 0.00080	13453-52-6*2
Fluoroformyl		-176.61	-176.03	± 0.39	kJ/mol	47.00850 ± 0.00085	1871-24-5*0
Hydrogen chloride			-166.993	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*800
Bromonium		925.2	914.5	± 1.5	kJ/mol	81.9193 ± 0.0010	36658-54-5*0
Hydrogen peroxide cation		896.57	889.59	± 0.58	kJ/mol	34.01413 ± 0.00062	12325-10-9*1
Hydrazine		111.56	97.41	± 0.49	kJ/mol	32.04524 ± 0.00031	302-01-2*0
Ethylidene		361.30	354.30	± 0.91	kJ/mol	28.0532 ± 0.0016	4218-50-2*1
Vinyl anion		237.01	232.59	± 0.87	kJ/mol	27.0458 ± 0.0016	25012-81-1*0
Aminomethylium		763.55	751.58	± 0.66	kJ/mol	30.04865 ± 0.00085	488821-23-4*0
Peroxyformic acid		-279.8	-289.1	± 1.1	kJ/mol	62.0248 ± 0.0012	107-32-4*1
1-Methylethenyl		262.81	252.46	± 0.78	kJ/mol	41.0718 ± 0.0024	15552-77-9*0
trans-2-Butene		9.24	-11.32	± 0.41	kJ/mol	56.1063 ± 0.0032	624-64-6*0
cis-2-Butene	$C/C=C\C$	13.93	-7.34	± 0.42	kJ/mol	56.1063 ± 0.0032	590-18-1*0
Cyclopentane		-45.04	-77.61	± 0.44	kJ/mol	70.1329 ± 0.0041	287-92-3*0
Cyclopentadiene		149.85	132.73	± 0.76	kJ/mol	66.1011 ± 0.0040	542-92-7*0
1-Hydroxyethyl		-40.46	-53.93	± 0.93	kJ/mol	45.0605 ± 0.0017	2348-46-1*2
Protonated oxirane		725.23	709.06	± 0.67	kJ/mol	45.0600 ± 0.0017	38607-31-70
Ethenol		-112.76	-123.95	± 0.84	kJ/mol	44.0526 ± 0.0017	557-75-5*1
Oxoethenyl		176.97	178.09	± 0.61	kJ/mol	41.0287 ± 0.0016	51095-15-9*0
Methanediol		-379.2	-393.4	± 1.1	kJ/mol	48.0413 ± 0.0010	463-57-0*1
Trioxidanide		-120.0	-123.1	± 1.6	kJ/mol	49.00669 ± 0.00090	89965-38-8*2
Acetyl chloride		-232.68	-241.55	± 0.33	kJ/mol	78.4973 ± 0.0019	75-36-5*0
Methyl formate		-344.73	-357.78	± 0.59	kJ/mol	60.0520 ± 0.0017	107-31-3*1
Chlorohydroxymethyl		-54.7	-60.7	± 1.1	kJ/mol	65.4787 ± 0.0012	147139-06-8*1
1,1-Dichloroethene		8.91	2.92	± 0.51	kJ/mol	96.9427 ± 0.0024	75-35-4*0
Tetrachloroethene		-22.3	-23.1	± 1.1	kJ/mol	165.8322 ± 0.0039	127-18-4*0
Difluorodichloromethane		-490.42	-495.18	± 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
Trifluoromethylium		409.16	406.09	± 0.52	kJ/mol	69.00536 ± 0.00080	18851-76-8*0
Fluoromethylene		210.16	210.50	± 0.72	kJ/mol	32.01704 ± 0.00080	13453-52-6*1
Formyl fluoride		-378.64	-382.23	± 0.33	kJ/mol	48.01644 ± 0.00086	1493-02-3*0
Methyl nitrite		-55.58	-67.36	± 0.45	kJ/mol	61.0401 ± 0.0010	624-91-9*2
Chlorine pentafluoride		-226.1	-234.2	± 1.7	kJ/mol	130.44472 ± 0.00090	13637-63-3*0
Chloro hypochlorite		79.78	77.97	± 0.36	kJ/mol	86.9048 ± 0.0018	7791-21-1*0
Chlorooxy hypochlorite		134.55	131.32	± 0.56	kJ/mol	102.9042 ± 0.0019	12292-23-8*0
Peroxyhypochlorous acid		3.93	-1.34	± 0.95	kJ/mol	68.4594 ± 0.0011	67952-07-2*0
Hypoiodite		-102.48	-104.29	± 0.88	kJ/mol	142.90442 ± 0.00030	15065-65-3*0
Dinitrogen cation		1503.311	1503.312	± 0.0011	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
Nitrogen sesquioxide		90.71	86.15	± 0.15	kJ/mol	76.01168 ± 0.00091	10544-73-7*0
Ammonium			-133.080	± 0.056	kJ/mol	18.03795 ± 0.00029	14798-03-9*800
Hydrazino		234.80	224.28	± 0.78	kJ/mol	31.03730 ± 0.00025	13598-46-4*0
Ethylidene		373.69	366.46	± 0.98	kJ/mol	28.0532 ± 0.0016	4218-50-2*2
Methylamidogen		187.21	176.56	± 0.49	kJ/mol	30.04920 ± 0.00085	15622-51-2*0
Hydrogen isocyanide cation		1353.0	1352.9	± 1.3	kJ/mol	27.02483 ± 0.00081	74158-11-5*0
Prop-2-ylium		822.90	805.64	± 0.25	kJ/mol	43.0871 ± 0.0024	19252-53-0*0
Propargylenide		434.5	437.1	± 1.1	kJ/mol	38.0485 ± 0.0024	82906-05-6*1
neo-Pentane		-134.69	-167.57	± 0.40	kJ/mol	72.1488 ± 0.0041	463-82-1*0
Dichloride		-229.8	-228.7	± 1.4	kJ/mol	70.9059 ± 0.0018	12595-89-0*0
2-Hydroxyethyl		-9.91	-22.54	± 0.91	kJ/mol	45.0605 ± 0.0017	4422-54-2*2
Chlorine atom cation		1370.806	1372.602	± 0.0011	kJ/mol	35.45215 ± 0.00090	24203-47-2*0
Dimethyl ether		-166.53	-184.04	± 0.45	kJ/mol	46.0684 ± 0.0017	115-10-6*0
Methanediol		-368.8	-382.0	± 1.2	kJ/mol	48.0413 ± 0.0010	463-57-0*2
(Methylamino)methyl		167.56	151.10	± 0.97	kJ/mol	44.0758 ± 0.0017	31277-24-4*0
Dimethylamidogen		173.7	156.3	± 1.5	kJ/mol	44.0758 ± 0.0017	15337-44-7*0
Bromotrichloromethane		-32.87	-42.01	± 0.60	kJ/mol	198.2728 ± 0.0030	75-62-7*0
Chloromethylidyne		430.42	434.18	± 0.67	kJ/mol	47.4634 ± 0.0012	3889-76-7*0
Chloromethanol		-232.1	-242.4	± 1.2	kJ/mol	66.4866 ± 0.0013	15454-33-8*0
Chloromethoxy		-11.7	-18.5	± 1.1	kJ/mol	65.4787 ± 0.0012	114282-89-2*0
1,1-Dichloroethane		-119.76	-132.54	± 0.51	kJ/mol	98.9586 ± 0.0024	75-34-3*0
1,1,1-Trichloroethane		-134.42	-145.00	± 0.52	kJ/mol	133.4033 ± 0.0031	71-55-6*0
Hydroperoxonium		738.1	727.8	± 1.2	kJ/mol	35.02207 ± 0.00064	70850-26-9*1
Tetraiodomethane		332.0	326.9	± 4.1	kJ/mol	519.62858 ± 0.00081	507-25-5*0
o-Benzyne		468.05	459.13	± 0.88	kJ/mol	76.0960 ± 0.0048	462-80-6*2
Benzyl		230.23	211.42	± 0.62	kJ/mol	91.1305 ± 0.0056	2154-56-5*0
Acetonyl		-19.17	-31.88	± 0.99	kJ/mol	57.0712 ± 0.0024	3122-07-4*0
Propionaldehyde		-171.40	-186.80	± 0.25	kJ/mol	58.0791 ± 0.0025	123-38-6*0
Bromonium		1257.778	1251.715	± 0.057	kJ/mol	79.90345 ± 0.00100	22541-56-6*0
Nitric acid			-206.63	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*800
Oxoammoniumyl		1092.40	1089.47	± 0.68	kJ/mol	31.01353 ± 0.00032	63559-87-5*0
Trioxidane		-72.39	-80.88	± 0.92	kJ/mol	50.01408 ± 0.00091	14699-99-1*2
Peroxynitrous acid		7.57	0.49	± 0.41	kJ/mol	63.01288 ± 0.00091	14691-52-2*1
Chlorodioxidanyl		103.91	102.82	± 0.37	kJ/mol	67.4515 ± 0.0011	17376-09-9*0
Ethylidyne		508.56	504.86	± 0.87	kJ/mol	27.0452 ± 0.0016	67624-57-1*0
Ethylidyne		640.6	636.1	± 1.2	kJ/mol	27.0452 ± 0.0016	67624-57-1*2
Methylamidogen anion		144.95	134.12	± 0.68	kJ/mol	30.04975 ± 0.00085	54448-39-4*0
Iminomethyl cation		953.3	949.3	± 1.4	kJ/mol	28.03277 ± 0.00082	196216-36-1*0
Fluoronium		774.10	771.16	± 0.88	kJ/mol	21.01373 ± 0.00014	12206-67-6*2
Perchloryl		191.68	186.01	± 0.61	kJ/mol	83.4509 ± 0.0013	13932-10-0*0
1-Propenyl		277.99	267.20	± 0.79	kJ/mol	41.0718 ± 0.0024	6067-68-1*2
Hydrogen fluoride			-321.03	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*818
1-Propynyl		528.39	526.03	± 0.75	kJ/mol	39.0559 ± 0.0024	89342-91-6*0
Propargylenide		437.0	439.5	± 1.1	kJ/mol	38.0485 ± 0.0024	82906-05-6*2
2-Propyn-1-ylium-1-ylidene		1598.0	1602.9	± 1.3	kJ/mol	37.0395 ± 0.0024	75104-46-0*0
t-Butyl		75.44	50.14	± 0.68	kJ/mol	57.1143 ± 0.0033	1605-73-8*0
2-Butyne		158.96	145.99	± 0.59	kJ/mol	54.0904 ± 0.0032	503-17-3*0
1-Butyne		179.36	165.77	± 0.67	kJ/mol	54.0904 ± 0.0032	107-00-6*0
iso-Pentane		-119.26	-153.31	± 0.44	kJ/mol	72.1488 ± 0.0041	78-78-4*0
Isoprene		95.97	75.44	± 0.70	kJ/mol	68.1170 ± 0.0040	78-79-5*0
2-Hydroxyethyl		-4.9	-17.4	± 1.3	kJ/mol	45.0605 ± 0.0017	4422-54-2*3
Vinoxy		22.42	15.58	± 0.77	kJ/mol	43.0446 ± 0.0016	6912-06-7*0
Acetyl anion		-44.0	-49.6	± 1.4	kJ/mol	43.0452 ± 0.0016	78944-68-0*0
Ketene		182.5	177.5	± 1.3	kJ/mol	42.0367 ± 0.0016	463-51-4*1
Water dimer		-491.097	-499.137	± 0.052	kJ/mol	36.03056 ± 0.00066	25655-83-8*0
Hydroxyformyl		-174.34	-177.37	± 0.53	kJ/mol	45.0174 ± 0.0010	2564-86-5*2
Hydroxyformyl anion		-319.50	-322.27	± 0.60	kJ/mol	45.0180 ± 0.0010	78944-70-4*2
2-Hydrotrioxy		299.7	294.0	± 1.2	kJ/mol	49.00614 ± 0.00090	12500-78-60
1-Propanol		-231.44	-255.28	± 0.25	kJ/mol	60.0950 ± 0.0025	71-23-8*0
(Dimethylamino)methyl		165.1	142.0	± 1.4	kJ/mol	58.1024 ± 0.0025	30208-47-0*0
Chloromethide		56.5	53.3	± 2.0	kJ/mol	49.4798 ± 0.0012	60291-29-4*0
cis-1,2-Dichloroethene	$C(\Cl)=C\Cl$	3.46	-2.54	± 0.56	kJ/mol	96.9427 ± 0.0024	156-59-2*0
Fluorotrichloromethane		-286.4	-289.6	± 1.2	kJ/mol	137.3672 ± 0.0028	75-69-4*0
Difluoromethylene		-193.94	-193.47	± 0.39	kJ/mol	50.00751 ± 0.00080	2154-59-8*0
Hexafluoroethane		-1334.5	-1342.8	± 1.5	kJ/mol	138.0118 ± 0.0016	76-16-4*0
1,1-Difluoroethane		-489.06	-502.78	± 0.65	kJ/mol	66.0500 ± 0.0016	75-37-6*0
1,1-Difluoroethene		-343.60	-350.66	± 0.94	kJ/mol	64.0341 ± 0.0016	75-38-7*0
Tricarbon dioxide		-94.8	-92.7	± 1.4	kJ/mol	68.0309 ± 0.0025	504-64-3*0
Ethylbenzene		58.18	29.72	± 0.55	kJ/mol	106.1650 ± 0.0064	100-41-4*0
Phenylethene		169.66	148.33	± 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
Difluoride		-291.0	-290.2	± 1.5	kJ/mol	37.9973550 ± 0.0000010	12184-85-9*0
Acetonate		-188.5	-202.1	± 1.1	kJ/mol	57.0717 ± 0.0024	24262-31-5*0
Bromine monochloride		21.882	14.439	± 0.060	kJ/mol	115.3567 ± 0.0013	13863-41-7*0
Iodine monobromide		49.718	40.771	± 0.067	kJ/mol	206.8085 ± 0.0010	7789-33-5*0
Nitrosyl nitrite		93.0	87.8	± 1.3	kJ/mol	76.01168 ± 0.00091	122413-35-8*1
Nitroxyl		79.38	74.13	± 0.19	kJ/mol	62.00494 ± 0.00090	12033-49-7*0
Isodiazene		307.52	300.44	± 0.75	kJ/mol	30.02936 ± 0.00020	28647-38-3*0
Nitryl hydride		-37.2	-44.1	± 1.5	kJ/mol	47.01348 ± 0.00061	90266-90-3*0
Carbon atom cation		1797.860	1803.458	± 0.048	kJ/mol	12.01015 ± 0.00080	14067-05-1*0
Dioxygen anion		-43.36	-42.72	± 0.17	kJ/mol	31.99935 ± 0.00060	11062-77-4*0
Methanide		141.08	137.63	± 0.30	kJ/mol	15.03507 ± 0.00083	15194-58-8*0
Methyliumyl		1393.17	1394.03	± 0.12	kJ/mol	14.02603 ± 0.00081	15091-72-2*0
Methyliumylidene		1619.765	1623.108	± 0.056	kJ/mol	13.01809 ± 0.00080	24361-82-8*0
Methylidyne anion		474.97	478.30	± 0.85	kJ/mol	13.01919 ± 0.00080	28604-54-8*0
Trioxygen difluoride		112.5	106.7	± 1.2	kJ/mol	85.99501 ± 0.00090	16829-28-0*1
Ethanide		152.9	141.8	± 1.2	kJ/mol	29.0616 ± 0.0016	25013-41-6*0
Oxidanylium		1293.182	1293.211	± 0.035	kJ/mol	17.00679 ± 0.00031	12259-29-9*0
Methyleneamidogen		241.95	238.30	± 0.67	kJ/mol	28.03332 ± 0.00082	15845-29-1*0
(E)-Iminomethyl		275.83	272.22	± 0.71	kJ/mol	28.03332 ± 0.00082	54980-10-8*0
Nitrilomethylium		1778.0	1781.5	± 1.2	kJ/mol	26.01689 ± 0.00080	12539-57-0*0
Fluoroacetylene		104.89	105.60	± 0.41	kJ/mol	44.0277 ± 0.0016	2713-09-9*0
Methanol cation		856.90	846.58	± 0.32	kJ/mol	32.04131 ± 0.00090	12538-91-9*0
Methyloxonium		589.8	575.6	± 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
Hydroxyde			-230.020	± 0.029	kJ/mol	17.00789 ± 0.00031	14280-30-9*800
Carbonic acid		-596.87	-606.98	± 0.85	kJ/mol	62.0248 ± 0.0012	463-79-6*2
Carbonic acid		-561.64	-570.49	± 0.98	kJ/mol	62.0248 ± 0.0012	463-79-6*3
1,2-Propadienyl anion		265.65	262.44	± 0.73	kJ/mol	39.0565 ± 0.0024	64066-06-4*0
1-Propynyl anion		264.45	260.98	± 0.76	kJ/mol	39.0565 ± 0.0024	36147-87-2*0
Chloric acid		2.2	-4.9	± 1.6	kJ/mol	84.4588 ± 0.0013	7790-93-4*0
Chlorate		-207.4	-212.9	± 1.6	kJ/mol	83.4514 ± 0.0013	14866-68-3*0
Hypochloroperoxoous acid, hydroxy ester		49.2	42.2	± 1.9	kJ/mol	84.4588 ± 0.0013	928652-99-7*1
Cyclohexane		-83.64	-123.20	± 0.36	kJ/mol	84.1595 ± 0.0049	110-82-7*0
Ozonide		-58.48	-60.84	± 0.21	kJ/mol	47.99875 ± 0.00090	12596-80-4*0
2-Hydroxyethylium		1019.2	1006.3	± 1.7	kJ/mol	45.0600 ± 0.0017	38607-31-7*3
Ethynol		95.3	93.2	± 1.5	kJ/mol	42.0367 ± 0.0016	32038-79-2*0
Hydroxyformyl anion		-313.69	-315.63	± 0.61	kJ/mol	45.0180 ± 0.0010	78944-70-4*1
2-Propanol		-248.87	-272.97	± 0.32	kJ/mol	60.0950 ± 0.0025	67-63-0*0
Acetic acid		-418.51	-432.63	± 0.52	kJ/mol	60.0520 ± 0.0017	64-19-7*1
Ethylene glycol		-369.81	-389.44	± 0.49	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
Dichloromethyl		92.02	90.11	± 0.88	kJ/mol	83.9240 ± 0.0020	3474-12-2*0
Chloromethyl		118.47	115.39	± 0.87	kJ/mol	49.4793 ± 0.0012	6806-86-6*0
