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

Below is a list of 0 K and 298.15 K enthalpies of formation for all 2032 species included in version 1.122r.
This version of ATcT results was generated from an expansion of version 1.122q [4, 5] to include a non-rigid rotor anharmonic oscillator (NRRAO) partition function for hydroxymethyl [6], as well as data on 42 additional species, some of which are related to soot formation mechanisms.

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

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

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

Species:

(chemical formulas are case sensitive)

Exact Matches only:

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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		0	0	exact		12.01070 ± 0.00080	7440-44-0*500
Dinitrogen		0	0	exact		28.01348 ± 0.00014	7727-37-9*0
Dioxygen		0	0	exact		31.99880 ± 0.00060	7782-44-7*0
Difluorine		0	0	exact		37.9968064 ± 0.0000010	7782-41-4*0
Neon		0	0	exact		20.17970 ± 0.00060	7440-01-9*0
Silicon		0	0	exact		28.08550 ± 0.00030	7440-21-3*500
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		711.398	716.883	± 0.045	kJ/mol	12.01070 ± 0.00080	7440-44-0*0
Oxygen atom		246.844	249.229	± 0.0021	kJ/mol	15.99940 ± 0.00030	17778-80-2*0
Nitrogen atom		470.579	472.442	± 0.024	kJ/mol	14.006740 ± 0.000070	17778-88-0*0
Methane		-66.557	-74.526	± 0.049	kJ/mol	16.04246 ± 0.00085	74-82-8*0
Carbon dioxide		-393.110	-393.476	± 0.015	kJ/mol	44.00950 ± 0.00100	124-38-9*0
Ethane		-68.41	-84.04	± 0.13	kJ/mol	30.0690 ± 0.0017	74-84-0*0
Chlorine atom		119.621	121.302	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*0
Water		-286.298	-285.826	± 0.026	kJ/mol	18.01528 ± 0.00033	7732-18-5*500
Hydron		1528.084	1530.047	± 0.000	kJ/mol	1.007391 ± 0.000070	12408-02-5*0
Water		-238.929	-241.832	± 0.026	kJ/mol	18.01528 ± 0.00033	7732-18-5*0
Fluorine atom		77.258	79.364	± 0.047	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*0
Ethylene		60.84	52.32	± 0.12	kJ/mol	28.0532 ± 0.0016	74-85-1*0
Methyl		149.866	146.452	± 0.055	kJ/mol	15.03452 ± 0.00083	2229-07-4*0
Methanol		-190.03	-200.91	± 0.15	kJ/mol	32.04186 ± 0.00090	67-56-1*0
Bromine atom		117.917	111.855	± 0.056	kJ/mol	79.90400 ± 0.00100	10097-32-2*0
Propane		-82.78	-105.07	± 0.16	kJ/mol	44.0956 ± 0.0025	74-98-6*0
Hydroxyl		37.252	37.492	± 0.026	kJ/mol	17.00734 ± 0.00031	3352-57-6*0
Hydrogen chloride		-91.989	-92.173	± 0.0062	kJ/mol	36.46064 ± 0.00090	7647-01-0*0
Carbon monoxide		-113.804	-110.524	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*0
Formaldehyde		-105.376	-109.214	± 0.096	kJ/mol	30.02598 ± 0.00087	50-00-0*0
Ethanol		-217.32	-235.04	± 0.22	kJ/mol	46.0684 ± 0.0017	64-17-5*0
Ammonia		-38.565	-45.558	± 0.029	kJ/mol	17.03056 ± 0.00022	7664-41-7*0
Acetylene		228.84	228.28	± 0.13	kJ/mol	26.0373 ± 0.0016	74-86-2*0
Hydrogen fluoride		-272.674	-272.721	± 0.048	kJ/mol	20.006343 ± 0.000070	7664-39-3*0
Hydrogen bromide		-27.60	-35.45	± 0.14	kJ/mol	80.9119 ± 0.0010	10035-10-6*0
Iodine		107.157	106.757	± 0.0021	kJ/mol	126.904470 ± 0.000030	14362-44-8*0
Ethyl		131.07	119.99	± 0.25	kJ/mol	29.0611 ± 0.0016	2025-56-1*0
Hydrogen cyanide		129.665	129.280	± 0.089	kJ/mol	27.02538 ± 0.00081	74-90-8*0
Nitric oxide		90.631	91.135	± 0.066	kJ/mol	30.00614 ± 0.00031	10102-43-9*0
Chloromethane		-74.31	-82.24	± 0.25	kJ/mol	50.4872 ± 0.0012	74-87-3*0
Propene		34.89	19.88	± 0.19	kJ/mol	42.0797 ± 0.0024	115-07-1*0
Benzene		100.63	83.12	± 0.22	kJ/mol	78.1118 ± 0.0048	71-43-2*0
Propyne		192.70	185.64	± 0.22	kJ/mol	40.0639 ± 0.0024	74-99-7*0
Nitrogen dioxide		36.871	34.064	± 0.066	kJ/mol	46.00554 ± 0.00060	10102-44-0*0
Hydrogen iodide		28.646	26.471	± 0.036	kJ/mol	127.912410 ± 0.000076	10034-85-2*0
Hydroxyde		-139.089	-139.056	± 0.026	kJ/mol	17.00789 ± 0.00031	14280-30-9*0
Dioxidanyl		15.12	12.21	± 0.15	kJ/mol	33.00674 ± 0.00060	3170-83-0*0
Acetaldehyde		-155.06	-165.54	± 0.25	kJ/mol	44.0526 ± 0.0017	75-07-0*0
Fluoromethane		-227.46	-235.49	± 0.23	kJ/mol	34.03292 ± 0.00083	593-53-3*0
Hydrogen peroxide		-129.472	-135.458	± 0.063	kJ/mol	34.01468 ± 0.00062	7722-84-1*0
n-Butane		-98.44	-125.75	± 0.24	kJ/mol	58.1222 ± 0.0033	106-97-8*0
Allene		197.27	189.78	± 0.24	kJ/mol	40.0639 ± 0.0024	463-49-0*0
Bromomethane		-20.21	-35.61	± 0.26	kJ/mol	94.9385 ± 0.0013	74-83-9*0
Silicon		450.53	454.86	± 0.64	kJ/mol	28.08550 ± 0.00030	7440-21-3*0
Methylamine		-6.52	-21.23	± 0.24	kJ/mol	31.05714 ± 0.00088	74-89-5*0
Methylene		428.72	429.13	± 0.11	kJ/mol	14.02658 ± 0.00081	2465-56-7*2
Methylene		391.060	391.617	± 0.097	kJ/mol	14.02658 ± 0.00081	2465-56-7*1
Vinyl		301.21	297.01	± 0.31	kJ/mol	27.0452 ± 0.0016	2669-89-8*0
Formic acid		-371.09	-378.40	± 0.22	kJ/mol	46.0254 ± 0.0010	64-18-6*1
Methoxy		28.80	21.43	± 0.28	kJ/mol	31.03392 ± 0.00088	2143-68-2*0
Hypochlorous acid		-73.866	-76.805	± 0.027	kJ/mol	52.46004 ± 0.00095	7790-92-3*0
Tetrafluoromethane		-927.50	-933.47	± 0.25	kJ/mol	88.00431 ± 0.00080	75-73-0*0
Dibromine		45.68	30.89	± 0.12	kJ/mol	159.8080 ± 0.0020	7726-95-6*0
Acetone		-200.05	-216.74	± 0.35	kJ/mol	58.0791 ± 0.0025	67-64-1*0
Tetrachloromethane		-93.44	-95.61	± 0.43	kJ/mol	153.8215 ± 0.0037	56-23-5*0
Fluoride		-250.907	-249.122	± 0.047	kJ/mol	18.99895178 ± 0.00000050	16984-48-8*0
Diiodine		65.497	62.417	± 0.0041	kJ/mol	253.808940 ± 0.000060	7553-56-2*0
iso-Butane		-106.02	-134.62	± 0.30	kJ/mol	58.1222 ± 0.0033	75-28-5*0
1,3-Butadiene		125.38	110.90	± 0.33	kJ/mol	54.0904 ± 0.0032	106-99-0*0
Ketene		-45.35	-48.47	± 0.11	kJ/mol	42.0367 ± 0.0016	463-51-4*0
Chloroethane		-96.90	-111.49	± 0.26	kJ/mol	64.5138 ± 0.0019	75-00-3*0
Phenyl		350.67	337.31	± 0.51	kJ/mol	77.1039 ± 0.0048	2396-01-2*0
Hydroxymethyl		-10.44	-16.75	± 0.27	kJ/mol	31.03392 ± 0.00088	2597-43-5*0
Toluene		73.39	50.11	± 0.33	kJ/mol	92.1384 ± 0.0056	108-88-3*0
Methylidyne		592.825	596.159	± 0.097	kJ/mol	13.01864 ± 0.00080	3315-37-5*0
Methoxide		-122.59	-130.32	± 0.28	kJ/mol	31.03447 ± 0.00088	3315-60-4*0
Nitrilomethyl		436.76	440.04	± 0.14	kJ/mol	26.01744 ± 0.00080	2074-87-5*0
Acetonitrile		81.11	74.05	± 0.25	kJ/mol	41.0520 ± 0.0016	75-05-8*0
Silane		42.88	33.27	± 0.70	kJ/mol	32.11726 ± 0.00041	7803-62-5*0
Propargyl		353.94	351.35	± 0.33	kJ/mol	39.0559 ± 0.0024	2932-78-7*0
Ozone		144.397	141.735	± 0.039	kJ/mol	47.99820 ± 0.00090	10028-15-6*0
Acetic acid		-418.61	-432.73	± 0.38	kJ/mol	60.0520 ± 0.0017	64-19-7*1
Oxonium		605.85	599.10	± 0.17	kJ/mol	19.02267 ± 0.00037	13968-08-6*0
Fluoroform		-689.05	-696.00	± 0.41	kJ/mol	70.01385 ± 0.00080	75-46-7*0
Trifluoromethyl		-464.95	-467.75	± 0.45	kJ/mol	69.00591 ± 0.00080	2264-21-3*0
Ethylium		914.95	902.88	± 0.30	kJ/mol	29.0606 ± 0.0016	14936-94-8*0
Phenol		-74.74	-93.34	± 0.63	kJ/mol	94.1112 ± 0.0048	108-95-2*0
Chloride		-228.953	-227.346	± 0.0021	kJ/mol	35.45325 ± 0.00090	16887-00-6*0
Bromide		-206.619	-212.682	± 0.056	kJ/mol	79.90455 ± 0.00100	24959-67-9*0
Oxomethylium		827.770	827.185	± 0.096	kJ/mol	29.01749 ± 0.00086	17030-74-9*0
Hypobromous acid		-51.51	-61.99	± 0.47	kJ/mol	96.9113 ± 0.0010	13517-11-8*0
Amidogen		188.92	186.03	± 0.11	kJ/mol	16.02262 ± 0.00016	13770-40-6*0
Formyl		41.394	41.770	± 0.096	kJ/mol	29.01804 ± 0.00086	2597-44-6*0
Chlorooxidanyl		101.124	101.716	± 0.035	kJ/mol	51.45210 ± 0.00095	14989-30-1*0
Formamide		-178.57	-188.94	± 0.36	kJ/mol	45.04066 ± 0.00088	75-12-7*0
Methyl hydroperoxide		-114.92	-127.74	± 0.50	kJ/mol	48.0413 ± 0.0010	3031-73-0*0
Allyl		180.02	168.30	± 0.42	kJ/mol	41.0718 ± 0.0024	1981-80-2*0
Imidogen		358.74	358.79	± 0.16	kJ/mol	15.014680 ± 0.000099	13774-92-0*0
Dioxymethyl	$[O-]\[O+]=C$	111.95	104.95	± 0.62	kJ/mol	46.0254 ± 0.0010	56077-92-0*0
Cyanoacetylene		372.10	373.84	± 0.62	kJ/mol	51.0468 ± 0.0024	1070-71-9*0
Nitric acid		-124.50	-134.21	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*0
Ethoxide		-163.98	-178.92	± 0.46	kJ/mol	45.0610 ± 0.0017	16331-64-9*0
Ethenol		-113.11	-124.29	± 0.52	kJ/mol	44.0526 ± 0.0017	557-75-5*1
Vinyl chloride		29.28	21.70	± 0.30	kJ/mol	62.4979 ± 0.0018	75-01-4*0
Methylium		1099.339	1095.396	± 0.050	kJ/mol	15.03397 ± 0.00083	14531-53-4*0
Iodide		-187.995	-188.396	± 0.0021	kJ/mol	126.905019 ± 0.000030	20461-54-5*0
Cyanogen chloride		134.98	135.67	± 0.46	kJ/mol	61.4701 ± 0.0012	506-77-4*0
Methylperoxy		22.46	13.01	± 0.38	kJ/mol	47.0333 ± 0.0010	2143-58-0*0
Hydroxyformyl		-181.14	-184.10	± 0.44	kJ/mol	45.0174 ± 0.0010	2564-86-5*1
Isocyanic acid		-115.97	-118.96	± 0.28	kJ/mol	43.02478 ± 0.00086	75-13-8*0
Difluorophosgene		-603.34	-606.44	± 0.41	kJ/mol	66.00691 ± 0.00085	353-50-4*0
Vinylacetylene		296.17	289.41	± 0.58	kJ/mol	52.0746 ± 0.0032	689-97-4*0
Hypofluorous acid		-84.39	-87.29	± 0.19	kJ/mol	36.00574 ± 0.00031	14034-79-8*0
Hydrogen chloride			-166.452	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*834
Dichloromethane		-86.52	-93.38	± 0.52	kJ/mol	84.9320 ± 0.0020	75-09-2*0
1,3-Butadiyne		458.27	460.00	± 0.58	kJ/mol	50.0587 ± 0.0032	460-12-8*0
Chlorobenzene		67.15	52.20	± 0.61	kJ/mol	112.5566 ± 0.0049	108-90-7*0
Ethynyl		563.88	567.99	± 0.14	kJ/mol	25.0293 ± 0.0016	2122-48-7*0
Cyanogen bromide		187.1	180.5	± 1.1	kJ/mol	105.9214 ± 0.0013	506-68-3*0
Iodomethane		24.51	14.98	± 0.18	kJ/mol	141.93899 ± 0.00083	74-88-4*0
Oxygen atom anion		105.868	108.097	± 0.0021	kJ/mol	15.99995 ± 0.00030	14337-01-0*0
n-Propyl		118.26	100.85	± 0.51	kJ/mol	43.0877 ± 0.0024	2143-61-5*0
iso-Propyl		105.30	88.43	± 0.49	kJ/mol	43.0877 ± 0.0024	2025-55-0*0
Trihydrogen cation		1110.304	1106.696	± 0.013	kJ/mol	3.02327 ± 0.00021	28132-48-1*0
Acetyl		-3.62	-10.28	± 0.32	kJ/mol	43.0446 ± 0.0016	3170-69-2*0
Cyclopropene		292.27	283.54	± 0.47	kJ/mol	40.0639 ± 0.0024	2781-85-3*0
Cyclopentadiene		151.28	134.15	± 0.63	kJ/mol	66.1011 ± 0.0040	542-92-7*0
2-Hydroxyethyl		-13.37	-26.63	± 0.56	kJ/mol	45.0605 ± 0.0017	4422-54-2*1
Tetrabromomethane		133.5	103.8	± 1.3	kJ/mol	331.6267 ± 0.0041	558-13-4*0
Difluoromethane		-443.14	-450.76	± 0.33	kJ/mol	52.02339 ± 0.00081	75-10-5*0
Ethynide		277.43	280.84	± 0.18	kJ/mol	25.0299 ± 0.0016	29075-95-4*0
Oxygen difluoride		26.82	24.57	± 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
Nitrosyl hydride		109.94	106.97	± 0.11	kJ/mol	31.01408 ± 0.00032	14332-28-6*0
2-Butyne		159.43	146.47	± 0.49	kJ/mol	54.0904 ± 0.0032	503-17-3*0
Isocyanomethane		183.86	177.31	± 0.49	kJ/mol	41.0520 ± 0.0016	593-75-9*0
Cyclopropane		70.97	53.84	± 0.40	kJ/mol	42.0797 ± 0.0024	75-19-4*0
Propynylidene		543.45	546.45	± 0.65	kJ/mol	38.0480 ± 0.0024	67152-18-5*1
Butatriene		328.21	321.96	± 0.65	kJ/mol	52.0746 ± 0.0032	2873-50-9*0
Methoxymethane		-166.52	-184.02	± 0.40	kJ/mol	46.0684 ± 0.0017	115-10-6*0
Chloroform		-97.16	-102.07	± 0.50	kJ/mol	119.3767 ± 0.0028	67-66-3*0
Fluoromethylidyne		243.14	246.74	± 0.12	kJ/mol	31.00910 ± 0.00080	3889-75-6*0
Acrylonitrile		193.75	186.99	± 0.66	kJ/mol	53.0627 ± 0.0024	107-13-1*1
Silanol		-270.9	-282.6	± 1.3	kJ/mol	48.11666 ± 0.00051	14475-38-8*0
Oxygen atom cation		1560.786	1562.644	± 0.0021	kJ/mol	15.99885 ± 0.00030	14581-93-2*0
Nitrous acid		-72.991	-79.134	± 0.079	kJ/mol	47.01348 ± 0.00061	7782-77-6*1
1,2-Propadiene-1,3-diylidene		814.65	823.61	± 0.54	kJ/mol	36.0321 ± 0.0024	12075-35-3*0
Cyanic fluoride		8.76	9.09	± 0.69	kJ/mol	45.01584 ± 0.00080	1495-50-7*0
1-Hydroxyethyl		-42.79	-56.22	± 0.57	kJ/mol	45.0605 ± 0.0017	2348-46-1*1
Ethoxy		1.15	-12.76	± 0.45	kJ/mol	45.0605 ± 0.0017	2154-50-9*51
Formate		-463.23	-466.88	± 0.56	kJ/mol	45.0180 ± 0.0010	71-47-6*0
Methyl formate		-346.88	-359.93	± 0.84	kJ/mol	60.0520 ± 0.0017	107-31-3*1
Dimethylamine		4.08	-17.55	± 0.42	kJ/mol	45.0837 ± 0.0017	124-40-3*0
Tetrafluoroethylene		-670.99	-674.40	± 0.52	kJ/mol	100.0150 ± 0.0016	116-14-3*0
Chlorotrifluoromethane		-704.54	-709.65	± 0.57	kJ/mol	104.4586 ± 0.0012	75-72-9*0
Ethyl bromide		-41.12	-63.06	± 0.25	kJ/mol	108.9651 ± 0.0019	74-96-4*0
Vinyl bromide		88.70	73.90	± 0.57	kJ/mol	106.9492 ± 0.0019	593-60-2*0
Methanimine		96.48	88.57	± 0.40	kJ/mol	29.04126 ± 0.00083	2053-29-4*0
Methyl nitrite		-55.52	-67.30	± 0.45	kJ/mol	61.0401 ± 0.0010	624-91-9*2
Chlorine fluoride		-55.617	-55.712	± 0.053	kJ/mol	54.45110 ± 0.00090	7790-89-8*0
Diazynium		1042.43	1038.82	± 0.68	kJ/mol	29.02087 ± 0.00016	12357-66-3*0
Nitrite		-182.62	-185.42	± 0.46	kJ/mol	46.00609 ± 0.00060	14797-65-0*0
Hydroxylamine		-33.12	-43.50	± 0.45	kJ/mol	33.02996 ± 0.00037	7803-49-8*1
Hydride		143.264	145.228	± 0.000	kJ/mol	1.008489 ± 0.000070	12184-88-2*0
n-Butyl		102.78	80.28	± 0.71	kJ/mol	57.1143 ± 0.0033	2492-36-6*0
Methyl acetate		-394.22	-413.09	± 0.60	kJ/mol	74.0785 ± 0.0025	79-20-9*1
Phosgene		-217.45	-219.14	± 0.27	kJ/mol	98.9155 ± 0.0020	75-44-5*0
Vinyl fluoride		-134.61	-142.42	± 0.45	kJ/mol	46.0436 ± 0.0016	75-02-5*0
Phenylium		1148.55	1135.77	± 0.85	kJ/mol	77.1034 ± 0.0048	17333-73-2*0
Fluorooxidanyl		110.27	110.90	± 0.15	kJ/mol	34.99780 ± 0.00030	12061-70-0*0
Hypoiodous acid		-54.2	-58.9	± 3.1	kJ/mol	143.91181 ± 0.00031	14332-21-9*0
Methanium		921.96	911.71	± 0.44	kJ/mol	17.04985 ± 0.00087	15135-49-6*0
Oxirane		-40.07	-52.60	± 0.37	kJ/mol	44.0526 ± 0.0017	75-21-8*0
cis-2-Butene	$C/C=C\C$	14.23	-7.05	± 0.40	kJ/mol	56.1063 ± 0.0032	590-18-1*0
Formic acid		-354.75	-361.85	± 0.38	kJ/mol	46.0254 ± 0.0010	64-18-6*2
Cyanooxidanyl		126.93	127.41	± 0.33	kJ/mol	42.01684 ± 0.00086	22400-26-6*0
Methanetetraylbisamidogen		451.24	451.64	± 0.44	kJ/mol	40.02418 ± 0.00081	2669-76-3*0
Fluoroethane		-257.27	-272.13	± 0.36	kJ/mol	48.0595 ± 0.0016	353-36-6*0
Bromotrifluoromethane		-638.88	-651.00	± 0.44	kJ/mol	148.9099 ± 0.0013	75-63-8*0
Phenide		244.43	231.01	± 0.38	kJ/mol	77.1044 ± 0.0048	30922-78-2*0
Fluorobenzene		-99.08	-114.76	± 0.89	kJ/mol	96.1023 ± 0.0048	462-06-6*0
Nitromethane		-60.81	-74.71	± 0.46	kJ/mol	61.0401 ± 0.0010	75-52-5*0
Acrylonitrile		193.75	186.99	± 0.66	kJ/mol	53.0627 ± 0.0024	107-13-1*0
1,2,3-Butatrien-1-yl		497.34	497.36	± 0.70	kJ/mol	51.0666 ± 0.0032	22112-56-7*0
2,4-Hexadiyne		380.15	370.13	± 0.87	kJ/mol	78.1118 ± 0.0048	2809-69-0*0
Dioxygen cation		1164.585	1165.221	± 0.0092	kJ/mol	31.99825 ± 0.00060	12185-07-8*0
Ethynylene		820.33	828.80	± 0.26	kJ/mol	24.0214 ± 0.0016	12070-15-4*0
Methylidyne		664.60	667.93	± 0.54	kJ/mol	13.01864 ± 0.00080	3315-37-5*2
Ethanide		155.29	144.21	± 0.87	kJ/mol	29.0616 ± 0.0016	25013-41-6*0
Vinylium		1119.07	1115.63	± 0.55	kJ/mol	27.0447 ± 0.0016	14604-48-9*0
Vinyl anion		237.06	232.64	± 0.73	kJ/mol	27.0458 ± 0.0016	25012-81-1*0
Aminomethyl		159.27	149.42	± 0.37	kJ/mol	30.04920 ± 0.00085	10507-29-6*0
Cyanide		63.960	67.246	± 0.093	kJ/mol	26.01799 ± 0.00080	57-12-5*0
Cyanomethyl		263.39	260.51	± 0.68	kJ/mol	40.0440 ± 0.0016	2932-82-3*0
Peroxyformic acid		-279.24	-288.59	± 0.88	kJ/mol	62.0248 ± 0.0012	107-32-4*1
Propadienylidene		554.37	555.52	± 0.40	kJ/mol	38.0480 ± 0.0024	60731-10-4*0
Isobutene		4.06	-17.01	± 0.39	kJ/mol	56.1063 ± 0.0032	115-11-7*0
Cyclopentane		-43.85	-76.42	± 0.42	kJ/mol	70.1329 ± 0.0041	287-92-3*0
Phenolate		-146.59	-162.06	± 0.84	kJ/mol	93.1038 ± 0.0048	3229-70-7*0
Cyclopentadienyl		274.64	261.53	± 0.92	kJ/mol	65.0932 ± 0.0040	2143-53-5*0
Carbamoyl		-7.78	-14.18	± 0.74	kJ/mol	44.03272 ± 0.00087	2858-51-7*0
Tetrahedrane		547.7	539.3	± 1.2	kJ/mol	52.0746 ± 0.0032	157-39-1*0
Ethylamine		-28.26	-50.03	± 0.54	kJ/mol	45.0837 ± 0.0017	75-04-7*0
Chlorine dioxide		101.42	98.95	± 0.29	kJ/mol	67.4515 ± 0.0011	10049-04-4*0
Bromooxidanyl		131.16	123.62	± 0.28	kJ/mol	95.9034 ± 0.0010	15656-19-6*0
Hypobromite		-96.13	-103.61	± 0.53	kJ/mol	95.9039 ± 0.0010	14380-62-2*0
Ammonium		643.02	631.71	± 0.21	kJ/mol	18.03795 ± 0.00029	14798-03-9*0
(E)-Diazene		207.12	199.98	± 0.41	kJ/mol	30.02936 ± 0.00020	15626-43-4*0
Peroxynitrous acid		-5.80	-14.24	± 0.36	kJ/mol	63.01288 ± 0.00091	14691-52-2*3
Ethylidene		373.48	366.25	± 0.65	kJ/mol	28.0532 ± 0.0016	4218-50-2*2
Cyanogen		308.17	310.12	± 0.41	kJ/mol	52.0349 ± 0.0016	460-19-5*0
1-Butene		21.04	0.09	± 0.36	kJ/mol	56.1063 ± 0.0032	106-98-9*0
n-Pentane		-114.37	-146.25	± 0.31	kJ/mol	72.1488 ± 0.0041	109-66-0*0
n-Hexane		-130.02	-166.89	± 0.34	kJ/mol	86.1754 ± 0.0049	110-54-3*0
Trimethylamine		2.11	-26.74	± 0.76	kJ/mol	59.1103 ± 0.0025	75-50-3*0
Dichloromethylene		229.51	230.69	± 0.64	kJ/mol	82.9161 ± 0.0020	1605-72-7*2
Trifluoromethylium		409.53	406.32	± 0.46	kJ/mol	69.00536 ± 0.00080	18851-76-8*0
Hydrogen fluoride			-334.50	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*800
Ethyl nitrite		-81.38	-100.12	± 0.88	kJ/mol	75.0666 ± 0.0017	109-95-5*1
Water			-285.826	± 0.026	kJ/mol	18.01528 ± 0.00033	7732-18-5*590
Azido radical		452.28	449.70	± 0.60	kJ/mol	42.02022 ± 0.00021	12596-60-0*0
Nitrous oxide		86.000	82.571	± 0.097	kJ/mol	44.01288 ± 0.00033	10024-97-2*0
Hydroxyoxomethylium		600.66	597.57	± 0.44	kJ/mol	45.0169 ± 0.0010	638-71-1*0
Hydroxyamidogen		101.37	94.53	± 0.81	kJ/mol	32.02202 ± 0.00034	13940-32-4*1
Hydrazoic acid		297.93	291.63	± 0.49	kJ/mol	43.02816 ± 0.00022	7782-79-8*0
Ethylidene		361.20	354.20	± 0.51	kJ/mol	28.0532 ± 0.0016	4218-50-2*1
Vinylidene		411.19	412.10	± 0.30	kJ/mol	26.0373 ± 0.0016	2143-69-3*0
Acetylium		666.59	659.31	± 0.44	kJ/mol	43.0441 ± 0.0016	15762-07-9*0
Hydroxymethylium		717.68	709.74	± 0.18	kJ/mol	31.03337 ± 0.00088	18682-95-6*0
Fluoroacetylene		104.96	105.67	± 0.40	kJ/mol	44.0277 ± 0.0016	2713-09-9*0
Peroxyformyl		-100.37	-105.67	± 0.92	kJ/mol	61.0168 ± 0.0012	56240-83-6*1
trans-2-Butene		9.42	-11.14	± 0.38	kJ/mol	56.1063 ± 0.0032	624-64-6*0
1,2-Butadiene		175.91	162.41	± 0.46	kJ/mol	54.0904 ± 0.0032	590-19-2*0
Trioxidane		-82.01	-90.85	± 0.63	kJ/mol	50.01408 ± 0.00091	14699-99-1*1
Ketenyl		177.06	178.16	± 0.55	kJ/mol	41.0287 ± 0.0016	51095-15-9*0
Formic acid		-371.09	-378.38	± 0.22	kJ/mol	46.0254 ± 0.0010	64-18-6*0
Dioxidanide		-88.87	-91.53	± 0.35	kJ/mol	33.00729 ± 0.00060	14691-59-9*0
Acetic acid		-397.81	-411.59	± 0.53	kJ/mol	60.0520 ± 0.0017	64-19-7*2
Methyl formate		-326.7	-339.1	± 1.1	kJ/mol	60.0520 ± 0.0017	107-31-3*2
Trichloromethyl		72.01	71.54	± 0.84	kJ/mol	118.3688 ± 0.0028	3170-80-7*0
1,1-Dichloroethane		-120.29	-133.07	± 0.44	kJ/mol	98.9586 ± 0.0024	75-34-3*0
Difluorodioxidane		35.31	31.58	± 0.41	kJ/mol	69.99561 ± 0.00060	7783-44-0*0
Bromoform		75.7	49.6	± 1.3	kJ/mol	252.7306 ± 0.0031	75-25-2*0
Bromobenzene		126.7	104.6	± 1.3	kJ/mol	157.0079 ± 0.0049	108-86-1*0
Benzaldehyde		-19.28	-37.07	± 0.91	kJ/mol	106.1219 ± 0.0056	100-52-7*0
Propionaldehyde		-171.36	-186.77	± 0.25	kJ/mol	58.0791 ± 0.0025	123-38-6*0
Nitrosomethane		80.78	70.87	± 0.91	kJ/mol	45.04066 ± 0.00088	865-40-7*0
Isocyanoacetylene		484.7	486.9	± 1.0	kJ/mol	51.0468 ± 0.0024	66723-45-3*0
Silanone		-93.6	-98.9	± 1.1	kJ/mol	46.10078 ± 0.00045	22755-01-7*0
Silyloxy		8.5	0.5	± 1.5	kJ/mol	47.10872 ± 0.00047	81429-20-1*0
Chlorous acid		25.79	20.74	± 0.63	kJ/mol	68.4594 ± 0.0011	13898-47-0*0
Iodooxidanyl		126.99	125.06	± 0.82	kJ/mol	142.90387 ± 0.00030	14696-98-1*0
Carbon monoxide cation		1238.306	1241.585	± 0.026	kJ/mol	28.00955 ± 0.00085	12144-04-6*0
Azanide		114.82	111.94	± 0.29	kJ/mol	16.02317 ± 0.00016	17655-31-1*0
Hydrazine		111.72	97.57	± 0.42	kJ/mol	32.04524 ± 0.00031	302-01-2*0
Aminooxy		70.93	64.32	± 0.71	kJ/mol	32.02202 ± 0.00034	13408-29-2*0
Nitrate		-300.33	-306.88	± 0.60	kJ/mol	62.00549 ± 0.00090	14797-55-8*0
Fluorodioxidanyl		26.88	25.17	± 0.26	kJ/mol	50.99720 ± 0.00060	15499-23-7*0
Cyanogen iodide		222.6	222.0	± 1.6	kJ/mol	152.92191 ± 0.00080	506-78-5*0
Formyl anion		11.60	11.98	± 0.44	kJ/mol	29.01859 ± 0.00086	57340-31-5*0
