Hydrogen

• Formula: H₂
• Molecular weight: 2.01588
• IUPAC Standard InChI: InChI=1S/H2/h1H Copy

  
• IUPAC Standard InChIKey: UFHFLCQGNIYNRP-UHFFFAOYSA-N Copy
• CAS Registry Number: 1333-74-0
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Isotopologues:
  • tritium
  • deuterium hydride
  • Deuterium
• Other names: Dihydrogen; o-Hydrogen; p-Hydrogen; Molecular hydrogen; H2; UN 1049; UN 1966
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Reaction thermochemistry data (reactions 251 to 300)
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data: reactions 1 to 50, reactions 51 to 100, reactions 101 to 150, reactions 151 to 200, reactions 201 to 250, reactions 301 to 350, reactions 351 to 400, reactions 401 to 450, reactions 451 to 500, reactions 501 to 550, reactions 551 to 600, reactions 601 to 621
  • Henry's Law data
  • Gas phase ion energetics data
  • Ion clustering data
  • Mass spectrum (electron ionization)
  • Constants of diatomic molecules
  • Fluid Properties
• Data at other public NIST sites:
  • Electron-Impact Ionization Cross Sections (on physics web site)
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Reaction thermochemistry data

Go To: Top, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
MS - José A. Martinho Simões