Methyl hypochlorite		-52.9	-62.9	± 1.4	kJ/mol	66.4866 ± 0.0013	593-78-2*0
1,2-Dichloroethane		-118.48	-130.43	± 0.54	kJ/mol	98.9586 ± 0.0024	107-06-2*0
Dichloroacetylene		230.08	233.39	± 0.98	kJ/mol	94.9268 ± 0.0024	7572-29-4*0
Fluorochloromethane		-256.3	-263.5	± 1.3	kJ/mol	68.4777 ± 0.0012	593-70-4*0
Trioxidanyl		25.31	23.32	± 0.13	kJ/mol	49.00614 ± 0.00090	12500-78-6*1
Formyl chloride		-179.97	-183.18	± 0.77	kJ/mol	64.4707 ± 0.0012	2565-30-2*0
Chloroformyl		-21.91	-20.52	± 0.49	kJ/mol	63.4628 ± 0.0012	2602-42-8*0
1,3-Butadiyne		458.35	460.07	± 0.82	kJ/mol	50.0587 ± 0.0032	460-12-8*0
o-Benzyne anion		413.73	404.63	± 0.97	kJ/mol	76.0965 ± 0.0048	100569-88-8*0
Oxygen atom		436.666	438.523	± 0.0021	kJ/mol	15.99940 ± 0.00030	17778-80-2*2
Benzylide		142.01	123.10	± 0.45	kJ/mol	91.1310 ± 0.0056	18860-15-6*0
Fluorobenzene cation		788.88	773.86	± 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		138.8	129.4	± 1.2	kJ/mol	60.0321 ± 0.0010	16787-85-2*0
Hydrogen chloride			-165.759	± 0.025	kJ/mol	36.46064 ± 0.00090	7647-01-0*828
Dinitrogen pentoxide		24.41	14.84	± 0.35	kJ/mol	108.0105 ± 0.0015	10102-03-1*0
Fluoride			-334.48	± 0.16	kJ/mol	18.99895178 ± 0.00000050	16984-48-8*800
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		54.450	52.548	± 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		1150.83	1144.45	± 0.25	kJ/mol	16.04191 ± 0.00085	20741-88-2*0
Methylene anion		328.49	328.92	± 0.50	kJ/mol	14.02713 ± 0.00081	50928-07-9*0
Oxoniumyl ion		978.464	975.561	± 0.029	kJ/mol	18.01473 ± 0.00033	56583-62-1*0
Ethanium		874.39	858.15	± 0.62	kJ/mol	31.0764 ± 0.0017	24669-33-8*0
Acetylene cation		1328.84	1328.18	± 0.13	kJ/mol	26.0367 ± 0.0016	25641-79-6*0
Vinylidene		411.25	412.17	± 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		456.4	452.4	± 1.4	kJ/mol	27.0458 ± 0.0016	117768-70-4*0
Vinylidene anion		364.14	363.96	± 0.63	kJ/mol	26.0378 ± 0.0016	66295-36-1*0
Ethynylium		1687.59	1690.92	± 0.16	kJ/mol	25.0288 ± 0.0016	16456-59-0*0
Methyloxoniumylidene		1062.29	1054.48	± 0.75	kJ/mol	31.03337 ± 0.00088	58157-09-8*0
Hydroxymethylene		131.12	127.38	± 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
Iodide			-56.824	± 0.089	kJ/mol	126.905019 ± 0.000030	20461-54-5*800
Isoformyl		217.29	217.67	± 0.69	kJ/mol	29.01804 ± 0.00086	71080-92-7*0
1-Propenyl		280.03	269.22	± 0.81	kJ/mol	41.0718 ± 0.0024	6067-68-1*1
Cyclopropene		292.34	283.61	± 0.55	kJ/mol	40.0639 ± 0.0024	2781-85-3*0
Dioxidenium		1110.87	1107.98	± 0.11	kJ/mol	33.00619 ± 0.00060	12207-52-2*0
Bifluoride		-481.8	-480.6	± 1.9	kJ/mol	39.005295 ± 0.000070	18130-74-02
Chloryl hydride		197.6	191.2	± 1.6	kJ/mol	68.4594 ± 0.0011	174365-32-3*0
Water anion		31.3	29.8	± 3.1	kJ/mol	18.01583 ± 0.00033	12259-30-2*100
Hydrogen fluoride			-321.08	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*820
Cyclobutane		52.35	27.82	± 0.41	kJ/mol	56.1063 ± 0.0032	287-23-0*0
Hydrogen difluoride		-198.5	-198.4	± 1.2	kJ/mol	39.004746 ± 0.000070	12528-21-1*1
n-Heptane		-145.71	-187.58	± 0.48	kJ/mol	100.2019 ± 0.0057	142-82-5*0
n-Octane		-161.46	-208.29	± 0.67	kJ/mol	114.2285 ± 0.0065	111-65-9*0
1-Hydroxyethylium		611.1	596.6	± 1.3	kJ/mol	45.0600 ± 0.0017	18682-96-7*2
Ethenol		-108.24	-119.04	± 0.89	kJ/mol	44.0526 ± 0.0017	557-75-5*2
Vinyl alcohol cation		778.9	767.6	± 1.4	kJ/mol	44.0520 ± 0.0017	57239-63-1*2
Oxiranyl		172.7	164.4	± 1.4	kJ/mol	43.0446 ± 0.0016	31586-84-2*0
Oxiranylium		901.5	893.5	± 1.4	kJ/mol	43.0441 ± 0.0016	57789-76-1*2
C=O=C		652.9	657.2	± 2.3	kJ/mol	40.0208 ± 0.0016	12071-23-71
C=O=C		720.0	724.3	± 1.9	kJ/mol	40.0208 ± 0.0016	12071-23-72
Oxirene		272.85	272.15	± 0.98	kJ/mol	42.0367 ± 0.0016	157-18-6*2
Oxirene		388.7	384.5	± 2.6	kJ/mol	42.0367 ± 0.0016	157-18-6*11
Formic acid cation		721.92	714.83	± 0.26	kJ/mol	46.0248 ± 0.0010	50614-05-6*1
Dioxirane		9.45	1.78	± 0.55	kJ/mol	46.0254 ± 0.0010	157-26-6*0
Formyloxidanyl		-121.76	-125.11	± 0.56	kJ/mol	45.0174 ± 0.0010	16499-21-1*2
Isofulminic acid		170.92	169.46	± 0.49	kJ/mol	43.02478 ± 0.00086	51060-05-0*0
Methyl formate		-324.7	-337.2	± 1.9	kJ/mol	60.0520 ± 0.0017	107-31-3*2
Dimethylamide		122.2	103.8	± 1.7	kJ/mol	44.0763 ± 0.0017	34285-60-4*0
Chlorine difluoride		-47.1	-48.2	± 1.4	kJ/mol	73.44951 ± 0.00090	24801-48-7*0
Hexachloroethane		-147.4	-149.8	± 1.6	kJ/mol	236.7376 ± 0.0056	67-72-1*0
1,1,2-Trichloroethane		-136.5	-148.2	± 1.4	kJ/mol	133.4033 ± 0.0031	79-00-5*0
Methyl iodide			-12.28	± 0.20	kJ/mol	141.93899 ± 0.00083	74-88-4*590
Difluoromethylene		43.25	43.97	± 0.39	kJ/mol	50.00751 ± 0.00080	2154-59-8*1
Difluoromethylene		-193.94	-193.47	± 0.39	kJ/mol	50.00751 ± 0.00080	2154-59-8*2
Bromide			-120.71	± 0.16	kJ/mol	79.90455 ± 0.00100	24959-67-9*800
Ethyl iodide		-9.42	-39.29	± 0.49	kJ/mol	155.9656 ± 0.0016	75-03-6*500
Fluoro(fluorooxy)methylene		-135.8	-137.0	± 2.1	kJ/mol	66.00691 ± 0.00085	479587-30-9*2
Azide ion		193.51	189.93	± 0.91	kJ/mol	42.02077 ± 0.00021	14343-69-2*0
Dibromophosgene		-97.96	-113.89	± 0.37	kJ/mol	187.8181 ± 0.0022	593-95-3*0
Oxygen atom		246.844	249.229	± 0.0021	kJ/mol	15.99940 ± 0.00030	17778-80-2*1
Benzene		50.68	49.13	± 0.23	kJ/mol	78.1118 ± 0.0048	71-43-2*500
o-Benzyne		468.05	459.13	± 0.88	kJ/mol	76.0960 ± 0.0048	462-80-6*0
m-Benzyne		527.0	518.5	± 1.2	kJ/mol	76.0960 ± 0.0048	1828-89-3*2
p-Benzyne		587.1	577.5	± 1.2	kJ/mol	76.0960 ± 0.0048	3355-34-8*2
Phenoxy		71.37	56.08	± 0.94	kJ/mol	93.1033 ± 0.0048	2122-46-5*0
Benzoyl fluoride		-288.0	-304.4	± 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
1H-Triazirin-1-yl		585.9	584.1	± 2.0	kJ/mol	42.02022 ± 0.00021	912535-95-6*0
(E)-Diazene cation		1132.46	1125.53	± 0.66	kJ/mol	30.02881 ± 0.00020	59952-06-6*0
(Z)-Diazene	$[H]/N=N\[H]$	228.81	221.67	± 0.64	kJ/mol	30.02936 ± 0.00020	15626-42-3*0
Hydroxyaminiumyl		1160.8	1157.9	± 1.5	kJ/mol	31.01353 ± 0.00032	63559-88-6*0
Hydroxyamidogen		123.6	117.0	± 1.7	kJ/mol	32.02202 ± 0.00034	13940-32-4*2
Hydroxyaminylium		1019.6	1012.5	± 2.5	kJ/mol	32.02147 ± 0.00034	66097-71-0*1
Dioxyamidogen		240.4	233.7	± 1.8	kJ/mol	47.01348 ± 0.00061	71843-95-3*2
Peroxynitrous acid		-0.43	-7.48	± 0.53	kJ/mol	63.01288 ± 0.00091	14691-52-2*2
Chlorosyl hydride		141.9	139.1	± 1.7	kJ/mol	52.46004 ± 0.00095	71572-35-5*0
Bifluoride		-68.0	-67.6	± 1.6	kJ/mol	39.005295 ± 0.000070	18130-74-01
Dioxiranylidene		190.3	191.1	± 1.4	kJ/mol	44.00950 ± 0.00100	138832-57-2*0
Methylidyne		592.81	596.15	± 0.11	kJ/mol	13.01864 ± 0.00080	3315-37-5*1
Aquachlorine cation		821.8	815.0	± 1.7	kJ/mol	53.46743 ± 0.00096	142599-65-3*0
Ethylidyne		508.56	504.86	± 0.87	kJ/mol	27.0452 ± 0.0016	67624-57-1*1
Trioxidaniumyl		925.7	916.4	± 1.5	kJ/mol	50.01353 ± 0.00091	161321-37-5*2
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		192.72	188.97	± 0.96	kJ/mol	28.03387 ± 0.00082	28892-56-0*0
(Z)-Iminomethyl		294.51	291.02	± 0.92	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
Hydrogen isocyanide		192.02	192.40	± 0.38	kJ/mol	27.02538 ± 0.00081	6914-07-4*0
Chloroacetylene		228.04	228.90	± 0.77	kJ/mol	60.4820 ± 0.0018	593-63-5*0
Methyleneoxonium		152.49	144.17	± 0.49	kJ/mol	32.04186 ± 0.00090	177788-17-9*0
Hydroxymethylene anion		147.2	144.1	± 1.6	kJ/mol	30.02653 ± 0.00087	207914-87-2*1
Iodine atom cation		1115.549	1115.149	± 0.0062	kJ/mol	126.903921 ± 0.000030	22541-93-1*0
Hydroxymethyliumylidene		986.04	987.68	± 0.83	kJ/mol	29.01749 ± 0.00086	60528-75-8*0
Isoformyl anion		55.8	58.4	± 1.8	kJ/mol	29.01859 ± 0.00086	81747-63-9*1
Propylium		856.94	838.72	± 0.93	kJ/mol	43.0871 ± 0.0024	19252-52-9*0
Oxywater		64.8	58.2	± 1.3	kJ/mol	34.01468 ± 0.00062	171363-09-0*0
Cyclopropyl		302.7	290.0	± 1.6	kJ/mol	41.0718 ± 0.0024	2417-82-5*0
Trioxodinitrate anion		-104.9	-108.8	± 2.4	kJ/mol	76.01223 ± 0.00091	194856-62-7*100
Cycloprop-1-enyl		527.56	522.98	± 0.69	kJ/mol	39.0559 ± 0.0024	19528-44-0*0
Cycloprop-2-enyl		490.27	485.66	± 0.64	kJ/mol	39.0559 ± 0.0024	28933-84-8*0
Cyclopropenylidene		497.07	496.11	± 0.46	kJ/mol	38.0480 ± 0.0024	16165-40-5*0
Triiodide ion			-51.37	± 0.80	kJ/mol	380.713959 ± 0.000090	14900-04-0*800
2-Propynylidyne anion		539.96	544.81	± 0.84	kJ/mol	37.0406 ± 0.0024	82893-67-2*0
Cyclopropynyl		710.7	714.8	± 1.1	kJ/mol	37.0400 ± 0.0024	119178-99-3*0
Oxygen cation monohydrate		1153.0	1147.5	± 3.3	kJ/mol	34.01413 ± 0.00062	31748-17-10
sec-Butyl		90.19	65.42	± 0.98	kJ/mol	57.1143 ± 0.0033	2348-55-2*0
t-Butylium		733.77	710.50	± 0.98	kJ/mol	57.1137 ± 0.0033	14804-25-2*0
iso-Butyl		97.01	73.02	± 0.77	kJ/mol	57.1143 ± 0.0033	4630-45-9*0
Methylcyclopropane		47.6	24.3	± 1.3	kJ/mol	56.1063 ± 0.0032	594-11-6*0
Dihydrogen fluoride anion		133.2	131.9	± 1.6	kJ/mol	21.01483 ± 0.00014	117339-92-1*1
Cyclobutene		176.79	159.74	± 0.92	kJ/mol	54.0904 ± 0.0032	822-35-5*0
Peroxychlorous acid		96.2	90.2	± 2.1	kJ/mol	84.4588 ± 0.0013	177778-92-6*1
Chlorine fluoride cation		1165.52	1165.70	± 0.49	kJ/mol	54.45055 ± 0.00090	12432-44-9*0
Vinyl alcohol cation		787.1	775.9	± 1.1	kJ/mol	44.0520 ± 0.0017	57239-63-1*1
Vinoxy cation		1020.1	1013.1	± 1.6	kJ/mol	43.0441 ± 0.0016	35731-40-91
Vinoxide		-153.58	-160.63	± 0.77	kJ/mol	43.0452 ± 0.0016	35731-40-9*0
Dinitrogen tetraoxide		20.14	10.85	± 0.14	kJ/mol	92.0111 ± 0.0012	10544-72-6*0
Hydrogen fluoride			-321.12	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*821
Perchloric acid		13.2	1.8	± 1.8	kJ/mol	100.4582 ± 0.0015	7601-90-3*0
Acetic acid			-485.20	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*800
COC vdW		589.3	598.1	± 1.9	kJ/mol	40.0208 ± 0.0016	12071-24-81
Oxirene		390.8	386.6	± 2.7	kJ/mol	42.0367 ± 0.0016	157-18-6*12
Methylperoxy anion		-89.81	-99.96	± 0.68	kJ/mol	47.0339 ± 0.0010	35683-44-4*0
Fluorohydrochlorine cation		975.3	972.3	± 2.0	kJ/mol	55.45849 ± 0.00090	70110-64-4*0
Formyloxoniumylidene		1017.3	1013.8	± 1.4	kJ/mol	45.0169 ± 0.0010	54375-27-8*0
Dioxymethylene		364.0	361.6	± 2.7	kJ/mol	45.0174 ± 0.0010	438586-67-5*1
2-Hydrotrioxy cation		1297.9	1291.3	± 1.5	kJ/mol	49.00559 ± 0.00090	74241-49-90
Cyanic acid		-12.20	-14.91	± 0.49	kJ/mol	43.02478 ± 0.00086	420-05-3*0
Fulminic acid		235.38	233.68	± 0.48	kJ/mol	43.02478 ± 0.00086	506-85-4*0
Isocyanate		-221.09	-221.31	± 0.54	kJ/mol	42.01739 ± 0.00086	71000-82-3*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
Dimethylmethyleneammonium		695.9	670.8	± 1.4	kJ/mol	58.1018 ± 0.0025	28149-27-1*0
Isocyanogen		410.8	413.1	± 1.7	kJ/mol	52.0349 ± 0.0016	83951-85-3*0
Diisocyanogen		610.2	613.1	± 1.8	kJ/mol	52.0349 ± 0.0016	78800-21-2*0
Cyanoamidogen		325.0	322.6	± 1.8	kJ/mol	41.03212 ± 0.00082	12347-01-2*0
Trichloromethide		-125.0	-124.4	± 2.0	kJ/mol	118.3693 ± 0.0028	14478-07-0*0
Oxygen anion monohydrate		-239.1	-244.4	± 3.0	kJ/mol	34.01523 ± 0.00062	31748-17-1*0
Deuterium atom		219.804	221.717	± 0.000	kJ/mol	2.01410177800 ± 0.00000000040	16873-17-9*0
Chlorine difluoride cation		998.9	996.7	± 1.7	kJ/mol	73.44896 ± 0.00090	32629-46-2*0
Trichloroethene		-10.8	-14.1	± 1.6	kJ/mol	131.3874 ± 0.0031	79-01-6*0
2-Hydrotrioxy anion		27.5	21.8	± 1.4	kJ/mol	49.00669 ± 0.00090	89965-38-80
Bromodichloromethane		-37.6	-49.3	± 1.3	kJ/mol	163.8280 ± 0.0022	75-27-4*0
Difluorodibromomethane		-366.0	-383.7	± 1.4	kJ/mol	209.8155 ± 0.0022	75-61-6*0
Dichlorodibromomethane		20.7	5.0	± 1.5	kJ/mol	242.7241 ± 0.0028	594-18-3*0