1-Methylethenyl		263.07	252.68	± 0.67	kJ/mol	41.0718 ± 0.0024	15552-77-9*0
1,2-Propadienyl anion		265.76	262.70	± 0.67	kJ/mol	39.0565 ± 0.0024	64066-06-4*0
2-Propynylidyne		718.01	722.36	± 0.80	kJ/mol	37.0400 ± 0.0024	53590-28-6*0
neo-Pentane		-134.52	-167.39	± 0.39	kJ/mol	72.1488 ± 0.0041	463-82-1*0
Hypofluorite		-108.84	-108.67	± 0.48	kJ/mol	34.99835 ± 0.00030	12763-66-5*0
Ethoxy		5.42	-9.02	± 0.45	kJ/mol	45.0605 ± 0.0017	2154-50-9*52
Dicarbon monoxide		377.12	381.16	± 0.83	kJ/mol	40.0208 ± 0.0016	12071-23-7*1
1-Propanol		-231.40	-255.24	± 0.25	kJ/mol	60.0950 ± 0.0025	71-23-8*0
Chloromethylene		320.27	320.55	± 0.89	kJ/mol	48.4713 ± 0.0012	2108-20-5*2
Dibromomethane		26.0	4.6	± 1.1	kJ/mol	173.8346 ± 0.0022	74-95-3*0
1,1-Difluoroethene		-343.58	-350.64	± 0.77	kJ/mol	64.0341 ± 0.0016	75-38-7*0
3-Buten-2-one		-95.49	-111.73	± 0.87	kJ/mol	70.0898 ± 0.0032	78-94-4*1
Urea		-218.22	-234.62	± 0.42	kJ/mol	60.05534 ± 0.00091	57-13-6*0
Oxomethaniminium		695.30	688.74	± 0.90	kJ/mol	44.03217 ± 0.00087	59348-22-0*0
Acetamide		-219.62	-237.13	± 0.57	kJ/mol	59.0672 ± 0.0017	60-35-5*0
Cyclobutadiene		436.50	428.05	± 0.79	kJ/mol	52.0746 ± 0.0032	1120-53-2*0
1,3-Hexadiyne		405.04	393.34	± 0.98	kJ/mol	78.1118 ± 0.0048	4447-21-6*0
Iodine monochloride		19.024	17.391	± 0.013	kJ/mol	162.35717 ± 0.00090	7790-99-0*0
Iodotrifluoromethane		-583.45	-589.33	± 0.49	kJ/mol	195.91038 ± 0.00080	2314-97-8*0
Trinitrogen cation		1519.44	1516.81	± 0.89	kJ/mol	42.01967 ± 0.00021	12185-03-4*0
Oxonitrate anion		88.11	88.14	± 0.25	kJ/mol	30.00669 ± 0.00031	14967-78-3*0
Nitrosyl ion		984.499	984.494	± 0.066	kJ/mol	30.00559 ± 0.00031	14452-93-8*0
Nitrogen sesquioxide		90.75	86.18	± 0.15	kJ/mol	76.01168 ± 0.00091	10544-73-7*0
Methylene anion		328.17	328.60	± 0.18	kJ/mol	14.02713 ± 0.00081	50928-07-9*0
Methylidyne anion		475.74	479.07	± 0.22	kJ/mol	13.01919 ± 0.00080	28604-54-8*0
Ethanium		874.32	858.05	± 0.62	kJ/mol	31.0764 ± 0.0017	24669-33-8*1
Hydrogen isocyanide		192.05	192.43	± 0.33	kJ/mol	27.02538 ± 0.00081	6914-07-4*0
Hydroxymethylene		112.68	108.91	± 0.27	kJ/mol	30.02598 ± 0.00087	19710-56-6*1
Carbonic acid		-602.73	-612.90	± 0.75	kJ/mol	62.0248 ± 0.0012	463-79-6*1
Peroxyformate		-340.91	-346.36	± 0.95	kJ/mol	61.0174 ± 0.0012	104960-05-6*1
Isoprene		96.12	75.60	± 0.67	kJ/mol	68.1170 ± 0.0040	78-79-5*0
1-Hydroxyethylium		608.75	594.32	± 0.39	kJ/mol	45.0600 ± 0.0017	18682-96-7*1
Chlorine trifluoride		-158.6	-162.7	± 1.2	kJ/mol	92.44791 ± 0.00090	7790-91-2*0
Ethynol		95.31	92.82	± 0.80	kJ/mol	42.0367 ± 0.0016	32038-79-2*2
Formyloxidanyl		-125.90	-127.56	± 0.56	kJ/mol	45.0174 ± 0.0010	16499-21-1*1
Chloronium		881.3	878.2	± 1.1	kJ/mol	37.46803 ± 0.00091	36658-55-6*0
Glyoxal		-207.71	-213.35	± 0.61	kJ/mol	58.0361 ± 0.0017	107-22-2*1
1,1,1-Trichloroethane		-134.33	-144.90	± 0.48	kJ/mol	133.4033 ± 0.0031	71-55-6*0
Tetrachloroethene		-22.3	-23.2	± 1.1	kJ/mol	165.8322 ± 0.0039	127-18-4*0
Chlorodifluoromethane		-476.01	-482.21	± 0.98	kJ/mol	86.4681 ± 0.0012	75-45-6*0
Fluoromethylene		148.39	148.67	± 0.43	kJ/mol	32.01704 ± 0.00080	13453-52-6*2
Fluoroformyl		-176.61	-176.03	± 0.37	kJ/mol	47.00850 ± 0.00085	1871-24-5*0
2-Bromoethanol		-196.15	-220.21	± 0.53	kJ/mol	124.9645 ± 0.0019	540-51-2*0
Carbon suboxide		-94.9	-92.8	± 1.2	kJ/mol	68.0309 ± 0.0025	504-64-3*0
Benzyl		230.05	211.24	± 0.56	kJ/mol	91.1305 ± 0.0056	2154-56-5*0
Phenoxy		70.87	55.58	± 0.84	kJ/mol	93.1033 ± 0.0048	2122-46-5*0
1-Cyanovinyl		419.0	418.9	± 1.1	kJ/mol	52.0547 ± 0.0024	15091-87-9*0
Cyanomethylene		479.9	483.3	± 1.1	kJ/mol	39.0361 ± 0.0016	2612-62-6*1
3-Methylenecyclopropene		395.82	387.88	± 0.85	kJ/mol	52.0746 ± 0.0032	4095-06-1*0
Phenylperoxy		153.1	136.1	± 1.4	kJ/mol	109.1027 ± 0.0049	91422-02-5*0
Trimethylsilane		-124.6	-150.7	± 1.6	kJ/mol	74.1970 ± 0.0025	993-07-7*0
Hydrogen bromide			-120.59	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*800
Hydrogen peroxide cation		897.23	890.25	± 0.51	kJ/mol	34.01413 ± 0.00062	12325-10-9*1
Bromonium		925.3	914.6	± 1.5	kJ/mol	81.9193 ± 0.0010	36658-54-5*0
Methanide		141.10	137.66	± 0.24	kJ/mol	15.03507 ± 0.00083	15194-58-8*0
Methyliumyl		1393.19	1394.05	± 0.11	kJ/mol	14.02603 ± 0.00081	15091-72-2*0
Ethylidyne		640.7	636.1	± 1.1	kJ/mol	27.0452 ± 0.0016	67624-57-1*2
Aminomethylium		763.98	752.01	± 0.64	kJ/mol	30.04865 ± 0.00085	488821-23-4*0
Isocyanomethanide		254.04	251.00	± 0.96	kJ/mol	40.0446 ± 0.0016	81704-80-5*0
1-Methylethylidene		315.91	302.01	± 0.99	kJ/mol	42.0797 ± 0.0024	40852-89-9*2
1-Butyne		180.26	166.68	± 0.67	kJ/mol	54.0904 ± 0.0032	107-00-6*0
Trioxidanide		-120.0	-123.1	± 1.6	kJ/mol	49.00669 ± 0.00090	89965-38-8*2
iso-Pentane		-119.12	-153.17	± 0.43	kJ/mol	72.1488 ± 0.0041	78-78-4*0
Cyclohexane		-83.37	-122.94	± 0.30	kJ/mol	84.1595 ± 0.0049	110-82-7*0
1-Hydroxyethyl		-41.35	-54.82	± 0.79	kJ/mol	45.0605 ± 0.0017	2348-46-1*2
Protonated oxirane		725.57	709.40	± 0.62	kJ/mol	45.0600 ± 0.0017	38607-31-70
Methanediol		-379.36	-393.56	± 0.92	kJ/mol	48.0413 ± 0.0010	463-57-0*1
Methoxyethane		-194.43	-217.32	± 0.58	kJ/mol	60.0950 ± 0.0025	540-67-0*0
Cyanic acid		-12.34	-15.06	± 0.43	kJ/mol	43.02478 ± 0.00086	420-05-3*0
Fulminic acid		170.70	169.25	± 0.44	kJ/mol	43.02478 ± 0.00086	51060-05-0*0
Isofulminic acid		235.22	233.52	± 0.43	kJ/mol	43.02478 ± 0.00086	506-85-4*0
Nitrosomethylidyne		389.3	390.7	± 1.1	kJ/mol	42.01684 ± 0.00086	82267-15-0*0
Acetic acid		-418.61	-432.74	± 0.38	kJ/mol	60.0520 ± 0.0017	64-19-7*0
Hydrogen chloride			-166.992	± 0.023	kJ/mol	36.46064 ± 0.00090	7647-01-0*800
Acetyl chloride		-232.58	-241.57	± 0.33	kJ/mol	78.4973 ± 0.0019	75-36-5*0
Chlorohydroxymethyl		-54.7	-60.8	± 1.1	kJ/mol	65.4787 ± 0.0012	147139-06-8*1
1,1-Dichloroethene		8.94	2.95	± 0.49	kJ/mol	96.9427 ± 0.0024	75-35-4*0
Dichlorodifluoromethane		-489.47	-493.65	± 0.67	kJ/mol	120.9129 ± 0.0020	75-71-8*0
Fluorodichloromethane		-278.14	-283.59	± 0.91	kJ/mol	102.9224 ± 0.0020	75-43-4*0
Difluoromethylene		-193.89	-193.42	± 0.36	kJ/mol	50.00751 ± 0.00080	2154-59-8*2
Fluoromethylene		210.36	210.70	± 0.66	kJ/mol	32.01704 ± 0.00080	13453-52-6*1
Formyl fluoride		-378.63	-382.22	± 0.31	kJ/mol	48.01644 ± 0.00086	1493-02-3*0
Propyl nitrite		-96.1	-121.1	± 1.8	kJ/mol	89.0932 ± 0.0025	543-67-9*1
2-Cyanovinyl		448.0	445.5	± 1.2	kJ/mol	52.0547 ± 0.0024	189141-20-6*2
1,2,3-Butatrien-1-ylium		1271.7	1269.9	± 1.1	kJ/mol	51.0661 ± 0.0032	81932-79-8*2
1-Buten-3-yn-1-yl		547.17	544.51	± 0.88	kJ/mol	51.0666 ± 0.0032	2810-61-9*1
Silyl		204.6	199.2	± 1.1	kJ/mol	31.10932 ± 0.00037	13765-44-1*0
Hydroxysilyl		-104.2	-112.1	± 1.6	kJ/mol	47.10872 ± 0.00047	113648-09-2*0
Trimethylsilanol		-464.5	-490.8	± 1.9	kJ/mol	90.1964 ± 0.0025	1066-40-6*0
2-Propanamine		-56.78	-83.57	± 0.53	kJ/mol	59.1103 ± 0.0025	75-31-0*0
Hypoiodite		-102.46	-104.27	± 0.88	kJ/mol	142.90442 ± 0.00030	15065-65-3*0
Dinitrogen cation		1503.311	1503.312	± 0.000	kJ/mol	28.01293 ± 0.00014	13966-04-6*0
Carbon dioxide cation		936.091	936.926	± 0.017	kJ/mol	44.00895 ± 0.00100	12181-61-2*0
Ammonium			-133.075	± 0.056	kJ/mol	18.03795 ± 0.00029	14798-03-9*800
Hydrazino		234.77	224.25	± 0.69	kJ/mol	31.03730 ± 0.00025	13598-46-4*0
Methylamidogen		187.58	176.93	± 0.46	kJ/mol	30.04920 ± 0.00085	15622-51-2*0
Methyleneamidogen		242.00	238.35	± 0.58	kJ/mol	28.03332 ± 0.00082	15845-29-1*0
(E)-Iminomethyl		275.79	272.18	± 0.61	kJ/mol	28.03332 ± 0.00082	54980-10-8*0
Hydrogen isocyanide cation		1351.51	1351.47	± 0.84	kJ/mol	27.02483 ± 0.00081	74158-11-5*0
Chloroacetylene		228.13	228.99	± 0.70	kJ/mol	60.4820 ± 0.0018	593-63-5*0
Dichloride		-229.8	-228.7	± 1.4	kJ/mol	70.9059 ± 0.0018	12595-89-0*0
iso-Propylium		822.88	805.80	± 0.24	kJ/mol	43.0871 ± 0.0024	19252-53-0*0
Chlorine atom cation		1370.806	1372.602	± 0.0011	kJ/mol	35.45215 ± 0.00090	24203-47-2*0
n-Propylide		122.9	105.3	± 1.2	kJ/mol	43.0882 ± 0.0024	59513-13-2*0
Hydroperoxonium		738.1	727.8	± 1.2	kJ/mol	35.02207 ± 0.00064	70850-26-9*1
1-Propenyl		278.31	267.47	± 0.75	kJ/mol	41.0718 ± 0.0024	6067-68-1*2
Propargylenide		434.4	436.9	± 1.1	kJ/mol	38.0485 ± 0.0024	82906-05-6*1
t-Butyl		75.08	49.78	± 0.77	kJ/mol	57.1143 ± 0.0033	1605-73-8*0
Cyclobutane		52.35	27.81	± 0.39	kJ/mol	56.1063 ± 0.0032	287-23-0*0
Cyclobutene		177.65	160.60	± 0.71	kJ/mol	54.0904 ± 0.0032	822-35-5*0
2-Butynyl		318.07	310.70	± 0.79	kJ/mol	53.0825 ± 0.0032	82252-88-8*0
2-Hydroxyethyl		-10.84	-23.47	± 0.82	kJ/mol	45.0605 ± 0.0017	4422-54-2*2
Ketene		182.0	177.0	± 1.1	kJ/mol	42.0367 ± 0.0016	463-51-4*1
Chloro hypochlorite		79.78	77.97	± 0.36	kJ/mol	86.9048 ± 0.0018	7791-21-1*0
Oxoethylidene		261.1	257.6	± 1.1	kJ/mol	42.0367 ± 0.0016	39920-84-8*12
Methanediol		-369.05	-382.21	± 0.95	kJ/mol	48.0413 ± 0.0010	463-57-0*2
Methoxyethene		-89.3	-107.1	± 1.1	kJ/mol	58.0791 ± 0.0025	107-25-5*2
Methyl acetate		-363.4	-382.1	± 1.2	kJ/mol	74.0785 ± 0.0025	79-20-9*2
Carboxymethyl		-227.2	-237.0	± 1.2	kJ/mol	59.0440 ± 0.0017	2887-46-9*1
(Methylamino)methyl		167.93	151.48	± 0.95	kJ/mol	44.0758 ± 0.0017	31277-24-4*0
Dimethylamidogen		173.9	156.6	± 1.5	kJ/mol	44.0758 ± 0.0017	15337-44-7*0
Cyanoamidogen		322.94	320.45	± 0.84	kJ/mol	41.03212 ± 0.00082	12347-01-2*0
Bromotrichloromethane		-32.75	-41.89	± 0.59	kJ/mol	198.2728 ± 0.0030	75-62-7*0
Chloromethylidyne		430.43	434.18	± 0.67	kJ/mol	47.4634 ± 0.0012	3889-76-7*0
Chlorine pentafluoride		-226.1	-234.2	± 1.7	kJ/mol	130.44472 ± 0.00090	13637-63-3*0
Chloromethanol		-232.2	-242.5	± 1.2	kJ/mol	66.4866 ± 0.0013	15454-33-8*0
Chloromethoxy		-11.9	-18.7	± 1.1	kJ/mol	65.4787 ± 0.0012	114282-89-2*0
Tetraiodomethane		332.2	327.1	± 4.1	kJ/mol	519.62858 ± 0.00081	507-25-5*0
Fluorotrichloromethane		-285.28	-288.43	± 0.78	kJ/mol	137.3672 ± 0.0028	75-69-4*0
Chlorooxy hypochlorite		134.56	131.33	± 0.56	kJ/mol	102.9042 ± 0.0019	12292-23-8*0
2-Chloroethanol		-249.80	-266.52	± 0.59	kJ/mol	80.5132 ± 0.0019	107-07-3*0
o-Benzyne		468.12	459.20	± 0.87	kJ/mol	76.0960 ± 0.0048	462-80-6*2
Tropyl		295.8	278.4	± 1.1	kJ/mol	91.1305 ± 0.0056	3551-27-7*0
Iodobenzene		177.82	161.83	± 0.99	kJ/mol	204.0084 ± 0.0048	591-50-4*0
Acetonyl		-19.01	-31.72	± 0.98	kJ/mol	57.0712 ± 0.0024	3122-07-4*0
Trifluoroethene		-493.1	-498.1	± 1.6	kJ/mol	82.0245 ± 0.0016	359-11-5*0
Isocyanoethene		285.14	278.64	± 0.94	kJ/mol	53.0627 ± 0.0024	14668-82-7*0
1-Isocyanoethylidene		527.8	523.1	± 1.1	kJ/mol	53.0627 ± 0.0024	498544-34-62
3-Methylene-1-cyclopropen-1-yl		628.1	625.5	± 1.1	kJ/mol	51.0666 ± 0.0032	127611-24-9*0
Peroxyhypochlorous acid		3.95	-1.32	± 0.95	kJ/mol	68.4594 ± 0.0011	67952-07-2*0
Fulvene		231.9	215.8	± 1.1	kJ/mol	78.1118 ± 0.0048	497-20-1*0
Oxosilylene		-98.11	-96.95	± 0.65	kJ/mol	44.08490 ± 0.00042	10097-28-6*0
Silyloxy anion		-311.7	-321.1	± 1.6	kJ/mol	47.10927 ± 0.00047	43336-62-5*0
1-Propanamine		-42.36	-70.10	± 0.42	kJ/mol	59.1103 ± 0.0025	107-10-8*0
Perchloryl		191.82	186.15	± 0.62	kJ/mol	83.4509 ± 0.0013	13932-10-0*0
Dioxodiazoxane		93.0	87.9	± 1.3	kJ/mol	76.01168 ± 0.00091	122413-35-8*1
Nitric acid			-206.64	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*800
Isodiazene		307.54	300.46	± 0.63	kJ/mol	30.02936 ± 0.00020	28647-38-3*0
Oxoammoniumyl		1092.47	1089.54	± 0.67	kJ/mol	31.01353 ± 0.00032	63559-87-5*0
Nitryl hydride		-36.6	-43.6	± 1.1	kJ/mol	47.01348 ± 0.00061	90266-90-3*0
Peroxynitrous acid		7.78	0.70	± 0.41	kJ/mol	63.01288 ± 0.00091	14691-52-2*1
Carbon anion		589.621	594.768	± 0.046	kJ/mol	12.01125 ± 0.00080	14337-00-9*0
Chlorate		-207.2	-212.7	± 1.6	kJ/mol	83.4514 ± 0.0013	14866-68-3*0
Ethylidyne		508.53	504.83	± 0.80	kJ/mol	27.0452 ± 0.0016	67624-57-1*0
Ethynylium		1687.59	1690.93	± 0.16	kJ/mol	25.0288 ± 0.0016	16456-59-0*0
Methylamidogen anion		145.35	134.52	± 0.65	kJ/mol	30.04975 ± 0.00085	54448-39-4*0
Iminomethylium		953.3	949.3	± 1.4	kJ/mol	28.03277 ± 0.00082	196216-36-1*0
Hydrogen fluoride			-321.05	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*818
Methylperoxy anion		-89.81	-99.96	± 0.58	kJ/mol	47.0339 ± 0.0010	35683-44-4*0
Propylidyne		492.5	482.8	± 1.2	kJ/mol	41.0718 ± 0.0024	85056-54-8*1
Trioxidane		-72.74	-81.23	± 0.82	kJ/mol	50.01408 ± 0.00091	14699-99-1*2
Cyclopropylidene		474.87	466.84	± 0.85	kJ/mol	40.0639 ± 0.0024	2143-70-6*1
Propargylium		1193.42	1190.60	± 0.33	kJ/mol	39.0554 ± 0.0024	21540-27-2*0
Cycloprop-1-enyl		527.35	522.96	± 0.59	kJ/mol	39.0559 ± 0.0024	19528-44-0*0
Propargylenide		436.9	439.4	± 1.1	kJ/mol	38.0485 ± 0.0024	82906-05-6*2
2-Propyn-1-ylium-1-ylidene		1598.1	1602.5	± 1.3	kJ/mol	37.0395 ± 0.0024	75104-46-0*0
Chloric acid		2.2	-4.9	± 1.6	kJ/mol	84.4588 ± 0.0013	7790-93-4*0
Cyclopentene		59.43	35.17	± 0.47	kJ/mol	68.1170 ± 0.0040	142-29-0*0
n-Heptane		-145.58	-187.46	± 0.46	kJ/mol	100.2019 ± 0.0057	142-82-5*0
n-Octane		-161.25	-208.08	± 0.54	kJ/mol	114.2285 ± 0.0065	111-65-9*0
Difluoride		-291.0	-290.2	± 1.5	kJ/mol	37.9973550 ± 0.0000010	12184-85-9*0
2-Hydrotrioxy		299.6	293.9	± 1.2	kJ/mol	49.00614 ± 0.00090	12500-78-60
Ethenol		-108.73	-119.44	± 0.60	kJ/mol	44.0526 ± 0.0017	557-75-5*2
Vinoxy		22.97	16.13	± 0.68	kJ/mol	43.0446 ± 0.0016	6912-06-7*0
Oxoethanide		-44.0	-49.5	± 1.3	kJ/mol	43.0452 ± 0.0016	78944-68-0*0
Oxirene		273.18	271.02	± 0.92	kJ/mol	42.0367 ± 0.0016	157-18-6*2
Hydroxyformyl		-174.31	-177.34	± 0.50	kJ/mol	45.0174 ± 0.0010	2564-86-5*2
Hydroxyformyl anion		-319.53	-322.11	± 0.57	kJ/mol	45.0180 ± 0.0010	78944-70-4*2
Ethoxyethane		-222.99	-250.41	± 0.82	kJ/mol	74.1216 ± 0.0033	60-29-7*0
Acetone enol		-152.0	-169.4	± 1.1	kJ/mol	58.0791 ± 0.0025	29456-04-0*1
Acetate		-496.4	-505.5	± 1.2	kJ/mol	59.0446 ± 0.0017	71-50-1*0
(Dimethylamino)methyl		165.8	142.8	± 1.3	kJ/mol	58.1024 ± 0.0025	30208-47-0*0
Chloromethide		56.4	53.2	± 2.0	kJ/mol	49.4798 ± 0.0012	60291-29-4*0
Hexachloroethane		-147.0	-149.4	± 1.3	kJ/mol	236.7376 ± 0.0056	67-72-1*0
cis-1,2-Dichloroethene	$C(\Cl)=C\Cl$	3.47	-2.53	± 0.54	kJ/mol	96.9427 ± 0.0024	156-59-2*0
Bromanylium		1257.778	1251.715	± 0.057	kJ/mol	79.90345 ± 0.00100	22541-56-6*0
Dichloroacetylene		230.13	233.44	± 0.94	kJ/mol	94.9268 ± 0.0024	7572-29-4*0
Difluoromethylene		-193.89	-193.42	± 0.36	kJ/mol	50.00751 ± 0.00080	2154-59-8*0
Hexafluoroethane		-1334.14	-1342.44	± 0.97	kJ/mol	138.0118 ± 0.0016	76-16-4*0
1,1-Difluoroethane		-489.02	-502.74	± 0.55	kJ/mol	66.0500 ± 0.0016	75-37-6*0
2-Fluoroethanol		-405.86	-423.10	± 0.99	kJ/mol	64.0589 ± 0.0017	371-62-0*0
Fluoronium		774.10	771.16	± 0.88	kJ/mol	21.01373 ± 0.00014	12206-67-6*2
Benzylide		141.92	123.01	± 0.42	kJ/mol	91.1310 ± 0.0056	18860-15-6*0
Ethylbenzene		58.20	29.73	± 0.55	kJ/mol	106.1650 ± 0.0064	100-41-4*0
Phenylethene		169.68	148.34	± 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
Nitrogen atom cation		1872.907	1875.689	± 0.024	kJ/mol	14.006191 ± 0.000070	14158-23-7*0
Acetonate		-187.81	-201.36	± 0.98	kJ/mol	57.0717 ± 0.0024	24262-31-5*0
Methyl nitrite		-55.52	-66.19	± 0.45	kJ/mol	61.0401 ± 0.0010	624-91-9*0
Propadienone		131.92	130.29	± 0.79	kJ/mol	54.0474 ± 0.0024	61244-93-7*0
1-Cyanoethylidene		475.6	470.5	± 1.1	kJ/mol	53.0627 ± 0.0024	498544-34-6*2
3-Imino-2-propen-1-ylidene		530.6	525.8	± 1.2	kJ/mol	53.0627 ± 0.0024	916765-05-4*11
2-(Methylidyneamino)ethenyl		600.6	595.6	± 1.2	kJ/mol	53.0627 ± 0.0024	123416-74-0*11
1-Cyanovinyl anion		224.3	221.5	± 1.3	kJ/mol	52.0553 ± 0.0024	36259-97-9*0
2-Cyanovinyl		448.0	445.5	± 1.1	kJ/mol	52.0547 ± 0.0024	189141-20-6*1
3-Buten-1-ynyl		628.4	626.2	± 1.1	kJ/mol	51.0666 ± 0.0032	108179-98-2*0
Water dimer		-491.077	-499.117	± 0.051	kJ/mol	36.03056 ± 0.00066	25655-83-8*0
Methylsilane		-9.46	-25.63	± 0.96	kJ/mol	46.14384 ± 0.00095	992-94-9*0
Trimethylsiloxy		-187.4	-210.4	± 2.0	kJ/mol	89.1885 ± 0.0025	54572-10-0*0
1,5-Hexadiyne		431.5	421.0	± 1.2	kJ/mol	78.1118 ± 0.0048	628-16-0*0
N-Methylethanamine		-17.8	-45.9	± 1.1	kJ/mol	59.1103 ± 0.0025	624-78-2*0
Naphthalene		170.97	147.49	± 0.59	kJ/mol	128.1705 ± 0.0080	91-20-3*0
Trioxygen difluoride		112.3	106.5	± 1.1	kJ/mol	85.99501 ± 0.00090	16829-28-0*1
Carbon cation		1797.851	1803.449	± 0.045	kJ/mol	12.01015 ± 0.00080	14067-05-1*0
Methyliumylidene		1619.755	1623.099	± 0.052	kJ/mol	13.01809 ± 0.00080	24361-82-8*0
Ethylidyne		508.53	504.83	± 0.80	kJ/mol	27.0452 ± 0.0016	67624-57-1*1
Vinylidene anion		363.99	363.80	± 0.50	kJ/mol	26.0378 ± 0.0016	66295-36-1*0
Ozonide		-58.48	-60.84	± 0.21	kJ/mol	47.99875 ± 0.00090	12596-80-4*0
Bromochlorane		21.882	14.439	± 0.060	kJ/mol	115.3567 ± 0.0013	13863-41-7*0
Oxidanylium		1293.192	1293.221	± 0.035	kJ/mol	17.00679 ± 0.00031	12259-29-9*0
Cyanomethanide		114.24	111.41	± 0.68	kJ/mol	40.0446 ± 0.0016	21438-99-3*0
Dioxaziridinyl		355.1	352.6	± 1.4	kJ/mol	46.00554 ± 0.00060	66252-29-7*0
Methanol cation		856.82	846.50	± 0.32	kJ/mol	32.04131 ± 0.00090	12538-91-9*0
Methyloxonium		588.5	574.3	± 1.2	kJ/mol	33.04925 ± 0.00092	17836-08-7*0
Hydroxymethylene		219.3	216.4	± 1.1	kJ/mol	30.02598 ± 0.00087	19710-56-6*3
Aquacarbon		442.7	441.1	± 1.3	kJ/mol	30.02598 ± 0.00087	81434-73-3*1
Carbonic acid		-596.87	-606.98	± 0.83	kJ/mol	62.0248 ± 0.0012	463-79-6*2
Carbonic acid		-561.64	-570.49	± 0.97	kJ/mol	62.0248 ± 0.0012	463-79-6*3
Hydrogen carbonate		-720.5	-726.9	± 1.4	kJ/mol	61.0174 ± 0.0012	71-52-3*0
n-Propylium		856.96	838.68	± 0.85	kJ/mol	43.0871 ± 0.0024	19252-52-9*0
Propylidene		349.45	335.76	± 0.96	kJ/mol	42.0797 ± 0.0024	6700-78-3*1
Allyl anion		134.08	123.07	± 0.23	kJ/mol	41.0723 ± 0.0024	1724-46-5*0
Cyclopropyl		303.4	290.8	± 1.3	kJ/mol	41.0718 ± 0.0024	2417-82-5*0
Propylidyne		624.6	613.0	± 1.3	kJ/mol	41.0718 ± 0.0024	85056-54-8*2
Cycloprop-2-enylium		1080.3	1075.2	± 1.0	kJ/mol	39.0554 ± 0.0024	26810-74-2*0
1-Propynylide		264.35	260.77	± 0.70	kJ/mol	39.0565 ± 0.0024	36147-87-2*0
1-Propen-1-yl-3-ylidene		656.6	653.2	± 1.1	kJ/mol	39.0559 ± 0.0024	84654-90-0*11
sec-Butyl		90.99	66.22	± 0.87	kJ/mol	57.1143 ± 0.0033	2348-55-2*0
t-Butyl anion		76.7	51.9	± 1.3	kJ/mol	57.1148 ± 0.0033	65114-21-8*0
Hypochloroperoxoous acid, hydroxy ester		49.2	42.2	± 1.9	kJ/mol	84.4588 ± 0.0013	928652-99-7*1
Trioxidanyl		25.32	23.34	± 0.13	kJ/mol	49.00614 ± 0.00090	12500-78-6*1
Oxirene		387.8	383.6	± 1.4	kJ/mol	42.0367 ± 0.0016	157-18-6*11
Oxiranylidene		213.5	209.2	± 1.4	kJ/mol	42.0367 ± 0.0016	50983-85-2*2
Dioxirane		9.43	1.76	± 0.55	kJ/mol	46.0254 ± 0.0010	157-26-6*0
Hydroxyformyl anion		-313.64	-315.44	± 0.58	kJ/mol	45.0180 ± 0.0010	78944-70-4*1
Ethoxyethene		-117.7	-141.5	± 1.5	kJ/mol	72.1057 ± 0.0033	109-92-2*2
Oxygen atom		436.666	438.523	± 0.0021	kJ/mol	15.99940 ± 0.00030	17778-80-2*2
Ethyl formate		-375.3	-394.0	± 1.2	kJ/mol	74.0785 ± 0.0025	109-94-4*1
Methoxyoxomethyl		-152.6	-160.7	± 1.5	kJ/mol	59.0440 ± 0.0017	16481-04-2*1
Hydroxyde			-230.010	± 0.028	kJ/mol	17.00789 ± 0.00031	14280-30-9*800
(Formyloxy)methyl		-151.8	-160.0	± 1.3	kJ/mol	59.0440 ± 0.0017	3122-12-1*1
Ethylene glycol		-369.74	-389.37	± 0.40	kJ/mol	62.0678 ± 0.0018	107-21-1*0
Dioxoethyl		-63.6	-65.0	± 1.3	kJ/mol	57.0281 ± 0.0017	702699-38-5*0
Oxalic acid		-721.0	-731.6	± 1.2	kJ/mol	90.0349 ± 0.0020	144-62-7*0
(Methylamino)methyl cation		729.27	710.65	± 0.97	kJ/mol	44.0752 ± 0.0017	31277-24-40
Diazomethyl		468.17	465.62	± 0.98	kJ/mol	41.03212 ± 0.00082	20813-32-5*0
Isocyanoamidogen		490.3	488.3	± 1.5	kJ/mol	41.03212 ± 0.00082	947408-73-3*0
Iodine monobromide		49.719	40.772	± 0.067	kJ/mol	206.8085 ± 0.0010	7789-33-5*0
Dichloromethyl		92.20	90.28	± 0.88	kJ/mol	83.9240 ± 0.0020	3474-12-2*0
Chloromethyl		118.46	115.39	± 0.87	kJ/mol	49.4793 ± 0.0012	6806-86-6*0
Methyl hypochlorite		-53.0	-63.0	± 1.4	kJ/mol	66.4866 ± 0.0013	593-78-2*0
