Hydrogen anion
- Formula: H-
- Molecular weight: 1.00849
- IUPAC Standard InChI: InChI=1S/H/q-1
- IUPAC Standard InChIKey: KLGZELKXQMTEMM-UHFFFAOYSA-N
- CAS Registry Number: 12184-88-2
- Chemical structure:
This structure is also available as a 2d Mol file - Isotopologues:
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Options:
Gas phase thermochemistry data
Go To: Top, Gas phase ion energetics data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| S°gas,1 bar | 26.042 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in March, 1982 |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: John E. Bartmess
Protonation reactions
+
=
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 400.40 | kcal/mol | N/A | Shiell, Hu, et al., 2000 | gas phase; Given: 139714.8±1 cm-1 at 0K, or 399.465±0.003 kcal/mol |
| ΔrH° | 400.40 | kcal/mol | N/A | Pratt, McCormack, et al., 1992 | gas phase; 399.46±0.01 kcal/mol at 0K; 0.94 correction, Gurvich, Veyts, et al. |
| ΔrH° | 400.40 | kcal/mol | D-EA | Lykke, Murray, et al., 1991 | gas phase; Reported: 6082.99±0.15 cm-1, or 0.754195(18) eV |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 394.20 ± 0.10 | kcal/mol | H-TS | Shiell, Hu, et al., 2000 | gas phase; Given: 139714.8±1 cm-1 at 0K, or 399.465±0.003 kcal/mol |
| ΔrG° | 394.20 | kcal/mol | H-TS | Lykke, Murray, et al., 1991 | gas phase; Reported: 6082.99±0.15 cm-1, or 0.754195(18) eV |
References
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Shiell, Hu, et al., 2000
Shiell, R.C.; Hu, X.K.; Hu, Q.C.J.; Hepburn, J.W.,
Threshold Ion-pair Production spectroscopy (TIPPS) of H2 and D2,
Faraday Disc. Chem. Soc., 2000, 115, 331, https://doi.org/10.1039/a909428h
. [all data]
Pratt, McCormack, et al., 1992
Pratt, S.T.; McCormack, E.F.; Dehmer, J.L.; Dehmer, P.M.,
Field-Induced Ion-Pair Formation in Molecular Hydrogen,
Phys. Rev. Lett., 1992, 68, 5, 584, https://doi.org/10.1103/PhysRevLett.68.584
. [all data]
Gurvich, Veyts, et al.
Gurvich, L.V.; Veyts, I.V.; Alcock, C.B.,
Hemisphere Publishing, NY, 1989, V. 1 2, Thermodynamic Properties of Individual Substances, 4th Ed. [all data]
Lykke, Murray, et al., 1991
Lykke, K.R.; Murray, K.K.; Lineberger, W.C.,
Threshold Photodetachment of H-,
Phys. Rev. A, 1991, 43, 11, 6104, https://doi.org/10.1103/PhysRevA.43.6104
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.