Bromodifluoromethane		-410.85	-424.05	± 0.49	kJ/mol	130.9194 ± 0.0013	1511-62-2*0
Oxofluoronium		1342.64	1342.59	± 0.81	kJ/mol	34.99725 ± 0.00030	12763-67-6*0
1,2-Difluoroethane		-434.44	-447.87	± 0.86	kJ/mol	66.0500 ± 0.0016	624-72-6*0
1,2-Difluoroacetylene		2.77	5.59	± 0.66	kJ/mol	62.0182 ± 0.0016	689-99-6*0
Fluoro(fluorooxy)methylene		-38.8	-40.4	± 2.1	kJ/mol	66.00691 ± 0.00085	479587-30-9*1
Phenylium		1251.1	1238.0	± 1.9	kJ/mol	77.1034 ± 0.0048	17333-73-2*1
Hydrogen difluoride cation		1174.3	1171.3	± 1.5	kJ/mol	39.004198 ± 0.000070	126950-54-70
Chlorobenzene cation		942.46	928.54	± 0.61	kJ/mol	112.5561 ± 0.0049	55450-32-3*0
Chlorobenzene			11.21	± 0.59	kJ/mol	112.5566 ± 0.0049	108-90-7*500
Bromobenzene cation		994.7	973.2	± 1.3	kJ/mol	157.0074 ± 0.0049	55450-33-4*0
Iodobenzene		112.8	112.9	± 1.1	kJ/mol	204.0084 ± 0.0048	591-50-4*500
Nitrobenzene		81.5	61.5	± 1.4	kJ/mol	123.1094 ± 0.0049	98-95-3*0
Chlorine chlorite		168.6	166.2	± 1.3	kJ/mol	102.9042 ± 0.0019	105206-44-8*3
Methyl nitrite		-55.58	-66.25	± 0.45	kJ/mol	61.0401 ± 0.0010	624-91-9*0
Carbon atom anion		589.631	594.777	± 0.049	kJ/mol	12.01125 ± 0.00080	14337-00-9*0
Dioxymethylidyne		299.8	301.1	± 1.7	kJ/mol	44.00950 ± 0.00100	791121-04-5*0
Nitronium		961.78	958.22	± 0.20	kJ/mol	46.00499 ± 0.00060	14522-82-8*0
Trifluoromethide		-637.7	-639.5	± 1.8	kJ/mol	69.00646 ± 0.00080	54128-17-5*0
2-Cyclopropyn-1-ylidene		899.2	906.1	± 1.6	kJ/mol	36.0321 ± 0.0024	102508-15-6*1
Propynylidyne cation		1947.0	1954.9	± 2.0	kJ/mol	36.0316 ± 0.0024	154702-35-9*0
Dioxaziridinyl		355.1	352.6	± 1.5	kJ/mol	46.00554 ± 0.00060	66252-29-7*0
Hydrogen fluoride			-321.14	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*822
Bromo hypobromite		120.1	103.7	± 1.4	kJ/mol	175.8074 ± 0.0020	21308-80-5*0
Ethylene cation		1075.22	1068.01	± 0.12	kJ/mol	28.0526 ± 0.0016	34470-02-5*0
Peroxyimidogen		405.4	403.4	± 1.9	kJ/mol	46.00554 ± 0.00060	60488-31-50
Chlorosyl ion		1150.85	1150.69	± 0.66	kJ/mol	51.45155 ± 0.00095	12301-79-0*0
Hydrogen fluoride			-321.10	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*904
Iminomethyl anion		237.4	233.6	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*1
Fluoronium		774.10	771.16	± 0.88	kJ/mol	21.01373 ± 0.00014	12206-67-6*0
Cyanogen iodide anion		86.5	88.8	± 8.1	kJ/mol	152.92246 ± 0.00080	1356929-44-6*0
Oxadiazirine		351.7	349.8	± 1.7	kJ/mol	44.01288 ± 0.00033	227934-45-4*0
Formaldehyde cation		944.89	941.27	± 0.10	kJ/mol	30.02543 ± 0.00087	54288-05-0*0
Iodine atom		107.157	106.757	± 0.0021	kJ/mol	126.904470 ± 0.000030	14362-44-8*1
NON		545.5	542.3	± 1.7	kJ/mol	44.01288 ± 0.00033	227934-46-5*0
Isoformyl anion		267.4	268.0	± 1.6	kJ/mol	29.01859 ± 0.00086	81747-63-9*2
Fluoronium		1490.1	1491.5	± 1.9	kJ/mol	21.01373 ± 0.00014	12206-67-6*1
Azidonitrene		692.1	687.5	± 1.4	kJ/mol	56.02696 ± 0.00028	147363-92-6*2
Dioxygenyl ion monohydrate		828.7	821.6	± 2.1	kJ/mol	50.01353 ± 0.00091	11083-61-7*0
Diazenide		175.7	176.7	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*100
Chlorite		-105.62	-107.80	± 0.35	kJ/mol	67.4520 ± 0.0011	14998-27-7*0
2-Propynylium		1193.46	1190.65	± 0.38	kJ/mol	39.0554 ± 0.0024	21540-27-2*0
2-Cyclopropen-1-ylium-1-yl		1382.0	1381.0	± 1.1	kJ/mol	38.0474 ± 0.0024	85398-75-0*0
Dihydrogen fluoride anion		-257.0	-260.1	± 1.9	kJ/mol	21.01483 ± 0.00014	117339-92-12
Propynylidene		597.6	599.3	± 1.2	kJ/mol	38.0480 ± 0.0024	67152-18-5*3
Propenediylidene		796.3	797.4	± 1.3	kJ/mol	38.0480 ± 0.0024	60731-11-5*0
Cyclopentene		58.09	33.82	± 0.45	kJ/mol	68.1170 ± 0.0040	142-29-0*0
Ethyloxoniumyl		783.6	766.5	± 1.7	kJ/mol	46.0679 ± 0.0017	34480-55-2*0
1-Hydroxyethylium		609.13	594.70	± 0.39	kJ/mol	45.0600 ± 0.0017	18682-96-7*0
Hydrogen difluoride		-187.4	-187.1	± 1.6	kJ/mol	39.004746 ± 0.000070	12528-21-1*2
Peroxychlorite		-34.3	-34.2	± 2.0	kJ/mol	83.4514 ± 0.0013	852472-63-0*0
Trihydrogen dioxide anion		-487.5	-495.8	± 1.1	kJ/mol	35.02317 ± 0.00064	12501-19-8*0
1-Chloro ozone		226.3	223.1	± 2.3	kJ/mol	83.4509 ± 0.0013	141801-66-3*101
Acetaldehyde cation		832.03	822.05	± 0.28	kJ/mol	44.0520 ± 0.0017	36505-03-0*0
Oxiranylium		1233.6	1226.6	± 1.8	kJ/mol	43.0441 ± 0.0016	57789-76-1*1
Oxiranyl anion		121.3	113.2	± 1.6	kJ/mol	43.0452 ± 0.0016	72722-59-9*0
Ketene		-45.37	-48.49	± 0.13	kJ/mol	42.0367 ± 0.0016	463-51-4*2
Fluorochlorate		-256.03	-255.43	± 0.81	kJ/mol	54.45165 ± 0.00090	12272-56-9*0
Ethynol anion		-48.51	-47.26	± 0.89	kJ/mol	41.0293 ± 0.0016	64066-01-9*0
Dicarbon monoxide anion		154.4	158.0	± 1.1	kJ/mol	40.0213 ± 0.0016	87191-88-6*0
Dicarbon monoxide		440.4	444.7	± 1.1	kJ/mol	40.0208 ± 0.0016	12071-23-7*2
COC vdW		725.2	733.5	± 2.0	kJ/mol	40.0208 ± 0.0016	12071-24-82
C=O-C cation		1575.8	1582.9	± 2.4	kJ/mol	40.0203 ± 0.0016	83483-98-1*1
C=O=C anion		549.8	553.5	± 2.2	kJ/mol	40.0213 ± 0.0016	87191-88-60
Hydroxyimidogen		217.93	215.04	± 0.90	kJ/mol	31.01408 ± 0.00032	35337-59-8*0
Formic acid cation		723.8	716.7	± 1.2	kJ/mol	46.0248 ± 0.0010	50614-05-6*2
Formic acid anion		-256.2	-262.3	± 1.8	kJ/mol	46.0259 ± 0.0010	19066-82-1*1
Nitrous acid		-71.39	-77.74	± 0.29	kJ/mol	47.01348 ± 0.00061	7782-77-6*2
OH-CO vdW complex		-80.31	-77.42	± 0.96	kJ/mol	45.0174 ± 0.0010	2564-85-4100
CO-HO vdW complex		-77.6	-73.6	± 1.8	kJ/mol	45.0174 ± 0.0010	2564-84-3100
H-CO2 vdW complex		-179.3	-178.3	± 2.2	kJ/mol	45.0174 ± 0.0010	2564-83-2100
Dibromide		-199.2	-213.3	± 2.0	kJ/mol	159.8085 ± 0.0020	12595-70-9*0
Isocyanic acid cation		1003.04	1000.38	± 0.51	kJ/mol	43.02423 ± 0.00086	444010-28-0*0
Isofulminic acid cation		1215.8	1213.0	± 1.3	kJ/mol	43.02423 ± 0.00086	114766-65-3*0
Acetic acid			-484.93	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*840
Dioxygen		94.410	94.383	± 0.000	kJ/mol	31.99880 ± 0.00060	7782-44-7*2
Acetyl chloride			-272.22	± 0.33	kJ/mol	78.4973 ± 0.0019	75-36-5*500
Chlorohydrofluorine cation		1000.8	998.1	± 2.1	kJ/mol	55.45849 ± 0.00090	70110-63-3*0
(Formyloxy)methyl		-148.7	-156.9	± 1.7	kJ/mol	59.0440 ± 0.0017	3122-12-1*1
Glyoxal		-206.91	-212.55	± 0.52	kJ/mol	58.0361 ± 0.0017	107-22-2*1
Chloride			-166.993	± 0.023	kJ/mol	35.45325 ± 0.00090	16887-00-6*800
Diazoethenylidene		657.0	659.6	± 3.0	kJ/mol	52.0349 ± 0.0016	130760-10-0*0
Isocyanomethylidyne		671.3	675.7	± 3.6	kJ/mol	38.0281 ± 0.0016	53590-27-5*0
Fluorosyl fluoride		192.6	193.1	± 2.3	kJ/mol	53.99621 ± 0.00030	86825-57-2*1
Diazomethyl		472.9	470.4	± 2.0	kJ/mol	41.03212 ± 0.00082	20813-32-5*0
Isocyanoamidogen		492.8	490.8	± 2.0	kJ/mol	41.03212 ± 0.00082	947408-73-3*0
Tetrachloromethane		-108.76	-128.17	± 0.45	kJ/mol	153.8215 ± 0.0037	56-23-5*500
Dichloromethylene anion		75.63	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		-41.3	-43.0	± 2.0	kJ/mol	83.9246 ± 0.0020	32180-91-9*0
Chloromethylium		962.4	958.5	± 1.2	kJ/mol	49.4787 ± 0.0012	59000-00-9*0
Chloromethylene		346.12	346.42	± 0.89	kJ/mol	48.4713 ± 0.0012	2108-20-5*1
1,2-Dichloroethane			-165.63	± 0.56	kJ/mol	98.9586 ± 0.0024	107-06-2*500
1,1-Dichloroethane			-163.40	± 0.54	kJ/mol	98.9586 ± 0.0024	75-34-3*500
Chlorosyl chloride		134.5	133.2	± 1.4	kJ/mol	86.9048 ± 0.0018	86825-56-1*0
Hydroxydioxonitrate		-190.5	-194.8	± 3.2	kJ/mol	63.01343 ± 0.00091	58875-09-5*0
Chloroform			-133.73	± 0.52	kJ/mol	119.3767 ± 0.0028	67-66-3*590
Chlorodibromomethane		18.8	-0.0	± 3.4	kJ/mol	208.2793 ± 0.0023	124-48-1*0
Fluorotribromomethane		-107.2	-131.2	± 1.6	kJ/mol	270.7211 ± 0.0031	353-54-8*0
Chlorotribromomethane		77.3	54.4	± 1.6	kJ/mol	287.1754 ± 0.0032	594-15-0*0
Chlorobromomethane		-29.0	-43.0	± 1.3	kJ/mol	129.3833 ± 0.0016	74-97-5*0
Fluoromethyliumylidene		1122.67	1125.89	± 0.48	kJ/mol	31.00855 ± 0.00080	33412-11-2*0
Fluoromethylene		148.34	148.62	± 0.46	kJ/mol	32.01704 ± 0.00080	13453-52-6*0
Ethyl iodide		8.69	-7.19	± 0.49	kJ/mol	155.9656 ± 0.0016	75-03-6*0
1,2-Dibromoacetylene		333.3	322.4	± 3.6	kJ/mol	183.8294 ± 0.0026	624-61-3*0
Azanylium		1266.55	1264.48	± 0.12	kJ/mol	16.02207 ± 0.00016	15194-15-7*0
Fluoro(fluorooxy)methylene		-100.9	-99.1	± 2.1	kJ/mol	66.00691 ± 0.00085	479587-30-9*101
Fluorooxomethylium		724.6	724.3	± 1.4	kJ/mol	47.00795 ± 0.00085	38264-00-5*0
Fluoroisoformyl		-38.8	-33.4	± 2.0	kJ/mol	47.00850 ± 0.00085	1871-24-50
Benzene cation		992.47	976.00	± 0.23	kJ/mol	78.1113 ± 0.0048	34504-50-2*0
Hydrogen fluoride			-321.04	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*902
Ammonia			-80.890	± 0.053	kJ/mol	17.03056 ± 0.00022	7664-41-7*1000
Ammonium nitrate		-350.29	-365.25	± 0.18	kJ/mol	80.04344 ± 0.00095	6484-52-2*500
2-Oxopropylium		784.4	770.6	± 1.8	kJ/mol	57.0707 ± 0.0024	54088-52-7*0
1,2-Dibromoethane		-10.9	-37.8	± 1.3	kJ/mol	187.8612 ± 0.0026	106-93-4*0
Nirous oxide cation		1329.67	1326.77	± 0.12	kJ/mol	44.01233 ± 0.00033	12269-46-4*0
(E)-Diazene anion		265.5	258.7	± 2.0	kJ/mol	30.02991 ± 0.00020	59952-06-60
Methylimidogen		323.1	315.4	± 1.7	kJ/mol	29.04126 ± 0.00083	27770-42-9*0
(Z)-Diazene cation	$[H]/N=[N+]\[H]$	1157.0	1150.1	± 1.3	kJ/mol	30.02881 ± 0.00020	86631-37-0*0
Iminomethyl anion		252.7	248.9	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*2
Hydrogen cyanide cation		1442.52	1442.06	± 0.20	kJ/mol	27.02483 ± 0.00081	12601-62-6*0
1-Hydrazinylium-1-yl		1143.4	1136.4	± 1.4	kJ/mol	30.02881 ± 0.00020	63986-30-1*0
Diiodide		-178.13	-180.72	± 0.48	kJ/mol	253.809489 ± 0.000060	12190-71-5*0
Methyleneoxonium cation		827.8	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		-105.347	-109.186	± 0.098	kJ/mol	30.02598 ± 0.00087	50-00-0*2
Hydrogen peroxide cation		930.4	923.6	± 1.0	kJ/mol	34.01413 ± 0.00062	12325-10-9*2
Oxadiazirine anion		95.1	95.5	± 2.9	kJ/mol	44.01343 ± 0.00033	350586-31-1*0
Hydroxymethylene cation		986.4	982.8	± 1.6	kJ/mol	30.02543 ± 0.00087	135395-06-1*2
Hydroxymethylene cation		1482.1	1479.4	± 1.9	kJ/mol	30.02543 ± 0.00087	135395-06-1*3
Hydroxymethylene anion		160.2	157.5	± 1.7	kJ/mol	30.02653 ± 0.00087	207914-87-2*2
Hydroxymethylene anion		334.0	334.8	± 2.1	kJ/mol	30.02653 ± 0.00087	207914-87-2*3
Aquacarbon		467.6	465.5	± 1.9	kJ/mol	30.02598 ± 0.00087	81434-73-3*102
Aquacarbon cation		1196.1	1193.0	± 1.7	kJ/mol	30.02543 ± 0.00087	81434-73-30
Trioxidaniumyl		935.4	926.4	± 1.6	kJ/mol	50.01353 ± 0.00091	161321-37-5*3
Peroxyformic acid		-265.8	-273.8	± 1.7	kJ/mol	62.0248 ± 0.0012	107-32-4*2
Peroxyformic acid		-265.6	-273.5	± 1.6	kJ/mol	62.0248 ± 0.0012	107-32-4*3
Hydrogen fluoride			-320.86	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*815
Diazenide		347.5	344.6	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*1
Fluorodioxidanide		-256.9	-256.1	± 1.9	kJ/mol	50.99775 ± 0.00060	23553-17-5*0
Propynylidene cation		1410.8	1413.4	± 1.3	kJ/mol	38.0474 ± 0.0024	75123-91-0*0
Propynylidene		597.3	599.1	± 1.1	kJ/mol	38.0480 ± 0.0024	67152-18-5*4
Hydroxylamine		-15.0	-25.5	± 1.9	kJ/mol	33.02996 ± 0.00037	7803-49-8*2
Propadienylidenide		381.16	382.06	± 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
Hydroxylamine cation		857.9	848.0	± 2.2	kJ/mol	33.02941 ± 0.00037	62675-55-2*0
Dihydrogen fluoride anion		-61.9	-60.5	± 3.2	kJ/mol	21.01483 ± 0.00014	117339-92-1*2
Hydrogen chloride			-165.559	± 0.026	kJ/mol	36.46064 ± 0.00090	7647-01-0*825