1,2-Dichloroethane		-118.59	-130.54	± 0.54	kJ/mol	98.9586 ± 0.0024	107-06-2*0
Chlorofluoromethane		-256.1	-263.3	± 1.1	kJ/mol	68.4777 ± 0.0012	593-70-4*0
Difluoromethyliumyl		908.20	908.63	± 0.77	kJ/mol	50.00696 ± 0.00080	54250-40-7*0
Fluoromethyliumylidene		1122.93	1126.15	± 0.45	kJ/mol	31.00855 ± 0.00080	33412-11-2*0
1,2-Difluoroacetylene		2.86	5.69	± 0.64	kJ/mol	62.0182 ± 0.0016	689-99-6*0
Formyl chloride		-179.99	-183.20	± 0.77	kJ/mol	64.4707 ± 0.0012	2565-30-2*0
Chloroformyl		-21.92	-20.53	± 0.49	kJ/mol	63.4628 ± 0.0012	2602-42-8*0
o-Benzyne anion		413.73	404.62	± 0.96	kJ/mol	76.0965 ± 0.0048	100569-88-8*0
Cycloheptene		28.21	-9.02	± 0.75	kJ/mol	96.1702 ± 0.0057	628-92-2*0
Cycloheptatriene		207.19	183.77	± 0.95	kJ/mol	92.1384 ± 0.0056	544-25-2*0
Fluorobenzene cation		788.89	773.87	± 0.89	kJ/mol	96.1018 ± 0.0048	34468-25-2*0
Nitrosobenzene		215.9	199.0	± 1.2	kJ/mol	107.1100 ± 0.0048	586-96-9*0
Nitromethyl		139.0	129.5	± 1.2	kJ/mol	60.0321 ± 0.0010	16787-85-2*0
Nitroxyl		79.41	74.15	± 0.19	kJ/mol	62.00494 ± 0.00090	12033-49-7*0
2-Butanone		-217.00	-238.46	± 0.79	kJ/mol	72.1057 ± 0.0033	78-93-3*0
Methylketene		-54.7	-64.2	± 1.1	kJ/mol	56.0633 ± 0.0024	6004-44-0*0
Acrolein		-55.3	-65.7	± 1.2	kJ/mol	56.0633 ± 0.0024	107-02-8*1
Formaldoxime		30.5	19.9	± 1.3	kJ/mol	45.04066 ± 0.00088	75-17-2*1
Dioxygen anion		-43.36	-42.72	± 0.17	kJ/mol	31.99935 ± 0.00060	11062-77-4*0
1,3-Cyclobutadien-1-yl		653.7	649.2	± 1.1	kJ/mol	51.0666 ± 0.0032	127611-22-7*0
Azanylium		944.272	937.317	± 0.029	kJ/mol	17.03001 ± 0.00022	19496-55-0*0
Silylene		272.5	270.8	± 1.2	kJ/mol	30.10138 ± 0.00033	13825-90-6*2
Trimethylsiloxide		-485.9	-509.8	± 2.1	kJ/mol	89.1890 ± 0.0025	41866-81-3*0
1,3-Pentadiyne		417.96	413.74	± 0.84	kJ/mol	64.0853 ± 0.0040	4911-55-1*0
1,4-Hexadiyne		424.6	414.6	± 1.3	kJ/mol	78.1118 ± 0.0048	10420-91-4*0
Biallenyl		410.5	398.8	± 1.5	kJ/mol	78.1118 ± 0.0048	29776-96-3*1
1,2,3,4-Hexatetraene		429.7	420.0	± 1.6	kJ/mol	78.1118 ± 0.0048	177856-38-1*0
(E)-1-Methylallyl		154.61	137.30	± 0.79	kJ/mol	55.0984 ± 0.0032	17787-86-9*0
Nitrosamine		85.00	76.12	± 0.96	kJ/mol	46.02876 ± 0.00036	35576-91-1*0
Butadiynyl		801.8	808.4	± 1.0	kJ/mol	49.0507 ± 0.0032	53561-65-2*0
Peroxynitric acid		-42.6	-52.9	± 1.3	kJ/mol	79.0123 ± 0.0012	26404-66-0*0
Nitrosyl chloride		54.466	52.564	± 0.068	kJ/mol	65.45884 ± 0.00095	2696-92-6*0
Hydrogen difluoride		-198.5	-198.4	± 1.2	kJ/mol	39.004746 ± 0.000070	12528-21-1*1
Carbon dioxide		49.8	50.6	± 1.1	kJ/mol	44.00950 ± 0.00100	124-38-9*1
Bicyclo[1.1.0]buta-1,3-diene-2,4-diyl		1047.19	1054.78	± 0.69	kJ/mol	48.0428 ± 0.0032	12184-80-4*0
Methane cation		1150.673	1144.290	± 0.062	kJ/mol	16.04191 ± 0.00085	20741-88-2*0
Oxygen atom		246.844	249.229	± 0.0021	kJ/mol	15.99940 ± 0.00030	17778-80-2*1
Oxoniumyl ion		978.470	975.567	± 0.028	kJ/mol	18.01473 ± 0.00033	56583-62-1*0
Ethanium		874.32	858.08	± 0.62	kJ/mol	31.0764 ± 0.0017	24669-33-8*0
Acetylene cation		1328.85	1328.18	± 0.13	kJ/mol	26.0367 ± 0.0016	25641-79-6*0
1-Ethylium-1-ylidene		1329.6	1328.2	± 1.2	kJ/mol	27.0447 ± 0.0016	78949-84-5*0
Ethylidyne anion		457.0	452.9	± 1.2	kJ/mol	27.0458 ± 0.0016	117768-70-4*0
Chloryl hydride		197.7	191.2	± 1.6	kJ/mol	68.4594 ± 0.0011	174365-32-3*0
Bifluoride		-481.8	-480.6	± 1.9	kJ/mol	39.005295 ± 0.000070	18130-74-02
Isocyanomethyl		363.8	361.3	± 1.2	kJ/mol	40.0440 ± 0.0016	70971-59-4*0
Methyloxoniumylidene		1062.71	1054.89	± 0.75	kJ/mol	31.03337 ± 0.00088	58157-09-8*0
Hydroxymethylene		131.10	127.36	± 0.29	kJ/mol	30.02598 ± 0.00087	19710-56-6*2
1H-Triazirin-1-yl		585.9	584.2	± 2.0	kJ/mol	42.02022 ± 0.00021	912535-95-6*0
Hydroxymethylene cation		971.9	968.2	± 1.4	kJ/mol	30.02543 ± 0.00087	135395-06-1*1
Chlorine difluoride		-47.0	-48.2	± 1.4	kJ/mol	73.44951 ± 0.00090	24801-48-7*0
Isoformyl		217.26	217.64	± 0.69	kJ/mol	29.01804 ± 0.00086	71080-92-7*0
Trioxidanylium		1070.4	1064.1	± 1.4	kJ/mol	49.00559 ± 0.00090	74241-49-9*1
1-Methylethylidene		326.8	313.6	± 1.2	kJ/mol	42.0797 ± 0.0024	40852-89-9*1
Allylium		964.58	953.02	± 0.42	kJ/mol	41.0713 ± 0.0024	1724-44-3*0
1-Propenyl		280.36	269.53	± 0.81	kJ/mol	41.0718 ± 0.0024	6067-68-1*1
Cyclopropynyl		710.97	715.09	± 0.85	kJ/mol	37.0400 ± 0.0024	119178-99-3*0
Hydrogen fluoride			-321.10	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*820
n-Butyl anion		105.9	81.0	± 1.3	kJ/mol	57.1148 ± 0.0033	79431-01-9*0
sec-Butyl anion		103.1	78.6	± 1.3	kJ/mol	57.1148 ± 0.0033	79431-00-8*0
1-Hydroxyethylium		610.9	596.4	± 1.1	kJ/mol	45.0600 ± 0.0017	18682-96-7*2
Iodine cation		1115.549	1115.149	± 0.0062	kJ/mol	126.903921 ± 0.000030	22541-93-1*0
Methoxymethyl		12.7	0.2	± 1.4	kJ/mol	45.0605 ± 0.0017	16520-04-0*0
Vinyl alcohol cation		778.7	767.4	± 1.3	kJ/mol	44.0520 ± 0.0017	57239-63-1*2
Oxiranyl		172.5	164.2	± 1.3	kJ/mol	43.0446 ± 0.0016	31586-84-2*0
Oxiranylium		901.2	893.2	± 1.5	kJ/mol	43.0441 ± 0.0016	57789-76-1*2
Water anion		31.3	29.8	± 3.1	kJ/mol	18.01583 ± 0.00033	12259-30-2*100
C=O=C		653.0	657.3	± 1.5	kJ/mol	40.0208 ± 0.0016	12071-23-71
C=O=C		721.9	726.2	± 1.6	kJ/mol	40.0208 ± 0.0016	12071-23-72
Oxoethylidene		275.4	272.6	± 1.7	kJ/mol	42.0367 ± 0.0016	39920-84-8*2
Ethyl hydroperoxide		-143.0	-161.4	± 1.2	kJ/mol	62.0678 ± 0.0018	3031-74-1*0
Formic acid cation		721.89	714.81	± 0.26	kJ/mol	46.0248 ± 0.0010	50614-05-6*1
Dioxidenium		1110.87	1107.98	± 0.11	kJ/mol	33.00619 ± 0.00060	12207-52-2*0
Formyloxidanyl		-122.09	-125.44	± 0.56	kJ/mol	45.0174 ± 0.0010	16499-21-1*2
Diazenyl		252.14	249.22	± 0.45	kJ/mol	29.02142 ± 0.00016	36882-13-0*0
(Formyloxy)methyl		-136.2	-144.4	± 1.3	kJ/mol	59.0440 ± 0.0017	3122-12-1*2
Carboxymethyl		-206.6	-215.9	± 1.2	kJ/mol	59.0440 ± 0.0017	2887-46-9*2
Dimethylamide		122.4	104.0	± 1.7	kJ/mol	44.0763 ± 0.0017	34285-60-4*0
Hydrogen chloride			-165.757	± 0.025	kJ/mol	36.46064 ± 0.00090	7647-01-0*828
1,1,2-Trichloroethane		-136.6	-148.3	± 1.4	kJ/mol	133.4033 ± 0.0031	79-00-5*0
1,1,1,2-Tetrachloroethane		-144.5	-153.1	± 1.3	kJ/mol	167.8481 ± 0.0039	630-20-6*0
Pentachloroethyl		27.0	25.1	± 1.3	kJ/mol	201.2849 ± 0.0048	7094-17-9*0
Iodomethane			-12.17	± 0.19	kJ/mol	141.93899 ± 0.00083	74-88-4*590
Difluoromethylene		43.30	44.01	± 0.36	kJ/mol	50.00751 ± 0.00080	2154-59-8*1
Bromide			-120.59	± 0.15	kJ/mol	79.90455 ± 0.00100	24959-67-9*800
Ethyl iodide		-9.41	-39.28	± 0.49	kJ/mol	155.9656 ± 0.0016	75-03-6*500
cis-1,2-Difluoroethene	$F/C=C\F$	-302.90	-309.66	± 0.90	kJ/mol	64.0341 ± 0.0016	1630-77-9*0
Fluoroethynyl		445.3	449.8	± 1.6	kJ/mol	43.0198 ± 0.0016	22533-50-2*0
Fluoro(fluorooxy)methylene		-134.8	-136.0	± 1.3	kJ/mol	66.00691 ± 0.00085	479587-30-9*2
Dibromophosgene		-97.95	-113.89	± 0.37	kJ/mol	187.8181 ± 0.0022	593-95-3*0
Benzene		50.72	49.18	± 0.22	kJ/mol	78.1118 ± 0.0048	71-43-2*500
o-Benzyne		468.12	459.20	± 0.87	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		587.0	577.5	± 1.2	kJ/mol	76.0960 ± 0.0048	3355-34-8*2
Cycloheptane		-72.73	-118.22	± 0.53	kJ/mol	98.1861 ± 0.0057	291-64-5*0
Benzoyl fluoride		-288.0	-304.4	± 1.5	kJ/mol	124.1124 ± 0.0056	455-32-3*0
Fluoride			-334.50	± 0.16	kJ/mol	18.99895178 ± 0.00000050	16984-48-8*800
Hydroxyimidogen		217.85	214.97	± 0.77	kJ/mol	31.01408 ± 0.00032	35337-59-8*0
Dinitrogen pentoxide		24.45	14.88	± 0.35	kJ/mol	108.0105 ± 0.0015	10102-03-1*0
2-Cyclopropen-1-one		163.7	159.8	± 1.2	kJ/mol	54.0474 ± 0.0024	2961-80-0*0
Iodide			-56.823	± 0.090	kJ/mol	126.905019 ± 0.000030	20461-54-5*800
Cyanovinylidene		581.7	584.2	± 1.2	kJ/mol	51.0468 ± 0.0024	70277-81-5*0
Isocyanovinylidene		697.0	700.3	± 1.4	kJ/mol	51.0468 ± 0.0024	737788-76-0*0
Cyanoacetylide		300.3	305.6	± 1.2	kJ/mol	50.0394 ± 0.0024	12373-53-4*0
Isocyanoethene		285.14	278.64	± 0.94	kJ/mol	53.0627 ± 0.0024	14668-82-7*1
1-Cyanoethylidene		437.5	433.7	± 1.5	kJ/mol	53.0627 ± 0.0024	498544-34-6*1
Isocyanomethylene		582.3	583.6	± 1.7	kJ/mol	39.0361 ± 0.0016	78694-65-2*1
2-Methyl-2-cyclopropen-1-ylidene		447.9	441.7	± 1.2	kJ/mol	52.0746 ± 0.0032	185841-59-2*2
1,2,3-Butatrien-1-ylium		1425.7	1426.0	± 1.3	kJ/mol	51.0661 ± 0.0032	81932-79-8*1
1,2,3-Butatrien-1-yl anion		388.5	386.6	± 1.3	kJ/mol	51.0672 ± 0.0032	102275-54-7*0
But-1-en-3-yn-1-ide		419.7	418.5	± 1.3	kJ/mol	51.0672 ± 0.0032	119611-65-3*2
Azide		193.56	190.05	± 0.91	kJ/mol	42.02077 ± 0.00021	14343-69-2*0
Propargyl chloride		186.5	180.6	± 1.3	kJ/mol	74.5086 ± 0.0026	624-65-7*0
Dioxosilane		-277.8	-279.1	± 2.0	kJ/mol	60.08430 ± 0.00067	7631-86-9*0
Silylene		362.3	360.7	± 1.2	kJ/mol	30.10138 ± 0.00033	13825-90-6*1
Benzvalene		404.3	386.5	± 1.2	kJ/mol	78.1118 ± 0.0048	659-85-8*0
Methylidyne		592.825	596.159	± 0.097	kJ/mol	13.01864 ± 0.00080	3315-37-5*1
Hydrogen difluoride cation		1174.3	1171.3	± 1.5	kJ/mol	39.004198 ± 0.000070	126950-54-70
Methylammonium		628.5	609.6	± 1.4	kJ/mol	32.06453 ± 0.00091	17000-00-9*0
Aminomethylene		245.9	238.2	± 1.5	kJ/mol	29.04126 ± 0.00083	35430-17-2*0
Methylimidogen		323.1	315.3	± 1.1	kJ/mol	29.04126 ± 0.00083	27770-42-9*0
Methyleneamidogen anion		192.77	189.01	± 0.91	kJ/mol	28.03387 ± 0.00082	28892-56-0*0
(Z)-Iminomethyl		294.50	291.01	± 0.90	kJ/mol	28.03332 ± 0.00082	54980-11-9*0
Aminomethylidyne		371.9	368.4	± 1.1	kJ/mol	28.03332 ± 0.00082	84654-89-7*0
Bifluoride		-68.0	-67.6	± 1.6	kJ/mol	39.005295 ± 0.000070	18130-74-01
Methyleneoxonium		152.46	144.14	± 0.49	kJ/mol	32.04186 ± 0.00090	177788-17-9*0
Peroxynitrous acid		-0.18	-7.23	± 0.53	kJ/mol	63.01288 ± 0.00091	14691-52-2*2
Hydroxymethylene anion		147.1	144.1	± 1.6	kJ/mol	30.02653 ± 0.00087	207914-87-2*1
Hydroxymethyliumylidene		986.02	987.66	± 0.83	kJ/mol	29.01749 ± 0.00086	60528-75-8*0
Isoformyl anion		55.7	58.4	± 1.8	kJ/mol	29.01859 ± 0.00086	81747-63-9*1
Peroxyformic acid		-265.3	-273.2	± 1.6	kJ/mol	62.0248 ± 0.0012	107-32-4*2
Hydroxyoxomethoxy		-358.8	-364.9	± 1.5	kJ/mol	61.0168 ± 0.0012	38330-85-7*0
Hydroperoxycarbonyl		-72.9	-76.7	± 1.7	kJ/mol	61.0168 ± 0.0012	153751-35-0*0
Chlorine difluoride cation		998.9	996.7	± 1.7	kJ/mol	73.44896 ± 0.00090	32629-46-2*0
Propan-1-yl-3-ylidene		554.3	545.6	± 1.3	kJ/mol	41.0718 ± 0.0024	50457-59-52
1-Propenylidene		392.3	387.9	± 1.1	kJ/mol	40.0639 ± 0.0024	70277-78-0*1
Oxofluoronium		1342.65	1342.60	± 0.81	kJ/mol	34.99725 ± 0.00030	12763-67-6*0
1-Propynyl		528.30	526.12	± 0.70	kJ/mol	39.0559 ± 0.0024	89342-91-6*0
Cycloprop-2-enyl		490.19	485.64	± 0.58	kJ/mol	39.0559 ± 0.0024	28933-84-8*0
2-Propen-1-yl-3-ylidene		556.55	554.28	± 0.89	kJ/mol	39.0559 ± 0.0024	202744-74-9*0
(E)-Diazene cation		1132.49	1125.55	± 0.64	kJ/mol	30.02881 ± 0.00020	59952-06-6*0
Cyclopropenylidene		497.03	496.06	± 0.46	kJ/mol	38.0480 ± 0.0024	16165-40-5*0
2-Propynylidyne anion		540.03	544.80	± 0.83	kJ/mol	37.0406 ± 0.0024	82893-67-2*0
t-Butylium		733.82	710.54	± 0.98	kJ/mol	57.1137 ± 0.0033	14804-25-2*0
(Z)-Diazene	$[H]/N=N\[H]$	228.83	221.69	± 0.63	kJ/mol	30.02936 ± 0.00020	15626-42-3*0
iso-Butyl		96.97	72.98	± 0.92	kJ/mol	57.1143 ± 0.0033	4630-45-9*0
Deuterium atom		219.804	221.717	± 0.000	kJ/mol	2.01410177800 ± 0.00000000040	16873-17-9*0
Methylcyclopropane		47.8	24.5	± 1.3	kJ/mol	56.1063 ± 0.0032	594-11-6*0
n-Nonane		-176.46	-228.25	± 0.51	kJ/mol	128.2551 ± 0.0073	111-84-2*0
Ethanol		-269.74	-277.51	± 0.22	kJ/mol	46.0684 ± 0.0017	64-17-5*500
Peroxychlorous acid		96.2	90.2	± 2.1	kJ/mol	84.4588 ± 0.0013	177778-92-6*1
Dioxyamidogen		240.4	233.8	± 1.8	kJ/mol	47.01348 ± 0.00061	71843-95-3*2
Trioxidaniumyl		925.5	916.2	± 1.5	kJ/mol	50.01353 ± 0.00091	161321-37-5*2
2-Hydroxyethyl		-5.5	-18.0	± 1.3	kJ/mol	45.0605 ± 0.0017	4422-54-2*3
Ethoxy		1.15	-12.28	± 0.45	kJ/mol	45.0605 ± 0.0017	2154-50-9*0
Oxygen cation monohydrate		1153.3	1147.8	± 3.3	kJ/mol	34.01413 ± 0.00062	31748-17-10
Vinyl alcohol cation		786.76	775.53	± 0.85	kJ/mol	44.0520 ± 0.0017	57239-63-1*1
Vinoxy cation		1020.2	1013.1	± 1.5	kJ/mol	43.0441 ± 0.0016	35731-40-91
Vinoxide		-153.03	-160.09	± 0.68	kJ/mol	43.0452 ± 0.0016	35731-40-9*0
2-Hydroxyethenyl		138.01	131.26	± 0.92	kJ/mol	43.0446 ± 0.0016	108665-16-3*21
Oxiranyl anion		121.2	113.2	± 1.5	kJ/mol	43.0452 ± 0.0016	72722-59-9*2
Acetic acid			-485.16	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*800
Ketene		-45.35	-48.47	± 0.11	kJ/mol	42.0367 ± 0.0016	463-51-4*2
COC vdW		589.7	598.5	± 1.5	kJ/mol	40.0208 ± 0.0016	12071-24-81
Oxirene		389.9	385.7	± 1.4	kJ/mol	42.0367 ± 0.0016	157-18-6*12
Dioxiranylidene		190.3	191.1	± 1.4	kJ/mol	44.00950 ± 0.00100	138832-57-2*0
Xenon cation		1170.354	1170.354	± 0.0062	kJ/mol	131.2895 ± 0.0200	24203-25-6*0
Formyloxoniumylidene		1017.3	1013.9	± 1.4	kJ/mol	45.0169 ± 0.0010	54375-27-8*0
Dioxymethylene		364.0	361.7	± 2.4	kJ/mol	45.0174 ± 0.0010	438586-67-5*1
2-Propanol		-249.37	-273.46	± 0.36	kJ/mol	60.0950 ± 0.0025	67-63-0*0
Perchloric acid		13.2	1.8	± 1.8	kJ/mol	100.4582 ± 0.0015	7601-90-3*0
Cyanate		-221.19	-221.41	± 0.53	kJ/mol	42.01739 ± 0.00086	661-20-1*0
Oxazirinyl		450.1	450.9	± 1.5	kJ/mol	42.01684 ± 0.00086	228850-18-8*0
Hydrogen fluoride			-321.14	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*821
Propionic acid		-436.35	-454.25	± 0.60	kJ/mol	74.0785 ± 0.0025	79-09-4*1
2-Methoxy-2-oxoethyl		-203.4	-218.6	± 1.6	kJ/mol	73.0706 ± 0.0025	54668-31-4*1
(Acetyloxy)methyl		-200.6	-214.3	± 1.6	kJ/mol	73.0706 ± 0.0025	2887-49-2*1
Chlorine fluoride cation		1165.52	1165.71	± 0.49	kJ/mol	54.45055 ± 0.00090	12432-44-9*0
Dimethylmethyleneammonium		696.8	671.7	± 1.3	kJ/mol	58.1018 ± 0.0025	28149-27-1*0
Trichloromethide		-124.8	-124.3	± 2.0	kJ/mol	118.3693 ± 0.0028	14478-07-0*0
2-Hydrotrioxy cation		1298.2	1291.5	± 1.5	kJ/mol	49.00559 ± 0.00090	74241-49-90
Hydroxyaminiumyl		1161.1	1158.2	± 1.4	kJ/mol	31.01353 ± 0.00032	63559-88-6*0
1,1,2,2-Tetrachloroethane		-146.8	-156.2	± 1.5	kJ/mol	167.8481 ± 0.0039	79-34-5*0
1,1,2,2-Tetrachloroethane		-173.0	-202.0	± 1.5	kJ/mol	167.8481 ± 0.0039	79-34-5*500
Pentachloroethane			-202.9	± 2.5	kJ/mol	202.2928 ± 0.0048	76-01-7*500
Trichloroethene			-49.2	± 1.5	kJ/mol	131.3874 ± 0.0031	79-01-6*590
Tetrachloroethene			-62.9	± 1.1	kJ/mol	165.8322 ± 0.0039	127-18-4*500
Oxygen anion monohydrate		-239.0	-244.3	± 3.0	kJ/mol	34.01523 ± 0.00062	31748-17-1*0
Nitrosodioxaziridine		413.7	407.6	± 1.8	kJ/mol	76.01168 ± 0.00091	132871-99-9*1
Trichloroethene		-11.3	-14.6	± 1.5	kJ/mol	131.3874 ± 0.0031	79-01-6*0
Bromodichloromethane		-37.4	-49.1	± 1.2	kJ/mol	163.8280 ± 0.0022	75-27-4*0
Difluorodibromomethane		-364.0	-382.0	± 1.3	kJ/mol	209.8155 ± 0.0022	75-61-6*0
Dichlorodibromomethane		21.0	5.1	± 1.3	kJ/mol	242.7241 ± 0.0028	594-18-3*0
Difluorobromomethane		-411.15	-424.34	± 0.46	kJ/mol	130.9194 ± 0.0013	1511-62-2*0
2-Hydrotrioxy anion		27.5	21.8	± 1.4	kJ/mol	49.00669 ± 0.00090	89965-38-80
1,2-Difluoroethane		-434.42	-447.84	± 0.81	kJ/mol	66.0500 ± 0.0016	624-72-6*0
Fluoro(fluorooxy)methylene		-37.5	-39.1	± 1.4	kJ/mol	66.00691 ± 0.00085	479587-30-9*1
Dinitrogen tetraoxide		20.18	10.89	± 0.14	kJ/mol	92.0111 ± 0.0012	10544-72-6*0
Chlorine chlorite		168.6	166.2	± 1.3	kJ/mol	102.9042 ± 0.0019	105206-44-8*3
Phenylium		1250.8	1237.7	± 1.6	kJ/mol	77.1034 ± 0.0048	17333-73-2*1
Hydroxyamidogen		123.4	116.8	± 1.7	kJ/mol	32.02202 ± 0.00034	13940-32-4*2
Hydroxyaminylium		1019.5	1012.4	± 2.5	kJ/mol	32.02147 ± 0.00034	66097-71-0*1
Chlorobenzene cation		942.48	928.56	± 0.61	kJ/mol	112.5561 ± 0.0049	55450-32-3*0
Chlorobenzene			11.24	± 0.59	kJ/mol	112.5566 ± 0.0049	108-90-7*500
m-Chlorophenyl		320.1	309.4	± 1.6	kJ/mol	111.5487 ± 0.0049	3474-40-6*0
p-Chlorophenyl		323.0	312.2	± 1.6	kJ/mol	111.5487 ± 0.0049	2396-00-1*0
o-Chlorophenyl		327.4	316.6	± 1.6	kJ/mol	111.5487 ± 0.0049	3474-42-8*0
Bromobenzene cation		994.8	973.3	± 1.3	kJ/mol	157.0074 ± 0.0049	55450-33-4*0
Iodobenzene		112.9	113.0	± 1.1	kJ/mol	204.0084 ± 0.0048	591-50-4*500
Nitrobenzene		81.6	61.6	± 1.4	kJ/mol	123.1094 ± 0.0049	98-95-3*0
1,3-Butadien-2-ol		-53.8	-70.8	± 1.6	kJ/mol	70.0898 ± 0.0032	59120-04-6*11
Formaldonitrone		78.4	67.1	± 1.4	kJ/mol	45.04066 ± 0.00088	67353-84-8*0
Oxywater		64.8	58.3	± 1.3	kJ/mol	34.01468 ± 0.00062	171363-09-0*0
2-Cyclopropen-1-imine		401.8	394.1	± 1.4	kJ/mol	53.0627 ± 0.0024	31589-17-0*0
1-Isocyanovinyl		519.1	517.3	± 1.4	kJ/mol	52.0547 ± 0.0024	321850-14-0*0
Chlorosyl hydride		141.9	139.0	± 1.7	kJ/mol	52.46004 ± 0.00095	71572-35-5*0
Aquachlorine cation		821.8	815.0	± 1.7	kJ/mol	53.46743 ± 0.00096	142599-65-3*0
Triiodide			-51.44	± 0.80	kJ/mol	380.713959 ± 0.000090	14900-04-0*800
Vinylvinylidene		494.1	488.7	± 1.8	kJ/mol	52.0746 ± 0.0032	148759-16-4*2
But-1-en-3-yn-1-ide		422.3	421.0	± 1.3	kJ/mol	51.0672 ± 0.0032	119611-65-3*1
Tetrahedryl anion		634.6	630.8	± 1.8	kJ/mol	51.0672 ± 0.0032	138805-00-2*0
Silicon carbide		740.5	745.5	± 2.4	kJ/mol	40.09620 ± 0.00085	409-21-2*0
Silicon carbide		-70.5	-71.5	± 1.5	kJ/mol	40.09620 ± 0.00085	409-21-2*501
Tetrafluorosilane		-1608.90	-1614.41	± 0.63	kJ/mol	104.07911 ± 0.00030	7783-61-1*0
Disilane		92.3	76.3	± 1.4	kJ/mol	62.21864 ± 0.00073	1590-87-0*0
Dimethylsilanone		-237.1	-252.5	± 2.3	kJ/mol	74.1539 ± 0.0017	47956-45-6*0
Dimethylsilane		-66.0	-87.5	± 1.2	kJ/mol	60.1704 ± 0.0017	1111-74-6*0
Fluorohydrochlorine cation		975.3	972.3	± 2.0	kJ/mol	55.45849 ± 0.00090	70110-64-4*0
Triprismane		575.9	556.5	± 1.3	kJ/mol	78.1118 ± 0.0048	650-42-0*0
Dihydrogen fluoride anion		133.2	131.9	± 1.6	kJ/mol	21.01483 ± 0.00014	117339-92-1*1
Propargylallene		431.2	419.6	± 1.4	kJ/mol	78.1118 ± 0.0048	33142-15-3*3
Phenanthrene		231.79	202.98	± 0.82	kJ/mol	178.2292 ± 0.0112	85-01-8*0
Diacetylide		460.9	465.9	± 1.0	kJ/mol	49.0513 ± 0.0032	59012-21-4*0
Chlorohydrofluorine cation		1000.8	998.1	± 2.1	kJ/mol	55.45849 ± 0.00090	70110-63-3*0
Cyanogen iodide anion		86.5	88.9	± 8.1	kJ/mol	152.92246 ± 0.00080	1356929-44-6*0
Ammonium nitrate		-350.29	-365.26	± 0.18	kJ/mol	80.04344 ± 0.00095	6484-52-2*500
Methanol		-235.27	-238.61	± 0.15	kJ/mol	32.04186 ± 0.00090	67-56-1*500
Formaldehyde cation		944.866	941.245	± 0.097	kJ/mol	30.02543 ± 0.00087	54288-05-0*0
Peroxychlorite		-34.3	-34.3	± 2.0	kJ/mol	83.4514 ± 0.0013	852472-63-0*0
Isoformyl anion		267.4	268.0	± 1.6	kJ/mol	29.01859 ± 0.00086	81747-63-9*2
Fluorochlorate		-256.03	-255.42	± 0.81	kJ/mol	54.45165 ± 0.00090	12272-56-9*0
Bromo hypobromite		120.5	104.0	± 1.2	kJ/mol	175.8074 ± 0.0020	21308-80-5*0
Trihydrogen dioxide anion		-487.5	-495.8	± 1.1	kJ/mol	35.02317 ± 0.00064	12501-19-8*0
Hydrogen fluoride			-321.06	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*902
Allene cation		1132.06	1124.91	± 0.24	kJ/mol	40.0633 ± 0.0024	65812-77-3*0
Peroxyimidogen		405.4	403.4	± 1.9	kJ/mol	46.00554 ± 0.00060	60488-31-50
Ethylene cation		1075.15	1067.94	± 0.12	kJ/mol	28.0526 ± 0.0016	34470-02-5*0
2-Propenylidene		417.4	409.8	± 1.5	kJ/mol	40.0639 ± 0.0024	19527-08-3*11
2-Propenylidene		452.56	445.43	± 0.91	kJ/mol	40.0639 ± 0.0024	19527-08-3*2
Cycloprop-1-enylide		373.5	369.1	± 1.8	kJ/mol	39.0565 ± 0.0024	80251-77-0*0
Trifluoromethide		-637.6	-639.4	± 1.8	kJ/mol	69.00646 ± 0.00080	54128-17-5*0
2-Cyclopropen-1-ylium-1-yl		1382.0	1380.9	± 1.1	kJ/mol	38.0474 ± 0.0024	85398-75-0*0
Propynylidene		597.6	599.4	± 1.3	kJ/mol	38.0480 ± 0.0024	67152-18-5*3
Propenediylidene		796.2	797.3	± 1.4	kJ/mol	38.0480 ± 0.0024	60731-11-5*0
n-Butylium		827.5	803.2	± 1.2	kJ/mol	57.1137 ± 0.0033	25453-90-1*0
Diiodide		-178.13	-180.72	± 0.48	kJ/mol	253.809489 ± 0.000060	12190-71-5*0
Oxadiazirene		351.7	349.9	± 1.7	kJ/mol	44.01288 ± 0.00033	227934-45-4*0
iso-Hexane		-134.63	-173.88	± 0.84	kJ/mol	86.1754 ± 0.0049	107-83-5*0
NON		545.5	542.6	± 1.7	kJ/mol	44.01288 ± 0.00033	227934-46-5*0
n-Decane		-192.42	-249.17	± 0.81	kJ/mol	142.2817 ± 0.0081	124-18-5*0