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Reactions 251 to 300

2 +  =

By formula: 2H₂ + C₈H₁₀ = C₈H₁₄

 +  =

By formula: H₂ + C₅H₈ = C₅H₁₀

 +  =

By formula: H₂ + C₉H₁₆ = C₉H₁₈

2 +  =

By formula: 2H₂ + C₇H₁₀ = C₇H₁₄

 +  =

By formula: H₂ + C₇H₁₂ = C₇H₁₄

2 +  =

By formula: 2H₂ + C₆H₁₀ = C₆H₁₄

2 +  =

By formula: 2H₂ + C₆H₁₀ = C₆H₁₄

 +  =

By formula: H₂ + C₂₇H₄₆ = C₂₇H₄₈

3 +  = 3

By formula: 3H₂ + C₁₂H₂₁N₃ = 3C₄H₉N

3 +  =

By formula: 3H₂ + C₇H₆O = C₇H₁₂O

4 +  =

By formula: 4H₂ + C₈H₈ = C₈H₁₆

2 +  =

By formula: 2H₂ + C₈H₁₀ = C₈H₁₄

3 + C₉H₁₂ =

By formula: 3H₂ + C₉H₁₂ = C₉H₁₈

2 +  =

By formula: 2H₂ + C₈H₁₄ = C₈H₁₈

2 +  =

By formula: 2H₂ + C₈H₁₄ = C₈H₁₈

2 +  =

By formula: 2H₂ + C₉H₁₄ = C₉H₁₈

2 +  =

By formula: 2H₂ + C₆H₁₀ = C₆H₁₄

 +  =

By formula: H₂ + C₈H₁₄ = C₈H₁₆

 +  =

By formula: H₂ + C₇H₁₂ = C₇H₁₄

4 +  =

By formula: 4H₂ + C₁₄H₂₀ = C₁₄H₂₈

 +  =

By formula: H₂ + C₈H₁₄ = C₈H₁₆

 +  =

By formula: C₈H₁₆ + H₂ = C₈H₁₈

 +  =

By formula: H₂ + C₁₂H₂₄ = C₁₂H₂₆

 +  =

By formula: H₂ + C₁₂H₂₄ = C₁₂H₂₆

 +  =

By formula: H₂ + C₉H₁₆ = C₉H₁₈

 +  =

By formula: H₂ + C₁₀H₁₈ = C₁₀H₂₀

 +  =

By formula: H₂ + C₁₀H₁₈ = C₁₀H₂₀

2 +  =

By formula: 2H₂ + C₆H₁₀ = C₆H₁₄

2 +  =

By formula: 2H₂ + C₆H₁₀ = C₆H₁₄

2 +  =

By formula: 2H₂ + C₆H₁₀ = C₆H₁₄

2 +  =

By formula: 2H₂ + C₆H₁₀ = C₆H₁₄

 +  =

By formula: H₂ + C₂₇H₄₆ = C₂₇H₄₈

3 +  = 3

By formula: 3H₂ + C₁₅H₂₇N₃ = 3C₅H₁₁N

3 +  =

By formula: 3H₂ + C₁₀H₁₆ = C₁₀H₂₂

 +  =

By formula: H₂ + C₈H₁₂ = C₈H₁₄

2 +  =

By formula: 2H₂ + C₆H₁₀ = C₆H₁₄

2 +  = C₆H₁₂F₂

By formula: 2H₂ + C₆H₈F₂ = C₆H₁₂F₂

2 +  = C₆H₁₂F₂

By formula: 2H₂ + C₆H₈F₂ = C₆H₁₂F₂

 +  =

By formula: H₂ + C₅H₆F₂ = C₅H₈F₂

2 +  =

By formula: 2H₂ + C₁₁H₁₈ = C₁₁H₂₂

 +  =

By formula: H₂ + C₈H₁₂ = C₈H₁₄

2 +  =

By formula: 2H₂ + C₇H₈ = C₇H₁₂

 +  =

By formula: H₂ + C₈H₁₄ = C₈H₁₆

 +  =

By formula: H₂ + C₁₀H₁₂ = C₁₀H₁₄

 + 2 = 2 + 

By formula: H₂ + 2CH₃I = 2CH₄ + I₂

3 +  =

By formula: 3H₂ + C₁₀H₁₆ = C₁₀H₂₂

 +  =

By formula: H₂ + C₁₁H₁₆ = C₁₁H₁₈

4 +  =

By formula: 4H₂ + C₈H₈ = C₈H₁₆

4 +  =

By formula: 4H₂ + C₆H₆ = C₆H₁₄

C₂₀H₃₂Zr (solution) +  (solution) = C₂₀H₃₀I₂Zr (solution) +  (g)

By formula: C₂₀H₃₂Zr (solution) + I₂ (solution) = C₂₀H₃₀I₂Zr (solution) + H₂ (g)

References

Go To: Top, Reaction thermochemistry data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Turner, Goebel, et al., 1968
Turner, R.B.; Goebel, P.; Mallon, B.J.; Doering, W.E.; Coburn, J.F., Jr.; Pomerantz, M., Heats of hydrogenation. VIII. Compounds with three- and four-membered rings, J. Am. Chem. Soc., 1968, 90, 4315-4322. [all data]

Turner and Meador, 1957
Turner, R.B.; Meador, W.R., Heats of hydrogenation. IV. Hydrogenation of some cis- and trans-cycloolefins, J. Am. Chem. Soc., 1957, 79, 4133-4136. [all data]

Roth, Klarner, et al., 1980
Roth, W.R.; Klarner, F.-G.; Lennartz, H.-W., Heats of hydrogenation. II. Heat of hydrogenation of bicyclo[2.1.0]pent-2-ene, an antiaromatic system, Chem. Ber., 1980, 113, 1806-1818. [all data]

Fang and Rogers, 1992
Fang, W.; Rogers, D.W., Enthalpy of hydrogenation of the hexadienes and cis- and trans-1,3,5-hexatriene, J. Org. Chem., 1992, 57, 2294-2297. [all data]

Turner, Meador, et al., 1957
Turner, R.B.; Meador, W.R.; Winkler, R.E., Heats of hydrogenation. II. Heats of hydrogenation and the acid-catalyzed isomerization of some unsaturated steroids, J. Am. Chem. Soc., 1957, 79, 4122-4127. [all data]

Wiberg, Nakaji, et al., 1993
Wiberg, K.B.; Nakaji, D.Y.; Morgan, K.M., Heat of hydrogenation of a cis imine. An experimental and theoretical study, J. Am. Chem. Soc., 1993, 115, 3527-3532. [all data]

Turner, Meador, et al., 1957, 2
Turner, R.B.; Meador, W.R.; Doering, W.E.; Knox, L.H.; Mayer, J.R.; Wiley, D.W., Heats of hydrogenation. III. Hydrogenation of cycllooctatetraene and of some seven-membered non-benzenoid aromatic compounds, J. Am. Chem. Soc., 1957, 79, 4127-4133. [all data]