Nitroxyl cation		946.15	939.02	± 0.87	kJ/mol	32.02147 ± 0.00034	51375-41-80
n-Pentane		-156.15	-173.12	± 0.31	kJ/mol	72.1488 ± 0.0041	109-66-0*500
iso-Pentane			-178.53	± 0.44	kJ/mol	72.1488 ± 0.0041	78-78-4*500
neo-Pentane			-189.96	± 0.40	kJ/mol	72.1488 ± 0.0041	463-82-1*500
Cyclopentane			-106.29	± 0.44	kJ/mol	70.1329 ± 0.0041	287-92-3*590
1,5-Hexadiene		108.34	83.75	± 0.40	kJ/mol	82.1436 ± 0.0049	592-42-7*0
Chlorine oxide peroxide		226.5	227.4	± 2.5	kJ/mol	83.4509 ± 0.0013	141801-67-4*100
2-Hydroxyethylium		1024.4	1011.8	± 2.3	kJ/mol	45.0600 ± 0.0017	38607-31-7*1
Ethoxy		1.84	-11.59	± 0.52	kJ/mol	45.0605 ± 0.0017	2154-50-9*0
Ethyloxoniumylidene		988.8	975.1	± 1.9	kJ/mol	45.0600 ± 0.0017	54387-07-4*0
Dihydrogen fluoride		-55.9	-54.9	± 1.6	kJ/mol	21.01428 ± 0.00014	12592-22-2*1
Hydroxyaminylium		1048.6	1041.5	± 2.6	kJ/mol	32.02147 ± 0.00034	66097-71-0*2
Nitrosyl fluoride		-85.82	-88.18	± 0.93	kJ/mol	49.00454 ± 0.00031	7789-25-5*0
Formylmethyl anion		140.5	134.2	± 1.9	kJ/mol	43.0452 ± 0.0016	64723-93-9*0
Hydroxyamidogen anion		90.9	85.0	± 2.9	kJ/mol	32.02257 ± 0.00034	66097-71-00
Dicarbon monoxide cation		1434.0	1439.1	± 2.2	kJ/mol	40.0203 ± 0.0016	12287-08-0*0
1,3-Butadiyne-1,4-diyl		1052.45	1062.43	± 0.67	kJ/mol	48.0428 ± 0.0032	78015-07-3*0
C=O-C cation		1812.6	1816.6	± 2.4	kJ/mol	40.0203 ± 0.0016	83483-98-1*2
1-Chloro ozone anion		-108.9	-111.4	± 2.2	kJ/mol	83.4514 ± 0.0013	224299-15-4*3
Oxirene cation		1109.0	1105.5	± 5.2	kJ/mol	42.0361 ± 0.0016	94664-69-4*0
1-Chloro ozone anion		-66.8	-68.7	± 2.1	kJ/mol	83.4514 ± 0.0013	224299-15-4*1
Dihydrogen cation		1488.364	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*0
Nitrosyl nitrate		70.6	62.3	± 1.8	kJ/mol	92.0111 ± 0.0012	15969-55-80
Formic acid anion		-241.2	-246.9	± 1.9	kJ/mol	46.0259 ± 0.0010	19066-82-1*2
Bifluoride		-705.22	-709.07	± 0.36	kJ/mol	39.005295 ± 0.000070	18130-74-0*0
Dioxirane cation		1050.8	1043.2	± 2.0	kJ/mol	46.0248 ± 0.0010	232262-10-1*0
Dioxymethyl cation		1075.0	1068.6	± 1.8	kJ/mol	46.0248 ± 0.0010	232262-11-2*0
Deuterium atom cation		1532.210	1534.123	± 0.000	kJ/mol	2.01355319809 ± 0.00000000040	14464-47-2*0
Dioxymethylene		341.1	338.9	± 3.4	kJ/mol	45.0174 ± 0.0010	438586-67-5*2
Dioxofluorine		524.0	523.2	± 1.1	kJ/mol	50.99720 ± 0.00060	175861-93-5*0
Trifluoride ion		-348.9	-349.7	± 2.6	kJ/mol	56.9957582 ± 0.0000015	25730-99-8*0
Cyanato cation		1261.56	1262.07	± 0.59	kJ/mol	42.01629 ± 0.00086	17247-99-3*0
Nitrous acid		-73.023	-78.680	± 0.079	kJ/mol	47.01348 ± 0.00061	7782-77-6*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
Acetic acid		-484.11	-483.68	± 0.18	kJ/mol	60.0520 ± 0.0017	64-19-7*500
Acetic acid			-484.73	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*825
Acetic acid			-484.91	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*835
Dioxaziridinyl cation		1365.8	1363.3	± 1.7	kJ/mol	46.00499 ± 0.00060	66252-29-70
(Formyloxy)methyl		-133.6	-141.8	± 2.2	kJ/mol	59.0440 ± 0.0017	3122-12-1*2
Ethane cation		1043.20	1029.19	± 0.60	kJ/mol	30.0685 ± 0.0017	34488-65-8*0
Glyoxal		-188.51	-193.95	± 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
Fluoroniumyl ion		1275.556	1275.788	± 0.050	kJ/mol	20.005795 ± 0.000070	12381-92-9*0
Dimethylaminylium		1040.0	1024.6	± 1.8	kJ/mol	44.0752 ± 0.0017	49784-85-2*0
Isocyanogen anion		383.7	387.4	± 2.6	kJ/mol	52.0354 ± 0.0016	83951-85-31
Diisocyanogen cation		1823.1	1825.9	± 3.5	kJ/mol	52.0343 ± 0.0016	78800-21-21
Cyanomethylidyne		676.1	680.5	± 1.9	kJ/mol	38.0281 ± 0.0016	4120-02-9*0
Dioxaziridinyl anion		295.9	293.4	± 1.7	kJ/mol	46.00609 ± 0.00060	66252-31-1*0
Perchloryloxy		248.6	241.0	± 1.8	kJ/mol	99.4503 ± 0.0015	12133-63-0*0
Hydrogen fluoride			-321.16	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*823
Dichloromethylene		313.62	314.82	± 0.90	kJ/mol	82.9161 ± 0.0020	1605-72-7*1
Perchlorate		-263.2	-272.1	± 2.2	kJ/mol	99.4508 ± 0.0015	14797-73-0*0
Trioxidanylium		1085.3	1079.1	± 1.5	kJ/mol	49.00559 ± 0.00090	74241-49-9*2
Azidonitrene		660.8	657.6	± 1.6	kJ/mol	56.02696 ± 0.00028	147363-92-6*1
Ethylene anion		232.1	224.5	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*1
Chloromethyliumyl		1207.3	1207.6	± 2.0	kJ/mol	48.4708 ± 0.0012	89877-51-0*0
Chloromethylene anion		203.42	204.23	± 0.94	kJ/mol	48.4719 ± 0.0012	75466-08-9*0
Chlorohydroxymethyl		-46.0	-51.6	± 2.0	kJ/mol	65.4787 ± 0.0012	147139-06-8*2
1,1,2-Trichloroethane			-188.5	± 1.4	kJ/mol	133.4033 ± 0.0031	79-00-5*500
Hexachloroethane			-216.6	± 2.9	kJ/mol	236.7376 ± 0.0056	67-72-1*500
trans-1,2-Dichloroethene	$C(\Cl)=C/Cl$	5.29	-0.13	± 0.56	kJ/mol	96.9427 ± 0.0024	156-60-5*0
Chlorine difluoride anion		-504.9	-505.8	± 1.9	kJ/mol	73.45005 ± 0.00090	16892-05-0*0
Tetrachloroethene			-62.9	± 1.1	kJ/mol	165.8322 ± 0.0039	127-18-4*500
Azanylium		944.272	937.318	± 0.030	kJ/mol	17.03001 ± 0.00022	19496-55-0*0
Hydrofluorate ion		-75.6	-75.1	± 1.8	kJ/mol	20.006892 ± 0.000070	37249-79-9*0
Chlorine difluoride		22.5	23.8	± 1.9	kJ/mol	73.44951 ± 0.00090	91483-78-2*0
Nitric acid			-206.31	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*839
Hydrogen chloride			-166.685	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*841
Fluorochlorobromomethane		-219.3	-231.7	± 5.5	kJ/mol	147.3737 ± 0.0016	593-98-6*0
Fluoromethyliumyl		1116.9	1117.2	± 2.4	kJ/mol	32.01649 ± 0.00080	89877-52-1*0
Fluoromethylene anion		95.94	96.47	± 0.64	kJ/mol	32.01759 ± 0.00080	71267-42-0*0
Peroxyimidogen cation		1409.6	1406.8	± 1.9	kJ/mol	46.00499 ± 0.00060	60488-32-60
Fluorodioxidenium		1221.9	1219.5	± 2.0	kJ/mol	50.99665 ± 0.00060	139584-95-5*0
Polytetrafluoroethylene			-829.49	± 0.58	kJ/mol	100.0150 ± 0.0016	9002-84-0*591
Nitric acid		-179.01	-173.29	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*500
Dihydrooxooxygen cation		994.5	987.8	± 1.6	kJ/mol	34.01413 ± 0.00062	177329-59-8*0
cis-1,2-Difluoroethene	$F/C=C\F$	-302.9	-309.7	± 1.1	kJ/mol	64.0341 ± 0.0016	1630-77-9*0
trans-1,2-Difluoroethene		-299.7	-306.1	± 1.1	kJ/mol	64.0341 ± 0.0016	1630-78-0*0
Bromoacetylene		282.4	275.9	± 2.2	kJ/mol	104.9333 ± 0.0019	593-61-3*0
Formyl fluoride cation		816.6	813.3	± 1.3	kJ/mol	48.01589 ± 0.00086	99766-68-4*0
Formyl fluoride		-405.4	-403.9	± 1.8	kJ/mol	47.00905 ± 0.00085	62227-71-8*0
Fluoroisoformyl cation		1347.5	1348.9	± 2.5	kJ/mol	47.00795 ± 0.00085	1871-25-60
Hydrogen fluoride			-321.01	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*901
Aminyliumyl		1659.03	1659.96	± 0.24	kJ/mol	15.014131 ± 0.000099	19067-62-0*0
Peroxyimidogen anion		165.0	162.7	± 1.7	kJ/mol	46.00609 ± 0.00060	60488-31-5*0
Fluorosyl fluoride anion		-147.2	-146.9	± 3.0	kJ/mol	53.99675 ± 0.00030	86825-57-22
Hydrogen fluoride			-302.39	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*590
o-Benzyne cation		1393.8	1385.8	± 1.7	kJ/mol	76.0954 ± 0.0048	70220-84-7*0
m-Benzyne cation		1365.5	1357.0	± 1.9	kJ/mol	76.0954 ± 0.0048	121058-08-0*0
p-Benzyne		603.5	594.2	± 1.2	kJ/mol	76.0960 ± 0.0048	3355-34-8*1
Hydrogen bromide			-120.23	± 0.16	kJ/mol	80.9119 ± 0.0010	10035-10-6*834
Xenon cation		1170.354	1170.354	± 0.0062	kJ/mol	131.2895 ± 0.0200	24203-25-6*0
Hydrogen bromide			-120.52	± 0.16	kJ/mol	80.9119 ± 0.0010	10035-10-6*844
Acetylene anion		356.9	356.7	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*1
Krypton hydride cation		1106.33	1104.55	± 0.69	kJ/mol	84.8074 ± 0.1000	37276-90-7*0
Allylium		964.09	952.53	± 0.55	kJ/mol	41.0713 ± 0.0024	1724-44-3*0
Allyl anion		133.02	123.27	± 0.86	kJ/mol	41.0723 ± 0.0024	1724-46-5*0
1-Propenyl cation		1232.6	1222.3	± 1.7	kJ/mol	41.0713 ± 0.0024	50457-58-4*2
1-Propenyl anion		203.6	192.4	± 1.8	kJ/mol	41.0723 ± 0.0024	65887-20-9*2
1-Propenyl cation		1234.3	1223.9	± 1.7	kJ/mol	41.0713 ± 0.0024	50457-58-4*1
1-Propenyl anion		210.2	199.1	± 1.8	kJ/mol	41.0723 ± 0.0024	65887-20-9*1
Methylimidogen anion		321.1	313.5	± 1.8	kJ/mol	29.04181 ± 0.00083	82539-34-2*0
Trioxodinitrate anion		-88.5	-95.6	± 2.1	kJ/mol	76.01223 ± 0.00091	194856-62-7*1
Hydrogen fluoride			-321.16	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*905
Trioxidanylium		1070.6	1064.3	± 1.4	kJ/mol	49.00559 ± 0.00090	74241-49-9*0
Cycloprop-2-enylium		1080.7	1075.6	± 1.4	kJ/mol	39.0554 ± 0.0024	26810-74-2*0
Ethynylene cation		1967.9	1974.5	± 1.9	kJ/mol	24.0209 ± 0.0016	12595-79-8*0
Methyleneaminylium		1456.6	1453.0	± 2.2	kJ/mol	28.03277 ± 0.00082	53518-13-1*1
Propynylidene		543.38	546.38	± 0.63	kJ/mol	38.0480 ± 0.0024	67152-18-5*0
Hypobromous acid cation		974.82	964.20	± 0.64	kJ/mol	96.9108 ± 0.0010	154804-02-1*0
Cyclopropyne		791.3	790.8	± 1.4	kJ/mol	38.0480 ± 0.0024	60701-63-5*0
Cyclopropenyliumdiyl		1692.0	1694.9	± 1.9	kJ/mol	37.0395 ± 0.0024	127476-05-5*0
Cyclopropynyl anion		517.8	520.8	± 1.1	kJ/mol	37.0406 ± 0.0024	136861-42-2*0
Hypochlorous acid cation		998.91	995.86	± 0.90	kJ/mol	52.45949 ± 0.00095	71606-47-8*0
Nitrate			-206.63	± 0.18	kJ/mol	62.00549 ± 0.00090	14797-55-8*800
Hypofluorous acid anion		155.3	154.7	± 2.6	kJ/mol	36.00629 ± 0.00031	36505-07-4*2
Nitrogen hydride oxide		71.6	60.4	± 2.0	kJ/mol	33.02996 ± 0.00037	38544-48-8*0
Nirous oxide anion		99.2	96.6	± 1.9	kJ/mol	44.01343 ± 0.00033	12274-12-3*0
Hydrogen chloride			-165.948	± 0.026	kJ/mol	36.46064 ± 0.00090	7647-01-0*907
Aminomethyliumylidene		1168.3	1165.1	± 2.2	kJ/mol	28.03277 ± 0.00082	86784-42-1*0
Cyclopentene			4.98	± 0.42	kJ/mol	68.1170 ± 0.0040	142-29-0*590
Hydrogen chloride			-166.639	± 0.025	kJ/mol	36.46064 ± 0.00090	7647-01-0*840
Nitroxyl anion		48.7	41.7	± 2.0	kJ/mol	32.02257 ± 0.00034	51375-41-8*0
Tribromide		-287.6	-308.0	± 1.9	kJ/mol	239.7125 ± 0.0030	14522-80-6*0
Nitrosyl nitrite		109.3	105.2	± 1.8	kJ/mol	76.01168 ± 0.00091	122413-35-8*2
Ethanol		-269.34	-277.10	± 0.21	kJ/mol	46.0684 ± 0.0017	64-17-5*500
Hydrogen chloride			-165.548	± 0.027	kJ/mol	36.46064 ± 0.00090	7647-01-0*953
Methylammoniumyl		865.1	851.2	± 1.8	kJ/mol	31.05659 ± 0.00088	34516-31-9*0
1-Hydroxyethyl anion		-19.9	-33.3	± 2.9	kJ/mol	45.0610 ± 0.0017	88032-18-2*0
1,2-Propadien-1-yl-3-ylidene anion		621.9	629.3	± 1.3	kJ/mol	36.0326 ± 0.0024	109292-47-9*0
Trifluorine cation		1529.5	1527.4	± 2.3	kJ/mol	56.9946610 ± 0.0000015	64710-22-1*0
2-Cyclopropyn-1-ylidene		993.8	1000.6	± 2.5	kJ/mol	36.0321 ± 0.0024	102508-15-6*2
Acetaldehyde anion		-61.8	-72.1	± 2.1	kJ/mol	44.0531 ± 0.0017	60427-04-5*0
Hydrogen chloride			-166.714	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*951
Propynylidyne anion		664.9	672.2	± 1.6	kJ/mol	36.0326 ± 0.0024	500574-36-7*0
Ketene cation		882.20	879.18	± 0.13	kJ/mol	42.0361 ± 0.0016	64999-16-2*0
Ketene anion		-16.0	-19.1	± 2.2	kJ/mol	42.0372 ± 0.0016	56391-79-8*0
Oxoethenylium		1139.3	1142.1	± 2.9	kJ/mol	41.0282 ± 0.0016	92056-63-8*0
Bicyclo[1.1.0]buta-1,3-diene-2,4-diyl		1047.48	1055.08	± 0.72	kJ/mol	48.0428 ± 0.0032	12184-80-4*0
Hydrooxonitrate		78.59	75.67	± 0.99	kJ/mol	31.01463 ± 0.00032	66057-02-1*0
Triazirine		464.1	457.6	± 2.6	kJ/mol	43.02816 ± 0.00022	157-29-9*0
Ethynol cation		1063.5	1061.3	± 2.9	kJ/mol	42.0361 ± 0.0016	84005-02-7*0
Methyl hydroperoxide cation		833.5	820.3	± 2.2	kJ/mol	48.0407 ± 0.0010	112465-88-0*0
Methoxyoxoniumylidene		1012.9	1004.6	± 2.0	kJ/mol	47.0328 ± 0.0010	86475-50-5*0