Ethyloxoniumyl		783.3	766.3	± 1.7	kJ/mol	46.0679 ± 0.0017	34480-55-2*0
1-Hydroxyethylium		608.75	594.32	± 0.39	kJ/mol	45.0600 ± 0.0017	18682-96-7*0
2-Hydroxyethylium		1019.1	1006.3	± 1.5	kJ/mol	45.0600 ± 0.0017	38607-31-7*3
Ethyloxoniumylidene		988.6	974.9	± 1.5	kJ/mol	45.0600 ± 0.0017	54387-07-4*0
Acetaldehyde cation		831.92	821.95	± 0.26	kJ/mol	44.0520 ± 0.0017	36505-03-0*0
Azidonitrene		692.1	687.5	± 1.4	kJ/mol	56.02696 ± 0.00028	147363-92-6*2
Oxiranylium		1233.5	1226.4	± 1.7	kJ/mol	43.0441 ± 0.0016	57789-76-1*1
Oxiranyl anion		140.9	134.9	± 1.6	kJ/mol	43.0452 ± 0.0016	72722-59-9*1
Iodine		107.157	106.757	± 0.0021	kJ/mol	126.904470 ± 0.000030	14362-44-8*1
Ketenyl anion		-48.47	-47.54	± 0.82	kJ/mol	41.0293 ± 0.0016	64066-01-9*0
Dicarbon monoxide anion		154.18	157.82	± 0.83	kJ/mol	40.0213 ± 0.0016	87191-88-6*0
Dicarbon monoxide		440.22	444.55	± 0.83	kJ/mol	40.0208 ± 0.0016	12071-23-7*2
COC vdW		726.3	734.6	± 1.7	kJ/mol	40.0208 ± 0.0016	12071-24-82
C=O-C cation		1585.8	1592.9	± 2.7	kJ/mol	40.0203 ± 0.0016	83483-98-1*1
C=O=C anion		550.3	554.1	± 1.7	kJ/mol	40.0213 ± 0.0016	87191-88-60
Oxirene cation		1106.3	1102.6	± 1.9	kJ/mol	42.0361 ± 0.0016	94664-69-4*0
Ethynol		400.0	397.6	± 1.9	kJ/mol	42.0367 ± 0.0016	32038-79-2*11
Oxoethylidene		265.9	262.6	± 1.6	kJ/mol	42.0367 ± 0.0016	39920-84-8*11
Vinylidene		610.41	610.11	± 0.50	kJ/mol	26.0373 ± 0.0016	2143-69-3*1
Hydroperoxymethyl		72.9	65.6	± 1.4	kJ/mol	47.0333 ± 0.0010	74087-87-9*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	-262.4	± 1.8	kJ/mol	46.0259 ± 0.0010	19066-82-1*1
Dioxymethylidyne		299.8	301.1	± 1.7	kJ/mol	44.00950 ± 0.00100	791121-04-5*0
Isocyanic acid cation		1002.98	1000.31	± 0.49	kJ/mol	43.02423 ± 0.00086	444010-28-0*0
Fulminic acid cation		1215.6	1212.9	± 1.3	kJ/mol	43.02423 ± 0.00086	114766-65-3*0
Acetic acid			-484.89	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*840
Triiodide		-254.3	-257.5	± 3.4	kJ/mol	380.713959 ± 0.000090	14900-04-0*0
Dibromide		-199.2	-213.3	± 2.0	kJ/mol	159.8085 ± 0.0020	12595-70-9*0
Acetyl chloride			-272.13	± 0.33	kJ/mol	78.4973 ± 0.0019	75-36-5*500
Methyl formate			-388.50	± 0.86	kJ/mol	60.0520 ± 0.0017	107-31-3*500
Ethyl formate		-355.5	-374.6	± 1.4	kJ/mol	74.0785 ± 0.0025	109-94-4*2
Diazenide		175.6	176.7	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*100
2-Methoxy-2-oxoethyl		-173.3	-188.5	± 1.8	kJ/mol	73.0706 ± 0.0025	54668-31-4*2
(Acetyloxy)methyl		-174.3	-187.3	± 1.7	kJ/mol	73.0706 ± 0.0025	2887-49-2*2
Hydroxyoxoethenyl		24.3	22.5	± 1.8	kJ/mol	57.0281 ± 0.0017	702699-39-6*0
Nitronium		961.80	958.24	± 0.20	kJ/mol	46.00499 ± 0.00060	14522-82-8*0
Isocyanomethylidyne		672.2	676.5	± 1.7	kJ/mol	38.0281 ± 0.0016	53590-27-5*0
Cyanomethylidyne		684.7	689.1	± 2.1	kJ/mol	38.0281 ± 0.0016	4120-02-9*0
Tetrachloromethane		-108.69	-128.11	± 0.43	kJ/mol	153.8215 ± 0.0037	56-23-5*500
Chloride			-166.992	± 0.023	kJ/mol	35.45325 ± 0.00090	16887-00-6*800
Dichloromethylene anion		75.63	77.91	± 0.77	kJ/mol	82.9166 ± 0.0020	118364-73-1*0
Dichloromethylium		894.7	891.5	± 1.2	kJ/mol	83.9235 ± 0.0020	56932-33-3*0
Dichloromethide		-40.9	-42.6	± 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		346.15	346.45	± 0.89	kJ/mol	48.4713 ± 0.0012	2108-20-5*1
1,2-Dichloroethane			-165.75	± 0.56	kJ/mol	98.9586 ± 0.0024	107-06-2*500
1,1-Dichloroethane			-163.87	± 0.48	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
Hydrogen difluoride		-187.4	-187.1	± 1.6	kJ/mol	39.004746 ± 0.000070	12528-21-1*2
Pentachloroethane		-151.3	-157.2	± 1.9	kJ/mol	202.2928 ± 0.0048	76-01-7*0
Carbide		504.74	511.32	± 0.39	kJ/mol	24.0219 ± 0.0016	12595-78-7*0
Chloroform			-133.47	± 0.51	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
Tribromofluoromethane		-105.5	-129.5	± 1.5	kJ/mol	270.7211 ± 0.0031	353-54-8*0
Tribromochloromethane		77.6	54.8	± 1.5	kJ/mol	287.1754 ± 0.0032	594-15-0*0
Dioxygenyl ion monohydrate		828.5	821.4	± 2.1	kJ/mol	50.01353 ± 0.00091	11083-61-7*0
Ammonia			-80.885	± 0.053	kJ/mol	17.03056 ± 0.00022	7664-41-7*1000
Bromochloromethane		-28.1	-42.2	± 1.3	kJ/mol	129.3833 ± 0.0016	74-97-5*0
Fluoromethylene		148.39	148.67	± 0.43	kJ/mol	32.01704 ± 0.00080	13453-52-6*0
Iminomethide		237.3	233.5	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*1
Ethyl iodide		8.70	-7.18	± 0.49	kJ/mol	155.9656 ± 0.0016	75-03-6*0
1,2-Dibromoacetylene		333.5	322.6	± 2.3	kJ/mol	183.8294 ± 0.0026	624-61-3*0
Fluoro(fluorooxy)methylene		-97.5	-95.6	± 1.6	kJ/mol	66.00691 ± 0.00085	479587-30-9*101
Fluorooxomethylium		724.9	724.6	± 1.2	kJ/mol	47.00795 ± 0.00085	38264-00-5*0
Fluoroisoformyl		-37.8	-32.4	± 1.6	kJ/mol	47.00850 ± 0.00085	1871-24-50
Benzene cation		992.51	976.05	± 0.22	kJ/mol	78.1113 ± 0.0048	34504-50-2*0
2-Cyclopropyn-1-ylidene		898.9	905.8	± 1.6	kJ/mol	36.0321 ± 0.0024	102508-15-6*1
2-Cyclopropyn-1-ylium-1-yl		1944.8	1952.7	± 1.9	kJ/mol	36.0316 ± 0.0024	154702-35-9*0
Fluoronium		774.10	771.16	± 0.88	kJ/mol	21.01373 ± 0.00014	12206-67-6*0
1-Chloro ozone		226.3	223.1	± 2.3	kJ/mol	83.4509 ± 0.0013	141801-66-3*101
m-Chlorophenide		172.3	162.1	± 1.6	kJ/mol	111.5492 ± 0.0049	77748-34-6*0
p-Chlorophenide		179.3	168.9	± 1.5	kJ/mol	111.5492 ± 0.0049	77748-42-6*0
o-Chlorophenide		158.4	148.4	± 1.6	kJ/mol	111.5492 ± 0.0049	72863-53-7*0
Fluoronium		1490.1	1491.5	± 1.9	kJ/mol	21.01373 ± 0.00014	12206-67-6*1
2-Oxopropylium		784.5	770.7	± 1.8	kJ/mol	57.0707 ± 0.0024	54088-52-7*0
2,3-Butanedione		-310.77	-327.33	± 0.65	kJ/mol	86.0892 ± 0.0033	431-03-8*0
1,2-Dibromoethane		-11.6	-38.4	± 1.2	kJ/mol	187.8612 ± 0.0026	106-93-4*0
Oxochloronium		1150.86	1150.70	± 0.66	kJ/mol	51.45155 ± 0.00095	12301-79-0*0
2-Propynal		135.5	133.3	± 1.4	kJ/mol	54.0474 ± 0.0024	624-67-9*0
Fluorosyl fluoride		192.8	193.3	± 2.3	kJ/mol	53.99621 ± 0.00030	86825-57-2*1
1,3-Butadiyne-1,4-diyl		1052.40	1062.37	± 0.66	kJ/mol	48.0428 ± 0.0032	78015-07-3*0
Dihydrogen fluoride anion		-257.0	-260.1	± 1.9	kJ/mol	21.01483 ± 0.00014	117339-92-12
1-Isocyanoethylidene		545.5	540.7	± 1.6	kJ/mol	53.0627 ± 0.0024	498544-34-61
3-Imino-2-propen-1-ylidene		571.8	566.8	± 1.6	kJ/mol	53.0627 ± 0.0024	916765-05-4*21
2-(Methylidyneamino)ethenyl		634.5	629.8	± 1.6	kJ/mol	53.0627 ± 0.0024	123416-74-0*21
Azete		469.4	461.3	± 1.5	kJ/mol	53.0627 ± 0.0024	287-24-1*0
2-Cyanovinylium		1517.2	1515.1	± 1.8	kJ/mol	52.0542 ± 0.0024	85398-67-0*21
2-Cyanovinyl anion		263.8	260.8	± 1.8	kJ/mol	52.0553 ± 0.0024	85398-67-02
2-Isocyanovinyl		543.2	541.2	± 1.7	kJ/mol	52.0547 ± 0.0024	225798-14-1*1
3-Oxo-1,2-propadienylidene		330.0	335.9	± 2.0	kJ/mol	52.0315 ± 0.0024	11127-17-6*0
Dioxygen		94.410	94.383	± 0.000	kJ/mol	31.99880 ± 0.00060	7782-44-7*2
Vinylacetylene cation		1221.5	1215.0	± 1.1	kJ/mol	52.0740 ± 0.0032	59699-48-8*0
Bicyclo[1.1.0]but-2-ylium-1-yl		1286.8	1277.8	± 1.5	kJ/mol	52.0740 ± 0.0032	78525-41-40
Hydroxydioxonitrate		-193.2	-197.6	± 2.4	kJ/mol	63.01343 ± 0.00091	58875-09-5*0
Nitrous acid		-71.38	-77.73	± 0.26	kJ/mol	47.01348 ± 0.00061	7782-77-6*2
2-Cyclopropen-1-ylidenemethyl		635.6	632.5	± 1.3	kJ/mol	51.0666 ± 0.0032	127611-25-0*0
5-Methyl-1,3-cyclopentadiene		133.6	110.7	± 1.4	kJ/mol	80.1277 ± 0.0048	96-38-8*0
Disilicon		587.8	591.7	± 1.7	kJ/mol	56.17100 ± 0.00060	12597-35-2*0
Disiloxane		-330.0	-347.0	± 2.3	kJ/mol	78.21804 ± 0.00079	13597-73-4*0
Tetramethylsilane		-184.1	-214.6	± 2.1	kJ/mol	88.2236 ± 0.0033	75-76-3*0
Trimethylsilyl		47.8	25.8	± 2.2	kJ/mol	73.1891 ± 0.0025	16571-41-8*0
Hydroxysilyl anion		-219.2	-227.2	± 2.1	kJ/mol	47.10927 ± 0.00047	78450-47-2*1
1,2,3,5-Hexatetraene		391.6	379.8	± 1.6	kJ/mol	78.1118 ± 0.0048	60239-33-0*1
1,2,3-Pentatriene		302.4	290.1	± 1.4	kJ/mol	66.1011 ± 0.0040	62018-46-6*0
Hydrogen fluoride			-321.16	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*822
Azanylium		1266.57	1264.49	± 0.11	kJ/mol	16.02207 ± 0.00016	15194-15-7*0
Peroxyimidogen anion		165.0	162.7	± 1.7	kJ/mol	46.00609 ± 0.00060	60488-31-5*0
Chlorine difluoride anion		-504.9	-505.8	± 1.9	kJ/mol	73.45005 ± 0.00090	16892-05-0*0
Ethylene anion		232.0	224.4	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*1
Trioxidanylium		1085.2	1078.9	± 1.4	kJ/mol	49.00559 ± 0.00090	74241-49-9*2
Propynylidene cation		1410.9	1413.4	± 1.3	kJ/mol	38.0474 ± 0.0024	75123-91-0*0
Nirous oxide cation		1329.68	1326.78	± 0.12	kJ/mol	44.01233 ± 0.00033	12269-46-4*0
Propynylidene		597.4	599.2	± 1.1	kJ/mol	38.0480 ± 0.0024	67152-18-5*4
Chlorine difluoride		22.5	23.8	± 1.9	kJ/mol	73.44951 ± 0.00090	91483-78-2*0
Propadienylidenide		381.11	382.01	± 0.41	kJ/mol	38.0485 ± 0.0024	109292-49-1*0
1,2-Propadien-1-ylium-1-yl		1561.6	1562.8	± 1.4	kJ/mol	38.0474 ± 0.0024	110714-00-6*0
(E)-Diazene anion		265.5	258.7	± 2.0	kJ/mol	30.02991 ± 0.00020	59952-06-60
Nitrosyl fluoride		-85.81	-88.18	± 0.93	kJ/mol	49.00454 ± 0.00031	7789-25-5*0
Fluorodioxidenium		1221.9	1219.5	± 2.0	kJ/mol	50.99665 ± 0.00060	139584-95-5*0
2-Butyn-1-yl anion		253.4	244.6	± 1.6	kJ/mol	53.0830 ± 0.0032	65114-66-1*0
(Z)-Diazene cation	$[H]/N=[N+]\[H]$	1157.0	1150.1	± 1.3	kJ/mol	30.02881 ± 0.00020	86631-37-0*0
1-Methylene-2-propenyl		327.03	317.03	± 0.94	kJ/mol	53.0825 ± 0.0032	1204515-52-5*0
Fluorodioxidanide		-256.8	-256.1	± 1.9	kJ/mol	50.99775 ± 0.00060	23553-17-5*0
n-Pentane		-156.02	-172.99	± 0.31	kJ/mol	72.1488 ± 0.0041	109-66-0*500
iso-Pentane			-178.39	± 0.43	kJ/mol	72.1488 ± 0.0041	78-78-4*500
neo-Pentane			-189.78	± 0.39	kJ/mol	72.1488 ± 0.0041	463-82-1*500
Cyclopentane			-105.11	± 0.42	kJ/mol	70.1329 ± 0.0041	287-92-3*590
Dioxofluorine		524.0	523.2	± 1.0	kJ/mol	50.99720 ± 0.00060	175861-93-5*0
n-Hexane		-179.95	-198.60	± 0.34	kJ/mol	86.1754 ± 0.0049	110-54-3*500
Cyclohexane			-156.08	± 0.29	kJ/mol	84.1595 ± 0.0049	110-82-7*500
Oxadiazirine anion		95.1	95.5	± 2.9	kJ/mol	44.01343 ± 0.00033	350586-31-1*0
1,5-Hexadiene		108.40	83.81	± 0.40	kJ/mol	82.1436 ± 0.0049	592-42-7*0
Ethane cation		1043.12	1029.11	± 0.59	kJ/mol	30.0685 ± 0.0017	34488-65-8*0
Methyleneoxonium cation		827.7	818.3	± 1.7	kJ/mol	32.04131 ± 0.00090	177788-17-90
Perchloryloxy		248.7	241.1	± 1.8	kJ/mol	99.4503 ± 0.0015	12133-63-0*0
Perchlorate		-263.2	-272.1	± 2.2	kJ/mol	99.4508 ± 0.0015	14797-73-0*0
Hydroxymethanide		9.4	2.8	± 1.7	kJ/mol	31.03447 ± 0.00088	55830-71-2*0
Nitric acid		-179.02	-173.30	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*500
Acetylene anion		356.8	356.7	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*1
Formaldehyde		-105.376	-109.214	± 0.096	kJ/mol	30.02598 ± 0.00087	50-00-0*2
Trioxodinitrate anion		-104.2	-107.5	± 1.9	kJ/mol	76.01223 ± 0.00091	194856-62-7*100
Dicarbon monoxide cation		1433.9	1439.0	± 2.1	kJ/mol	40.0203 ± 0.0016	12287-08-0*0
1-Chloro ozone anion		-108.9	-111.4	± 2.2	kJ/mol	83.4514 ± 0.0013	224299-15-4*3
Azidonitrene		660.8	657.6	± 1.6	kJ/mol	56.02696 ± 0.00028	147363-92-6*1
C=O-C cation		1816.8	1820.9	± 2.0	kJ/mol	40.0203 ± 0.0016	83483-98-1*2
Oxirene anion		288.3	285.3	± 2.2	kJ/mol	42.0372 ± 0.0016	157-18-60
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
Oxoethylidene		261.1	258.2	± 1.1	kJ/mol	42.0367 ± 0.0016	39920-84-8*1
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
Formic acid anion		-241.2	-247.0	± 1.9	kJ/mol	46.0259 ± 0.0010	19066-82-1*2
1-Hydrazinylium-1-yl		1143.4	1136.4	± 1.4	kJ/mol	30.02881 ± 0.00020	63986-30-1*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
Dihydrogen cation		1488.364	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*0
Dioxymethylene		341.8	339.8	± 3.0	kJ/mol	45.0174 ± 0.0010	438586-67-5*2
OH-CO vdW complex		-80.26	-76.53	± 0.88	kJ/mol	45.0174 ± 0.0010	2564-85-4100
CO-HO vdW complex		-77.4	-73.2	± 1.3	kJ/mol	45.0174 ± 0.0010	2564-84-3100
Cyanato cation		1261.49	1261.99	± 0.58	kJ/mol	42.01629 ± 0.00086	17247-99-3*0
Nitrosomethyliumylidene		1509.8	1510.9	± 1.7	kJ/mol	42.01629 ± 0.00086	67197-19-7*0
Fulminate		59.5	59.8	± 1.7	kJ/mol	42.01739 ± 0.00086	28269-67-2*0
Acetic acid		-484.08	-483.65	± 0.18	kJ/mol	60.0520 ± 0.0017	64-19-7*500
Acetic acid			-484.69	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*825
Acetic acid			-484.88	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*835
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
Hydrogen fluoride			-321.18	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*823
Diazenide		347.4	344.6	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*1
Glyoxal		-189.27	-194.71	± 0.75	kJ/mol	58.0361 ± 0.0017	107-22-2*2
Glyoxal		-207.71	-213.27	± 0.61	kJ/mol	58.0361 ± 0.0017	107-22-2*0
Ethynediol		-18.4	-22.2	± 1.7	kJ/mol	58.0361 ± 0.0017	16005-17-7*0
1-Chloro ozone anion		-66.8	-68.7	± 2.1	kJ/mol	83.4514 ± 0.0013	224299-15-4*1
Hydrogen fluoride			-321.03	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*901
Dimethylaminylium		1040.3	1024.9	± 1.8	kJ/mol	44.0752 ± 0.0017	49784-85-2*0
Diisocyanogen		610.9	613.2	± 1.7	kJ/mol	52.0349 ± 0.0016	78800-21-2*0
Hydrogen fluoride			-320.88	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*815
Hydroxylamine		-15.4	-25.9	± 1.4	kJ/mol	33.02996 ± 0.00037	7803-49-8*2
Carbonic acid		-602.73	-612.04	± 0.75	kJ/mol	62.0248 ± 0.0012	463-79-6*0
Dichloromethylene		313.63	314.84	± 0.90	kJ/mol	82.9161 ± 0.0020	1605-72-7*1
Hydroxylamine cation		857.7	847.9	± 1.6	kJ/mol	33.02941 ± 0.00037	62675-55-2*0
Nitric acid			-206.32	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*839
Peroxyformic acid		-265.2	-273.1	± 1.5	kJ/mol	62.0248 ± 0.0012	107-32-4*3
Chloromethyliumyl		1207.4	1207.6	± 2.0	kJ/mol	48.4708 ± 0.0012	89877-51-0*0
Chloromethylene anion		203.44	204.26	± 0.94	kJ/mol	48.4719 ± 0.0012	75466-08-9*0
Chlorohydroxymethyl		-46.1	-51.7	± 2.0	kJ/mol	65.4787 ± 0.0012	147139-06-8*2
Dihydrogen fluoride		-55.9	-54.9	± 1.6	kJ/mol	21.01428 ± 0.00014	12592-22-2*1
1,1,2-Trichloroethane			-188.6	± 1.4	kJ/mol	133.4033 ± 0.0031	79-00-5*500
1,1,1,2-Tetrachloroethane			-193.5	± 1.1	kJ/mol	167.8481 ± 0.0039	630-20-6*500
Hexachloroethane			-216.5	± 2.8	kJ/mol	236.7376 ± 0.0056	67-72-1*500
Ethynylene cation		1965.21	1971.79	± 0.50	kJ/mol	24.0209 ± 0.0016	12595-79-8*0
3-Chloro-3-methyl-3H-diazirine		251.4	239.5	± 2.7	kJ/mol	90.5114 ± 0.0019	4222-21-3*0
trans-1,2-Dichloroethene	$C(\Cl)=C/Cl$	5.30	-0.12	± 0.54	kJ/mol	96.9427 ± 0.0024	156-60-5*0
Hydrogen peroxide cation		930.99	924.13	± 0.98	kJ/mol	34.01413 ± 0.00062	12325-10-9*2
Trioxidaniumyl		935.2	926.1	± 1.5	kJ/mol	50.01353 ± 0.00091	161321-37-5*3
Trifluoride ion		-348.8	-349.7	± 2.6	kJ/mol	56.9957582 ± 0.0000015	25730-99-8*0
Bifluoride		-705.21	-709.06	± 0.36	kJ/mol	39.005295 ± 0.000070	18130-74-0*0
Dioxaziridinyl cation		1365.9	1363.3	± 1.7	kJ/mol	46.00499 ± 0.00060	66252-29-70
Aminyliumyl		1659.04	1659.96	± 0.24	kJ/mol	15.014131 ± 0.000099	19067-62-0*0
Fluorochlorobromomethane		-218.3	-230.9	± 4.9	kJ/mol	147.3737 ± 0.0016	593-98-6*0
Nitrogen hydride oxide		71.2	60.0	± 1.5	kJ/mol	33.02996 ± 0.00037	38544-48-8*0
Hydrogen fluoride			-302.41	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*590
Fluoromethyliumyl		1116.6	1116.9	± 1.7	kJ/mol	32.01649 ± 0.00080	89877-52-1*0
Fluoromethylene anion		95.93	96.47	± 0.61	kJ/mol	32.01759 ± 0.00080	71267-42-0*0
Polytetrafluoroethylene			-829.66	± 0.58	kJ/mol	100.0150 ± 0.0016	9002-84-0*591
Fluoroniumyl ion		1275.561	1275.793	± 0.049	kJ/mol	20.005795 ± 0.000070	12381-92-9*0
Hydrofluorate ion		-75.6	-75.1	± 1.8	kJ/mol	20.006892 ± 0.000070	37249-79-9*0
trans-1,2-Difluoroethene		-299.66	-306.10	± 0.90	kJ/mol	64.0341 ± 0.0016	1630-78-0*0
Aminooxy cation		946.10	938.97	± 0.79	kJ/mol	32.02147 ± 0.00034	51375-41-80
Fluoroethynide		133.3	137.5	± 1.5	kJ/mol	43.0204 ± 0.0016	85905-56-2*0
Iminomethide		252.6	248.9	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*2
Formyl fluoride cation		816.6	813.3	± 1.3	kJ/mol	48.01589 ± 0.00086	99766-68-4*0
Formyl fluoride		-405.1	-403.7	± 1.6	kJ/mol	47.00905 ± 0.00085	62227-71-8*0
Fluoroisoformyl cation		1347.4	1349.5	± 1.9	kJ/mol	47.00795 ± 0.00085	1871-25-60
Deuterium atom cation		1532.210	1534.123	± 0.000	kJ/mol	2.01355319809 ± 0.00000000040	14464-47-2*0
Chlorine oxide peroxide		226.5	227.4	± 2.5	kJ/mol	83.4509 ± 0.0013	141801-67-4*100
o-Benzyne cation		1392.8	1384.8	± 1.7	kJ/mol	76.0954 ± 0.0048	70220-84-7*0
Hydrogen chloride			-166.683	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*841
m-Benzyne cation		1364.8	1356.2	± 1.8	kJ/mol	76.0954 ± 0.0048	121058-08-0*0
p-Benzyne		603.5	594.1	± 1.2	kJ/mol	76.0960 ± 0.0048	3355-34-8*1
Benzylium		929.47	909.98	± 0.57	kJ/mol	91.1299 ± 0.0056	6711-19-9*0
1,3-Cycloheptadiene		123.33	94.22	± 0.78	kJ/mol	94.1543 ± 0.0056	4054-38-0*1
Tropylium		898.1	878.3	± 1.1	kJ/mol	91.1299 ± 0.0056	26811-28-9*0
Hydroxyaminylium		1048.5	1041.4	± 2.6	kJ/mol	32.02147 ± 0.00034	66097-71-0*2
Hydrogen cyanide cation		1442.51	1442.05	± 0.20	kJ/mol	27.02483 ± 0.00081	12601-62-6*0
Hydroxyamidogen anion		90.7	84.8	± 2.8	kJ/mol	32.02257 ± 0.00034	66097-71-00
Acetone enol		-147.3	-164.6	± 1.3	kJ/mol	58.0791 ± 0.0025	29456-04-0*2
Nitrosyl nitrate		70.7	62.3	± 1.8	kJ/mol	92.0111 ± 0.0012	15969-55-80
cis-1,2-Dibromoethene	$C(\Br)=C\Br$	121.2	100.7	± 2.0	kJ/mol	185.8453 ± 0.0026	590-11-4*0
1,1-Dibromoethane		-5.0	-32.0	± 1.8	kJ/mol	187.8612 ± 0.0026	557-91-5*0
Nitrilomethylium		1783.16	1786.64	± 0.48	kJ/mol	26.01689 ± 0.00080	12539-57-0*0
Trioxidanyl		26.30	23.03	± 0.19	kJ/mol	49.00614 ± 0.00090	12500-78-6*2
Carbamoyl		74.1	67.7	± 2.7	kJ/mol	44.03272 ± 0.00087	2858-51-71
Formaldiminoxy		160.9	153.9	± 1.5	kJ/mol	44.03272 ± 0.00087	2683-96-7*0
(Hydroxyimino)methyl		250.1	243.9	± 1.8	kJ/mol	44.03272 ± 0.00087	206442-92-4*1
Formaldoxime		50.6	39.8	± 1.8	kJ/mol	45.04066 ± 0.00088	75-17-2*2
Oxaziridine		115.5	103.7	± 2.1	kJ/mol	45.04066 ± 0.00088	6827-26-5*0
Cyanoethynyl		715.7	722.1	± 1.2	kJ/mol	50.0388 ± 0.0024	62435-43-2*0
Dihydrooxooxygen cation		994.8	988.1	± 1.6	kJ/mol	34.01413 ± 0.00062	177329-59-8*0
2-Methylene-2H-azirine		404.2	396.8	± 1.7	kJ/mol	53.0627 ± 0.0024	110027-86-6*0
2-Cyanovinylium		1517.4	1515.2	± 1.8	kJ/mol	52.0542 ± 0.0024	85398-67-0*22
2-Cyanovinyl anion		266.1	263.2	± 1.8	kJ/mol	52.0553 ± 0.0024	85398-67-01
2-Isocyanovinyl		544.6	542.6	± 1.7	kJ/mol	52.0547 ± 0.0024	225798-14-1*2
Cyanomethylene		529.5	530.6	± 1.3	kJ/mol	39.0361 ± 0.0016	2612-62-6*2
Isocyanomethylene		586.3	587.3	± 1.7	kJ/mol	39.0361 ± 0.0016	78694-65-2*2
Dioxaziridinyl anion		295.9	293.4	± 1.7	kJ/mol	46.00609 ± 0.00060	66252-31-1*0
3-Methylenecyclopropene cation		1181.2	1174.1	± 1.4	kJ/mol	52.0740 ± 0.0032	79105-72-9*0
Chlorite		-105.51	-107.68	± 0.37	kJ/mol	67.4520 ± 0.0011	14998-27-7*0
3-Methylcycloprop-3-en-2-ylium-1-yl		1283.7	1277.2	± 1.5	kJ/mol	52.0740 ± 0.0032	185841-59-20
Vinylvinylidene cation		1429.7	1424.0	± 2.1	kJ/mol	52.0740 ± 0.0032	161054-20-2*1
1,2-Butadien-1-ylidene		511.7	506.2	± 2.1	kJ/mol	52.0746 ± 0.0032	119908-55-3*2
Dihydrogen fluoride anion		-61.9	-60.5	± 3.2	kJ/mol	21.01483 ± 0.00014	117339-92-1*2
Hydrogen bromide			-120.11	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*834
1-Buten-3-ynylium		1482.3	1479.7	± 1.5	kJ/mol	51.0661 ± 0.0032	84654-85-3*1
Propyne cation		1192.65	1186.93	± 0.38	kJ/mol	40.0633 ± 0.0024	34526-53-9*0
3-Buten-1-ynylium		1572.5	1570.1	± 1.7	kJ/mol	51.0661 ± 0.0032	103928-84-3*1
3-Methylene-1-cyclopropen-1-ylium		1398.6	1395.3	± 1.8	kJ/mol	51.0661 ± 0.0032	117469-28-0*2
3-Methylene-1-cyclopropen-1-yl anion		417.1	413.3	± 1.9	kJ/mol	51.0672 ± 0.0032	117469-28-00
Cyclobutenyl		335.7	323.2	± 2.2	kJ/mol	53.0825 ± 0.0032	24669-29-2*0
Butyraldehyde		-185.44	-205.81	± 0.85	kJ/mol	72.1057 ± 0.0033	123-72-8*0
