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 601 to 621)
  • 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 251 to 300, reactions 301 to 350, reactions 351 to 400, reactions 401 to 450, reactions 451 to 500, reactions 501 to 550, reactions 551 to 600
  • 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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  • Gas Phase Kinetics Database
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Reaction thermochemistry data

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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 601 to 621

 +  =

By formula: H₂ + C₄H₆O = C₄H₈O

3 +  =

By formula: 3H₂ + C₉H₁₀ = C₉H₁₆

=  + 

By formula: C₇H₈O = C₇H₆O + H₂

 +  =

By formula: H₂ + C₅H₁₀O = C₅H₁₂O

=  + 

By formula: C₈H₁₈O = C₈H₁₆O + H₂

3 +  =

By formula: 3H₂ + C₉H₁₂ = C₉H₁₈

=  + 

By formula: C₅H₁₂O = H₂ + C₅H₁₀O

=  + 

By formula: C₅H₁₂O = H₂ + C₅H₁₀O

 +  =

By formula: H₂ + CO = CH₂O

5 +  =

By formula: 5H₂ + C₁₀H₈ = C₁₀H₁₈

2 +  =

By formula: 2H₂ + C₁₂H₁₀ = hexahydroacenaphthylene

3 +  =

By formula: 3H₂ + C₁₃H₁₀ = C₁₃H₁₆

3 +  =

By formula: 3H₂ + C₁₂H₁₀ = C₁₂H₁₆

3 +  =

By formula: 3H₂ + C₁₂H₁₆ = C₁₂H₂₂

7 +  =

By formula: 7H₂ + C₁₄H₁₀ = C₁₄H₂₄

=  + 

By formula: C₈H₁₀ = C₈H₈ + H₂

2 +  =

By formula: 2H₂ + C₁₄H₁₀ = C₁₄H₁₄

4 +  =

By formula: 4H₂ + C₁₄H₁₀ = C₁₄H₁₈

C₅H₂O₅W (g) = C₅O₅W (g) +  (g)

By formula: C₅H₂O₅W (g) = C₅O₅W (g) + H₂ (g)

 +  =

By formula: H₂ + C₁₄H₁₀ = C₁₄H₁₂

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.

Veselova and Sul'man, 1980
Veselova, M.E.; Sul'man, E.M., Effect of the chemical structure of α,β-unsaturated esters and ketones on the selectivity of their hydrogenation, Svoistva Veshchestv i Stroenie Molekul, Kalinin, 1980, 140-143. [all data]

Frye and Weitkamp, 1969
Frye, C.G.; Weitkamp, A.W., Equilibrium hydrogenations of multi-ring aromatics, J. Chem. Eng. Data, 1969, 14, 372-376. [all data]

Cubberley and Mueller, 1946
Cubberley, A.H.; Mueller, M.B., Equilibrium studies on the dehydrogenation of primary and secondary alcohols. I. 2-Butanol, 2-octanol, cyclopentanol and benzyl alcohol, J. Am. Chem. Soc., 1946, 68, 1149-1151. [all data]

Buckley and Herington, 1965
Buckley, E.; Herington, E.F.G., Equilibria in some secondary alcohol + hydrogen + ketone systems, Trans. Faraday Soc., 1965, 61, 1618-1625. [all data]

Miki, 1975
Miki, Y., The thermodynamic properties of C₉H₁₈ naphthenes. I. The determination of the equilibrium constants of the hydrogenation of propyl- and isopropylbenzene and ethyltoluenes, Bull. Chem. Soc. Jpn., 1975, 48, 201-208. [all data]

Connett, 1970
Connett, J.E., Chemical equilibria. Part III. Dehydrogenation of pentan-1-ol, pentan-2-ol, and 3-methylbutan-2-ol, J. Chem. Soc. A, 1970, 1284-1286. [all data]

Newton and Dodge, 1933
Newton, R.H.; Dodge, B.F., The equilibrium between carbon monoxide, hydrogen, formaldehyde and methanol. I. The reactions CO + H₂ = HCOH and H₂ + HCOH = CH₃OH, J. Am. Chem. Soc., 1933, 55, 4747-4759. [all data]

Frye, 1962
Frye, C.G., Equilibria in the hydrogenation of polycyclic aromatics, J. Chem. Eng. Data, 1962, 7, 592-595. [all data]

Ghosh, Ram Das Guha, et al., 1945
Ghosh, J.C.; Ram Das Guha, S.; Roy, A.N., Chemical equilibrium in styrene formation from ethyl-benzene at low pressures, Curr. Sci., 1945, 14, 269. [all data]

Ishikawa, Weersink, et al., 1987
Ishikawa, Y.; Weersink, R.A.; Hackett, P.A.; Rayner, D.M., Chem. Phys. Lett., 1987, 142, 271. [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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