Hydroxyimidogen anion		229.9	227.4	± 2.3	kJ/mol	31.01463 ± 0.00032	35337-59-80
Dioxirane anion		-170.4	-177.2	± 3.9	kJ/mol	46.0259 ± 0.0010	157-26-60
Peroxychloric acid		77.5	69.3	± 2.6	kJ/mol	100.4582 ± 0.0015	177778-91-5*0
Dioxymethyl anion		55.0	49.8	± 1.4	kJ/mol	46.0259 ± 0.0010	93207-29-5*0
Hypochlorous acid anion		198.7	198.3	± 2.5	kJ/mol	52.46059 ± 0.00095	34524-94-2*0
Methylamine anion		83.9	69.0	± 2.8	kJ/mol	31.05769 ± 0.00088	81096-79-9*0
Formyloxidanyl		-125.57	-126.93	± 0.56	kJ/mol	45.0174 ± 0.0010	16499-21-1*0
Dioxiranyl		216.2	212.8	± 2.4	kJ/mol	45.0174 ± 0.0010	120595-16-6*0
Deuterium hydride cation		1490.498	1490.587	± 0.000	kJ/mol	3.021493 ± 0.000070	12181-16-7*0
Oxobromonium		1139.2	1131.4	± 1.6	kJ/mol	95.9029 ± 0.0010	142315-39-7*0
2-Propanol		-305.60	-318.40	± 0.32	kJ/mol	60.0950 ± 0.0025	67-63-0*500
1-Propanol		-290.56	-302.74	± 0.24	kJ/mol	60.0950 ± 0.0025	71-23-8*500
Tetranitrogen cation		1392.8	1392.5	± 1.5	kJ/mol	56.02641 ± 0.00028	12185-04-5*0
Hydroxyoxoammoniumyl		984.1	977.6	± 1.8	kJ/mol	47.01293 ± 0.00061	80371-48-8*0
Cyanogen bromide anion		58.2	54.6	± 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
Acetic acid		-418.51	-432.63	± 0.52	kJ/mol	60.0520 ± 0.0017	64-19-7*0
Bromine dioxide		167.1	157.5	± 3.0	kJ/mol	111.9028 ± 0.0012	21255-83-4*0
Dinitrogen pentoxide			-41.06	± 0.42	kJ/mol	108.0105 ± 0.0015	10102-03-1*500
Methoxycarbonyl		-150.1	-158.0	± 2.1	kJ/mol	59.0440 ± 0.0017	16481-04-2*1
Dioxygen		-0.000	-0.000	± 0.000	kJ/mol	31.99880 ± 0.00060	7782-44-7*1
Diazenium		968.59	957.33	± 0.77	kJ/mol	31.03675 ± 0.00025	37369-93-0*0
Oxalic acid		-710.8	-721.4	± 2.1	kJ/mol	90.0349 ± 0.0020	144-62-7*0
2-Chloro ozone anion		-103.4	-105.7	± 3.2	kJ/mol	83.4514 ± 0.0013	141801-67-40
Fluorine atom cation		1758.301	1760.599	± 0.048	kJ/mol	18.99785462 ± 0.00000050	14701-13-4*0
Water			-285.838	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*589
Methanol anion		-89.0	-99.7	± 2.8	kJ/mol	32.04241 ± 0.00090	68474-04-4*0
Isocyanogen anion		386.6	389.5	± 3.0	kJ/mol	52.0354 ± 0.0016	83951-85-32
Diisocyanogen cation		1835.1	1837.8	± 3.5	kJ/mol	52.0343 ± 0.0016	78800-21-22
Ethanium		888.8	870.3	± 1.8	kJ/mol	31.0764 ± 0.0017	24669-33-8*2
Ethanium		895.2	877.3	± 1.9	kJ/mol	31.0764 ± 0.0017	24669-33-8*3
Hydroperoxyimidogen		103.3	99.7	± 2.4	kJ/mol	47.01348 ± 0.00061	877456-58-1*1
Cyanoamidogen anion		72.0	69.0	± 1.8	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		578.8	579.5	± 3.8	kJ/mol	40.02418 ± 0.00081	2468-81-7*0
Trichloromethylium		854.24	852.72	± 0.96	kJ/mol	118.3683 ± 0.0028	27130-34-3*0
Dichloromethyliumyl		1121.6	1122.6	± 1.8	kJ/mol	82.9156 ± 0.0020	55945-51-2*0
Ethylene anion		231.6	225.5	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*2
Formaldehyde anion		-26.7	-28.3	± 2.0	kJ/mol	30.02653 ± 0.00087	27837-46-3*0
Hydrogen chloride			-165.981	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*829
Formaldehyde		196.044	192.713	± 0.098	kJ/mol	30.02598 ± 0.00087	50-00-0*1
Bromine atom		117.917	111.855	± 0.056	kJ/mol	79.90400 ± 0.00100	10097-32-2*1
Nitric acid cation		1029.14	1020.08	± 0.69	kJ/mol	63.01233 ± 0.00091	272109-63-4*0
Trichloroethene			-48.7	± 1.6	kJ/mol	131.3874 ± 0.0031	79-01-6*590
Aminomethyl anion		209.2	199.0	± 2.1	kJ/mol	30.04975 ± 0.00085	74215-21-7*0
Chlorosyl chloride cation		1132.6	1130.8	± 2.0	kJ/mol	86.9043 ± 0.0018	86825-56-10
Chloromethane cation		1015.11	1008.34	± 0.25	kJ/mol	50.4867 ± 0.0012	12538-71-5*0
1-Ethylium-1-yl		1182.1	1174.7	± 3.2	kJ/mol	28.0526 ± 0.0016	85944-79-2*0
Ethylidene anion		325.8	318.4	± 1.9	kJ/mol	28.0537 ± 0.0016	35829-99-3*0
Fluorosyl fluoride cation		1413.0	1413.4	± 3.5	kJ/mol	53.99566 ± 0.00030	86825-50-51
Peroxyhypochlorite		-249.23	-248.20	± 0.37	kJ/mol	67.4520 ± 0.0011	224299-14-3*0
Methylaminilium		1134.8	1125.0	± 2.1	kJ/mol	30.04865 ± 0.00085	49784-84-1*0
Fluorobromomethane		-198.0	-212.4	± 5.5	kJ/mol	112.9290 ± 0.0013	373-52-4*0
Chloroniumyl ion		1137.797	1137.731	± 0.0051	kJ/mol	36.46009 ± 0.00090	12258-94-5*0
Chlorine difluoride cation		1346.3	1344.9	± 2.1	kJ/mol	73.44896 ± 0.00090	86825-59-4*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
Chlorine difluoride anion		-319.0	-319.1	± 2.2	kJ/mol	73.45005 ± 0.00090	91419-41-9*0
Krypton cation		1350.756	1350.756	± 0.000	kJ/mol	83.7995 ± 0.1000	16915-28-9*0
Difluoromethyliumyl		908.35	908.78	± 0.91	kJ/mol	50.00696 ± 0.00080	54250-40-7*0
Hydrogen fluoride			-321.05	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*903
Methanimine cation		1056.0	1049.1	± 1.8	kJ/mol	29.04071 ± 0.00083	65130-65-6*0
Methanimine anion		224.3	217.1	± 2.2	kJ/mol	29.04181 ± 0.00083	127593-73-1*0
Ammonium radical		190.01	179.43	± 0.43	kJ/mol	18.03850 ± 0.00029	92075-50-8*0
Dibromine			-2.16	± 0.20	kJ/mol	159.8080 ± 0.0020	7726-95-6*800
Hydrogen fluoride			-321.04	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*888
Ozone cation		1352.870	1350.531	± 0.041	kJ/mol	47.99765 ± 0.00090	12596-82-6*0
Hydrogen fluoride			-321.11	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*890
Hydrogen fluoride			-321.16	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*891
Hydrogen bromide			-120.46	± 0.16	kJ/mol	80.9119 ± 0.0010	10035-10-6*952
Aminomethyliumyl		1039.5	1031.8	± 2.3	kJ/mol	29.04071 ± 0.00083	89302-94-3*0
Difluorophosgene cation		653.41	650.78	± 0.57	kJ/mol	66.00636 ± 0.00085	73256-56-1*0
Difluorophosgene anion		-603.6	-605.5	± 3.4	kJ/mol	66.00745 ± 0.00085	474815-26-4*0
Carbon atom		711.407	716.892	± 0.048	kJ/mol	12.01070 ± 0.00080	7440-44-0*1
Chlorohydroxymethylene		13.9	11.0	± 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
Chloryl ion		1100.15	1097.49	± 0.52	kJ/mol	67.4510 ± 0.0011	25052-55-5*0
Dibromophosgene			-144.18	± 0.96	kJ/mol	187.8181 ± 0.0022	593-95-3*590
2-Chloroethanol			-315.10	± 0.56	kJ/mol	80.5132 ± 0.0019	107-07-3*590
2-Bromoethanol			-274.83	± 0.48	kJ/mol	124.9645 ± 0.0019	540-51-2*590
Hydrogen bromide			-120.47	± 0.16	kJ/mol	80.9119 ± 0.0010	10035-10-6*842
Imidogen anion		322.62	322.67	± 0.17	kJ/mol	15.015229 ± 0.000099	23841-33-0*0
Trioxidanyl		26.28	23.01	± 0.19	kJ/mol	49.00614 ± 0.00090	12500-78-6*2
Hypofluorous acid cation		1141.99	1138.98	± 0.87	kJ/mol	36.00519 ± 0.00031	90243-22-4*0
Phenylium		1148.45	1135.67	± 0.88	kJ/mol	77.1034 ± 0.0048	17333-73-2*2
Chlorosyl chloride anion		-185.4	-184.7	± 2.3	kJ/mol	86.9053 ± 0.0018	86825-55-00
Carbon atom		833.338	838.485	± 0.048	kJ/mol	12.01070 ± 0.00080	7440-44-0*2
m-Benzyne anion		444.1	435.2	± 1.3	kJ/mol	76.0965 ± 0.0048	249589-31-9*0
p-Benzyne anion		465.1	455.5	± 1.3	kJ/mol	76.0965 ± 0.0048	219298-17-6*0
Chloryl chloride		126.1	122.1	± 1.7	kJ/mol	102.9042 ± 0.0019	117489-73-3*0
Benzylium		929.66	910.16	± 0.63	kJ/mol	91.1299 ± 0.0056	6711-19-9*0
Hydrogen bromide			-120.42	± 0.16	kJ/mol	80.9119 ± 0.0010	10035-10-6*841
Aminomethylene anion		353.0	346.1	± 2.3	kJ/mol	29.04181 ± 0.00083	207914-86-1*0
Phenyloxoniumylidene		902.9	888.6	± 2.4	kJ/mol	93.1028 ± 0.0048	41071-17-4*0
Fluorosyl fluoride anion		-56.6	-56.1	± 2.4	kJ/mol	53.99675 ± 0.00030	86825-57-21
Hydrogen difluoride cation		1174.3	1171.3	± 1.5	kJ/mol	39.004198 ± 0.000070	126950-54-72
Ammonium chloride		-311.728	-314.889	± 0.063	kJ/mol	53.49120 ± 0.00095	12125-02-9*510
Acetylene anion		380.1	380.3	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*2
Fluorobenzene		-151.82	-149.40	± 0.89	kJ/mol	96.1023 ± 0.0048	462-06-6*500
Bromobenzene			59.9	± 1.3	kJ/mol	157.0079 ± 0.0049	108-86-1*500
Ammonium bromide		-253.48	-270.05	± 0.17	kJ/mol	97.9425 ± 0.0010	12124-97-9*510
Acetone		-244.51	-247.63	± 0.32	kJ/mol	58.0791 ± 0.0025	67-64-1*500
Tribromine		155.8	134.1	± 3.2	kJ/mol	239.7120 ± 0.0030	11094-39-6*0
Propionaldehyde		-218.20	-216.75	± 0.29	kJ/mol	58.0791 ± 0.0025	123-38-6*500
Triazirinylium ion		1608.8	1605.9	± 1.6	kJ/mol	42.01967 ± 0.00021	92220-05-8*0
Monoammonium succinate			-1068.01	± 0.72	kJ/mol	135.1186 ± 0.0035	38457-08-8*510
Diammonium succinate			-1182.56	± 0.48	kJ/mol	152.1492 ± 0.0035	2226-88-2*510
Nitrosyl nitrate		48.2	40.2	± 1.8	kJ/mol	92.0111 ± 0.0012	15969-55-8*1
1-Methylethenylium		995.9	986.4	± 2.7	kJ/mol	41.0713 ± 0.0024	50457-57-3*0
Isocyanic fluoride		301.3	303.1	± 1.8	kJ/mol	45.01584 ± 0.00080	16992-26-0*0
Formic acid		-431.56	-424.73	± 0.21	kJ/mol	46.0254 ± 0.0010	64-18-6*500
Bromoniumyl		1097.95	1090.10	± 0.16	kJ/mol	80.9114 ± 0.0010	12258-64-9*0
1-Methylethenyl anion		199.2	188.0	± 2.8	kJ/mol	41.0723 ± 0.0024	65887-19-6*0
Hydrogen fluoride			-321.45	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*832
2-Propen-3-ylium-1-ylidyne		1791.2	1792.8	± 2.6	kJ/mol	38.0474 ± 0.0024	161054-36-0*0
Propenediylidene anion		588.8	590.1	± 2.3	kJ/mol	38.0485 ± 0.0024	161054-36-00
Hydroxyoxoammoniumyl		984.1	977.6	± 1.8	kJ/mol	47.01293 ± 0.00061	80371-48-8*1
Isocyanogen chloride		314.6	316.2	± 2.4	kJ/mol	61.4701 ± 0.0012	75754-69-7*0
(Z)-Diazene anion	$[H]/N=[N-]\[H]$	280.0	273.3	± 2.0	kJ/mol	30.02991 ± 0.00020	86631-37-00
Carbon dioxide cation		1335.0	1335.5	± 2.4	kJ/mol	44.00895 ± 0.00100	12181-61-2*1
Carbon monoxide anion		30.0	33.7	± 2.3	kJ/mol	28.01065 ± 0.00085	12539-63-8*0
Nitrous acid anion		-107.0	-111.7	± 2.4	kJ/mol	47.01403 ± 0.00061	256393-36-9*2
NON anion		495.3	492.8	± 2.5	kJ/mol	44.01343 ± 0.00033	227934-47-60
Peroxyhypochlorous acid anion		-32.2	-34.0	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-32
Iodine monochloride		-36.511	-35.537	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*510
Acetic acid		-397.4	-411.2	± 1.2	kJ/mol	60.0520 ± 0.0017	64-19-7*2
Isocyanogen bromide		341.5	335.8	± 3.4	kJ/mol	105.9214 ± 0.0013	65997-98-0*0
Acetic acid			-484.93	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*839
Oxygen difluoride anion		-202.1	-201.9	± 2.7	kJ/mol	53.99675 ± 0.00030	7783-41-70
Trioxidanyl		25.31	23.22	± 0.13	kJ/mol	49.00614 ± 0.00090	12500-78-6*0
Methyl formate			-386.13	± 0.59	kJ/mol	60.0520 ± 0.0017	107-31-3*500
Hydroxylamine			-97.1	± 2.2	kJ/mol	33.02996 ± 0.00037	7803-49-8*1000
Ethylene glycol		-448.71	-455.23	± 0.38	kJ/mol	62.0678 ± 0.0018	107-21-1*500
Hydrogen chloride			-166.567	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*839
Isocyanogen iodide		341.7	341.9	± 4.9	kJ/mol	152.92191 ± 0.00080	66004-32-8*0
Oxalic acid			-819.30	± 0.46	kJ/mol	90.0349 ± 0.0020	144-62-7*500
Isocyanogen iodide anion		123.0	125.1	± 9.3	kJ/mol	152.92246 ± 0.00080	66004-32-80
Dimethylamine			-43.71	± 0.39	kJ/mol	45.0837 ± 0.0017	124-40-3*500
Nitrosyl nitrite anion		-103.1	-106.2	± 2.8	kJ/mol	76.01223 ± 0.00091	122413-35-81
Dinitrogen dioxide		172.88	171.12	± 0.14	kJ/mol	60.01228 ± 0.00062	16824-89-8*2
Trimethylamine			-49.8	± 1.0	kJ/mol	59.1103 ± 0.0025	75-50-3*500
Cyclobutane			3.92	± 0.41	kJ/mol	56.1063 ± 0.0032	287-23-0*590
Cyanogen cation		1598.34	1600.57	± 0.44	kJ/mol	52.0343 ± 0.0016	37354-81-7*0
Cyanogen anion		282.1	285.2	± 3.3	kJ/mol	52.0354 ± 0.0016	11118-88-0*0
Isocyanogen cation		1652.9	1654.2	± 1.8	kJ/mol	52.0343 ± 0.0016	133415-63-1*0
Methylcyclopropane			1.80	± 0.59	kJ/mol	56.1063 ± 0.0032	594-11-6*590
Methanol		-235.20	-238.53	± 0.15	kJ/mol	32.04186 ± 0.00090	67-56-1*500