Chloroallene		181.5	174.8	± 1.6	kJ/mol	74.5086 ± 0.0026	3223-70-9*0
1-Chloropropyne		191.3	187.2	± 1.6	kJ/mol	74.5086 ± 0.0026	7747-84-4*0
Methylcyclopentane		-68.76	-106.29	± 0.37	kJ/mol	84.1595 ± 0.0049	96-37-7*0
Dioxosilane		-905.58	-910.56	± 0.89	kJ/mol	60.08430 ± 0.00067	7631-86-9*500
Dioxosilane		-825.13	-901.06	± 0.90	kJ/mol	60.08430 ± 0.00067	7631-86-9*520
Silicon carbide cation		1602.2	1606.8	± 2.6	kJ/mol	40.09565 ± 0.00085	78393-58-5*0
Silanide		69.0	63.4	± 1.6	kJ/mol	31.10987 ± 0.00037	15807-96-2*0
Silyliumyl		1155.9	1154.3	± 1.1	kJ/mol	30.10083 ± 0.00033	28149-31-7*0
Fluorosyl fluoride anion		-147.1	-146.8	± 3.0	kJ/mol	53.99675 ± 0.00030	86825-57-22
Hydrogen chloride			-165.557	± 0.026	kJ/mol	36.46064 ± 0.00090	7647-01-0*825
Tetraoxidanyl		2.0	0.2	± 3.0	kJ/mol	65.0055 ± 0.0012	69696-93-1*100
Peroxyimidogen cation		1409.7	1406.8	± 1.9	kJ/mol	46.00499 ± 0.00060	60488-32-60
Hydrogen bromide			-120.40	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*844
Cyclopropylidene		544.6	535.8	± 1.5	kJ/mol	40.0639 ± 0.0024	2143-70-6*2
Nitrous acid		-72.991	-78.647	± 0.079	kJ/mol	47.01348 ± 0.00061	7782-77-6*0
(3E)-1,3-Hexadien-5-yne		358.7	346.4	± 1.9	kJ/mol	78.1118 ± 0.0048	5222-77-5*0
Divinylacetylene		361.7	350.3	± 2.0	kJ/mol	78.1118 ± 0.0048	821-08-9*2
1,2,4-Cyclohexatriene		419.3	403.5	± 2.0	kJ/mol	78.1118 ± 0.0048	124869-33-6*0
Pentatetraene		452.6	448.6	± 1.6	kJ/mol	64.0853 ± 0.0040	21986-03-8*0
2-Methyl-2-propanamine		-87.16	-120.81	± 0.55	kJ/mol	73.1369 ± 0.0033	75-64-9*0
Biphenyl		206.9	178.7	± 1.2	kJ/mol	154.2078 ± 0.0096	92-52-4*0
Krypton hydride cation		1106.33	1104.55	± 0.69	kJ/mol	84.8074 ± 0.1000	37276-90-7*0
1-Cyclopropene-1,2-diyl		791.0	790.6	± 1.5	kJ/mol	38.0480 ± 0.0024	202744-75-0*0
Oxiranylidene		456.1	452.1	± 2.2	kJ/mol	42.0367 ± 0.0016	50983-85-2*1
Oxiranylidene cation		1165.4	1161.9	± 2.5	kJ/mol	42.0361 ± 0.0016	50983-85-20
Oxiranylidene anion		236.4	232.4	± 2.3	kJ/mol	42.0372 ± 0.0016	50983-86-30
Nirous oxide anion		99.2	96.7	± 1.9	kJ/mol	44.01343 ± 0.00033	12274-12-3*0
Methyl hydroperoxide cation		833.5	819.5	± 2.2	kJ/mol	48.0407 ± 0.0010	112465-88-0*0
Methoxyoxoniumylidene		1012.67	1003.83	± 0.69	kJ/mol	47.0328 ± 0.0010	86475-50-5*0
Ethylidene anion		325.6	318.3	± 1.8	kJ/mol	28.0537 ± 0.0016	35829-99-3*0
Cyclopropenyliumdiyl		1692.1	1695.0	± 1.9	kJ/mol	37.0395 ± 0.0024	127476-05-5*0
Chloroniumyl ion		1137.797	1137.731	± 0.0051	kJ/mol	36.46009 ± 0.00090	12258-94-5*0
Cyclopropynyl anion		518.09	521.07	± 0.88	kJ/mol	37.0406 ± 0.0024	136861-42-2*0
Dioxirane anion		-173.0	-179.8	± 3.4	kJ/mol	46.0259 ± 0.0010	157-26-60
Dioxymethyl anion		55.0	49.8	± 1.4	kJ/mol	46.0259 ± 0.0010	93207-29-5*0
Tetranitrogen cation		1392.8	1392.5	± 1.5	kJ/mol	56.02641 ± 0.00028	12185-04-5*0
Methylammoniumyl		865.91	851.98	± 0.26	kJ/mol	31.05659 ± 0.00088	34516-31-9*0
Methanol anion		-89.1	-99.8	± 2.8	kJ/mol	32.04241 ± 0.00090	68474-04-4*0
H-CO2 vdW complex		-178.3	-177.5	± 2.1	kJ/mol	45.0174 ± 0.0010	2564-83-2100
Methylamine anion		84.2	69.3	± 2.8	kJ/mol	31.05769 ± 0.00088	81096-79-9*0
2-Propanol		-306.09	-318.90	± 0.36	kJ/mol	60.0950 ± 0.0025	67-63-0*500
1-Propanol		-290.52	-302.70	± 0.24	kJ/mol	60.0950 ± 0.0025	71-23-8*500
Nitrate			-206.64	± 0.18	kJ/mol	62.00549 ± 0.00090	14797-55-8*800
Peroxychloric acid		77.5	69.3	± 2.6	kJ/mol	100.4582 ± 0.0015	177778-91-5*0
Oxazirinyl cation		1565.5	1566.2	± 2.3	kJ/mol	42.01629 ± 0.00086	228850-18-80
Oxazirinyl anion		448.2	449.0	± 2.4	kJ/mol	42.01739 ± 0.00086	28269-68-3*0
Chlorine difluoride cation		1346.3	1344.9	± 2.1	kJ/mol	73.44896 ± 0.00090	86825-59-4*0
Chlorine difluoride anion		-319.0	-319.0	± 2.2	kJ/mol	73.45005 ± 0.00090	91419-41-9*0
1-Methoxyethenol		-284.9	-304.2	± 1.7	kJ/mol	74.0785 ± 0.0025	4453-91-2*1
Hydrogen difluoride cation		1174.3	1171.3	± 1.5	kJ/mol	39.004198 ± 0.000070	126950-54-72
Aminomethyl anion		209.4	199.2	± 2.1	kJ/mol	30.04975 ± 0.00085	74215-21-7*0
Ethyl formate			-426.1	± 1.2	kJ/mol	74.0785 ± 0.0025	109-94-4*500
Ethanium		888.7	870.3	± 1.8	kJ/mol	31.0764 ± 0.0017	24669-33-8*2
Triiodine cation		946.1	941.0	± 4.1	kJ/mol	380.712861 ± 0.000090	12596-32-6*0
Ethanium		895.1	877.3	± 1.9	kJ/mol	31.0764 ± 0.0017	24669-33-8*3
Methylaminilium		1135.0	1125.2	± 2.1	kJ/mol	30.04865 ± 0.00085	49784-84-1*0
Propionic acid		-415.8	-433.4	± 1.3	kJ/mol	74.0785 ± 0.0025	79-09-4*2
Hydrogen fluoride			-321.07	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*903
Dioxodiazoxane		109.3	105.3	± 1.8	kJ/mol	76.01168 ± 0.00091	122413-35-8*2
Methyliumylamino		1056.1	1049.3	± 1.8	kJ/mol	29.04071 ± 0.00083	65130-65-6*0
Cyanogen cation		1598.23	1600.45	± 0.42	kJ/mol	52.0343 ± 0.0016	37354-81-7*0
Isocyanogen		412.1	414.4	± 1.3	kJ/mol	52.0349 ± 0.0016	83951-85-3*0
Diazoethenylidene		658.7	661.3	± 1.8	kJ/mol	52.0349 ± 0.0016	130760-10-0*0
Ammonium bromide		-253.35	-269.93	± 0.16	kJ/mol	97.9425 ± 0.0010	12124-97-9*510
Isocyanomethyliumylidene		1615.7	1621.2	± 1.9	kJ/mol	38.0276 ± 0.0016	78271-45-1*0
Isocyanomethylidyne anion		479.2	482.9	± 2.0	kJ/mol	38.0287 ± 0.0016	53590-27-50
Cyanomethyliumylidene		1719.8	1725.3	± 2.1	kJ/mol	38.0276 ± 0.0016	76619-90-4*0
Cyanomethylidyne anion		410.0	413.7	± 2.2	kJ/mol	38.0287 ± 0.0016	12373-35-2*0
2,3-didehydro-1H-azirin-1-yl		720.3	724.4	± 2.1	kJ/mol	38.0281 ± 0.0016	439586-06-8*0
Hydrogen fluoride			-321.18	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*905
Cyanoaminylium		1362.8	1359.7	± 2.4	kJ/mol	41.03157 ± 0.00082	205443-18-1*0
Cyanoamidogen anion		69.90	66.89	± 0.94	kJ/mol	41.03267 ± 0.00082	67131-47-9*0
Cyanamide		140.8	134.5	± 1.5	kJ/mol	42.04006 ± 0.00082	420-04-2*0
Diazomethylene		579.3	580.0	± 3.8	kJ/mol	40.02418 ± 0.00081	2468-81-7*0
Hydrogen fluoride			-321.13	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*890
Trichloromethylium		854.35	852.83	± 0.93	kJ/mol	118.3683 ± 0.0028	27130-34-3*0
Azanidylmethyl		224.4	217.2	± 2.2	kJ/mol	29.04181 ± 0.00083	127593-73-1*0
Dichloromethyliumyl		1121.6	1122.6	± 1.8	kJ/mol	82.9156 ± 0.0020	55945-51-2*0
Water			-285.828	± 0.026	kJ/mol	18.01528 ± 0.00033	7732-18-5*589
Triazirine		464.1	457.7	± 2.6	kJ/mol	43.02816 ± 0.00022	157-29-9*0
Hydrogen chloride			-165.546	± 0.027	kJ/mol	36.46064 ± 0.00090	7647-01-0*953
2-Propenylidyne anion		464.5	460.7	± 1.7	kJ/mol	39.0565 ± 0.0024	120126-89-8*0
Tribromide		-287.4	-308.4	± 1.9	kJ/mol	239.7125 ± 0.0030	14522-80-6*0
Aminomethyliumyl		1039.5	1031.9	± 2.3	kJ/mol	29.04071 ± 0.00083	89302-94-3*0
Fluorosyl fluoride anion		-56.6	-55.7	± 2.4	kJ/mol	53.99675 ± 0.00030	86825-57-21
2-Propen-3-yliumylidene		1494.4	1491.4	± 1.7	kJ/mol	39.0554 ± 0.0024	84654-86-4*0
2-Chloro ozone anion		-103.3	-105.5	± 3.2	kJ/mol	83.4514 ± 0.0013	141801-67-40
2-Propenylidene anion		535.8	532.4	± 1.7	kJ/mol	39.0565 ± 0.0024	98705-30-7*0
Aminomethylene anion		353.0	346.1	± 2.3	kJ/mol	29.04181 ± 0.00083	207914-86-1*0
Deuterium hydride cation		1490.498	1490.587	± 0.000	kJ/mol	3.021493 ± 0.000070	12181-16-7*0
Methylimidogen anion		321.1	313.5	± 1.4	kJ/mol	29.04181 ± 0.00083	82539-34-2*0
Chlorosyl chloride cation		1132.6	1130.8	± 2.0	kJ/mol	86.9043 ± 0.0018	86825-56-10
Methyleneaminylium		1456.6	1453.0	± 2.1	kJ/mol	28.03277 ± 0.00082	53518-13-1*1
Trifluorine cation		1529.5	1527.4	± 2.3	kJ/mol	56.9946610 ± 0.0000015	64710-22-1*0
Cyclopentene			6.88	± 0.52	kJ/mol	68.1170 ± 0.0040	142-29-0*590
Hydrogen fluoride			-321.18	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*891
Chloromethane cation		1014.97	1008.20	± 0.25	kJ/mol	50.4867 ± 0.0012	12538-71-5*0
Hydrogen chloride			-166.713	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*951
Cyanogen bromide anion		58.2	54.5	± 3.8	kJ/mol	105.9220 ± 0.0013	54092-05-6*0
Bromine atom		117.917	111.855	± 0.056	kJ/mol	79.90400 ± 0.00100	10097-32-2*1
Bromofluoromethane		-197.4	-211.9	± 4.9	kJ/mol	112.9290 ± 0.0013	373-52-4*0
Chlorosyl chloride anion		-185.4	-184.7	± 2.3	kJ/mol	86.9053 ± 0.0018	86825-55-00
Fluorodibromomethane		-159.7	-179.3	± 4.9	kJ/mol	191.8250 ± 0.0022	1868-53-7*0
Difluorochlorobromomethane		-428.9	-439.9	± 4.9	kJ/mol	165.3642 ± 0.0016	353-59-3*0
Dichlorofluorobromomethane		-228.3	-238.3	± 4.9	kJ/mol	181.8185 ± 0.0022	353-58-2*0
Dibromofluorochloromethane		-169.9	-186.8	± 4.9	kJ/mol	226.2698 ± 0.0023	353-55-9*0
Krypton cation		1350.756	1350.756	± 0.000	kJ/mol	83.7995 ± 0.1000	16915-28-9*0
Chloryl chloride		126.1	122.1	± 1.7	kJ/mol	102.9042 ± 0.0019	117489-73-3*0
1-Ethylium-1-yl		1182.0	1174.6	± 3.2	kJ/mol	28.0526 ± 0.0016	85944-79-2*0
Cyclohexene		27.03	-4.43	± 0.32	kJ/mol	82.1436 ± 0.0049	110-83-8*0
Cyclohexene		-22.12	-37.99	± 0.31	kJ/mol	82.1436 ± 0.0049	110-83-8*500
1,2-Difluoroacetylene cation		1081.7	1084.5	± 1.3	kJ/mol	62.0177 ± 0.0016	268566-70-7*0
iso-Proplylide		128.6	110.2	± 1.5	kJ/mol	43.0882 ± 0.0024	25012-80-0*0
Difluorophosgene cation		653.45	650.69	± 0.51	kJ/mol	66.00636 ± 0.00085	73256-56-1*0
1,2-Propadien-1-yl-3-ylidene anion		622.0	629.4	± 1.3	kJ/mol	36.0326 ± 0.0024	109292-47-9*0
Dibromine			-2.16	± 0.20	kJ/mol	159.8080 ± 0.0020	7726-95-6*800
Hypofluorous acid cation		1142.01	1138.99	± 0.87	kJ/mol	36.00519 ± 0.00031	90243-22-4*0
Chloro(chlorooxy)methylene		73.5	73.7	± 3.6	kJ/mol	98.9155 ± 0.0020	479587-31-0*2
Aminooxy anion		47.4	40.5	± 1.7	kJ/mol	32.02257 ± 0.00034	51375-41-8*0
Chlorohydroxymethylene		13.9	10.9	± 2.6	kJ/mol	64.4707 ± 0.0012	147723-60-2*1
(Chlorooxy)methylene		119.1	117.8	± 2.7	kJ/mol	64.4707 ± 0.0012	331419-80-8*2
Dibromophosgene			-144.07	± 0.95	kJ/mol	187.8181 ± 0.0022	593-95-3*590
Dioxygen		-0.000	-0.000	± 0.000	kJ/mol	31.99880 ± 0.00060	7782-44-7*1
2-Chloroethanol			-314.92	± 0.53	kJ/mol	80.5132 ± 0.0019	107-07-3*590
2-Bromoethanol			-274.52	± 0.47	kJ/mol	124.9645 ± 0.0019	540-51-2*590
Hydrogen fluoride			-321.06	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*888
Phenylium		1148.55	1135.77	± 0.85	kJ/mol	77.1034 ± 0.0048	17333-73-2*2
2-Cyclopropyn-1-ylidene		993.2	1000.1	± 2.5	kJ/mol	36.0321 ± 0.0024	102508-15-6*2
m-Benzyne anion		444.1	435.2	± 1.3	kJ/mol	76.0965 ± 0.0048	249589-31-9*0
p-Benzyne anion		465.0	455.4	± 1.3	kJ/mol	76.0965 ± 0.0048	219298-17-6*0
2-Cyclopropyn-1-yl anion		664.8	672.1	± 1.6	kJ/mol	36.0326 ± 0.0024	500574-36-7*0
Cycloheptane		-126.86	-156.75	± 0.51	kJ/mol	98.1861 ± 0.0057	291-64-5*500
Aminomethyliumylidene		1168.3	1165.1	± 2.2	kJ/mol	28.03277 ± 0.00082	86784-42-1*0
Ethylbenzene			-12.53	± 0.55	kJ/mol	106.1650 ± 0.0064	100-41-4*500
Nitrosyl nitrate		48.3	40.4	± 1.8	kJ/mol	92.0111 ± 0.0012	15969-55-8*1
Phenylacetylene			273.4	± 1.1	kJ/mol	102.1332 ± 0.0064	536-74-3*500
Hypochlorous acid cation		998.92	995.87	± 0.90	kJ/mol	52.45949 ± 0.00095	71606-47-8*0
Phenyloxoniumylidene		901.4	887.1	± 2.2	kJ/mol	93.1028 ± 0.0048	41071-17-4*0
Anisole		-47.81	-72.66	± 0.79	kJ/mol	108.1378 ± 0.0056	100-66-3*0
Hydrogen chloride			-165.979	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*829
Ethylene anion		231.5	225.4	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*2
Fluorobenzene		-151.80	-149.39	± 0.89	kJ/mol	96.1023 ± 0.0048	462-06-6*500
Oxobromonium		1139.4	1131.7	± 1.5	kJ/mol	95.9029 ± 0.0010	142315-39-7*0
Bromobenzene			59.9	± 1.3	kJ/mol	157.0079 ± 0.0049	108-86-1*500
Acetone		-245.00	-248.12	± 0.35	kJ/mol	58.0791 ± 0.0025	67-64-1*500
1-Hydroxyethanide		-20.3	-33.7	± 2.2	kJ/mol	45.0610 ± 0.0017	88032-18-2*0
Propionaldehyde		-218.17	-216.71	± 0.28	kJ/mol	58.0791 ± 0.0025	123-38-6*500
Ethyl nitrite		-81.38	-98.78	± 0.88	kJ/mol	75.0666 ± 0.0017	109-95-5*0
Hydrogen bromide			-120.34	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*952
trans-1,2-Dibromoethene	$C(\Br)=C/Br$	121.5	101.7	± 2.0	kJ/mol	185.8453 ± 0.0026	590-12-5*0
1,1-Dibromoethene		125.4	105.1	± 2.1	kJ/mol	185.8453 ± 0.0026	593-92-0*0
Norbornadiene		267.5	242.0	± 1.0	kJ/mol	92.1384 ± 0.0056	121-46-0*0
Monoammonium succinate			-1067.96	± 0.72	kJ/mol	135.1186 ± 0.0035	38457-08-8*510
Diammonium succinate			-1182.50	± 0.48	kJ/mol	152.1492 ± 0.0035	2226-88-2*510
Hydrooxonitrate		78.62	75.70	± 0.99	kJ/mol	31.01463 ± 0.00032	66057-02-1*0
Nitric acid cation		1029.13	1020.07	± 0.69	kJ/mol	63.01233 ± 0.00091	272109-63-4*0
Hydroxyimidogen anion		229.8	227.4	± 2.2	kJ/mol	31.01463 ± 0.00032	35337-59-80
Acrolein		-46.5	-56.8	± 1.4	kJ/mol	56.0633 ± 0.0024	107-02-8*2
Ethenedione		14.9	17.3	± 2.2	kJ/mol	56.0202 ± 0.0017	4363-38-6*0
Ethenedione cation		909.7	912.8	± 2.3	kJ/mol	56.0197 ± 0.0017	12541-99-0*0
Hydrogen chloride			-166.637	± 0.025	kJ/mol	36.46064 ± 0.00090	7647-01-0*840
Fluorine atom cation		1758.306	1760.604	± 0.048	kJ/mol	18.99785462 ± 0.00000050	14701-13-4*0
Hypobromous acid cation		975.01	964.39	± 0.53	kJ/mol	96.9108 ± 0.0010	154804-02-1*0
Dinitrogen pentoxide			-41.02	± 0.42	kJ/mol	108.0105 ± 0.0015	10102-03-1*500
3-Imino-2-propen-1-ylidene		532.9	527.9	± 1.8	kJ/mol	53.0627 ± 0.0024	916765-05-4*12
3-Imino-2-propen-1-ylidene		572.5	567.3	± 2.0	kJ/mol	53.0627 ± 0.0024	916765-05-4*22
2-(Methylidyneamino)ethenyl		604.5	599.6	± 1.9	kJ/mol	53.0627 ± 0.0024	123416-74-0*12
2-(Methylidyneamino)ethenyl		637.1	632.3	± 2.0	kJ/mol	53.0627 ± 0.0024	123416-74-0*22
Hypochlorous acid anion		198.7	198.4	± 2.5	kJ/mol	52.46059 ± 0.00095	34524-94-2*0
1-Cyanovinylium		1318.3	1317.1	± 2.2	kJ/mol	52.0542 ± 0.0024	85399-09-3*0
Hydrogen bromide			-120.35	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*842
Diazenium		968.64	957.38	± 0.73	kJ/mol	31.03675 ± 0.00025	37369-93-0*0
(Methylmethylene)oxonium		685.6	671.3	± 2.3	kJ/mol	45.0600 ± 0.0017	23653-97-6*0
Methoxymethyl anion		23.0	10.0	± 2.3	kJ/mol	45.0610 ± 0.0017	61192-30-1*0
Cyclopropylide		264.7	251.9	± 1.8	kJ/mol	41.0723 ± 0.0024	1724-45-4*0
Acetaldehyde anion		-62.2	-72.5	± 2.2	kJ/mol	44.0531 ± 0.0017	60427-04-5*0
Tetraoxygen		145.8	142.2	± 3.8	kJ/mol	63.9976 ± 0.0012	12596-83-7*22
Butatriene cation		1210.3	1204.4	± 1.3	kJ/mol	52.0740 ± 0.0032	65513-85-1*0
3-Methanetetrayl-1,2-cyclopropanediylidene		1154.8	1164.2	± 1.9	kJ/mol	48.0428 ± 0.0032	78015-08-4*0
Bicyclo[1.1.0]but-3-ene		483.1	474.1	± 1.6	kJ/mol	52.0746 ± 0.0032	78525-41-4*0
Vinylvinylidene anion		405.7	398.9	± 2.1	kJ/mol	52.0751 ± 0.0032	167386-49-4*1
Tetrahedrane cation		1326.6	1318.4	± 1.8	kJ/mol	52.0740 ± 0.0032	80826-01-3*0
Bicyclo[1.1.0]but-1(3)-ene		578.7	570.3	± 2.0	kJ/mol	52.0746 ± 0.0032	58208-49-4*0
Bicyclo[1.1.0]but-1(3)-ene cation		1461.5	1453.4	± 2.1	kJ/mol	52.0740 ± 0.0032	58208-49-40
Hydrogen bromide			-120.30	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*841
2-Cyclopropyn-1-ylidenemethyl anion		800.9	809.9	± 1.7	kJ/mol	48.0433 ± 0.0032	289679-90-9*0
Imidogen anion		322.62	322.67	± 0.16	kJ/mol	15.015229 ± 0.000099	23841-33-0*0
1-Buten-3-yn-1-yl		547.7	544.9	± 1.2	kJ/mol	51.0666 ± 0.0032	2810-61-9*2
Hypofluorous acid anion		155.3	154.7	± 2.6	kJ/mol	36.00629 ± 0.00031	36505-07-4*2
Trioxidanylium		1070.4	1064.2	± 1.4	kJ/mol	49.00559 ± 0.00090	74241-49-9*0
1-Hydroxyethenyl		121.31	114.93	± 0.99	kJ/mol	43.0446 ± 0.0016	81847-74-7*0
3-Buten-1-ynylium		1603.7	1602.7	± 1.7	kJ/mol	51.0661 ± 0.0032	103928-84-3*2
3-Methylene-1-cyclopropen-1-ylium		1467.5	1463.9	± 1.6	kJ/mol	51.0661 ± 0.0032	117469-28-0*1
Triazirinylium ion		1608.9	1606.0	± 1.6	kJ/mol	42.01967 ± 0.00021	92220-05-8*0
2-Cyclopropen-1-ylidenemethylium		1346.3	1343.7	± 1.8	kJ/mol	51.0661 ± 0.0032	112936-36-4*2
1,3-Cyclobutadien-1-ylium		1388.2	1383.2	± 1.9	kJ/mol	51.0661 ± 0.0032	81913-77-1*2
Cyanic azide		502.7	498.3	± 1.9	kJ/mol	68.03766 ± 0.00085	764-05-6*0
Phenyl hydroperoxide		13.0	-6.0	± 2.1	kJ/mol	110.1106 ± 0.0049	36112-26-2*0
Methylcyclopentane		-116.71	-138.07	± 0.36	kJ/mol	84.1595 ± 0.0049	96-37-7*500
Carbon		711.398	716.883	± 0.045	kJ/mol	12.01070 ± 0.00080	7440-44-0*1
Dioxosilane		-905.58	-910.56	± 0.89	kJ/mol	60.08430 ± 0.00067	7631-86-9*505
Dioxosilane		-902.88	-907.74	± 0.93	kJ/mol	60.08430 ± 0.00067	7631-86-9*510
Formaldehyde anion		-26.7	-28.3	± 2.0	kJ/mol	30.02653 ± 0.00087	27837-46-3*0
Propynylidene		543.45	546.45	± 0.65	kJ/mol	38.0480 ± 0.0024	67152-18-5*0
Ammonium chloride		-311.556	-314.718	± 0.063	kJ/mol	53.49120 ± 0.00095	12125-02-9*510
Silylene anion		168.0	166.4	± 1.6	kJ/mol	30.10193 ± 0.00033	54991-62-7*0
Silylidyne		371.45	373.24	± 0.81	kJ/mol	29.09344 ± 0.00031	13774-94-2*0
Silyliumylidene		1134.7	1135.9	± 1.2	kJ/mol	29.09289 ± 0.00031	31241-66-4*0
Isocyanomethylium		1272.9	1270.7	± 2.2	kJ/mol	40.0435 ± 0.0016	78269-43-9*0
Carbon		833.329	838.475	± 0.045	kJ/mol	12.01070 ± 0.00080	7440-44-0*2
1-Propenylidene		630.3	622.8	± 1.7	kJ/mol	40.0639 ± 0.0024	70277-78-0*2
Formaldehyde		196.015	192.684	± 0.096	kJ/mol	30.02598 ± 0.00087	50-00-0*1
Hydrogen chloride			-165.946	± 0.026	kJ/mol	36.46064 ± 0.00090	7647-01-0*907
Ketene cation		882.22	879.05	± 0.11	kJ/mol	42.0361 ± 0.0016	64999-16-2*0
Ketene anion		-16.0	-19.1	± 2.2	kJ/mol	42.0372 ± 0.0016	56391-79-8*0
Tribromine		155.9	134.2	± 3.2	kJ/mol	239.7120 ± 0.0030	11094-39-6*0
Fluorosyl fluoride cation		1413.1	1413.5	± 3.5	kJ/mol	53.99566 ± 0.00030	86825-50-51
Ammonium radical		190.01	179.42	± 0.43	kJ/mol	18.03850 ± 0.00029	92075-50-8*0
Dewar benzene		422.0	405.0	± 1.8	kJ/mol	78.1118 ± 0.0048	5649-95-6*0
Acetylene anion		380.1	380.3	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*2
Hydroxyoxoammoniumyl		984.1	977.7	± 1.8	kJ/mol	47.01293 ± 0.00061	80371-48-8*0
Ozone cation		1352.871	1350.532	± 0.041	kJ/mol	47.99765 ± 0.00090	12596-82-6*0
1,2-Hexadien-4-yne		407.3	397.3	± 1.7	kJ/mol	78.1118 ± 0.0048	34783-10-3*0
3-Methylene-1-penten-4-yne		362.5	349.9	± 2.2	kJ/mol	78.1118 ± 0.0048	6929-96-0*1
Oxoethenylium		1139.7	1142.4	± 2.1	kJ/mol	41.0282 ± 0.0016	92056-63-8*0
3-Methyl-1,4-pentadiyne		438.9	427.4	± 1.6	kJ/mol	78.1118 ± 0.0048	57242-04-3*0
2-Methyl-2-propanamine		-133.26	-150.74	± 0.54	kJ/mol	73.1369 ± 0.0033	75-64-9*500
1,2-Diphenylethane		84.66	50.92	± 0.76	kJ/mol	182.2610 ± 0.0112	103-29-7*500
Anthracene		255.86	226.84	± 0.99	kJ/mol	178.2292 ± 0.0112	120-12-7*0
Anthracene		150.49	124.68	± 0.93	kJ/mol	178.2292 ± 0.0112	120-12-7*500
Bromine dioxide		167.1	157.5	± 3.0	kJ/mol	111.9028 ± 0.0012	21255-83-4*0
Phenanthrene		136.13	110.85	± 0.67	kJ/mol	178.2292 ± 0.0112	85-01-8*500
Diphenylacetylene		334.6	312.7	± 1.1	kJ/mol	178.2292 ± 0.0112	501-65-5*500
Hydroperoxyimidogen		103.3	99.8	± 2.4	kJ/mol	47.01348 ± 0.00061	877456-58-1*1
Bicyclo[1.1.0]buta-1,1-diene-2,4-diyl		990.3	993.6	± 2.0	kJ/mol	49.0507 ± 0.0032	99417-53-50
Benzoic acid		-274.39	-294.19	± 0.20	kJ/mol	122.1213 ± 0.0056	65-85-0*0
Hydraziniumyl		886.6	873.3	± 2.0	kJ/mol	32.04469 ± 0.00031	20771-51-1*0
Peroxychlorous acid		103.5	97.7	± 2.5	kJ/mol	84.4588 ± 0.0013	177778-92-6*2
Carbon dioxide anion		-340.6	-340.1	± 2.2	kJ/mol	44.01005 ± 0.00100	14485-07-5*0
Cyanoaminyliumyl		1672.2	1673.6	± 2.6	kJ/mol	40.02363 ± 0.00081	316122-03-9*0
Cyanoamidogen anion		211.72	211.65	± 0.62	kJ/mol	40.02473 ± 0.00081	189879-95-6*0
Dioxiranylidene cation		1409.1	1410.3	± 2.6	kJ/mol	44.00895 ± 0.00100	138832-57-20
Ethyl hydroperoxide			-210.	± 20.	kJ/mol	62.0678 ± 0.0018	3031-74-1*500
Cyanamide			58.89	± 0.54	kJ/mol	42.04006 ± 0.00082	420-04-2*500
Hydrogen fluoride			-321.12	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*904
Diazomethyliumyl		1641.2	1642.4	± 4.1	kJ/mol	40.02363 ± 0.00081	307495-90-5*0
Diazomethylene anion		408.3	408.5	± 3.8	kJ/mol	40.02473 ± 0.00081	205498-92-6*0
3H-Diazirin-3-ylidene		579.0	579.4	± 2.7	kJ/mol	40.02418 ± 0.00081	253308-70-2*0