Turner, Meador, et al., 1957, 3
Turner, R.B.; Meador, W.R.; Winkler, R.E., Heats of hydrogenation. I. Apparatus and the heats of hydrogenation of bicyclo[2,2,1]heptene, bicyclo[2,2,1]heptadiene, bicyclo[2,2,2]octene and bicyclo[2,2,2]octadiene, J. Am. Chem. Soc., 1957, 79, 4116-4121. [all data]

Roth, Bang, et al., 1964
Roth, W.R.; Bang, W.B.; Goebel, P.; Sass, R.L.; Sass, R.L.; Turner, R.B.; Yu, A.P., On the question of homoconjugation in cis,cis,cis-1,4,7-cyclononatriene, J. Am. Chem. Soc., 1964, 86, 3178-3179. [all data]

Roth, Lennartz, et al., 1988
Roth, W.R.; Lennartz, H-W.; Doering, W.v.E.; Dolbier, W.R., Jr.; Schmidhauser, J.C., Thermochemistry of the "orthogonal" butadienes (Z,Z)-3,4-dimethylhexa-2,4-diene and 2,3-di-tert-butylbuta-1,3-diene, J. Am. Chem. Soc., 1988, 110, 1883-1889. [all data]

Turner, Jarrett, et al., 1973
Turner, R.B.; Jarrett, A.D.; Goebel, P.; Mallon, B.J., Heats of hydrogenation. 9. Cyclic acetylenes and some miscellaneous olefins, J. Am. Chem. Soc., 1973, 95, 790-792. [all data]

Rogers and McLafferty, 1971
Rogers, D.W.; McLafferty, F.J., A new hydrogen calorimeter. Heats of hydrogenation of allyl and vinyl unsaturation adjacent to a ring, Tetrahedron, 1971, 27, 3765-3775. [all data]

Skinner and Snelson, 1959
Skinner, H.A.; Snelson, A., Heats of hydrogenation Part 3., Trans. Faraday Soc., 1959, 55, 405-407. [all data]

Roth, Kirmse, et al., 1982
Roth, W.R.; Kirmse, W.; Hoffmann, W.; Lennartz, H.W., Heats of hydrogenation. III. Effect of fluoro substituents on the thermal rearrangement of cyclopropane systems, Chem. Ber., 1982, 115, 2508-2515. [all data]

Roth, Klaerner, et al., 1983
Roth, W.R.; Klaerner, F.G.; Gerit, F.; Grimme, W.; Koeser, H.G.; Busch, R.; Muskulus, B.; Breuckmann, R.; Scholz, B.P.; Lennartz, H.W., Stereochemistry of the bicyclo[2.1.0]pentane ring opening: thermolysis of tricyclo[3.2.0.0(,)]heptane derivatives, Chem. Ber., 1983, 116, 2717-2737. [all data]

Carson, Carter, et al., 1961
Carson, A.S.; Carter, W.; Pedley, J.B., The thermochemistry of reductions caused by lithium aluminium hydride I. The C-I bond dissociation energy in CH₃I, Proc. Roy. Soc. London A, 1961, 260, 550-557. [all data]

Roth, Klarner, et al., 1992
Roth, W.R.; Klarner, F.-G.; Siepert, G.; Lennartz, H.-W., Zur Frage der Homoaromatizitat von Norcaradien und Cycloheptatrien, Chem. Ber., 1992, 125, 217-224. [all data]

Roth, Hopf, et al., 1994
Roth, W.R.; Hopf, H.; Horn, C., Propargyl-Stabilisierungsenergie, Chem. Ber., 1994, 127, 1781-1795. [all data]

Schock and Marks, 1988
Schock, L.E.; Marks, T.J., J. Am. Chem. Soc., 1988, 110, 7701. [all data]

Notes

Go To: Top, Reaction thermochemistry data, References

• Symbols used in this document:
  

  ΔrH°	Enthalpy of reaction at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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