Diisocyanogen anion		456.8	463.7	± 5.7	kJ/mol	52.0354 ± 0.0016	78800-22-30
Diazoethenylidene cation		1777.1	1779.1	± 6.1	kJ/mol	52.0343 ± 0.0016	130760-10-00
Diazoethenylidene anion		536.0	538.6	± 5.8	kJ/mol	52.0354 ± 0.0016	130760-11-10
3H-diazirin-3-ylidene-methylene		833.7	836.1	± 3.6	kJ/mol	52.0349 ± 0.0016	204253-88-3*0
Isocyanomethyliumylidene		1612.6	1618.1	± 6.2	kJ/mol	38.0276 ± 0.0016	78271-45-1*0
Isocyanomethylidyne anion		478.6	482.3	± 5.9	kJ/mol	38.0287 ± 0.0016	53590-27-50
Methylamine			-47.01	± 0.36	kJ/mol	31.05714 ± 0.00088	74-89-5*500
Cyanomethyliumylidene		1711.1	1716.5	± 6.0	kJ/mol	38.0276 ± 0.0016	76619-90-4*0
Cyanomethylidyne anion		406.7	410.3	± 5.7	kJ/mol	38.0287 ± 0.0016	12373-35-2*0
2,3-didehydro-1H-azirin-1-yl		722.2	726.2	± 4.9	kJ/mol	38.0281 ± 0.0016	439586-06-8*0
Cyanoaminyliumyl		1671.9	1673.3	± 2.9	kJ/mol	40.02363 ± 0.00081	316122-03-9*0
Cyanoamidogen anion		210.89	210.90	± 0.81	kJ/mol	40.02473 ± 0.00081	189879-95-6*0
Cyanamide			58.89	± 0.54	kJ/mol	42.04006 ± 0.00082	420-04-2*500
Diazomethyliumyl		1641.8	1643.6	± 4.3	kJ/mol	40.02363 ± 0.00081	307495-90-5*0
Diazomethylene anion		407.9	408.0	± 3.9	kJ/mol	40.02473 ± 0.00081	205498-92-6*0
Deuterium hydride		0.328	0.319	± 0.000	kJ/mol	3.022042 ± 0.000070	13983-20-5*0
Methanol dimer		-398.3	-419.0	± 1.4	kJ/mol	64.0837 ± 0.0018	42845-44-3*0
Isodiazene anion		380.9	374.0	± 2.1	kJ/mol	30.02991 ± 0.00020	63986-30-10
1-Ethenylium-1-yl		1507.1	1507.1	± 2.1	kJ/mol	26.0367 ± 0.0016	80541-07-7*0
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
Dioxiranylidene cation		1409.1	1410.3	± 2.6	kJ/mol	44.00895 ± 0.00100	138832-57-20
Trifluorine		80.6	81.9	± 2.6	kJ/mol	56.9952096 ± 0.0000015	73455-86-4*0
Chlorine chlorite		177.4	175.0	± 2.2	kJ/mol	102.9042 ± 0.0019	105206-44-8*2
Cyclopropyl anion		263.5	250.8	± 2.5	kJ/mol	41.0723 ± 0.0024	1724-45-4*0
Dioxiranylidene anion		-110.2	-109.7	± 3.0	kJ/mol	44.01005 ± 0.00100	138832-58-30
Carbon monoxide		465.581	469.288	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*1
Trihydrogen		756.931	754.146	± 0.015	kJ/mol	3.02382 ± 0.00021	12184-91-7*2
Hydrogen fluoride			-321.02	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*887
Hydrogen chloride			-166.743	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*842
1,1,1-Trichloroethane			-177.63	± 0.52	kJ/mol	133.4033 ± 0.0031	71-55-6*500
Trioxidane		-81.71	-90.31	± 0.72	kJ/mol	50.01408 ± 0.00091	14699-99-1*0
Nitrogen sesquioxide cation		1027.7	1023.8	± 3.4	kJ/mol	76.01113 ± 0.00091	10544-73-70
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
Paraformaldehyde			-179.2	± 1.6	kJ/mol	30.02598 ± 0.00087	30525-89-4*500
1,1-Dichloroethene			-23.82	± 0.51	kJ/mol	96.9427 ± 0.0024	75-35-4*500
Isoprene			48.67	± 0.73	kJ/mol	68.1170 ± 0.0040	78-79-5*500
n-Hexane		-180.03	-198.69	± 0.34	kJ/mol	86.1754 ± 0.0049	110-54-3*500
Oxadiazirine		1509.9	1507.4	± 2.4	kJ/mol	44.01233 ± 0.00033	227934-45-40
Cyclohexane			-156.33	± 0.36	kJ/mol	84.1595 ± 0.0049	110-82-7*500
Nitrato		1290.55	1285.84	± 0.86	kJ/mol	62.00439 ± 0.00090	133057-96-2*0
Dihydrogen fluoride		-56.5	-54.2	± 1.7	kJ/mol	21.01428 ± 0.00014	12592-22-2*2
Dichloromethane			-123.42	± 0.50	kJ/mol	84.9320 ± 0.0020	75-09-2*590
n-Heptane		-201.78	-224.23	± 0.48	kJ/mol	100.2019 ± 0.0057	142-82-5*500
Oxygen difluoride cation		1292.10	1289.58	± 0.66	kJ/mol	53.99566 ± 0.00030	39432-25-2*0
n-Octane		-226.70	-249.82	± 0.67	kJ/mol	114.2285 ± 0.0065	111-65-9*500
Nitric acid			-186.85	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*801
1,5-Hexadiene			54.39	± 0.32	kJ/mol	82.1436 ± 0.0049	592-42-7*500
1-Propynylium		1547.1	1545.1	± 3.1	kJ/mol	39.0554 ± 0.0024	24858-94-4*0
Hydrogen peroxide		-193.185	-187.368	± 0.079	kJ/mol	34.01468 ± 0.00062	7722-84-1*500
1,2-Propadien-1-ylium-1-yl-3-ylidene		1982.1	1991.2	± 2.2	kJ/mol	36.0316 ± 0.0024	118090-85-0*1
Trioxirane		272.9	270.3	± 1.3	kJ/mol	47.99820 ± 0.00090	153851-84-4*0
Ammonia anion		94.3	87.3	± 2.4	kJ/mol	17.03111 ± 0.00022	37353-00-7*0
Difluoromethylene anion		-211.21	-209.99	± 0.60	kJ/mol	50.00805 ± 0.00080	66212-40-6*0
Nitric acid			-197.76	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*805
Nitrosyl nitrite		125.7	120.4	± 2.1	kJ/mol	76.01168 ± 0.00091	122413-35-8*3
Fluoromethylidyne anion		200.8	204.3	± 1.9	kJ/mol	31.00965 ± 0.00080	33412-12-3*0
Hydrochlorate ion		-25.2	-24.2	± 2.5	kJ/mol	36.46119 ± 0.00090	63099-75-2*0
Cycloprop-1-enylium		1502.3	1498.1	± 2.2	kJ/mol	39.0554 ± 0.0024	117067-78-4*0
Cycloprop-1-enyl anion		373.5	369.0	± 2.2	kJ/mol	39.0565 ± 0.0024	80251-77-0*0
Oxygen atom hexacation		42035.28	42037.14	± 0.12	kJ/mol	15.99611 ± 0.00030	14158-22-6*0
Nitric acid trihydrate		-1062.12	-1055.27	± 0.21	kJ/mol	117.0587 ± 0.0019	13444-83-2*500
1,2-Difluoroacetylene cation		1081.2	1084.3	± 1.5	kJ/mol	62.0177 ± 0.0016	268566-70-7*0
Dioxymethylidyne cation		1436.6	1439.1	± 2.7	kJ/mol	44.00895 ± 0.00100	791121-04-52
Propane cation		974.6	954.7	± 1.7	kJ/mol	44.0951 ± 0.0025	34479-70-4*0
Azide ion			272.61	± 0.48	kJ/mol	42.02077 ± 0.00021	14343-69-2*800
Dihydrogen cation		1489.060	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*1
Nitric acid monohydrate		-479.18	-472.68	± 0.19	kJ/mol	81.0282 ± 0.0012	13444-82-1*500
Carbon dioxide anion		-340.6	-340.1	± 2.2	kJ/mol	44.01005 ± 0.00100	14485-07-5*0
NON cation		1443.9	1444.1	± 2.8	kJ/mol	44.01233 ± 0.00033	227934-46-50
Peroxyhypochlorous acid cation		1030.3	1024.5	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-21
Chloro(chlorooxy)methylene		73.5	73.7	± 3.6	kJ/mol	98.9155 ± 0.0020	479587-31-0*2
Hydrogen difluoride cation		1267.6	1265.4	± 4.1	kJ/mol	39.004198 ± 0.000070	126950-54-71
Cycloprop-2-enyl anion		514.8	511.8	± 2.2	kJ/mol	39.0565 ± 0.0024	20829-57-6*0
Chlorooxomethylium		783.7	783.9	± 2.2	kJ/mol	63.4623 ± 0.0012	38264-03-8*0
Hydrogen difluoride cation		1241.	1238.	± 17.	kJ/mol	39.004198 ± 0.000070	126950-54-7*1
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
2-Iodoethanol			-207.3	± 2.4	kJ/mol	171.9650 ± 0.0017	624-76-0*590
Dioxymethylidyne cation		1388.2	1391.7	± 3.2	kJ/mol	44.00895 ± 0.00100	791121-04-5101
1,3-Butadiyne cation		1440.20	1442.07	± 0.86	kJ/mol	50.0581 ± 0.0032	55468-55-8*0
Tricarbon dioxide cation		928.4	931.9	± 1.4	kJ/mol	68.0304 ± 0.0025	151528-67-5*0
Tricarbon dioxide anion		-134.0	-130.3	± 3.2	kJ/mol	68.0314 ± 0.0025	109362-94-9*0
Benzene anion		209.0	197.1	± 1.2	kJ/mol	78.1124 ± 0.0048	34562-85-1*0
Peroxychlorous acid		103.5	97.7	± 2.5	kJ/mol	84.4588 ± 0.0013	177778-92-6*2
Tetrazete		764.9	759.0	± 1.8	kJ/mol	56.02696 ± 0.00028	42851-09-2*0
Hydraziniumyl		886.6	873.2	± 2.0	kJ/mol	32.04469 ± 0.00031	20771-51-1*0
Difluorodioxidanium		1283.6	1279.1	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-01
o-Benzyne		625.6	616.3	± 1.1	kJ/mol	76.0960 ± 0.0048	462-80-6*1
Chlorodioxidenium		1202.7	1200.4	± 3.4	kJ/mol	67.4510 ± 0.0011	64710-10-7*0
Hydrazine		57.23	50.67	± 0.18	kJ/mol	32.04524 ± 0.00031	302-01-2*500
Tetraoxodinitrogen cation		1030.6	1025.1	± 2.6	kJ/mol	92.0105 ± 0.0012	64476-91-1*0
m-Benzyne		527.0	518.5	± 1.2	kJ/mol	76.0960 ± 0.0048	1828-89-3*0
Hydrogen chloride			-166.107	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*830
p-Benzyne cation		1425.8	1418.5	± 2.1	kJ/mol	76.0954 ± 0.0048	121058-09-1*0
p-Benzyne		587.1	577.6	± 1.2	kJ/mol	76.0960 ± 0.0048	3355-34-8*0
Toluene		19.87	12.11	± 0.34	kJ/mol	92.1384 ± 0.0056	108-88-3*500
Hydronium radical		-18.5	-21.6	± 2.1	kJ/mol	19.02322 ± 0.00037	12168-76-2*100
Ethylbenzene			-12.55	± 0.55	kJ/mol	106.1650 ± 0.0064	100-41-4*500
Phenylethene			104.29	± 0.48	kJ/mol	104.1491 ± 0.0064	100-42-5*500
Hydrogen bromide			-120.32	± 0.16	kJ/mol	80.9119 ± 0.0010	10035-10-6*839
Phenylacetylene			273.4	± 1.1	kJ/mol	102.1332 ± 0.0064	536-74-3*500
Phenol		-146.32	-162.17	± 0.68	kJ/mol	94.1112 ± 0.0048	108-95-2*500
Cyclopropenylidene anion		544.3	543.8	± 2.2	kJ/mol	38.0485 ± 0.0024	16165-40-50
Benzaldehyde		-85.7	-86.7	± 1.1	kJ/mol	106.1219 ± 0.0056	100-52-7*500
Carbide		504.86	511.43	± 0.52	kJ/mol	24.0219 ± 0.0016	12595-78-7*0
Fluorobenzene anion		-18.3	-30.2	± 1.8	kJ/mol	96.1029 ± 0.0048	34561-55-2*0
Peroxynitrous acid		-6.10	-12.73	± 0.36	kJ/mol	63.01288 ± 0.00091	14691-52-2*0
Tetraazatetrahedrane		763.7	757.2	± 1.7	kJ/mol	56.02696 ± 0.00028	12596-63-3*0
Bromosyl bromide		178.6	162.8	± 2.1	kJ/mol	175.8074 ± 0.0020	68322-97-4*0
Iodobenzene cation		1022.7	1007.2	± 1.0	kJ/mol	204.0078 ± 0.0048	38406-85-8*0
Dioxygen difluoride		75.1	71.6	± 3.6	kJ/mol	69.99561 ± 0.00060	183051-89-0*0
Hydrazoic acid cation		1333.65	1327.98	± 0.83	kJ/mol	43.02761 ± 0.00022	58852-14-5*0
Nitrobenzene			6.4	± 1.4	kJ/mol	123.1094 ± 0.0049	98-95-3*500
Perchloryl cation		1252.0	1246.3	± 2.5	kJ/mol	83.4504 ± 0.0013	23594-88-9*0
Hydrazoic acid anion		309.0	302.7	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*1
Nitromethane		-114.19	-113.00	± 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
Trifluoroethylene		-482.7	-487.7	± 8.4	kJ/mol	82.0245 ± 0.0016	359-11-5*0
Norbornadiene		237.9	212.5	± 1.2	kJ/mol	92.1384 ± 0.0056	121-46-0*0
Norbornadiene			179.1	± 1.1	kJ/mol	92.1384 ± 0.0056	121-46-0*500
2,3-Butanedione			-365.54	± 0.54	kJ/mol	86.0892 ± 0.0033	431-03-8*500
2,3-Butanedione		-310.19	-326.75	± 0.70	kJ/mol	86.0892 ± 0.0033	431-03-8*0
Succinic acid		-918.57	-940.30	± 0.13	kJ/mol	118.0880 ± 0.0034	110-15-6*500
1,2-Diiodoethane		87.78	73.12	± 0.90	kJ/mol	281.8621 ± 0.0016	624-73-7*0
1,2-Diiodoethane			9.25	± 0.60	kJ/mol	281.8621 ± 0.0016	624-73-7*500
1,1-Dibromoethane		-9.2	-36.3	± 7.8	kJ/mol	187.8612 ± 0.0026	557-91-5*0
Dihydrogen		1.417	0.019	± 0.000	kJ/mol	2.01588 ± 0.00014	1333-74-0*1
Xenon hydride cation		1038.15	1036.37	± 0.89	kJ/mol	132.2974 ± 0.0200	37276-91-8*0
Nitrosyl nitrate		60.5	52.5	± 2.0	kJ/mol	92.0111 ± 0.0012	15969-55-8*2
Hydroxylamine		-33.24	-43.61	± 0.50	kJ/mol	33.02996 ± 0.00037	7803-49-8*0
Carbon monoxide		-113.802	-110.522	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*2
Dioxofluorine cation		1667.0	1664.8	± 2.8	kJ/mol	50.99665 ± 0.00060	223566-05-0*0
Hydroxyoxoammoniumyl		1014.7	1008.4	± 2.0	kJ/mol	47.01293 ± 0.00061	80371-48-8*2
Nitrous acid anion		-106.3	-110.2	± 2.5	kJ/mol	47.01403 ± 0.00061	256393-36-9*1
Water trimer		-762.75	-776.85	± 0.21	kJ/mol	54.04584 ± 0.00099	31014-12-7*0
Methylene		391.03	391.59	± 0.12	kJ/mol	14.02658 ± 0.00081	2465-56-7*0
Hydrazoic acid			272.61	± 0.48	kJ/mol	43.02816 ± 0.00022	7782-79-8*800
mu-Oxodichlorine cation		1130.44	1126.83	± 0.63	kJ/mol	86.9043 ± 0.0018	51174-96-0*0
Nitrogen atom		470.579	472.441	± 0.024	kJ/mol	14.006740 ± 0.000070	17778-88-0*1
mu-Oxodichlorate anion		-147.8	-147.7	± 2.5	kJ/mol	86.9053 ± 0.0018	365546-30-1*0
Polyoxymethylene			-170.89	± 0.21	kJ/mol	30.02598 ± 0.00087	9002-81-7*500
Trihydrogen cation		1110.304	1106.697	± 0.013	kJ/mol	3.02327 ± 0.00021	28132-48-1*2
Dioxaziridine		277.2	270.5	± 2.0	kJ/mol	47.01348 ± 0.00061	67394-35-8*0
Propylene cation		975.07	962.11	± 0.35	kJ/mol	42.0792 ± 0.0024	34504-10-4*0
Cyclopentadiene			108.73	± 0.61	kJ/mol	66.1011 ± 0.0040	542-92-7*590
Hydrogen iodide			-56.824	± 0.089	kJ/mol	127.912410 ± 0.000076	10034-85-2*800
Formaldehyde			-171.16	± 0.59	kJ/mol	30.02598 ± 0.00087	50-00-0*800