Dioxiranylidene anion		-110.2	-109.7	± 3.0	kJ/mol	44.01005 ± 0.00100	138832-58-30
2-Butynylium		1085.6	1077.4	± 1.6	kJ/mol	53.0820 ± 0.0032	64235-83-2*2
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
Peroxynitrous acid		-5.80	-11.63	± 0.36	kJ/mol	63.01288 ± 0.00091	14691-52-2*0
Formic acid		-431.54	-424.71	± 0.20	kJ/mol	46.0254 ± 0.0010	64-18-6*500
Peroxyhypochlorous acid anion		-32.2	-34.0	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-32
Dioxodiazoxane		125.7	120.4	± 2.1	kJ/mol	76.01168 ± 0.00091	122413-35-8*3
1,1,1-Trichloroethane			-177.54	± 0.49	kJ/mol	133.4033 ± 0.0031	71-55-6*500
Carbon monoxide		465.578	469.285	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*1
Isodiazene anion		380.9	374.1	± 2.1	kJ/mol	30.02991 ± 0.00020	63986-30-10
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
(Z)-Diazene anion	$[H]/N=[N-]\[H]$	280.0	273.3	± 2.0	kJ/mol	30.02991 ± 0.00020	86631-37-00
Oxadiazirine cation		1509.9	1507.2	± 2.4	kJ/mol	44.01233 ± 0.00033	227934-45-40
1,1-Dichloroethene			-23.80	± 0.50	kJ/mol	96.9427 ± 0.0024	75-35-4*500
Dioxymethylidyne cation		1436.6	1439.0	± 2.7	kJ/mol	44.00895 ± 0.00100	791121-04-52
Dihydrogen fluoride		-56.5	-54.1	± 1.7	kJ/mol	21.01428 ± 0.00014	12592-22-2*2
Peroxyhypochlorite		-252.68	-251.66	± 0.35	kJ/mol	67.4520 ± 0.0011	224299-14-3*0
Hydrogen chloride			-166.741	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*842
Formyloxidanyl		-125.90	-127.26	± 0.56	kJ/mol	45.0174 ± 0.0010	16499-21-1*0
Hydrogen difluoride cation		1241.	1238.	± 17.	kJ/mol	39.004198 ± 0.000070	126950-54-7*1
Dichloromethane			-122.39	± 0.54	kJ/mol	84.9320 ± 0.0020	75-09-2*590
Dioxiranyl		217.3	213.9	± 2.0	kJ/mol	45.0174 ± 0.0010	120595-16-6*0
Propane cation		974.6	954.5	± 1.7	kJ/mol	44.0951 ± 0.0025	34479-70-4*0
Hydroxylamine			-97.1	± 2.2	kJ/mol	33.02996 ± 0.00037	7803-49-8*1000
Isoprene			48.82	± 0.69	kJ/mol	68.1170 ± 0.0040	78-79-5*500
Azide			272.64	± 0.48	kJ/mol	42.02077 ± 0.00021	14343-69-2*800
Difluoromethylene anion		-211.16	-209.98	± 0.58	kJ/mol	50.00805 ± 0.00080	66212-40-6*0
Dihydrogen		1.417	0.019	± 0.000	kJ/mol	2.01588 ± 0.00014	1333-74-0*1
Fluoromethylidyne anion		200.8	204.3	± 1.9	kJ/mol	31.00965 ± 0.00080	33412-12-3*0
Hydrazine		57.25	50.69	± 0.18	kJ/mol	32.04524 ± 0.00031	302-01-2*500
Ethynylene		827.55	834.26	± 0.26	kJ/mol	24.0214 ± 0.0016	12070-15-4*1
Oxygen atom hexacation		42035.28	42037.14	± 0.12	kJ/mol	15.99611 ± 0.00030	14158-22-6*0
Trioxidane		-82.01	-90.61	± 0.63	kJ/mol	50.01408 ± 0.00091	14699-99-1*0
2,4,5-Trioxa-1,3-diazabicyclo[1.1.1]pentane		602.5	593.3	± 2.1	kJ/mol	76.01168 ± 0.00091	224950-18-9*0
Ethoxyethane		-265.46	-277.78	± 0.82	kJ/mol	74.1216 ± 0.0033	60-29-7*500
Bromosyl bromide		179.0	163.2	± 2.1	kJ/mol	175.8074 ± 0.0020	68322-97-4*0
Hydrogen fluoride			-321.04	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*887
Triiodine		153.4	149.4	± 3.6	kJ/mol	380.713410 ± 0.000090	12596-31-5*0
Isocyanogen iodide		341.7	342.0	± 4.9	kJ/mol	152.92191 ± 0.00080	66004-32-8*0
Difluorovinylidene		129.4	130.6	± 2.2	kJ/mol	62.0182 ± 0.0016	41895-33-4*0
1,2-Propadien-1-ylium-1-yl-3-ylidene		1981.5	1989.4	± 2.2	kJ/mol	36.0316 ± 0.0024	118090-85-0*1
Fluoroethynylium		1536.2	1540.9	± 2.3	kJ/mol	43.0193 ± 0.0016	268566-69-4*0
n-Heptane		-201.65	-224.11	± 0.46	kJ/mol	100.2019 ± 0.0057	142-82-5*500
Bromoacetylene		282.2	275.7	± 1.6	kJ/mol	104.9333 ± 0.0019	593-61-3*0
n-Octane		-226.49	-249.61	± 0.55	kJ/mol	114.2285 ± 0.0065	111-65-9*500
Hydrazoic acid anion		309.0	302.7	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*1
n-Nonane		-247.83	-274.69	± 0.50	kJ/mol	128.2551 ± 0.0073	111-84-2*500
Chloro(chlorooxy)methylene		98.	101.	± 15.	kJ/mol	98.9155 ± 0.0020	479587-31-0*11
Chlorooxomethylium		783.7	783.9	± 2.2	kJ/mol	63.4623 ± 0.0012	38264-03-8*0
Hydrochlorate ion		-25.2	-24.2	± 2.5	kJ/mol	36.46119 ± 0.00090	63099-75-2*0
Chlorine hydride oxide		165.2	155.3	± 2.5	kJ/mol	84.4588 ± 0.0013	1027055-52-2*0
2-Iodoethanol			-207.2	± 2.4	kJ/mol	171.9650 ± 0.0017	624-76-0*590
1,3-Butadiyne cation		1440.13	1441.99	± 0.64	kJ/mol	50.0581 ± 0.0032	55468-55-8*0
Chlorine chlorite		177.4	175.0	± 2.2	kJ/mol	102.9042 ± 0.0019	105206-44-8*2
Carbon suboxide cation		928.3	931.8	± 1.3	kJ/mol	68.0304 ± 0.0025	151528-67-5*0
Carbon suboxide anion		-131.4	-128.0	± 2.5	kJ/mol	68.0314 ± 0.0025	109362-94-9*0
Benzene anion		209.1	197.2	± 1.2	kJ/mol	78.1124 ± 0.0048	34562-85-1*0
Methanol dimer		-398.5	-419.1	± 1.4	kJ/mol	64.0837 ± 0.0018	42845-44-3*0
Trioxirane		272.7	270.1	± 1.3	kJ/mol	47.99820 ± 0.00090	153851-84-4*0
Tetraoxodinitrogen cation		1030.6	1025.2	± 2.6	kJ/mol	92.0105 ± 0.0012	64476-91-1*0
n-Decane		-273.01	-300.56	± 0.80	kJ/mol	142.2817 ± 0.0081	124-18-5*500
Cyclopropenylidene anion		544.2	543.8	± 2.2	kJ/mol	38.0485 ± 0.0024	16165-40-50
o-Benzyne		625.6	616.3	± 1.1	kJ/mol	76.0960 ± 0.0048	462-80-6*1
Trioxidanyl		25.32	23.23	± 0.13	kJ/mol	49.00614 ± 0.00090	12500-78-6*0
1,5-Hexadiene			54.44	± 0.32	kJ/mol	82.1436 ± 0.0049	592-42-7*500
Methylamine			-45.25	± 0.45	kJ/mol	31.05714 ± 0.00088	74-89-5*500
m-Benzyne		527.0	518.5	± 1.2	kJ/mol	76.0960 ± 0.0048	1828-89-3*0
1-Methyl-1-ethylium-1-yl		1058.1	1045.6	± 1.9	kJ/mol	42.0792 ± 0.0024	121408-19-3*0
p-Benzyne cation		1424.9	1417.7	± 2.1	kJ/mol	76.0954 ± 0.0048	121058-09-1*0
p-Benzyne		587.0	577.6	± 1.2	kJ/mol	76.0960 ± 0.0048	3355-34-8*0
Difluorodioxidanium		1283.7	1279.1	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-01
Toluene		19.82	12.07	± 0.33	kJ/mol	92.1384 ± 0.0056	108-88-3*500
Oxygen difluoride anion		-202.0	-201.9	± 2.7	kJ/mol	53.99675 ± 0.00030	7783-41-70
Cyclopentadienylium		1087.73	1074.87	± 0.92	kJ/mol	65.0927 ± 0.0040	29661-18-5*0
Cycloheptene		-25.5	-46.6	± 1.7	kJ/mol	96.1702 ± 0.0057	628-92-2*500
NON cation		1443.9	1444.1	± 2.8	kJ/mol	44.01233 ± 0.00033	227934-46-50
Cycloheptatriene		153.83	145.05	± 0.97	kJ/mol	92.1384 ± 0.0056	544-25-2*500
Phenylethene			104.31	± 0.48	kJ/mol	104.1491 ± 0.0064	100-42-5*500
Tetrazete		764.9	759.0	± 1.8	kJ/mol	56.02696 ± 0.00028	42851-09-2*0
Phenol		-146.50	-162.35	± 0.65	kJ/mol	94.1112 ± 0.0048	108-95-2*500
Cycloprop-2-enylide		514.8	511.8	± 2.2	kJ/mol	39.0565 ± 0.0024	20829-57-6*0
Dihydrogen cation		1489.060	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*1
Anisole			-119.58	± 0.77	kJ/mol	108.1378 ± 0.0056	100-66-3*500
Hydrogen difluoride cation		1267.6	1265.4	± 4.1	kJ/mol	39.004198 ± 0.000070	126950-54-71
Benzaldehyde		-85.7	-86.8	± 1.1	kJ/mol	106.1219 ± 0.0056	100-52-7*500
Isopropylidene anion		282.4	268.2	± 2.0	kJ/mol	42.0803 ± 0.0024	121408-19-30
2-Propen-3-ylium-1-ylidyne		1791.1	1792.7	± 2.6	kJ/mol	38.0474 ± 0.0024	161054-36-0*0
Fluorobenzene anion		-18.3	-30.2	± 1.8	kJ/mol	96.1029 ± 0.0048	34561-55-2*0
m-Chlorophenylium		1160.1	1150.0	± 2.6	kJ/mol	111.5481 ± 0.0049	127983-85-1*0
p-Chlorophenylium		1147.4	1137.9	± 2.5	kJ/mol	111.5481 ± 0.0049	42766-43-8*0
o-Chlorophenylium		1166.7	1157.4	± 2.5	kJ/mol	111.5481 ± 0.0049	137963-70-3*0
1,3-Propanediyl		320.0	308.2	± 1.6	kJ/mol	42.0797 ± 0.0024	32458-33-6*1
Hydronium radical		-18.5	-21.6	± 2.1	kJ/mol	19.02322 ± 0.00037	12168-76-2*100
Iodobenzene cation		1022.82	1007.38	± 0.99	kJ/mol	204.0078 ± 0.0048	38406-85-8*0
Nitrobenzene			6.6	± 1.4	kJ/mol	123.1094 ± 0.0049	98-95-3*500
Hydrogen chloride			-166.105	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*830
Nitromethane		-114.15	-112.97	± 0.43	kJ/mol	61.0401 ± 0.0010	75-52-5*500
Acetic acid			-484.89	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*839
2,2,4-Trimethylpentane		-224.4	-258.9	± 1.5	kJ/mol	114.2285 ± 0.0065	540-84-1*500
cis-1,2-Diiodoethene	$C(\I)=C\I$	217.41	209.13	± 0.35	kJ/mol	279.8462 ± 0.0016	590-26-1*0
trans-1,2-Diiodoethene	$C(\I)=C/I$	215.07	207.68	± 0.35	kJ/mol	279.8462 ± 0.0016	590-27-2*0
Norbornadiene			208.7	± 1.2	kJ/mol	92.1384 ± 0.0056	121-46-0*500
2,3-Butanedione			-365.64	± 0.53	kJ/mol	86.0892 ± 0.0033	431-03-8*500
Succinic acid		-802.5	-824.7	± 3.0	kJ/mol	118.0880 ± 0.0034	110-15-6*0
Nitric acid trihydrate		-1062.10	-1055.25	± 0.21	kJ/mol	117.0587 ± 0.0019	13444-83-2*500
1,2-Diiodoethane		87.80	73.13	± 0.90	kJ/mol	281.8621 ± 0.0016	624-73-7*0
1,2-Diiodoethane			9.26	± 0.60	kJ/mol	281.8621 ± 0.0016	624-73-7*500
2-Butanone		-267.89	-273.38	± 0.79	kJ/mol	72.1057 ± 0.0033	78-93-3*500
Tetraazatetrahedrane		763.7	757.2	± 1.7	kJ/mol	56.02696 ± 0.00028	12596-63-3*0
Methyl acetate			-445.68	± 0.60	kJ/mol	74.0785 ± 0.0025	79-20-9*500
Acrolein			-95.7	± 1.4	kJ/mol	56.0633 ± 0.0024	107-02-8*500
Bicyclo[1.1.0]buta-1,3-dien-4-ylium-2-yl		2087.7	2097.6	± 2.3	kJ/mol	48.0423 ± 0.0032	289679-91-0*0
Bicyclo[1.1.0]buta-1,3-dien-2-yl anion		803.2	810.8	± 1.8	kJ/mol	48.0433 ± 0.0032	289679-89-6*0
Ethenedione anion		-149.5	-146.9	± 2.3	kJ/mol	56.0207 ± 0.0017	77783-15-4*0
Urea		-317.78	-333.38	± 0.12	kJ/mol	60.05534 ± 0.00091	57-13-6*500
Formamide			-251.03	± 0.29	kJ/mol	45.04066 ± 0.00088	75-12-7*500
Chloryl ion		1100.27	1097.61	± 0.53	kJ/mol	67.4510 ± 0.0011	25052-55-5*0
Acetamide			-315.89	± 0.54	kJ/mol	59.0672 ± 0.0017	60-35-5*500
Nitrosyl nitrite anion		-103.0	-106.2	± 2.8	kJ/mol	76.01223 ± 0.00091	122413-35-81
Nitric acid monohydrate		-479.18	-472.68	± 0.19	kJ/mol	81.0282 ± 0.0012	13444-82-1*500
Hydrogen chloride			-166.565	± 0.024	kJ/mol	36.46064 ± 0.00090	7647-01-0*839
1-Propynylium		1547.0	1545.1	± 3.1	kJ/mol	39.0554 ± 0.0024	24858-94-4*0
1-Propenylium		1232.0	1221.7	± 1.7	kJ/mol	41.0713 ± 0.0024	50457-58-4*2
Acrylonitrile		446.4	440.9	± 1.8	kJ/mol	53.0627 ± 0.0024	107-13-1*2
Acrylonitrile		146.27	153.93	± 0.78	kJ/mol	53.0627 ± 0.0024	107-13-1*500
1,3-Butadiynyl anion		677.4	686.5	± 1.1	kJ/mol	48.0433 ± 0.0032	59158-53-1*0
Isocyanoethene		544.1	539.2	± 1.8	kJ/mol	53.0627 ± 0.0024	14668-82-7*2
1-Propenylide		204.1	192.8	± 1.8	kJ/mol	41.0723 ± 0.0024	65887-20-9*2
1-Isocyanoethylidene		527.8	523.1	± 1.1	kJ/mol	53.0627 ± 0.0024	498544-34-60
Dioxohydrazine		172.92	171.15	± 0.14	kJ/mol	60.01228 ± 0.00062	16824-89-8*2
Acetonitrile			40.60	± 0.22	kJ/mol	41.0520 ± 0.0016	75-05-8*500
Hydrazoic acid cation		1333.68	1328.00	± 0.83	kJ/mol	43.02761 ± 0.00022	58852-14-5*0
Dioxohydrazine		172.92	171.15	± 0.14	kJ/mol	60.01228 ± 0.00062	16824-89-8*0
1-Ethenylium-1-yl		1507.0	1507.1	± 2.1	kJ/mol	26.0367 ± 0.0016	80541-07-7*0
Cyclopropylium		1104.6	1093.1	± 2.4	kJ/mol	41.0713 ± 0.0024	1724-43-2*0
NON anion		495.3	492.8	± 2.5	kJ/mol	44.01343 ± 0.00033	227934-47-60
Hydrogen fluoride			-321.47	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*832
Tetraoxygen		104.4	102.4	± 3.5	kJ/mol	63.9976 ± 0.0012	12596-83-7*11
Vinylacetylene			266.2	± 2.1	kJ/mol	52.0746 ± 0.0032	689-97-4*500
Nitric acid			-197.77	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*805
Perchloryl cation		1252.1	1246.4	± 2.5	kJ/mol	83.4504 ± 0.0013	23594-88-9*0
Hydrogen peroxide		-193.163	-187.346	± 0.079	kJ/mol	34.01468 ± 0.00062	7722-84-1*500
Isocyanogen iodide anion		123.0	125.2	± 9.3	kJ/mol	152.92246 ± 0.00080	66004-32-80
Vinylvinylidene		690.4	684.3	± 2.7	kJ/mol	52.0746 ± 0.0032	148759-16-4*11
Dioxymethylidyne cation		1388.2	1391.7	± 3.2	kJ/mol	44.00895 ± 0.00100	791121-04-5101
Oxygen difluoride cation		1292.12	1289.59	± 0.66	kJ/mol	53.99566 ± 0.00030	39432-25-2*0
Cycloprop-1-enylium		1502.2	1497.9	± 2.2	kJ/mol	39.0554 ± 0.0024	117067-78-4*0
2-Cyclopropyn-1-ylidenemethyliumyl		2239.6	2247.5	± 2.3	kJ/mol	48.0423 ± 0.0032	289679-92-1*0
1-Buten-3-ynylium		1483.0	1480.4	± 1.7	kJ/mol	51.0661 ± 0.0032	84654-85-3*2
Carbon dioxide cation		1335.0	1335.5	± 2.4	kJ/mol	44.00895 ± 0.00100	12181-61-2*1
Isocyanogen bromide		341.5	335.8	± 3.4	kJ/mol	105.9214 ± 0.0013	65997-98-0*0
Trihydrogen		756.931	754.146	± 0.015	kJ/mol	3.02382 ± 0.00021	12184-91-7*2
Chlorodioxidanyl		100.46	99.36	± 0.35	kJ/mol	67.4515 ± 0.0011	17376-09-9*0
Propenediylidene anion		588.8	590.0	± 2.3	kJ/mol	38.0485 ± 0.0024	161054-36-00
2-Cyclopropen-1-ylidenemethylium		1433.0	1429.2	± 1.9	kJ/mol	51.0661 ± 0.0032	112936-36-4*1
Hydroxyoxoammoniumyl		984.1	977.7	± 1.8	kJ/mol	47.01293 ± 0.00061	80371-48-8*1
1,3-Cyclobutadien-1-ylium		1472.9	1468.3	± 1.9	kJ/mol	51.0661 ± 0.0032	81913-77-1*1
1,3-Cyclobutadien-1-yl anion		616.3	611.8	± 2.2	kJ/mol	51.0672 ± 0.0032	154675-37-3*0
Cyclobutenylium		1037.3	1024.2	± 3.4	kJ/mol	53.0820 ± 0.0032	12316-90-4*0
2-Hydroxyethenyl		143.9	137.4	± 1.1	kJ/mol	43.0446 ± 0.0016	108665-16-3*11
Butyraldehyde		-235.97	-239.49	± 0.84	kJ/mol	72.1057 ± 0.0033	123-72-8*500
Propionic acid		-505.46	-509.60	± 0.18	kJ/mol	74.0785 ± 0.0025	79-09-4*500
2-Hydroxyethenyl		147.2	140.9	± 1.3	kJ/mol	43.0446 ± 0.0016	108665-16-3*22
2-Hydroxyethenyl		150.6	144.5	± 1.6	kJ/mol	43.0446 ± 0.0016	108665-16-3*12
Bromoniumyl		1098.07	1090.22	± 0.14	kJ/mol	80.9114 ± 0.0010	12258-64-9*0
Isocyanogen chloride		314.5	316.2	± 2.4	kJ/mol	61.4701 ± 0.0012	75754-69-7*0
2-Oxo-1-ethylium-1-yl		1289.4	1286.0	± 2.5	kJ/mol	42.0361 ± 0.0016	214464-96-7*11
Deuterium hydride		0.328	0.319	± 0.000	kJ/mol	3.022042 ± 0.000070	13983-20-5*0
Disilicon cation		1350.2	1353.8	± 2.8	kJ/mol	56.17045 ± 0.00060	12597-36-3*0
Dioxosilane cation		946.4	946.4	± 2.8	kJ/mol	60.08375 ± 0.00067	59458-81-0*0
Silicate		-477.3	-478.1	± 2.7	kJ/mol	60.08485 ± 0.00067	53095-83-3*0
Ethylene glycol		-448.72	-455.24	± 0.37	kJ/mol	62.0678 ± 0.0018	107-21-1*500
Tetraoxidanyl		53.0	46.0	± 5.1	kJ/mol	65.0055 ± 0.0012	69696-93-1*2
Oxosilicate		-105.8	-104.6	± 2.6	kJ/mol	44.08545 ± 0.00042	12503-59-2*0
Cyclobutane			3.93	± 0.40	kJ/mol	56.1063 ± 0.0032	287-23-0*590
Silicon carbide		-71.9	-72.9	± 1.5	kJ/mol	40.09620 ± 0.00085	409-21-2*502
Silane cation		1104.9	1097.7	± 1.7	kJ/mol	32.11671 ± 0.00041	34826-51-2*0
Hydrogen bromide			-120.20	± 0.15	kJ/mol	80.9119 ± 0.0010	10035-10-6*839
Silylium		989.6	984.0	± 1.2	kJ/mol	31.10877 ± 0.00037	41753-67-7*0
Dioxygen difluoride		75.1	71.6	± 3.6	kJ/mol	69.99561 ± 0.00060	183051-89-0*0
Silylidyne anion		248.6	249.8	± 1.2	kJ/mol	29.09399 ± 0.00031	68865-96-3*0
Ammonia anion		94.3	87.2	± 2.4	kJ/mol	17.03111 ± 0.00022	37353-00-7*0
Nitric acid			-186.85	± 0.18	kJ/mol	63.01288 ± 0.00091	7697-37-2*801
Peroxyhypochlorous acid cation		1030.3	1024.5	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-21
Oxalic acid		-819.57	-829.66	± 0.42	kJ/mol	90.0349 ± 0.0020	144-62-7*500
Trifluorine		80.6	81.9	± 2.6	kJ/mol	56.9952096 ± 0.0000015	73455-86-4*0
Dimethylamine			-43.43	± 0.37	kJ/mol	45.0837 ± 0.0017	124-40-3*500
Methylcyclopropane			1.84	± 0.59	kJ/mol	56.1063 ± 0.0032	594-11-6*590
Nitrous acid anion		-105.84	-110.46	± 0.78	kJ/mol	47.01403 ± 0.00061	256393-36-9*2
2,4-Hexadiyne		319.0	312.6	± 1.0	kJ/mol	78.1118 ± 0.0048	2809-69-0*500
Iodine monochloride		-36.511	-35.537	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*510
Carbon monoxide anion		30.0	33.7	± 2.3	kJ/mol	28.01065 ± 0.00085	12539-63-8*0
Trimethylenecyclopropane		454.1	441.2	± 1.8	kJ/mol	78.1118 ± 0.0048	3227-90-5*0
3,4-Bis(methylene)cyclobutene		355.4	340.8	± 1.8	kJ/mol	78.1118 ± 0.0048	5291-90-7*0
Trimethylamine			-48.85	± 0.87	kJ/mol	59.1103 ± 0.0025	75-50-3*500
Oxoethylidene anion		86.9	83.6	± 2.1	kJ/mol	42.0372 ± 0.0016	106543-38-8*1
1-Ethynylcyclobutene		402.1	387.8	± 1.8	kJ/mol	78.1118 ± 0.0048	813466-25-0*0
3-Methyl-1,2-pentadien-4-yne		414.5	403.3	± 2.3	kJ/mol	78.1118 ± 0.0048	813466-14-7*0
1,3-Pentadiyne			384.9	± 5.0	kJ/mol	64.0853 ± 0.0040	4911-55-1*500
Ethylamine			-74.09	± 0.55	kJ/mol	45.0837 ± 0.0017	75-04-7*500
1-Propanamine		-93.92	-101.52	± 0.41	kJ/mol	59.1103 ± 0.0025	107-10-8*500
2-Propanamine		-101.67	-112.28	± 0.52	kJ/mol	59.1103 ± 0.0025	75-31-0*500
Paraformaldehyde			-179.2	± 1.6	kJ/mol	30.02598 ± 0.00087	30525-89-4*500
Cyanogen anion		281.5	284.7	± 2.2	kJ/mol	52.0354 ± 0.0016	11118-88-0*0
Naphthalene		94.51	74.92	± 0.60	kJ/mol	128.1705 ± 0.0080	91-20-3*500
Diisocyanogen cation		1825.3	1828.1	± 3.2	kJ/mol	52.0343 ± 0.0016	78800-21-21
Biphenyl		121.5	97.1	± 1.1	kJ/mol	154.2078 ± 0.0096	92-52-4*500
Biphenyl		121.5	97.1	± 1.1	kJ/mol	154.2078 ± 0.0096	92-52-4*520
Isocyanic fluoride		301.3	303.1	± 1.7	kJ/mol	45.01584 ± 0.00080	16992-26-0*0
Benzoic acid		-367.38	-384.80	± 0.17	kJ/mol	122.1213 ± 0.0056	65-85-0*500
Helium hydride cation		1350.148	1348.258	± 0.000	kJ/mol	5.009993 ± 0.000070	17009-49-3*0
Xenon hydride cation		1038.04	1036.26	± 0.89	kJ/mol	132.2974 ± 0.0200	37276-91-8*0
Carbon suboxide		-131.7	-116.6	± 1.3	kJ/mol	68.0309 ± 0.0025	504-64-3*500
Peroxyformate		-320.6	-326.5	± 1.8	kJ/mol	61.0174 ± 0.0012	104960-05-6*2
Tribromide			-129.17	± 0.25	kJ/mol	239.7125 ± 0.0030	14522-80-6*800
Peroxyformyl		-90.4	-95.8	± 1.8	kJ/mol	61.0168 ± 0.0012	56240-83-6*2
Oxygen atom tetracation		17719.207	17721.064	± 0.025	kJ/mol	15.99721 ± 0.00030	14127-65-2*0
Methylaminyliumyl		1388.3	1381.9	± 2.3	kJ/mol	29.04071 ± 0.00083	56924-51-7*1
Hydrazoic acid			272.64	± 0.48	kJ/mol	43.02816 ± 0.00022	7782-79-8*800
m-Benzyne		614.6	605.2	± 1.4	kJ/mol	76.0960 ± 0.0048	1828-89-3*1
1-Propen-1-yl-3-ylidene		656.6	653.2	± 1.1	kJ/mol	39.0559 ± 0.0024	84654-90-0*1
Oxygen atom heptacation		113369.48	113371.34	± 0.12	kJ/mol	15.99556 ± 0.00030	14274-89-6*0
Hydrogen iodide			-56.823	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*800
1-Hydroxyethyl		-42.79	-56.22	± 0.57	kJ/mol	45.0605 ± 0.0017	2348-46-1*0
Tetraoxodinitrate anion		-184.6	-187.8	± 2.4	kJ/mol	92.0116 ± 0.0012	63552-02-3*0
Formylimidogen		245.3	242.0	± 3.3	kJ/mol	43.02478 ± 0.00086	42288-92-6*2
Tropylide		261.1	244.7	± 2.0	kJ/mol	91.1310 ± 0.0056	34464-18-1*0
Hydrogen fluoride			-321.15	± 0.16	kJ/mol	20.006343 ± 0.000070	7664-39-3*906
sec-Butylium		792.9	769.3	± 1.7	kJ/mol	57.1137 ± 0.0033	16548-59-7*0
Water		-286.298	-292.739	± 0.026	kJ/mol	18.01528 ± 0.00033	7732-18-5*510
Nitrosyl nitrate		60.4	52.5	± 1.9	kJ/mol	92.0111 ± 0.0012	15969-55-8*2
mu-Oxodichlorine cation		1130.44	1126.84	± 0.63	kJ/mol	86.9043 ± 0.0018	51174-96-0*0
Tetrabromomethane			49.3	± 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
Hydrazoic acid anion		316.2	310.1	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*2
mu-Oxodichlorate anion		-147.8	-147.7	± 2.5	kJ/mol	86.9053 ± 0.0018	365546-30-1*0
Bromomethane		-55.93	-58.94	± 0.27	kJ/mol	94.9385 ± 0.0013	74-83-9*590
Trioxirane cation		1444.5	1442.3	± 2.2	kJ/mol	47.99765 ± 0.00090	153851-84-40
Hydrazine monohydrate			-242.66	± 0.19	kJ/mol	50.06052 ± 0.00053	7803-57-8*500
Water		-238.929	-241.832	± 0.026	kJ/mol	18.01528 ± 0.00033	7732-18-5*2
Difluorodioxidanium		1287.2	1283.0	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-02
Acetic acid			-484.87	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*833
Acetic acid			-484.92	± 0.23	kJ/mol	60.0520 ± 0.0017	64-19-7*850
Fluorine atom		77.258	79.043	± 0.047	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*1
Nitrogen atom		470.579	472.442	± 0.024	kJ/mol	14.006740 ± 0.000070	17778-88-0*1
Hydrazoic acid			257.65	± 0.48	kJ/mol	43.02816 ± 0.00022	7782-79-8*1000
Hydroxymethylene		112.68	108.92	± 0.27	kJ/mol	30.02598 ± 0.00087	19710-56-6*0
Iodine monochloride			-24.048	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*590
Cyclopentadiene			109.91	± 0.59	kJ/mol	66.1011 ± 0.0040	542-92-7*590
Succinic acid		-918.56	-940.28	± 0.13	kJ/mol	118.0880 ± 0.0034	110-15-6*500
Methyl acetate		-394.22	-413.09	± 0.60	kJ/mol	74.0785 ± 0.0025	79-20-9*0
Methylene		391.060	391.617	± 0.097	kJ/mol	14.02658 ± 0.00081	2465-56-7*0
Peroxyhypochlorous acid anion		-2.9	-3.3	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-31
1,2-Dibromoethane			-80.2	± 1.2	kJ/mol	187.8612 ± 0.0026	106-93-4*500