Ethynylene		820.28	826.85	± 0.27	kJ/mol	24.0214 ± 0.0016	12070-15-4*2
Dihydrogen anion		253.8	254.7	± 1.2	kJ/mol	2.01643 ± 0.00014	12184-89-3*0
Tetrabromomethane			49.0	± 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
Methyl bromide		-55.90	-58.92	± 0.28	kJ/mol	94.9385 ± 0.0013	74-83-9*590
Tetroxidane		-33.8	-44.3	± 2.4	kJ/mol	66.0135 ± 0.0012	29683-94-1*0
Dihydrogen cation		1488.364	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*2
Hydrogen peroxide		-129.492	-135.478	± 0.063	kJ/mol	34.01468 ± 0.00062	7722-84-1*2
Acetic acid			-484.91	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*833
Trioxirane cation		1444.6	1442.4	± 2.2	kJ/mol	47.99765 ± 0.00090	153851-84-40
Acetic acid			-484.96	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*850
Isocyanogen bromide anion		105.4	102.2	± 4.6	kJ/mol	105.9220 ± 0.0013	238754-53-50
Dioxofluorine anion		155.9	154.3	± 2.5	kJ/mol	50.99775 ± 0.00060	175861-93-50
Peroxyhypochlorous acid cation		1050.8	1045.1	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-22
1,2-Propadien-1-ylium-1-yl-3-ylidene		1947.0	1954.9	± 2.0	kJ/mol	36.0316 ± 0.0024	118090-85-0*0
Fluorine atom		77.253	79.038	± 0.048	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*1
1-Hydroxyethyl		-42.00	-55.43	± 0.65	kJ/mol	45.0605 ± 0.0017	2348-46-1*0
Hydroxylamine			-107.62	± 0.66	kJ/mol	33.02996 ± 0.00037	7803-49-8*500
Methyl formate		-344.73	-357.78	± 0.59	kJ/mol	60.0520 ± 0.0017	107-31-3*0
Oxygen atom pentacation		28708.788	28710.646	± 0.053	kJ/mol	15.99666 ± 0.00030	14127-66-3*0
Deuteride		146.991	148.904	± 0.0021	kJ/mol	2.01465035791 ± 0.00000000040	14452-69-8*0
Hydrogen peroxide cation		930.4	923.6	± 1.0	kJ/mol	34.01413 ± 0.00062	12325-10-9*22
Hydroxymethylene		112.70	108.94	± 0.28	kJ/mol	30.02598 ± 0.00087	19710-56-6*0
Chlorine atom		119.621	121.228	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*1
Ethyl bromide		-55.52	-91.05	± 0.27	kJ/mol	108.9651 ± 0.0019	74-96-4*500
Oxonium		605.84	599.09	± 0.17	kJ/mol	19.02267 ± 0.00037	13968-08-6*2
Vinyl iodide		139.7	130.8	± 1.2	kJ/mol	153.9497 ± 0.0016	593-66-8*0
Trihydrogen		215.9	218.3	± 1.1	kJ/mol	3.02382 ± 0.00021	12184-91-7*100
Peroxyhypochlorous acid anion		-2.9	-3.3	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-31
Hydrogen peroxide cation		896.57	889.59	± 0.58	kJ/mol	34.01413 ± 0.00062	12325-10-9*11
Tribromide			-129.29	± 0.26	kJ/mol	239.7125 ± 0.0030	14522-80-6*800
Chlorine trifluoride cation		1053.4	1049.1	± 2.5	kJ/mol	92.44736 ± 0.00090	478167-77-0*0
Oxygen atom octacation		197447.75	197449.60	± 0.12	kJ/mol	15.99501 ± 0.00030	21450-98-6*0
2-Chloro ozone		265.8	265.3	± 3.7	kJ/mol	83.4509 ± 0.0013	141801-66-30
Hydrazoic acid			257.62	± 0.48	kJ/mol	43.02816 ± 0.00022	7782-79-8*1000
Oxygen atom heptacation		113369.48	113371.34	± 0.12	kJ/mol	15.99556 ± 0.00030	14274-89-6*0
Acetaldehyde		-186.94	-191.66	± 0.33	kJ/mol	44.0526 ± 0.0017	75-07-0*500
Tetraoxodinitrate anion		-184.6	-187.8	± 2.4	kJ/mol	92.0116 ± 0.0012	63552-02-3*0
Tricarbon dioxide		-131.6	-116.5	± 1.4	kJ/mol	68.0309 ± 0.0025	504-64-3*500
Oxygen atom tetracation		17719.207	17721.064	± 0.025	kJ/mol	15.99721 ± 0.00030	14127-65-2*0
Cyclopropane cation		1022.3	1006.9	± 1.8	kJ/mol	42.0792 ± 0.0024	34496-93-0*0
Iodine atom		198.109	197.709	± 0.0021	kJ/mol	126.904470 ± 0.000030	14362-44-8*2
1,3-Butadiyn-4-ylium-1-yl		2109.9	2120.5	± 2.9	kJ/mol	48.0423 ± 0.0032	124708-46-9*0
m-Benzyne		614.6	605.2	± 1.4	kJ/mol	76.0960 ± 0.0048	1828-89-3*1
Bromodioxy		118.2	109.1	± 4.3	kJ/mol	111.9028 ± 0.0012	67177-47-3*0
Hydrogen fluoride			-321.13	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*906
Difluorodioxidanium		1287.2	1283.0	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-02
Iodine monochloride			-24.048	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*590
Oxoniumyl ion		978.464	975.561	± 0.029	kJ/mol	18.01473 ± 0.00033	56583-62-1*1
Dinitrogen dimer		-0.88	0.84	± 0.67	kJ/mol	56.02696 ± 0.00028	7727-37-90
Oxygen atom trication		10249.929	10252.880	± 0.018	kJ/mol	15.99775 ± 0.00030	14127-64-1*0
Trihydrogen		745.878	743.094	± 0.062	kJ/mol	3.02382 ± 0.00021	12184-91-7*1
Diatomic bromine cation		1060.32	1045.37	± 0.23	kJ/mol	159.8075 ± 0.0020	12595-71-0*0
Ammonium hydroxide			-366.726	± 0.062	kJ/mol	35.04584 ± 0.00047	1336-21-6*1000
1,3-Butadiynyl anion		677.7	686.8	± 1.2	kJ/mol	48.0433 ± 0.0032	59158-53-1*0
Difluorine cation		1514.301	1514.475	± 0.013	kJ/mol	37.9962578 ± 0.0000010	12184-86-0*0
Hydrazine monohydrate			-242.68	± 0.19	kJ/mol	50.06052 ± 0.00053	7803-57-8*500
Dihydrogen		-0.000	-0.058	± 0.000	kJ/mol	2.01588 ± 0.00014	1333-74-0*2
Nitrosyl nitrite anion		-100.3	-103.5	± 2.9	kJ/mol	76.01223 ± 0.00091	122413-35-82
Hypochloroperoxoous acid, hydroxy ester		49.5	42.6	± 2.5	kJ/mol	84.4588 ± 0.0013	928652-99-7*2
Methylaminyliumyl		1388.3	1382.0	± 2.6	kJ/mol	29.04071 ± 0.00083	56924-51-7*1
Acetylene anion		356.9	356.7	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*0
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
3H-Diazirin-3-ylidene		578.0	578.4	± 4.0	kJ/mol	40.02418 ± 0.00081	253308-70-2*0
Water		-286.308	-292.749	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*510
Tribromine cation		1035.9	1013.2	± 2.6	kJ/mol	239.7115 ± 0.0030	33105-86-1*0
Trioxygen difluoride		112.5	107.3	± 1.2	kJ/mol	85.99501 ± 0.00090	16829-28-0*0
Hydrazoic acid anion		316.2	310.0	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*2
Water		-238.938	-241.842	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*2
(Z)-1,2-Diiodoethene		215.71	207.43	± 0.44	kJ/mol	279.8462 ± 0.0016	590-26-1*0
(E)-1,2-Diiodoethene		214.82	207.43	± 0.44	kJ/mol	279.8462 ± 0.0016	590-27-2*0
Fluorosyl fluoride		227.	225.	± 21.	kJ/mol	53.99621 ± 0.00030	86825-57-2*2
Bicyclo[1.1.0]buta-1,3-dien-2-yl anion		803.6	811.3	± 2.1	kJ/mol	48.0433 ± 0.0032	289679-89-6*0
1,2-Dibromoethane			-79.5	± 1.3	kJ/mol	187.8612 ± 0.0026	106-93-4*500
Oxygen atom dication		4949.459	4953.000	± 0.013	kJ/mol	15.99830 ± 0.00030	14127-63-0*0
Deuterium molecule cation		1492.286	1492.361	± 0.000	kJ/mol	4.02765497609 ± 0.00000000080	12184-84-8*0
Hydroxymethylene cation		971.9	968.3	± 1.4	kJ/mol	30.02543 ± 0.00087	135395-06-1*0
Chlorine pentafluoride cation		1005.8	996.8	± 3.3	kJ/mol	130.44417 ± 0.00090	478167-78-1*0
Water dimer cation		556.8	546.3	± 3.0	kJ/mol	36.03001 ± 0.00066	158061-35-9*0
Hydroxymethylene anion		147.2	144.2	± 1.6	kJ/mol	30.02653 ± 0.00087	207914-87-2*0
Diazene cation		1132.46	1125.53	± 0.66	kJ/mol	30.02881 ± 0.00020	76986-17-9*1
Cyanogen iodide cation		1271.3	1271.2	± 1.6	kJ/mol	152.92136 ± 0.00080	34749-78-5*0
Peroxychlorous acid		96.2	90.6	± 2.1	kJ/mol	84.4588 ± 0.0013	177778-92-6*0
Oxirene		272.85	272.15	± 0.98	kJ/mol	42.0367 ± 0.0016	157-18-6*0
Nitrogen atom anion		487.6	489.9	± 2.5	kJ/mol	14.007289 ± 0.000070	17778-87-9*0
Chlorine chlorite		168.6	166.4	± 1.3	kJ/mol	102.9042 ± 0.0019	105206-44-8*0
Hydrogen cyanide anion		129.516	129.038	± 0.091	kJ/mol	27.02593 ± 0.00081	12334-27-9*0
2-Hydroxyethylium		1019.2	1007.0	± 1.7	kJ/mol	45.0600 ± 0.0017	38607-31-7*0
Dinitrogen dioxide		192.2	188.6	± 1.8	kJ/mol	60.01228 ± 0.00062	16824-89-8*1
Water anion		-50.1	-53.0	± 4.3	kJ/mol	18.01583 ± 0.00033	12259-30-2*0
Chlorohydroxymethyl		-54.7	-60.4	± 1.1	kJ/mol	65.4787 ± 0.0012	147139-06-8*0
Hydrazoic acid			261.48	± 0.65	kJ/mol	43.02816 ± 0.00022	7782-79-8*500
Isocyanic fluoride cation		1618.4	1619.0	± 4.0	kJ/mol	45.01529 ± 0.00080	16992-26-00
Methane anion		27.3	19.4	± 5.1	kJ/mol	16.04301 ± 0.00085	27680-53-1*0
Oxonium		605.90	599.09	± 0.17	kJ/mol	19.02267 ± 0.00037	13968-08-6*1
Carbon atom		1114.970	1120.117	± 0.048	kJ/mol	12.01070 ± 0.00080	7440-44-0*3
O--HH Complex		247.2	248.2	± 2.0	kJ/mol	18.01528 ± 0.00033	7732-18-5102
Isocyanic fluoride anion		74.3	76.0	± 5.7	kJ/mol	45.01639 ± 0.00080	357426-78-9*0
Nitrogen atom		700.554	702.457	± 0.024	kJ/mol	14.006740 ± 0.000070	17778-88-0*2
Hydrobromate ion		-5.7	-12.2	± 4.3	kJ/mol	80.9125 ± 0.0010	85532-97-4*0
Hydrogen peroxide			-190.78	± 0.30	kJ/mol	34.01468 ± 0.00062	7722-84-1*800
Fluoro(fluorooxy)methylene		-135.8	-137.0	± 2.1	kJ/mol	66.00691 ± 0.00085	479587-30-9*0
Trihydrogen		745.878	743.199	± 0.062	kJ/mol	3.02382 ± 0.00021	12184-91-7*0
Dichlorine cation		1108.287	1108.266	± 0.013	kJ/mol	70.9049 ± 0.0018	12595-90-3*0
Fluorosyl fluoride anion		-147.2	-146.9	± 3.0	kJ/mol	53.99675 ± 0.00030	86825-57-20
Formic acid cation		721.92	715.38	± 0.26	kJ/mol	46.0248 ± 0.0010	50614-05-6*0
(Methylamino)methyl anion		200.9	184.0	± 3.2	kJ/mol	44.0763 ± 0.0017	31277-25-50
Isocyanogen chloride anion		102.8	107.3	± 3.9	kJ/mol	61.4707 ± 0.0012	923019-39-0*0
Diazene anion		265.5	258.7	± 2.0	kJ/mol	30.02991 ± 0.00020	100429-75-2*0
Phosgene cation		897.1	896.0	± 1.7	kJ/mol	98.9150 ± 0.0020	73249-38-4*0
Phosgene			-242.72	± 0.27	kJ/mol	98.9155 ± 0.0020	75-44-5*501
Phosgene		-255.43	-242.72	± 0.27	kJ/mol	98.9155 ± 0.0020	75-44-5*502
Diiodine cation		963.523	960.408	± 0.018	kJ/mol	253.808391 ± 0.000060	28712-14-3*0
Chloro(chlorooxy)methylene		73.5	73.7	± 3.6	kJ/mol	98.9155 ± 0.0020	479587-31-0*0
Chloro(chlorooxy)methylene		112.	114.	± 16.	kJ/mol	98.9155 ± 0.0020	479587-31-0*1
Formic acid anion		-256.2	-262.3	± 1.8	kJ/mol	46.0259 ± 0.0010	19066-82-1*0
Methyl fluoride cation		981.81	974.32	± 0.62	kJ/mol	34.03237 ± 0.00083	59122-96-2*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
Methyl fluoride			-245.74	± 0.45	kJ/mol	34.03292 ± 0.00083	593-53-3*590
(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
O--HH Complex		247.6	248.9	± 2.7	kJ/mol	18.01528 ± 0.00033	7732-18-5101
Chloromethane		-105.96	-101.99	± 0.25	kJ/mol	50.4872 ± 0.0012	74-87-3*590
Chloroformyl anion		-356.5	-352.9	± 3.3	kJ/mol	63.4633 ± 0.0012	41976-93-6*0
Water		-286.310	-292.751	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*509
Diazene		207.09	199.96	± 0.44	kJ/mol	30.02936 ± 0.00020	3618-05-1*1
Fluorosyl fluoride cation		1413.0	1413.4	± 3.5	kJ/mol	53.99566 ± 0.00030	86825-50-50
Dinitrogen tetraoxide		-37.87	-27.02	± 0.19	kJ/mol	92.0111 ± 0.0012	10544-72-6*500
Nitrosyl nitrite anion		-103.1	-106.2	± 2.8	kJ/mol	76.01223 ± 0.00091	122413-35-80
Diazene anion		265.5	258.7	± 2.0	kJ/mol	30.02991 ± 0.00020	100429-75-2*1
Ethane anion		41.9	26.6	± 4.4	kJ/mol	30.0696 ± 0.0017	54064-82-3*0
(Dimethylamino)methyl anion		189.5	165.3	± 3.3	kJ/mol	58.1029 ± 0.0025	125231-49-4*0
2-Iodoethanol		-132.0	-150.2	± 2.5	kJ/mol	171.9650 ± 0.0017	624-76-0*0
Cyanogen chloride cation		1326.12	1327.45	± 0.97	kJ/mol	61.4696 ± 0.0012	37612-72-9*0
Propargylenide		434.5	437.7	± 1.1	kJ/mol	38.0485 ± 0.0024	82906-05-6*0
Hydroperoxonium		762.5	752.6	± 2.0	kJ/mol	35.02207 ± 0.00064	70850-26-9*2
Cyanogen		273.99	289.24	± 0.43	kJ/mol	52.0349 ± 0.0016	460-19-5*500
Hydrodioxonitrogen cation		1129.6	1123.0	± 3.2	kJ/mol	47.01293 ± 0.00061	252986-76-8*0
Methyl bromide cation		996.93	982.01	± 0.27	kJ/mol	94.9380 ± 0.0013	12538-70-4*0
Trihydrogen cation		1110.577	1106.695	± 0.013	kJ/mol	3.02327 ± 0.00021	28132-48-1*1
Isoformyl anion		55.8	58.4	± 1.8	kJ/mol	29.01859 ± 0.00086	81747-63-9*0
Chloroethane		-134.19	-135.81	± 0.20	kJ/mol	64.5138 ± 0.0019	75-00-3*500