2-Chloro ozone		266.0	265.4	± 3.7	kJ/mol	83.4509 ± 0.0013	141801-66-30
Dioxofluorine anion		155.9	154.4	± 2.5	kJ/mol	50.99775 ± 0.00060	175861-93-50
Trihydrogen cation		1110.304	1106.697	± 0.013	kJ/mol	3.02327 ± 0.00021	28132-48-1*2
1,3-Butadien-2-ol		-43.1	-59.6	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*21
1,3-Butadien-2-ol		-53.8	-69.1	± 1.6	kJ/mol	70.0898 ± 0.0032	59120-04-6*1
Diatomic bromine cation		1060.32	1045.37	± 0.23	kJ/mol	159.8075 ± 0.0020	12595-71-0*0
Acrolein		-55.3	-65.4	± 1.2	kJ/mol	56.0633 ± 0.0024	107-02-8*0
1,2-Propadien-1-one cation		1012.6	1011.2	± 1.9	kJ/mol	54.0468 ± 0.0024	87612-93-9*0
1-Methylethenylium		995.3	986.1	± 2.0	kJ/mol	41.0713 ± 0.0024	50457-57-3*0
2-Propynal cation		1168.3	1167.2	± 1.6	kJ/mol	54.0468 ± 0.0024	100815-70-1*0
Formaldehyde			-171.19	± 0.59	kJ/mol	30.02598 ± 0.00087	50-00-0*800
Dihydrogen anion		253.8	254.7	± 1.2	kJ/mol	2.01643 ± 0.00014	12184-89-3*0
Hydrogen peroxide cation		930.99	924.13	± 0.98	kJ/mol	34.01413 ± 0.00062	12325-10-9*22
Bicyclo[1.1.0]buta-1,3-diene-2,4-diyl		1047.19	1054.78	± 0.69	kJ/mol	48.0428 ± 0.0032	12184-80-4*2
1-Methylethenyl anion		199.4	188.3	± 2.0	kJ/mol	41.0723 ± 0.0024	65887-19-6*0
2-Hydroxyethylium		1024.5	1011.9	± 2.0	kJ/mol	45.0600 ± 0.0017	38607-31-7*1
(Hydroxyimino)methyl		258.8	252.7	± 2.0	kJ/mol	44.03272 ± 0.00087	206442-92-4*2
Hydrogen peroxide cation		897.23	890.25	± 0.51	kJ/mol	34.01413 ± 0.00062	12325-10-9*11
Ammonium hydroxide			-366.712	± 0.061	kJ/mol	35.04584 ± 0.00047	1336-21-6*1000
Cyanoacetylene cation		1495.43	1497.73	± 0.62	kJ/mol	51.0462 ± 0.0024	85398-68-1*0
Isocyanoacetylene cation		1567.7	1570.3	± 1.3	kJ/mol	51.0462 ± 0.0024	145076-03-5*0
1,3-Butadiyn-4-ylium-1-yl		2110.0	2120.6	± 2.8	kJ/mol	48.0423 ± 0.0032	124708-46-9*0
Cyanoethynylium		1867.6	1874.3	± 3.2	kJ/mol	50.0383 ± 0.0024	104233-69-4*0
Tetroxidane		-34.1	-44.6	± 2.3	kJ/mol	66.0135 ± 0.0012	29683-94-1*0
1,3-Butadiyne-1,4-diyl		1052.40	1062.37	± 0.66	kJ/mol	48.0428 ± 0.0032	78015-07-3*1
Ethynylene		820.33	826.90	± 0.26	kJ/mol	24.0214 ± 0.0016	12070-15-4*2
Trioxygen difluoride		112.3	107.1	± 1.1	kJ/mol	85.99501 ± 0.00090	16829-28-0*0
Methyl formate		-346.88	-359.92	± 0.84	kJ/mol	60.0520 ± 0.0017	107-31-3*0
3-Imino-2-propen-1-ylidene		530.6	526.3	± 1.2	kJ/mol	53.0627 ± 0.0024	916765-05-4*1
1-Propenylium		1233.9	1223.4	± 2.0	kJ/mol	41.0713 ± 0.0024	50457-58-4*1
Ethyl formate		-375.3	-394.0	± 1.2	kJ/mol	74.0785 ± 0.0025	109-94-4*0
2-(Methylidyneamino)ethenyl		600.6	596.3	± 1.2	kJ/mol	53.0627 ± 0.0024	123416-74-0*1
1-Propenylide		210.6	199.4	± 2.1	kJ/mol	41.0723 ± 0.0024	65887-20-9*1
Hydroxylamine		-33.12	-43.49	± 0.45	kJ/mol	33.02996 ± 0.00037	7803-49-8*0
Trihydrogen		215.9	218.3	± 1.1	kJ/mol	3.02382 ± 0.00021	12184-91-7*100
Oxygen atom dication		4949.459	4953.000	± 0.013	kJ/mol	15.99830 ± 0.00030	14127-63-0*0
2-Butynylium		1258.6	1251.3	± 2.1	kJ/mol	53.0820 ± 0.0032	64235-83-2*1
iso-Hexane		-180.33	-203.99	± 0.83	kJ/mol	86.1754 ± 0.0049	107-83-5*500
Acetaldehyde		-187.04	-191.76	± 0.31	kJ/mol	44.0526 ± 0.0017	75-07-0*500
Tetraoxygen		69.8	65.1	± 4.4	kJ/mol	63.9976 ± 0.0012	12596-83-7*21
Hypochloroperoxoous acid, hydroxy ester		49.5	42.5	± 2.5	kJ/mol	84.4588 ± 0.0013	928652-99-7*2
Tetraoxygen		399.0	393.4	± 3.9	kJ/mol	63.9976 ± 0.0012	12596-83-7*23
Tetraoxygen		465.6	459.6	± 4.2	kJ/mol	63.9976 ± 0.0012	12596-83-7*24
2-Propen-1-ylium-1-ylidene		1373.1	1369.5	± 2.0	kJ/mol	39.0554 ± 0.0024	88000-25-3*0
Acetoxy		-182.5	-191.3	± 1.2	kJ/mol	59.0440 ± 0.0017	13799-69-4*1
Nitrosyl nitrite anion		-100.2	-103.4	± 2.9	kJ/mol	76.01223 ± 0.00091	122413-35-82
Deuteride		146.991	148.904	± 0.0021	kJ/mol	2.01465035791 ± 0.00000000040	14452-69-8*0
Acetoxy		-182.5	-191.2	± 1.2	kJ/mol	59.0440 ± 0.0017	13799-69-4*0
Hydrogen peroxide		-129.472	-135.458	± 0.063	kJ/mol	34.01468 ± 0.00062	7722-84-1*2
1,2-Butadien-1-ylium-1-yl		1466.8	1461.7	± 3.2	kJ/mol	52.0740 ± 0.0032	161054-21-3*0
Ethyl bromide		-55.52	-91.05	± 0.26	kJ/mol	108.9651 ± 0.0019	74-96-4*500
Bicyclo[1.1.0]butan-3-id-1-yl		524.6	515.9	± 2.7	kJ/mol	52.0751 ± 0.0032	131273-95-5*0
1,2-Cyclobutadiene		586.0	579.4	± 2.3	kJ/mol	52.0746 ± 0.0032	50682-90-1*0
Dioxaziridine		277.5	270.8	± 1.9	kJ/mol	47.01348 ± 0.00061	67394-35-8*0
Vinyl iodide		139.6	130.8	± 1.2	kJ/mol	153.9497 ± 0.0016	593-66-8*0
Acetylene anion		356.8	356.7	± 1.9	kJ/mol	26.0378 ± 0.0016	50443-89-5*0
1,2-Propadien-1-ylium-1-yl-3-ylidene		1944.8	1952.7	± 1.9	kJ/mol	36.0316 ± 0.0024	118090-85-0*0
Propionic acid		-436.35	-454.24	± 0.60	kJ/mol	74.0785 ± 0.0025	79-09-4*0
Oxygen atom trication		10249.929	10252.880	± 0.018	kJ/mol	15.99775 ± 0.00030	14127-64-1*0
Difluorovinylidene cation		1181.6	1183.0	± 2.3	kJ/mol	62.0177 ± 0.0016	268566-71-8*0
Trihydrogen		745.878	743.094	± 0.062	kJ/mol	3.02382 ± 0.00021	12184-91-7*1
Deuterium molecule cation		1492.286	1492.361	± 0.000	kJ/mol	4.02765497609 ± 0.00000000080	12184-84-8*0
Chlorine atom		119.621	121.228	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*1
Trioxodinitrate anion		-87.3	-93.0	± 2.2	kJ/mol	76.01223 ± 0.00091	194856-62-7*1
Isocyanogen bromide anion		105.3	102.1	± 4.6	kJ/mol	105.9220 ± 0.0013	238754-53-50
Oxoniumyl ion		978.470	975.566	± 0.028	kJ/mol	18.01473 ± 0.00033	56583-62-1*1
Dioxosilane		-900.3	-905.1	± 1.5	kJ/mol	60.08430 ± 0.00067	7631-86-9*515
Bromodioxy		118.2	109.1	± 4.3	kJ/mol	111.9028 ± 0.0012	67177-47-3*0
Oxosilyliumyl		1022.2	1023.4	± 3.0	kJ/mol	44.08435 ± 0.00042	12359-18-1*0
Propylene cation		975.17	961.64	± 0.19	kJ/mol	42.0792 ± 0.0024	34504-10-4*0
Oxonium		605.85	599.10	± 0.17	kJ/mol	19.02267 ± 0.00037	13968-08-6*2
Hydroxyoxoammoniumyl		1014.8	1008.4	± 2.0	kJ/mol	47.01293 ± 0.00061	80371-48-8*2
Water trimer		-762.72	-776.82	± 0.20	kJ/mol	54.04584 ± 0.00099	31014-12-7*0
Nitrous acid anion		-105.4	-109.4	± 1.8	kJ/mol	47.01403 ± 0.00061	256393-36-9*1
Cyclopropane cation		1022.3	1006.8	± 1.6	kJ/mol	42.0792 ± 0.0024	34496-93-0*0
Silyloxoniumylidene		1096.2	1089.9	± 2.9	kJ/mol	47.10817 ± 0.00047	152720-17-7*1
Chlorodioxidenium		1215.1	1212.9	± 6.3	kJ/mol	67.4510 ± 0.0011	64710-10-7*0
Hydroxysilylium		600.2	591.5	± 2.9	kJ/mol	47.10817 ± 0.00047	66639-72-3*0
Fluorosyl fluoride		227.	225.	± 21.	kJ/mol	53.99621 ± 0.00030	86825-57-2*2
Difluorine cation		1514.301	1514.475	± 0.013	kJ/mol	37.9962578 ± 0.0000010	12184-86-0*0
Chloro(chlorooxy)methylene		101.1	104.7	± 4.8	kJ/mol	98.9155 ± 0.0020	479587-31-0*12
1,5-Hexadiyne			385.8	± 1.9	kJ/mol	78.1118 ± 0.0048	628-16-0*500
Oxygen atom octacation		197447.75	197449.60	± 0.12	kJ/mol	15.99501 ± 0.00030	21450-98-6*0
Iodine		198.109	197.709	± 0.0021	kJ/mol	126.904470 ± 0.000030	14362-44-8*2
Dioxofluorine cation		1667.0	1664.8	± 2.8	kJ/mol	50.99665 ± 0.00060	223566-05-0*0
Acetylene		599.1	598.9	± 1.5	kJ/mol	26.0373 ± 0.0016	74-86-2*11
2-Oxo-1-ethylium-1-yl		1292.0	1288.6	± 2.4	kJ/mol	42.0361 ± 0.0016	214464-96-7*12
Bicyclo[3.1.0]hexa-1,3-diene		406.3	390.7	± 2.3	kJ/mol	78.1118 ± 0.0048	28425-23-2*0
3-Ethenylidenecyclobutene		406.4	392.3	± 2.3	kJ/mol	78.1118 ± 0.0048	813466-23-8*0
3,4-Hexadien-1-yne		418.5	407.3	± 2.6	kJ/mol	78.1118 ± 0.0048	194024-51-6*0
3-Ethynylcyclobutene		421.6	407.2	± 2.4	kJ/mol	78.1118 ± 0.0048	175090-90-1*0
Dinitrogen dimer		-0.88	0.84	± 0.67	kJ/mol	56.02696 ± 0.00028	154680-01-0*0
Polyoxymethylene			-170.88	± 0.21	kJ/mol	30.02598 ± 0.00087	9002-81-7*500
Oxoethylidene anion		92.3	89.0	± 2.3	kJ/mol	42.0372 ± 0.0016	106543-38-8*2
Hydroxylamine			-107.50	± 0.62	kJ/mol	33.02996 ± 0.00037	7803-49-8*500
Peroxyhypochlorous acid cation		1050.8	1045.2	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-22
Oxygen atom pentacation		28708.788	28710.646	± 0.053	kJ/mol	15.99666 ± 0.00030	14127-66-3*0
Tribromine cation		1035.9	1013.2	± 2.6	kJ/mol	239.7115 ± 0.0030	33105-86-1*0
Dihydrogen cation		1488.364	1488.480	± 0.000	kJ/mol	2.01533 ± 0.00014	12184-90-6*2
1,2-Diphenylethane		180.56	142.07	± 0.76	kJ/mol	182.2610 ± 0.0112	103-29-7*0
Isocyanogen cation		1654.1	1656.5	± 1.4	kJ/mol	52.0343 ± 0.0016	133415-63-1*0
Chlorine trifluoride cation		1053.4	1049.1	± 2.4	kJ/mol	92.44736 ± 0.00090	478167-77-0*0
Carbon monoxide		-113.804	-110.524	± 0.026	kJ/mol	28.01010 ± 0.00085	630-08-0*2
Biphenyl			113.7	± 1.1	kJ/mol	154.2078 ± 0.0096	92-52-4*590
Buckminsterfullerene		2524.3	2519.6	± 6.5	kJ/mol	720.6420 ± 0.0480	99685-96-8*0
Buckminsterfullerene		2329.2	2338.6	± 6.5	kJ/mol	720.6420 ± 0.0480	99685-96-8*500
Diisocyanogen cation		1838.6	1842.5	± 3.1	kJ/mol	52.0343 ± 0.0016	78800-21-22
Cyclobutatrienyl		961.9	965.4	± 2.4	kJ/mol	49.0507 ± 0.0032	99417-52-40
Dihydrogen		-0.000	-0.058	± 0.000	kJ/mol	2.01588 ± 0.00014	1333-74-0*2
1-Propen-1-yl-3-ylidene		656.6	653.2	± 1.1	kJ/mol	39.0559 ± 0.0024	84654-90-0*0
1,2-Butadiene		137.67	138.73	± 0.66	kJ/mol	54.0904 ± 0.0032	590-19-2*500
2-Cyclopropen-1-one cation		1078.6	1075.5	± 2.0	kJ/mol	54.0468 ± 0.0024	100815-68-7*0
Phenol cation		746.10	727.30	± 0.64	kJ/mol	94.1107 ± 0.0048	40932-22-7*0
Ethynol		464.2	460.9	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*15
Water		-286.300	-292.741	± 0.026	kJ/mol	18.01528 ± 0.00033	7732-18-5*509
Oxonium		605.91	599.10	± 0.17	kJ/mol	19.02267 ± 0.00037	13968-08-6*1
Phenol anion		22.7	7.8	± 4.9	kJ/mol	94.1118 ± 0.0048	38752-11-3*0
Isourea		-156.2	-172.8	± 2.6	kJ/mol	60.05534 ± 0.00091	4744-36-9*0
Hydroxyformyl		-181.14	-183.68	± 0.44	kJ/mol	45.0174 ± 0.0010	2564-86-5*0
Perchloric acid cation		1191.8	1182.2	± 3.5	kJ/mol	100.4577 ± 0.0015	91712-47-9*0
Carbamoyl anion		-81.9	-87.8	± 3.1	kJ/mol	44.03327 ± 0.00087	78944-69-1*0
Hydroxyformyl anion		-319.53	-321.39	± 0.57	kJ/mol	45.0180 ± 0.0010	78944-70-4*0
Carbamoyl		74.1	68.3	± 2.7	kJ/mol	44.03272 ± 0.00087	2858-51-70
Carbamoyl		76.4	69.9	± 3.2	kJ/mol	44.03272 ± 0.00087	2858-51-72
Carbamoyl		96.3	90.1	± 3.2	kJ/mol	44.03272 ± 0.00087	2858-51-73
Carbamoyl		110.9	104.8	± 3.2	kJ/mol	44.03272 ± 0.00087	2858-51-74
2-Hydroxyethylium		1019.1	1007.0	± 1.5	kJ/mol	45.0600 ± 0.0017	38607-31-7*0
Water dimer cation		556.8	546.4	± 3.0	kJ/mol	36.03001 ± 0.00066	158061-35-9*0
Peroxychlorous acid		96.2	90.6	± 2.1	kJ/mol	84.4588 ± 0.0013	177778-92-6*0
Nitrosodioxaziridine		413.9	408.1	± 3.2	kJ/mol	76.01168 ± 0.00091	132871-99-9*2
(Hydroxyimino)methyl		262.5	257.1	± 2.5	kJ/mol	44.03272 ± 0.00087	206442-92-4*3
(Hydroxyimino)methyl		281.4	275.9	± 2.5	kJ/mol	44.03272 ± 0.00087	206442-92-4*4
Hydrogen peroxide cation		897.26	890.25	± 0.51	kJ/mol	34.01413 ± 0.00062	12325-10-9*12
Dichloromethylene		229.51	230.69	± 0.64	kJ/mol	82.9161 ± 0.0020	1605-72-7*0
Hydroperoxyimidogen		111.9	109.0	± 2.8	kJ/mol	47.01348 ± 0.00061	877456-58-1*2
Dichlorovinylidene		421.7	424.9	± 3.0	kJ/mol	94.9268 ± 0.0024	20394-25-6*0
Tetraoxidanyl		76.7	69.5	± 6.1	kJ/mol	65.0055 ± 0.0012	69696-93-1*1
Dioxymethylene		341.8	339.8	± 3.0	kJ/mol	45.0174 ± 0.0010	438586-67-5*0
Formaldoxime		30.5	19.9	± 1.3	kJ/mol	45.04066 ± 0.00088	75-17-2*0
2-Oxo-1-ethylium-1-yl		1289.4	1286.7	± 2.5	kJ/mol	42.0361 ± 0.0016	214464-96-7*1
1-Methoxyethenol		-284.9	-303.3	± 1.7	kJ/mol	74.0785 ± 0.0025	4453-91-2*0
Chlorovinylidene		428.0	429.8	± 3.0	kJ/mol	60.4820 ± 0.0018	70277-82-6*0
Benzaldehyde cation		896.9	880.2	± 1.9	kJ/mol	106.1214 ± 0.0056	80226-59-1*0
Bromine atom		162.002	155.939	± 0.056	kJ/mol	79.90400 ± 0.00100	10097-32-2*2
Benzaldehyde anion		-60.2	-77.8	± 1.2	kJ/mol	106.1225 ± 0.0056	34473-57-9*0
Bicyclo[1.1.0]buta-1,3-diene-2,4-diyl		1133.1	1140.9	± 2.7	kJ/mol	48.0428 ± 0.0032	12184-80-4*1
Hydrogen peroxide cation		897.23	890.25	± 0.51	kJ/mol	34.01413 ± 0.00062	12325-10-9*0
Trihydrogen		477.4	474.7	± 2.3	kJ/mol	3.02382 ± 0.00021	12184-91-7*201
Cyanogen chloride cation		1326.05	1327.38	± 0.97	kJ/mol	61.4696 ± 0.0012	37612-72-9*0
2-Cyclopropyn-1-ylidene		898.9	905.8	± 1.6	kJ/mol	36.0321 ± 0.0024	102508-15-6*0
1-Propen-1-yl-3-ylidene		665.7	662.2	± 2.0	kJ/mol	39.0559 ± 0.0024	84654-90-0*13
Ethynol anion		163.5	165.0	± 3.3	kJ/mol	42.0372 ± 0.0016	864971-50-6*0
Iodine monochloride		-36.511	-35.537	± 0.063	kJ/mol	162.35717 ± 0.00090	7790-99-0*500
Ethylene anion		232.0	225.5	± 2.0	kJ/mol	28.0537 ± 0.0016	34527-91-8*0
Nitrogen atom		700.555	702.458	± 0.024	kJ/mol	14.006740 ± 0.000070	17778-88-0*2
Oxirene		273.18	271.02	± 0.92	kJ/mol	42.0367 ± 0.0016	157-18-6*0
Peroxychlorous acid		102.3	96.2	± 3.7	kJ/mol	84.4588 ± 0.0013	177778-92-6*3
3H-diazirin-3-ylidene-methylene		837.3	839.9	± 2.3	kJ/mol	52.0349 ± 0.0016	204253-88-3*0
Ethane anion		41.9	26.6	± 4.4	kJ/mol	30.0696 ± 0.0017	54064-82-3*0
1-Cyanoethylidene		437.5	433.7	± 1.5	kJ/mol	53.0627 ± 0.0024	498544-34-6*0
Difluorodioxidanium		1283.7	1280.0	± 2.3	kJ/mol	69.99506 ± 0.00060	7783-44-00
Nitrosodioxaziridine		415.3	409.5	± 2.8	kJ/mol	76.01168 ± 0.00091	132871-99-9*3
Cyanic acid cation		1135.7	1133.2	± 2.9	kJ/mol	43.02423 ± 0.00086	59780-31-3*0
Diazene		207.12	199.98	± 0.41	kJ/mol	30.02936 ± 0.00020	3618-05-1*1
Ethynol		406.4	403.2	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*12
Hydrazoic acid			261.51	± 0.65	kJ/mol	43.02816 ± 0.00022	7782-79-8*500
Difluorodioxidane anion		-251.	-251.	± 28.	kJ/mol	69.99615 ± 0.00060	7783-45-10
3-Imino-2-propen-1-ylidene		530.6	526.3	± 1.2	kJ/mol	53.0627 ± 0.0024	916765-05-4*0
Hydrogen cyanide anion		129.513	129.035	± 0.089	kJ/mol	27.02593 ± 0.00081	12334-27-9*0
3-Imino-2-propen-1-ylidene		571.8	567.0	± 1.6	kJ/mol	53.0627 ± 0.0024	916765-05-4*2
1-Propen-1-yl-3-ylidene		699.2	696.2	± 3.4	kJ/mol	39.0559 ± 0.0024	84654-90-0*2
Water		-238.644	-241.832	± 0.026	kJ/mol	18.01528 ± 0.00033	7732-18-5*1
Dichlorine cation		1108.307	1108.286	± 0.0062	kJ/mol	70.9049 ± 0.0018	12595-90-3*0
Fluoromethane cation		981.80	974.30	± 0.62	kJ/mol	34.03237 ± 0.00083	59122-96-2*0
2-(Methylidyneamino)ethenyl		600.6	596.3	± 1.2	kJ/mol	53.0627 ± 0.0024	123416-74-0*0
Fluorosyl fluoride anion		-147.1	-146.8	± 3.0	kJ/mol	53.99675 ± 0.00030	86825-57-20
2-(Methylidyneamino)ethenyl		634.5	630.4	± 1.6	kJ/mol	53.0627 ± 0.0024	123416-74-0*2
Cyanogen iodide cation		1271.4	1271.2	± 1.6	kJ/mol	152.92136 ± 0.00080	34749-78-5*0
Carbon		2.390	1.862	± 0.044	kJ/mol	12.01070 ± 0.00080	7440-44-0*501
Fluoromethane			-245.76	± 0.45	kJ/mol	34.03292 ± 0.00083	593-53-3*590
Diazene anion		265.5	258.7	± 2.0	kJ/mol	30.02991 ± 0.00020	100429-75-2*0
Diazoethenylidene cation		1771.2	1773.2	± 3.5	kJ/mol	52.0343 ± 0.0016	130760-10-00
Dioxohydrazine		192.3	188.7	± 1.8	kJ/mol	60.01228 ± 0.00062	16824-89-8*1
Trihydrogen		254.5	250.7	± 1.2	kJ/mol	3.02382 ± 0.00021	12184-91-7*200
Imidogen		358.74	358.79	± 0.16	kJ/mol	15.014680 ± 0.000099	13774-92-0*1
Dicarbon monoxide		377.12	381.16	± 0.83	kJ/mol	40.0208 ± 0.0016	12071-23-7*0
1-Methylethylidene		315.91	303.01	± 0.99	kJ/mol	42.0797 ± 0.0024	40852-89-9*0
Diazene anion		265.5	258.7	± 2.0	kJ/mol	30.02991 ± 0.00020	100429-75-2*1
Carbonylmethyloxonium		561.3	553.1	± 3.2	kJ/mol	59.0435 ± 0.0017	24434-00-2*0
Chloromethane		-106.10	-102.14	± 0.25	kJ/mol	50.4872 ± 0.0012	74-87-3*590
2-Cyanovinyl		448.0	445.5	± 1.2	kJ/mol	52.0547 ± 0.0024	189141-20-6*0
2-Cyanovinylium		1517.2	1515.1	± 1.8	kJ/mol	52.0542 ± 0.0024	85398-67-0*2
2-Cyanovinyl anion		263.8	261.4	± 1.8	kJ/mol	52.0553 ± 0.0024	85398-67-00
Methoxyoxomethyl		-152.6	-160.3	± 1.5	kJ/mol	59.0440 ± 0.0017	16481-04-2*0
mu-Oxodioxodinitrogen		984.0	981.1	± 3.2	kJ/mol	76.01113 ± 0.00091	87950-63-8*1
2-Isocyanovinyl		543.2	541.8	± 1.7	kJ/mol	52.0547 ± 0.0024	225798-14-1*0
Propylidene anion		300.8	286.6	± 3.2	kJ/mol	42.0803 ± 0.0024	121408-55-70
Fluorosyl fluoride cation		1413.1	1413.5	± 3.5	kJ/mol	53.99566 ± 0.00030	86825-50-50
Cyanomethyliumyl		1506.7	1508.2	± 2.3	kJ/mol	39.0355 ± 0.0016	34447-38-6*0
Cyanomethylene anion		286.6	287.1	± 1.5	kJ/mol	39.0366 ± 0.0016	12373-24-9*0
Cyanomethylene		479.9	483.3	± 1.1	kJ/mol	39.0361 ± 0.0016	2612-62-6*0
1,3-Butadiyne-1,4-diyl		1084.14	1093.95	± 0.84	kJ/mol	48.0428 ± 0.0032	78015-07-3*2
Methoxyoxomethyl		-151.9	-160.9	± 2.2	kJ/mol	59.0440 ± 0.0017	16481-04-2*2
Isocyanomethyliumyl		1505.9	1507.8	± 3.3	kJ/mol	39.0355 ± 0.0016	99045-54-2*0
Isocyanomethylene anion		400.6	401.3	± 2.1	kJ/mol	39.0366 ± 0.0016	144141-01-5*0
Isocyanomethylene		582.3	584.6	± 1.7	kJ/mol	39.0361 ± 0.0016	78694-65-2*0
Bromomethane cation		996.91	981.99	± 0.27	kJ/mol	94.9380 ± 0.0013	12538-70-4*0
3-Oxo-1,2-propadien-1-ylium-1-yl		1379.9	1385.2	± 3.9	kJ/mol	52.0310 ± 0.0024	151455-13-9*0
3-Oxo-1,2-propadienylidene anion		223.9	229.7	± 3.6	kJ/mol	52.0320 ± 0.0024	109292-50-4*0
Pentachloroethylium		836.2	834.5	± 3.3	kJ/mol	201.2844 ± 0.0048	7094-17-90
Nitrosyl nitrate		48.3	40.4	± 1.8	kJ/mol	92.0111 ± 0.0012	15969-55-8*0
Methoxyoxomethyl		-151.7	-159.8	± 2.2	kJ/mol	59.0440 ± 0.0017	16481-04-2*3
Cyanic acid anion		-9.2	-9.6	± 3.1	kJ/mol	43.02533 ± 0.00086	58199-47-6*0
Hydrogen isocyanide anion		191.60	191.79	± 0.33	kJ/mol	27.02593 ± 0.00081	96913-22-3*0
Diazanide		249.3	239.3	± 3.1	kJ/mol	31.03785 ± 0.00025	25415-88-7*0
Propylidyne		492.5	482.8	± 1.2	kJ/mol	41.0718 ± 0.0024	85056-54-8*0
Pentachloroethanide		-283.7	-282.2	± 3.9	kJ/mol	201.2854 ± 0.0048	263019-83-6*0
O--HH Complex		247.2	248.2	± 2.0	kJ/mol	18.01528 ± 0.00033	7732-18-5102
Fluorosyl fluoride		192.8	193.3	± 2.3	kJ/mol	53.99621 ± 0.00030	86825-57-2*0
Oxoethylidene anion		86.9	84.2	± 2.1	kJ/mol	42.0372 ± 0.0016	106543-38-8*0
Nitrosodioxaziridine		413.7	408.2	± 1.8	kJ/mol	76.01168 ± 0.00091	132871-99-9*0
1,3-Cyclobutadiene cation		1215.5	1207.2	± 3.1	kJ/mol	52.0740 ± 0.0032	34531-09-4*0
Acetyloxoniumylidene		891.9	883.5	± 3.0	kJ/mol	59.0435 ± 0.0017	67057-47-0*1
Formic acid cation		721.89	715.36	± 0.26	kJ/mol	46.0248 ± 0.0010	50614-05-6*0
2-Methyl-2-cyclopropen-1-ylidene		447.9	441.7	± 1.2	kJ/mol	52.0746 ± 0.0032	185841-59-2*0
2-Methyl-2-cyclopropen-1-ylidene		670.5	664.5	± 2.8	kJ/mol	52.0746 ± 0.0032	185841-59-2*1
Ethynol		95.31	92.82	± 0.80	kJ/mol	42.0367 ± 0.0016	32038-79-2*0
Iodomethane cation		944.80	935.40	± 0.18	kJ/mol	141.93844 ± 0.00083	12538-72-6*0
Hydroperoxonium		762.5	752.7	± 2.0	kJ/mol	35.02207 ± 0.00064	70850-26-9*2
Isocyanomethane			146.5	± 2.2	kJ/mol	41.0520 ± 0.0016	593-75-9*500
Peroxyformic acid		-279.24	-288.38	± 0.88	kJ/mol	62.0248 ± 0.0012	107-32-4*0
Diazene cation		1132.49	1125.55	± 0.64	kJ/mol	30.02881 ± 0.00020	76986-17-9*1
Vinylvinylidene		494.1	488.7	± 1.8	kJ/mol	52.0746 ± 0.0032	148759-16-4*0
Vinylvinylidene		690.4	684.6	± 2.7	kJ/mol	52.0746 ± 0.0032	148759-16-4*1
Ethylidene		361.20	354.22	± 0.51	kJ/mol	28.0532 ± 0.0016	4218-50-2*0
Vinylvinylidene		695.4	688.9	± 3.3	kJ/mol	52.0746 ± 0.0032	148759-16-4*12
Vinylvinylidene cation		1429.7	1424.4	± 2.1	kJ/mol	52.0740 ± 0.0032	161054-20-2*0
Vinylvinylidene cation		1437.7	1432.0	± 2.7	kJ/mol	52.0740 ± 0.0032	161054-20-2*2
Vinylvinylidene anion		405.7	398.9	± 2.1	kJ/mol	52.0751 ± 0.0032	167386-49-4*0
Vinylvinylidene anion		423.2	416.6	± 2.7	kJ/mol	52.0751 ± 0.0032	167386-49-4*2
Ethenol		-113.11	-123.49	± 0.52	kJ/mol	44.0526 ± 0.0017	557-75-5*0
Acetone enol		-152.0	-168.8	± 1.1	kJ/mol	58.0791 ± 0.0025	29456-04-0*0
1,2-Butadien-1-ylidene		511.7	506.2	± 2.1	kJ/mol	52.0746 ± 0.0032	119908-55-3*0
1,2-Butadien-1-ylidene		651.7	646.2	± 3.7	kJ/mol	52.0746 ± 0.0032	119908-55-3*1
Dioxodiazoxane		93.0	88.1	± 1.3	kJ/mol	76.01168 ± 0.00091	122413-35-8*0
Formic acid anion		-256.2	-262.3	± 1.8	kJ/mol	46.0259 ± 0.0010	19066-82-1*0
Nitrogen atom anion		487.6	489.9	± 2.5	kJ/mol	14.007289 ± 0.000070	17778-87-9*0
Hydrogen peroxide cation		931.01	924.13	± 0.98	kJ/mol	34.01413 ± 0.00062	12325-10-9*21