Ethenol		-112.76	-123.18	± 0.84	kJ/mol	44.0526 ± 0.0017	557-75-5*0
Hydrogen peroxide cation		896.57	889.59	± 0.58	kJ/mol	34.01413 ± 0.00062	12325-10-9*0
Vinyl alcohol cation		778.9	768.0	± 1.4	kJ/mol	44.0520 ± 0.0017	57239-63-1*0
Methyl iodide cation		944.69	935.29	± 0.18	kJ/mol	141.93844 ± 0.00083	12538-72-6*0
Cyanogen chloride anion		46.7	51.1	± 3.1	kJ/mol	61.4707 ± 0.0012	12281-43-5*0
Oxoniumyl ion		978.714	975.563	± 0.029	kJ/mol	18.01473 ± 0.00033	56583-62-1*2
Isocyanogen anion		383.7	387.8	± 2.6	kJ/mol	52.0354 ± 0.0016	83951-85-30
Trihydrogen		254.5	250.7	± 1.2	kJ/mol	3.02382 ± 0.00021	12184-91-7*200
Hydrodioxonitrate		-62.4	-68.8	± 3.3	kJ/mol	47.01403 ± 0.00061	61508-71-2*0
Fluoroform			-704.21	± 0.47	kJ/mol	70.01385 ± 0.00080	75-46-7*590
Imidogen		358.74	358.79	± 0.17	kJ/mol	15.014680 ± 0.000099	13774-92-0*1
Difluorodioxidanium		1283.6	1280.0	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-00
Peroxyhypochlorous acid anion		-32.2	-34.0	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-30
Imidogen		509.34	509.39	± 0.18	kJ/mol	15.014680 ± 0.000099	13774-92-0*2
Carbonic acid		-602.74	-612.05	± 0.79	kJ/mol	62.0248 ± 0.0012	463-79-6*0
Diisocyanogen cation		1823.1	1826.1	± 3.5	kJ/mol	52.0343 ± 0.0016	78800-21-20
Diazenide		175.7	176.7	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*0
Fluorosyl fluoride		192.6	193.1	± 2.3	kJ/mol	53.99621 ± 0.00030	86825-57-2*0
Ethylene anion		232.1	225.6	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*0
Perchloric acid cation		1191.8	1182.2	± 3.5	kJ/mol	100.4577 ± 0.0015	91712-47-9*0
Ethynylene		827.45	834.15	± 0.27	kJ/mol	24.0214 ± 0.0016	12070-15-4*1
Hydrogen isocyanide anion		191.57	191.76	± 0.38	kJ/mol	27.02593 ± 0.00081	96913-22-3*0
Cyanic fluoride cation		1294.5	1294.9	± 1.1	kJ/mol	45.01529 ± 0.00080	62532-69-8*0
Bromine atom		162.001	155.939	± 0.056	kJ/mol	79.90400 ± 0.00100	10097-32-2*2
Isocyanogen chloride cation		1480.9	1482.1	± 3.9	kJ/mol	61.4696 ± 0.0012	956475-91-5*0
Isocyanogen bromide cation		1470.3	1464.6	± 5.9	kJ/mol	105.9209 ± 0.0013	238754-53-5*0
Hydroxyformyl		-181.19	-183.77	± 0.50	kJ/mol	45.0174 ± 0.0010	2564-86-5*0
Difluorodioxidane anion		-251.	-251.	± 28.	kJ/mol	69.99615 ± 0.00060	7783-45-10
Water		-238.654	-241.842	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*1
Hydroxyformyl anion		-319.50	-321.58	± 0.60	kJ/mol	45.0180 ± 0.0010	78944-70-4*0
Peroxychlorous acid		102.3	96.2	± 3.7	kJ/mol	84.4588 ± 0.0013	177778-92-6*3
Chlorine atom		130.176	131.783	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*2
Ethylidene		361.30	354.32	± 0.91	kJ/mol	28.0532 ± 0.0016	4218-50-2*0
Bromoform			3.0	± 1.3	kJ/mol	252.7306 ± 0.0031	75-25-2*590
Water		-286.310	-285.838	± 0.027	kJ/mol	18.01528 ± 0.00033	7732-18-5*499
Phenol cation		746.32	727.53	± 0.68	kJ/mol	94.1107 ± 0.0048	40932-22-7*0
Hydrogen peroxide cation		896.60	889.59	± 0.58	kJ/mol	34.01413 ± 0.00062	12325-10-9*12
Hydroperoxonium		738.1	727.8	± 1.2	kJ/mol	35.02207 ± 0.00064	70850-26-9*0
Oxonium			-285.836	± 0.027	kJ/mol	19.02267 ± 0.00037	13968-08-6*800
Hydroxyamidogen		101.6	94.8	± 1.1	kJ/mol	32.02202 ± 0.00034	13940-32-4*0
Cyclopropylium		1104.7	1093.3	± 4.1	kJ/mol	41.0713 ± 0.0024	1724-43-2*0
Benzaldehyde cation		896.9	880.2	± 1.9	kJ/mol	106.1214 ± 0.0056	80226-59-1*0
Benzaldehyde anion		-60.1	-77.7	± 1.2	kJ/mol	106.1225 ± 0.0056	34473-57-9*0
Methylene fluoride			-466.85	± 0.39	kJ/mol	52.02339 ± 0.00081	75-10-5*590
C=O-C cation		1575.8	1582.9	± 2.4	kJ/mol	40.0203 ± 0.0016	83483-98-1*0
Dioxyamidogen		251.1	244.5	± 2.5	kJ/mol	47.01348 ± 0.00061	71843-95-3*1
Hydroxyaminylium		1019.6	1012.5	± 2.5	kJ/mol	32.02147 ± 0.00034	66097-71-0*0
Hypochloroperoxoous acid, hydroxy ester		49.2	42.4	± 1.9	kJ/mol	84.4588 ± 0.0013	928652-99-7*0
2-Cyclopropyn-1-ylidene		899.2	906.1	± 1.6	kJ/mol	36.0321 ± 0.0024	102508-15-6*0
Cyclopropane			35.52	± 0.59	kJ/mol	42.0797 ± 0.0024	75-19-4*500
Trihydrogen		477.4	474.7	± 2.3	kJ/mol	3.02382 ± 0.00021	12184-91-7*201
Dinitrogen dioxide		172.88	171.12	± 0.14	kJ/mol	60.01228 ± 0.00062	16824-89-8*0
1,2-Propadien-1-yl-3-ylidene anion		621.9	629.3	± 1.3	kJ/mol	36.0326 ± 0.0024	109292-47-9*1
Cyanogen bromide cation		187.3	180.9	± 1.1	kJ/mol	105.9209 ± 0.0013	34749-77-4*0
Iminomethyl		275.83	272.23	± 0.71	kJ/mol	28.03332 ± 0.00082	15691-95-9*0
Cyanic fluoride anion		-20.4	-18.4	± 2.9	kJ/mol	45.01639 ± 0.00080	34507-50-1*0
Trioxygen difluoride		113.6	107.8	± 2.1	kJ/mol	85.99501 ± 0.00090	16829-28-0*2
Nitrosyl nitrite		93.0	88.1	± 1.3	kJ/mol	76.01168 ± 0.00091	122413-35-8*0
Trioxodinitrate anion		-104.9	-108.8	± 2.4	kJ/mol	76.01223 ± 0.00091	194856-62-7*0
Dioxymethylene		341.1	338.9	± 3.4	kJ/mol	45.0174 ± 0.0010	438586-67-5*0
Hydrogen peroxide cation		930.5	923.6	± 1.0	kJ/mol	34.01413 ± 0.00062	12325-10-9*21
Chlorous acid cation		996.6	991.6	± 3.1	kJ/mol	68.4589 ± 0.0011	99559-66-70
Chlorine pentafluoride anion		-619.3	-622.7	± 4.4	kJ/mol	130.44526 ± 0.00090	184851-42-1*0
Methanediol		-379.2	-392.6	± 1.1	kJ/mol	48.0413 ± 0.0010	463-57-0*0
Oxirene		388.7	385.4	± 2.6	kJ/mol	42.0367 ± 0.0016	157-18-6*1
Aminomethylidyne anion		481.6	478.0	± 3.2	kJ/mol	28.03387 ± 0.00082	96808-04-7*1
Fluorine atom		82.088	83.872	± 0.048	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*2
COC vdW		589.3	598.1	± 1.9	kJ/mol	40.0208 ± 0.0016	12071-24-80
Hydrazine anion		232.1	217.8	± 4.1	kJ/mol	32.04579 ± 0.00031	65391-88-0*0
Chlorine trifluoride anion		-480.4	-481.9	± 3.6	kJ/mol	92.44846 ± 0.00090	184289-50-7*0
Diazene cation		1132.46	1125.81	± 0.66	kJ/mol	30.02881 ± 0.00020	76986-17-9*0
Methyl nitrite		-52.46	-64.42	± 0.90	kJ/mol	61.0401 ± 0.0010	624-91-9*1
Methyl nitrite			-88.82	± 0.56	kJ/mol	61.0401 ± 0.0010	624-91-9*500
Hydrogen peroxide		-129.472	-135.478	± 0.063	kJ/mol	34.01468 ± 0.00062	7722-84-1*1
2,2,4-Trimethylpentane		-171.4	-223.8	± 1.5	kJ/mol	114.2285 ± 0.0065	540-84-1*0
Carbon atom		2.391	1.863	± 0.044	kJ/mol	12.01070 ± 0.00080	7440-44-0*501
Dinitrogen anion		192.5	192.5	± 1.7	kJ/mol	28.01403 ± 0.00014	12185-02-3*0
Nitrous acid anion		-107.0	-110.5	± 2.4	kJ/mol	47.01403 ± 0.00061	256393-36-9*0
Methylaminyliumyl		1388.3	1382.0	± 2.6	kJ/mol	29.04071 ± 0.00083	56924-51-7*0
Iminomethyl anion		237.4	233.6	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*0
Hydroperoxyimidogen		111.8	108.9	± 2.8	kJ/mol	47.01348 ± 0.00061	877456-58-1*2
Peroxyhypochlorous acid cation		1030.3	1024.5	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-20
Oxide		651.	653.	± 15.	kJ/mol	16.00050 ± 0.00030	16833-27-5*0
Succinic acid		-795.65	-817.79	± 0.61	kJ/mol	118.0880 ± 0.0034	110-15-6*0
Iodine monochloride		-36.511	-35.537	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*500
Dicarbon monoxide		377.3	381.3	± 1.1	kJ/mol	40.0208 ± 0.0016	12071-23-7*0
Peroxyformic acid		-279.8	-288.9	± 1.1	kJ/mol	62.0248 ± 0.0012	107-32-4*0
3-Chloro-3-methyl-3H-diazirine		230.	218.	± 40.	kJ/mol	90.5114 ± 0.0019	4222-21-3*0
Chlorous acid anion		-154.3	-156.2	± 3.3	kJ/mol	68.4600 ± 0.0011	99559-66-7*0
Trioxidaniumyl		925.7	916.8	± 1.5	kJ/mol	50.01353 ± 0.00091	161321-37-5*0
Diazene		207.09	199.96	± 0.44	kJ/mol	30.02936 ± 0.00020	3618-05-1*0
1,1-Dibromoethane			-66.4	± 1.4	kJ/mol	187.8612 ± 0.0026	557-91-5*500
Iodosyl ion		1066.1	1064.1	± 1.9	kJ/mol	142.90332 ± 0.00030	81182-81-2*0
Propynylidene		597.6	599.4	± 1.2	kJ/mol	38.0480 ± 0.0024	67152-18-5*2
Methoxycarbonyl		-150.1	-157.8	± 2.1	kJ/mol	59.0440 ± 0.0017	16481-04-2*0
Diazanide		249.4	239.3	± 3.1	kJ/mol	31.03785 ± 0.00025	25415-88-7*0
Hydrazoic acid anion		309.0	303.1	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*0
1,2-Dichloroethene		3.46	-1.86	± 0.56	kJ/mol	96.9427 ± 0.0024	540-59-0*0
(Formyloxy)methyl		-148.7	-156.8	± 1.7	kJ/mol	59.0440 ± 0.0017	3122-12-1*0
Methylaminyliumyl		1423.0	1416.1	± 2.6	kJ/mol	29.04071 ± 0.00083	56924-51-7*2
2-Hydroxyethyl		-12.84	-26.11	± 0.63	kJ/mol	45.0605 ± 0.0017	4422-54-2*0
Krypton dication		3701.124	3701.124	± 0.013	kJ/mol	83.7989 ± 0.1000	18469-91-5*0
Chloromethylene		320.24	320.53	± 0.89	kJ/mol	48.4713 ± 0.0012	2108-20-5*0
Xenon dication		3194.14	3194.14	± 0.36	kJ/mol	131.2889 ± 0.0200	14066-95-6*0
Dichloromethylene		229.49	230.67	± 0.65	kJ/mol	82.9161 ± 0.0020	1605-72-7*0
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	± 0.0011	kJ/mol	39.94745 ± 0.00100	14791-69-6*0
Argon dimer		-1.013	-6.347	± 0.0051	kJ/mol	79.8960 ± 0.0020	12595-59-4*0
Helium cation		2372.322	2372.322	± 0.000	kJ/mol	4.0020534 ± 0.0000020	14234-48-1*0
Helium dication		7622.839	7622.839	± 0.000	kJ/mol	4.0015048 ± 0.0000020	12587-46-1*0
Helium anion		51.	51.	± 130.	kJ/mol	4.0031506 ± 0.0000020	14452-58-5*1
Helium anion		51.	51.	± 130.	kJ/mol	4.0031506 ± 0.0000020	14452-58-5*0
Argon anion		23.	23.	± 75.	kJ/mol	39.94855 ± 0.00100	16544-90-4*1
Argon anion		23.	23.	± 75.	kJ/mol	39.94855 ± 0.00100	16544-90-4*0
Helium anion		1868.43	1868.43	± 0.11	kJ/mol	4.0031506 ± 0.0000020	14452-58-5*2
Helium anion		1904.823	1904.824	± 0.0011	kJ/mol	4.0031506 ± 0.0000020	14452-58-5*3
Helium anion		5724.9	5724.9	± 1.5	kJ/mol	4.0031506 ± 0.0000020	14452-58-5*4
Argon anion		1111.116	1111.116	± 0.098	kJ/mol	39.94855 ± 0.00100	16544-90-4*2
Hydron		0	0	exact		1.007391 ± 0.000070	12408-02-5*800

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

1		B. Ruscic, R. E. Pinzon, M. L. Morton, G. von Laszewski, S. Bittner, S. G. Nijsure, K. A. Amin, M. Minkoff, and A. F. Wagner, Introduction to Active Thermochemical Tables: Several "Key" Enthalpies of Formation Revisited. J. Phys. Chem. A 108, 9979-9997 (2004) [DOI: 10.1021/jp047912y]
2		B. Ruscic, R. E. Pinzon, G. von Laszewski, D. Kodeboyina, A. Burcat, D. Leahy, D. Montoya, and A. F. Wagner, Active Thermochemical Tables: Thermochemistry for the 21^st Century. J. Phys. Conf. Ser. 16, 561-570 (2005) [DOI: 10.1088/1742-6596/16/1/078]
3		B. Ruscic and D. H. Bross, Active Thermochemical Tables (ATcT) values based on ver. 1.122d of the Thermochemical Network, Argonne National Laboratory (2018); available at ATcT.anl.gov
4		B. Ruscic, Active Thermochemical Tables: Sequential Bond Dissociation Enthalpies of Methane, Ethane, and Methanol and the Related Thermochemistry. J. Phys. Chem. A 119, 7810-7837 (2015) [DOI: 10.1021/acs.jpca.5b01346]
5		T. L. Nguyen, J. H. Baraban, B. Ruscic, and J. F. Stanton, On the HCN – HNC Energy Difference. J. Phys. Chem. A 119, 10929-10934 (2015) [DOI: 10.1021/acs.jpca.5b08406]
6		L. Cheng, J. Gauss, B. Ruscic, P. Armentrout, and J. Stanton, Bond Dissociation Energies for Diatomic Molecules Containing 3d Transition Metals: Benchmark Scalar-Relativistic Coupled-Cluster Calculations for Twenty Molecules. J. Chem. Theory Comput. 13, 1044-1056 (2017) [DOI: 10.1021/acs.jctc.6b00970]
7		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 [7]).
Note that an uncertainty of ± 0.000 kJ/mol indicates that the estimated uncertainty is < ± 0.000₅ kJ/mol.

Website Functionality Credits

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

Acknowledgement

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

Page generated: 03/27/2025

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