2-Hydroxyethyl		-13.37	-26.63	± 0.56	kJ/mol	45.0605 ± 0.0017	4422-54-2*0
Vinyl alcohol cation		778.7	767.7	± 1.3	kJ/mol	44.0520 ± 0.0017	57239-63-1*0
Peroxyformyl		-100.37	-105.47	± 0.92	kJ/mol	61.0168 ± 0.0012	56240-83-6*0
Hydrazine anion		232.3	217.9	± 4.1	kJ/mol	32.04579 ± 0.00031	65391-88-0*0
(Formyloxy)methyl		-151.8	-159.9	± 1.3	kJ/mol	59.0440 ± 0.0017	3122-12-1*0
1,2,3-Butatrien-1-ylium		1271.7	1269.9	± 1.1	kJ/mol	51.0661 ± 0.0032	81932-79-8*0
Nitrogen sesquioxide cation		1027.7	1023.7	± 4.8	kJ/mol	76.01113 ± 0.00091	10544-73-70
Carboxymethyl		-227.2	-237.0	± 1.2	kJ/mol	59.0440 ± 0.0017	2887-46-9*0
Oxiranylidene		213.5	209.2	± 1.4	kJ/mol	42.0367 ± 0.0016	50983-85-2*0
Tetraoxidanyl		2.0	0.2	± 3.0	kJ/mol	65.0055 ± 0.0012	69696-93-1*0
Hydrobromate ion		-5.6	-12.1	± 4.3	kJ/mol	80.9125 ± 0.0010	85532-97-4*0
2-Methoxy-2-oxoethyl		-203.4	-218.6	± 1.6	kJ/mol	73.0706 ± 0.0025	54668-31-4*0
1-Buten-3-yn-1-yl		547.17	544.66	± 0.88	kJ/mol	51.0666 ± 0.0032	2810-61-9*0
1-Buten-3-ynylium		1482.3	1480.1	± 1.5	kJ/mol	51.0661 ± 0.0032	84654-85-3*0
But-1-en-3-yn-1-ide		419.7	419.1	± 1.3	kJ/mol	51.0672 ± 0.0032	119611-65-3*0
Methoxyethene		-89.3	-106.6	± 1.1	kJ/mol	58.0791 ± 0.0025	107-25-5*0
Imidogen		509.34	509.39	± 0.17	kJ/mol	15.014680 ± 0.000099	13774-92-0*2
Hypochloroperoxoous acid, hydroxy ester		49.2	42.4	± 1.9	kJ/mol	84.4588 ± 0.0013	928652-99-7*0
3-Buten-1-ynylium		1572.5	1570.1	± 1.7	kJ/mol	51.0661 ± 0.0032	103928-84-3*0
Chlorine pentafluoride anion		-619.3	-622.7	± 4.4	kJ/mol	130.44526 ± 0.00090	184851-42-1*0
Chlorine atom		130.176	131.783	± 0.0011	kJ/mol	35.45270 ± 0.00090	22537-15-1*2
(Acetyloxy)methyl		-200.6	-214.3	± 1.6	kJ/mol	73.0706 ± 0.0025	2887-49-2*0
Fluoroform			-704.46	± 0.43	kJ/mol	70.01385 ± 0.00080	75-46-7*590
3-Methylene-1-cyclopropen-1-ylium		1398.6	1395.3	± 1.8	kJ/mol	51.0661 ± 0.0032	117469-28-0*0
Hydroxyamidogen		101.37	94.53	± 0.81	kJ/mol	32.02202 ± 0.00034	13940-32-4*0
Isocyanogen chloride anion		102.8	107.2	± 3.9	kJ/mol	61.4707 ± 0.0012	923019-39-0*0
2-Butynylium		1085.6	1077.4	± 1.6	kJ/mol	53.0820 ± 0.0032	64235-83-2*0
2-Cyclopropen-1-ylidenemethylium		1346.3	1343.7	± 1.8	kJ/mol	51.0661 ± 0.0032	112936-36-4*0
1,2-Difluoroethene		-302.90	-309.00	± 0.90	kJ/mol	64.0341 ± 0.0016	1691-13-0*0
1,2-Propadien-1-yl-3-ylidene anion		622.0	629.4	± 1.3	kJ/mol	36.0326 ± 0.0024	109292-47-9*1
Chloromethylene		320.27	320.55	± 0.89	kJ/mol	48.4713 ± 0.0012	2108-20-5*0
Methoxyethene		-81.9	-99.0	± 2.4	kJ/mol	58.0791 ± 0.0025	107-25-5*1
1,3-Cyclobutadien-1-ylium		1388.2	1383.2	± 1.9	kJ/mol	51.0661 ± 0.0032	81913-77-1*0
Hydroxyaminylium		1019.5	1012.4	± 2.5	kJ/mol	32.02147 ± 0.00034	66097-71-0*0
2-Hydroxyethenyl		138.01	132.18	± 0.92	kJ/mol	43.0446 ± 0.0016	108665-16-3*0
C=O-C cation		1585.8	1592.9	± 2.7	kJ/mol	40.0203 ± 0.0016	83483-98-1*0
Cyclobutenide		318.8	306.3	± 3.7	kJ/mol	53.0830 ± 0.0032	60211-42-9*0
Isocyanogen chloride cation		1480.8	1482.1	± 3.9	kJ/mol	61.4696 ± 0.0012	956475-91-5*0
Methyl nitrite		-52.40	-64.36	± 0.89	kJ/mol	61.0401 ± 0.0010	624-91-9*1
Difluorovinylidene anion		-88.2	-87.1	± 2.3	kJ/mol	62.0188 ± 0.0016	107693-92-5*0
Methane anion		27.3	19.4	± 5.1	kJ/mol	16.04301 ± 0.00085	27680-53-1*0
Phenylperoxy cation		1018.2	1001.2	± 3.1	kJ/mol	109.1022 ± 0.0049	956036-17-2*0
Phenylperoxy anion		-39.6	-56.6	± 3.3	kJ/mol	109.1032 ± 0.0049	956036-17-20
Ethoxyethene		-117.7	-136.2	± 1.5	kJ/mol	72.1057 ± 0.0033	109-92-2*0
Oxonium			-285.826	± 0.026	kJ/mol	19.02267 ± 0.00037	13968-08-6*800
Dibromovinylidene		511.0	499.9	± 4.1	kJ/mol	183.8294 ± 0.0026	261771-36-2*0
Fluorovinylidene		298.9	300.1	± 3.1	kJ/mol	44.0277 ± 0.0016	70302-00-0*0
Methyl nitrite			-88.75	± 0.56	kJ/mol	61.0401 ± 0.0010	624-91-9*500
Fulvene cation		1043.4	1027.6	± 2.7	kJ/mol	78.1113 ± 0.0048	34504-75-1*0
Fulvene anion		191.2	176.1	± 4.0	kJ/mol	78.1124 ± 0.0048	34504-63-7*0
Isocyanogen bromide cation		1470.2	1464.5	± 5.9	kJ/mol	105.9209 ± 0.0013	238754-53-5*0
Methylaminyliumyl		1388.3	1381.9	± 2.3	kJ/mol	29.04071 ± 0.00083	56924-51-7*0
Methanediol		-379.36	-392.75	± 0.92	kJ/mol	48.0413 ± 0.0010	463-57-0*0
Ethyl nitrite		-80.3	-98.5	± 1.9	kJ/mol	75.0666 ± 0.0017	109-95-5*2
Silicon cation		1237.04	1241.17	± 0.64	kJ/mol	28.08495 ± 0.00030	14067-07-3*0
Silicon anion		316.46	319.44	± 0.64	kJ/mol	28.08605 ± 0.00030	14337-02-1*0
Ethyl nitrite		-78.3	-97.2	± 1.9	kJ/mol	75.0666 ± 0.0017	109-95-5*3
Bromovinylidene		466.6	460.6	± 3.8	kJ/mol	104.9333 ± 0.0019	161957-27-3*0
Disilicon anion		375.5	379.4	± 1.9	kJ/mol	56.17155 ± 0.00060	64236-73-3*0
Nitrato		1290.62	1285.91	± 0.86	kJ/mol	62.00439 ± 0.00090	133057-96-2*0
Diazene cation		1132.49	1125.83	± 0.64	kJ/mol	30.02881 ± 0.00020	76986-17-9*0
Difluorophosgene anion		-602.3	-604.2	± 3.3	kJ/mol	66.00745 ± 0.00085	474815-26-4*0
Ethoxyethene		-111.3	-135.1	± 2.3	kJ/mol	72.1057 ± 0.0033	109-92-2*21
Trioxidaniumyl		925.5	916.6	± 1.5	kJ/mol	50.01353 ± 0.00091	161321-37-5*0
Isocyanic fluoride anion		74.3	75.9	± 5.7	kJ/mol	45.01639 ± 0.00080	357426-78-9*0
Propyl nitrite		-96.1	-119.9	± 1.8	kJ/mol	89.0932 ± 0.0025	543-67-9*0
Diiodine cation		963.523	960.408	± 0.018	kJ/mol	253.808391 ± 0.000060	28712-14-3*0
Propyl nitrite		-95.8	-120.4	± 2.5	kJ/mol	89.0932 ± 0.0025	543-67-9*2
Propyl nitrite		-96.0	-120.5	± 2.5	kJ/mol	89.0932 ± 0.0025	543-67-9*3
Propyl nitrite		-95.2	-119.8	± 2.5	kJ/mol	89.0932 ± 0.0025	543-67-9*4
Cyanomethylium		1256.77	1254.13	± 0.74	kJ/mol	40.0435 ± 0.0016	34430-18-7*0
Fluoro(fluorooxy)methylene		-134.8	-136.0	± 1.3	kJ/mol	66.00691 ± 0.00085	479587-30-9*0
Silicon carbide anion		510.0	514.6	± 4.4	kJ/mol	40.09675 ± 0.00085	86017-99-4*0
Diazenide		175.6	176.7	± 1.6	kJ/mol	29.02197 ± 0.00016	71004-29-0*0
Propyl nitrite		-95.1	-119.4	± 2.5	kJ/mol	89.0932 ± 0.0025	543-67-9*5
Ethoxyethene		-110.7	-132.9	± 2.6	kJ/mol	72.1057 ± 0.0033	109-92-2*1
Silicon carbide		-70.5	-71.5	± 1.5	kJ/mol	40.09620 ± 0.00085	409-21-2*500
Propyl nitrite		-93.2	-118.2	± 2.5	kJ/mol	89.0932 ± 0.0025	543-67-9*6
Chlorohydroxymethyl		-54.7	-60.5	± 1.1	kJ/mol	65.4787 ± 0.0012	147139-06-8*0
Propyl nitrite		-92.9	-118.1	± 2.5	kJ/mol	89.0932 ± 0.0025	543-67-9*7
Oxoiodonium		1066.1	1064.1	± 1.9	kJ/mol	142.90332 ± 0.00030	81182-81-2*0
Ethoxyethene		-108.7	-131.9	± 2.3	kJ/mol	72.1057 ± 0.0033	109-92-2*11
Propyl nitrite		-91.5	-116.4	± 2.8	kJ/mol	89.0932 ± 0.0025	543-67-9*8
Peroxyhypochlorous acid cation		1030.3	1024.5	± 2.5	kJ/mol	68.4589 ± 0.0011	67952-07-20
Oxiranylium		901.2	893.2	± 1.5	kJ/mol	43.0441 ± 0.0016	57789-76-1*0
Dioxoethylium		688.2	689.5	± 3.1	kJ/mol	57.0276 ± 0.0017	1994332-01-20
Silylene		272.5	270.8	± 1.2	kJ/mol	30.10138 ± 0.00033	13825-90-6*0
Ethanedial anion		-189.1	-190.6	± 3.3	kJ/mol	57.0287 ± 0.0017	1994332-01-2*0
Isoformyl anion		55.7	58.4	± 1.8	kJ/mol	29.01859 ± 0.00086	81747-63-9*0
1,2-Dibromoethene		121.2	101.1	± 2.0	kJ/mol	185.8453 ± 0.0026	540-49-8*0
Oxiranyl anion		121.2	113.3	± 1.5	kJ/mol	43.0452 ± 0.0016	72722-59-9*0
Disilane cation		1030.5	1017.7	± 2.3	kJ/mol	62.21809 ± 0.00073	96301-43-8*0
Hydrogen peroxide			-190.75	± 0.30	kJ/mol	34.01468 ± 0.00062	7722-84-1*800
Propynylidene		597.6	599.4	± 1.3	kJ/mol	38.0480 ± 0.0024	67152-18-5*2
Hydroxyoxoethenylium		866.2	865.0	± 3.5	kJ/mol	57.0276 ± 0.0017	1994332-00-10
Ethynediolide		-133.1	-134.2	± 3.5	kJ/mol	57.0287 ± 0.0017	1994332-00-1*0
Phosgene cation		897.1	896.0	± 1.7	kJ/mol	98.9150 ± 0.0020	73249-38-4*0
Chlorous acid cation		996.6	991.6	± 3.1	kJ/mol	68.4589 ± 0.0011	99559-66-70
Phosgene			-242.74	± 0.27	kJ/mol	98.9155 ± 0.0020	75-44-5*501
Cyclopropylidene		474.87	466.84	± 0.85	kJ/mol	40.0639 ± 0.0024	2143-70-6*0
Phosgene		-255.44	-242.74	± 0.27	kJ/mol	98.9155 ± 0.0020	75-44-5*502
Chlorine trifluoride anion		-480.4	-481.9	± 3.6	kJ/mol	92.44846 ± 0.00090	184289-50-7*0
Trihydrogen		745.878	743.199	± 0.062	kJ/mol	3.02382 ± 0.00021	12184-91-7*0
Chlorine chlorite		168.6	166.4	± 1.3	kJ/mol	102.9042 ± 0.0019	105206-44-8*0
Chloro(chlorooxy)methylene		73.5	73.9	± 3.6	kJ/mol	98.9155 ± 0.0020	479587-31-0*0
Ethynol		409.4	406.3	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*13
Oxoethylidene		261.1	258.3	± 1.1	kJ/mol	42.0367 ± 0.0016	39920-84-8*0
Hydroxysilyl anion		-218.9	-226.8	± 2.8	kJ/mol	47.10927 ± 0.00047	78450-47-2*2
Chloro(chlorooxy)methylene		98.	105.	± 15.	kJ/mol	98.9155 ± 0.0020	479587-31-0*1
(Methylamino)methyl anion		201.2	184.3	± 3.2	kJ/mol	44.0763 ± 0.0017	31277-25-50
Chloroethane		-134.30	-135.92	± 0.27	kJ/mol	64.5138 ± 0.0019	75-00-3*500
2,2,4-Trimethylpentane		-171.3	-223.7	± 1.5	kJ/mol	114.2285 ± 0.0065	540-84-1*0
Benzvalene cation		1200.1	1184.7	± 2.7	kJ/mol	78.1113 ± 0.0048	81050-63-7*0
Cyanic fluoride cation		1294.4	1294.9	± 1.1	kJ/mol	45.01529 ± 0.00080	62532-69-8*0
Cyanic fluoride anion		-20.4	-18.4	± 2.9	kJ/mol	45.01639 ± 0.00080	34507-50-1*0
Cyclopropane		41.41	35.72	± 0.53	kJ/mol	42.0797 ± 0.0024	75-19-4*500
Oxirene		387.8	384.5	± 1.4	kJ/mol	42.0367 ± 0.0016	157-18-6*1
Diazoethenylidene anion		529.7	532.3	± 3.5	kJ/mol	52.0354 ± 0.0016	130760-11-10
Water anion		-50.1	-53.0	± 4.3	kJ/mol	18.01583 ± 0.00033	12259-30-2*0
Peroxyformate		-340.91	-346.36	± 0.95	kJ/mol	61.0174 ± 0.0012	104960-05-6*0
Peroxyhypochlorous acid anion		-32.2	-34.0	± 2.6	kJ/mol	68.4600 ± 0.0011	67952-08-30
Oxoniumyl ion		978.719	975.569	± 0.028	kJ/mol	18.01473 ± 0.00033	56583-62-1*2
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
Butadienylacetylene		358.7	346.2	± 1.9	kJ/mol	78.1118 ± 0.0048	10420-90-3*0
Cyclopentadienide		100.2	87.2	± 1.1	kJ/mol	65.0937 ± 0.0040	12127-83-2*0
(3Z)-1,3-Hexadien-5-yne	$C=C/C=C\C#C$	358.7	346.1	± 2.5	kJ/mol	78.1118 ± 0.0048	5222-76-4*0
Divinylacetylene		361.7	350.6	± 2.0	kJ/mol	78.1118 ± 0.0048	821-08-9*0
Ethynol cation		1063.8	1061.2	± 2.9	kJ/mol	42.0361 ± 0.0016	84005-02-7*0
Divinylacetylene		362.3	351.2	± 2.6	kJ/mol	78.1118 ± 0.0048	821-08-9*1
Biallenyl		410.5	399.4	± 1.5	kJ/mol	78.1118 ± 0.0048	29776-96-3*0
Nitrous acid anion		-105.84	-109.31	± 0.78	kJ/mol	47.01403 ± 0.00061	256393-36-9*0
Biallenyl		419.3	408.0	± 2.3	kJ/mol	78.1118 ± 0.0048	29776-96-3*2
Propargylallene		431.2	419.8	± 1.4	kJ/mol	78.1118 ± 0.0048	33142-15-3*0
Trihydrogen cation		1110.577	1106.695	± 0.013	kJ/mol	3.02327 ± 0.00021	28132-48-1*1
Propargylallene		432.1	420.5	± 2.2	kJ/mol	78.1118 ± 0.0048	33142-15-3*2
Hydrazoic acid anion		309.0	303.2	± 2.3	kJ/mol	43.02871 ± 0.00022	203264-98-6*0
(Chlorooxy)methylene		155.4	155.2	± 3.7	kJ/mol	64.4707 ± 0.0012	331419-80-8*1
3-Methylene-1-penten-4-yne		362.5	350.1	± 2.2	kJ/mol	78.1118 ± 0.0048	6929-96-0*0
3-Methylene-1-penten-4-yne		374.6	362.3	± 2.8	kJ/mol	78.1118 ± 0.0048	6929-96-0*3
1,2,3,5-Hexatetraene		391.6	380.2	± 1.6	kJ/mol	78.1118 ± 0.0048	60239-33-0*0
Isocyanic fluoride cation		1618.4	1619.0	± 4.0	kJ/mol	45.01529 ± 0.00080	16992-26-00
1,2,3,5-Hexatetraene		400.4	388.8	± 2.3	kJ/mol	78.1118 ± 0.0048	60239-33-0*2
(Chlorooxy)methylene		119.1	117.8	± 2.7	kJ/mol	64.4707 ± 0.0012	331419-80-8*0
Isofulminic acid cation		1376.9	1374.8	± 2.9	kJ/mol	43.02423 ± 0.00086	117800-60-9*0
(Dimethylamino)methyl anion		190.2	166.0	± 3.3	kJ/mol	58.1029 ± 0.0025	125231-49-4*0
Diazene		207.12	199.98	± 0.41	kJ/mol	30.02936 ± 0.00020	3618-05-1*0
Trioxygen difluoride		113.4	107.6	± 2.1	kJ/mol	85.99501 ± 0.00090	16829-28-0*2
Formylimidogen		245.2	242.1	± 4.6	kJ/mol	43.02478 ± 0.00086	42288-92-6*1
Nitrosyl nitrite anion		-103.0	-106.1	± 2.8	kJ/mol	76.01223 ± 0.00091	122413-35-80
trans-Cycloheptene		141.6	103.6	± 1.9	kJ/mol	96.1702 ± 0.0057	45509-99-7*0
1-Propen-1-yl-3-ylidene		656.6	653.1	± 2.0	kJ/mol	39.0559 ± 0.0024	84654-90-0*12
2-Propenylidene		417.4	410.4	± 1.5	kJ/mol	40.0639 ± 0.0024	19527-08-3*1
Dioxyamidogen		251.1	244.6	± 2.5	kJ/mol	47.01348 ± 0.00061	71843-95-3*1
Hydrodioxonitrogen cation		1130.2	1123.6	± 3.0	kJ/mol	47.01293 ± 0.00061	252986-76-8*0
(Z)-1-Methylallyl	$C/C=C\[CH2]$	157.2	139.8	± 2.1	kJ/mol	55.0984 ± 0.0032	98705-00-1*0
1-Methylallyl		154.61	138.14	± 0.79	kJ/mol	55.0984 ± 0.0032	15819-46-2*0
1,1-Dibromoethane			-67.1	± 1.3	kJ/mol	187.8612 ± 0.0026	557-91-5*500
Bromoform			3.5	± 1.3	kJ/mol	252.7306 ± 0.0031	75-25-2*590
Chloroformyl anion		-356.5	-352.9	± 3.3	kJ/mol	63.4633 ± 0.0012	41976-93-6*0
2-Propenylidene		417.4	410.4	± 1.5	kJ/mol	40.0639 ± 0.0024	19527-08-3*0
Aminomethylidyne anion		481.6	478.0	± 3.2	kJ/mol	28.03387 ± 0.00082	96808-04-7*1
Ethynol		455.5	452.2	± 3.2	kJ/mol	42.0367 ± 0.0016	32038-79-2*14
1,2-Dichloroethene		3.47	-1.85	± 0.54	kJ/mol	96.9427 ± 0.0024	540-59-0*0
N-Methylethanamine			-75.2	± 2.3	kJ/mol	59.1103 ± 0.0025	624-78-2*500
Hydrogen peroxide		-129.451	-135.458	± 0.063	kJ/mol	34.01468 ± 0.00062	7722-84-1*1
Iminomethyl		275.79	272.19	± 0.61	kJ/mol	28.03332 ± 0.00082	15691-95-9*0
Hydroxymethylene anion		147.1	144.2	± 1.6	kJ/mol	30.02653 ± 0.00087	207914-87-2*0
2-Methyl-2-propanamine			-150.74	± 0.54	kJ/mol	73.1369 ± 0.0033	75-64-9*590
3-Buten-2-one		-95.49	-111.02	± 0.87	kJ/mol	70.0898 ± 0.0032	78-94-4*0
Cyanogen		273.93	289.18	± 0.42	kJ/mol	52.0349 ± 0.0016	460-19-5*500
2-Propenylidene		419.0	411.4	± 2.3	kJ/mol	40.0639 ± 0.0024	19527-08-3*12
Naphthalene cation		956.72	933.65	± 0.60	kJ/mol	128.1700 ± 0.0080	34512-27-1*0
Naphthalene anion		187.4	164.5	± 3.1	kJ/mol	128.1711 ± 0.0080	34509-91-6*0
Isocyanic acid anion		-54.3	-57.4	± 3.0	kJ/mol	43.02533 ± 0.00086	444010-28-00
COC vdW		589.7	598.5	± 1.5	kJ/mol	40.0208 ± 0.0016	12071-24-80
Dinitrogen anion		192.5	192.5	± 1.7	kJ/mol	28.01403 ± 0.00014	12185-02-3*0
Isocyanogen anion		386.6	388.7	± 3.3	kJ/mol	52.0354 ± 0.0016	83951-85-30
Cyanogen chloride anion		46.7	51.0	± 3.1	kJ/mol	61.4707 ± 0.0012	12281-43-5*0
Iminomethide		237.3	233.6	± 1.8	kJ/mol	28.03387 ± 0.00082	90623-30-6*0
Diphenylacetylene			407.6	± 1.5	kJ/mol	178.2292 ± 0.0112	501-65-5*0
Hydrodioxonitrate		-61.8	-68.2	± 3.2	kJ/mol	47.01403 ± 0.00061	61508-71-2*0
3-Buten-2-one		-93.9	-109.9	± 1.6	kJ/mol	70.0898 ± 0.0032	78-94-4*2
Oxide		651.	653.	± 15.	kJ/mol	16.00050 ± 0.00030	16833-27-5*0
1,3-Butadien-2-ol		-48.4	-64.7	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*12
Cyanogen bromide cation		1331.6	1325.3	± 1.1	kJ/mol	105.9209 ± 0.0013	34749-77-4*0
O--HH Complex		247.6	248.9	± 2.7	kJ/mol	18.01528 ± 0.00033	7732-18-5101
1,3-Butadien-2-ol		-38.3	-54.7	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*22
Hydroxymethylene cation		971.9	968.3	± 1.4	kJ/mol	30.02543 ± 0.00087	135395-06-1*0
Butadiynylium		1781.2	1787.7	± 3.2	kJ/mol	49.0502 ± 0.0032	76108-67-3*0
2-Iodoethanol		-132.0	-150.2	± 2.5	kJ/mol	171.9650 ± 0.0017	624-76-0*0
1,3-Butadien-2-ol		-43.1	-59.1	± 2.3	kJ/mol	70.0898 ± 0.0032	59120-04-6*2
Diisocyanogen anion		456.8	462.5	± 3.6	kJ/mol	52.0354 ± 0.0016	78800-22-30
Diisocyanogen cation		1825.3	1828.5	± 3.2	kJ/mol	52.0343 ± 0.0016	78800-21-20
1,3-Butadien-2-ol		-53.8	-68.7	± 1.6	kJ/mol	70.0898 ± 0.0032	59120-04-6*0
Water		-286.300	-285.828	± 0.026	kJ/mol	18.01528 ± 0.00033	7732-18-5*499
Fluorine atom		82.093	83.878	± 0.047	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*2
Dinitrogen tetraoxide		-37.84	-26.99	± 0.19	kJ/mol	92.0111 ± 0.0012	10544-72-6*500
Difluoromethane			-468.74	± 0.36	kJ/mol	52.02339 ± 0.00081	75-10-5*590
Chlorous acid anion		-154.2	-156.1	± 3.3	kJ/mol	68.4600 ± 0.0011	99559-66-7*0
Hydroperoxonium		738.1	727.8	± 1.2	kJ/mol	35.02207 ± 0.00064	70850-26-9*0
Chlorine pentafluoride cation		1005.8	996.8	± 3.3	kJ/mol	130.44417 ± 0.00090	478167-78-1*0
Methylaminyliumyl		1423.0	1416.1	± 2.3	kJ/mol	29.04071 ± 0.00083	56924-51-7*2
1,2-Propadien-1-one anion		49.5	48.3	± 3.1	kJ/mol	54.0479 ± 0.0024	159171-62-7*0
Trioxodinitrate anion		-104.2	-107.5	± 1.9	kJ/mol	76.01223 ± 0.00091	194856-62-7*0
Krypton dication		3701.124	3701.124	± 0.013	kJ/mol	83.7989 ± 0.1000	18469-91-5*0
Propargylenide		434.4	437.6	± 1.1	kJ/mol	38.0485 ± 0.0024	82906-05-6*0
Xenon dication		3194.14	3194.14	± 0.36	kJ/mol	131.2889 ± 0.0200	14066-95-6*0
Carbon		1114.961	1120.107	± 0.045	kJ/mol	12.01070 ± 0.00080	7440-44-0*3
Neon dication		6032.988	6033.214	± 0.0041	kJ/mol	20.17860 ± 0.00060	14041-55-5*0
Neon trication		12152.403	12152.403	± 0.033	kJ/mol	20.17805 ± 0.00060	14158-25-9*0
Neon tetracation		21529.82	21531.45	± 0.25	kJ/mol	20.17751 ± 0.00060	14041-56-6*0
Neon pentacation		33711.1	33711.1	± 1.2	kJ/mol	20.17696 ± 0.00060	14175-48-5*0
Neon hexacation		48949.3	48949.3	± 1.3	kJ/mol	20.17641 ± 0.00060	14041-57-7*0
Neon heptacation		68948.7	68948.7	± 1.5	kJ/mol	20.17586 ± 0.00060	14175-50-9*0
Neon octacation		92018.2	92018.2	± 1.5	kJ/mol	20.17531 ± 0.00060	14782-26-4*0
Neon nonacation		207396.1	207396.1	± 1.5	kJ/mol	20.17476 ± 0.00060	15721-59-2*0
Neon cation		2080.662	2080.769	± 0.000	kJ/mol	20.17915 ± 0.00060	14782-23-1*0
Neon decacation		338828.3	338828.3	± 1.5	kJ/mol	20.17421 ± 0.00060	32218-07-8*0
Argon dimer cation		1393.760	1391.173	± 0.018	kJ/mol	79.8955 ± 0.0020	17596-58-6*0
Argon cation		1520.571	1520.580	± 0.000	kJ/mol	39.94745 ± 0.00100	14791-69-6*0
Argon dimer		-1.013	-6.347	± 0.0051	kJ/mol	79.8960 ± 0.0020	12595-59-4*0
Helium cation		2372.322	2372.322	± 0.000	kJ/mol	4.0020534 ± 0.0000020	14234-48-1*0
Helium dication		7622.839	7622.839	± 0.000	kJ/mol	4.0015048 ± 0.0000020	12587-46-1*0
Helium anion		51.	51.	± 130.	kJ/mol	4.0031506 ± 0.0000020	14452-58-5*1
Helium anion		51.	51.	± 130.	kJ/mol	4.0031506 ± 0.0000020	14452-58-5*0
Argon anion		23.	23.	± 75.	kJ/mol	39.94855 ± 0.00100	16544-90-4*1
Argon anion		23.	23.	± 75.	kJ/mol	39.94855 ± 0.00100	16544-90-4*0
Helium anion		1868.43	1868.43	± 0.11	kJ/mol	4.0031506 ± 0.0000020	14452-58-5*2
Helium anion		1904.823	1904.824	± 0.0011	kJ/mol	4.0031506 ± 0.0000020	14452-58-5*3
Helium anion		5724.9	5724.9	± 1.5	kJ/mol	4.0031506 ± 0.0000020	14452-58-5*4
Argon anion		1111.116	1111.116	± 0.098	kJ/mol	39.94855 ± 0.00100	16544-90-4*2
Hydron		0	0	exact		1.007391 ± 0.000070	12408-02-5*800

References

1		B. Ruscic, R. E. Pinzon, M. L. Morton, G. von Laszewski, S. Bittner, S. G. Nijsure, K. A. Amin, M. Minkoff, and A. F. Wagner, Introduction to Active Thermochemical Tables: Several "Key" Enthalpies of Formation Revisited. J. Phys. Chem. A 108, 9979-9997 (2004) [DOI: 10.1021/jp047912y]
2		B. Ruscic, R. E. Pinzon, G. von Laszewski, D. Kodeboyina, A. Burcat, D. Leahy, D. Montoya, and A. F. Wagner, Active Thermochemical Tables: Thermochemistry for the 21^st Century. J. Phys. Conf. Ser. 16, 561-570 (2005) [DOI: 10.1088/1742-6596/16/1/078]
3		B. Ruscic and D. H. Bross, Active Thermochemical Tables (ATcT) values based on ver. 1.122r of the Thermochemical Network, Argonne National Laboratory, Lemont, Illinois 2021 [DOI: 10.17038/CSE/1822363]; available at ATcT.anl.gov
4		D. Feller, D. H. Bross, and B. Ruscic, Enthalpy of Formation of C2H2O4 (Oxalic Acid) from High-Level Calculations and the Active Thermochemical Tables Approach. J. Phys. Chem. A 123, 3481-3496 (2019) [DOI: 10.1021/acs.jpca.8b12329]
5		B. K. Welch, R. Dawes, D. H. Bross, and B. Ruscic, An Automated Thermochemistry Protocol Based on Explicitly Correlated Coupled-Cluster Theory: The Methyl and Ethyl Peroxy Families. J. Phys. Chem. A 123, 5673-5682 (2019) [DOI: 10.1021/acs.jpca.8b12329]
6		D. H. Bross, H.-G. Yu, L. B. Harding, and B. Ruscic, Active Thermochemical Tables: The Partition Function of Hydroxymethyl (CH2OH) Revisited. J. Phys. Chem. A 123, 4212-4231 (2019) [DOI: 10.1021/acs.jpca.9b02295]
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: 04/18/2025

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