Reaction data
H3+ + 
= (H3+ • )
Enthalpy of reaction at standard conditions (nominally 298.15 K, 1 atm.)
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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 by: Michael M. Meot-Ner (Mautner) and Sharon G. Lias
| ΔrH° (kcal/mol) | Method | Reference | Comment |
|---|---|---|---|
| 7.0 ± 0.1 | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
| 6.9 ± 0.3 | PHPMS | Hiraoka, 1987 | gas phase; M |
| 6.6 | HPMS | Beuhler, Ehrenson, et al., 1983 | gas phase; Entropy change is questionable; M |
| 7.1 | HPMS | Beuhler, Ehrenson, et al., 1983 | gas phase; deuterated; M |
| 5.8 | DT | Elford, 1983 | gas phase; Entropy change is questionable; M; Data excluded from overall average |
| 5.8 ± 1.1 | IMob | Elford, 1983 | gas phase; M; Data excluded from overall average |
| 8.6 | DT | Johnsen, Huang, et al., 1976 | gas phase; corrected for ln T term by Keesee and Castleman, 1986; M; Data excluded from overall average |
| 9.6 | PHPMS | Hiraoka and Kebarle, 1975 | gas phase; M; Data excluded from overall average |
| 9.7 | HPMS | Bennett and Field, 1972 | gas phase; M; Data excluded from overall average |
| 5.1 | HPMS | Arifov, Pozharov, et al., 1971 | gas phase; Entropy change is questionable; M; Data excluded from overall average |
| 5.6 | HPMS | Arifov, Pozharov, et al., 1971, 2 | gas phase; deuterated, Entropy change is questionable; M; Data excluded from overall average |
References
Go To: Top, Enthalpy of reaction at standard conditions (nominally 298.15 K, 1 atm.), Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Hiraoka and Mori, 1989
Hiraoka, K.; Mori, T.,
Isotope Effect and Nature of Bonding in the Cluster Ions H3+(Ar)n and D3+(Ar)n,
J. Chem. Phys., 1989, 91, 8, 4821, https://doi.org/10.1063/1.456720
. [all data]
Hiraoka, 1987
Hiraoka, K.,
A Determination of the Stabilities of H3+(H2)n with n=1-9 from Measurements of the gas-Phase Ion Equilibria H3+(H2)n-1 + H2 = H3+(H2)n,
J. Chem. Phys., 1987, 87, 7, 4048, https://doi.org/10.1063/1.452909
. [all data]
Beuhler, Ehrenson, et al., 1983
Beuhler, R.J.; Ehrenson, S.; Friedman, L.,
Hydrogen Cluster Ion Equilibria,
J. Chem. Phys., 1983, 79, 12, 5982, https://doi.org/10.1063/1.445781
. [all data]
Elford, 1983
Elford, M.T.,
The Heat of Dissociation of H5+ Derived from Measurements of Ion Mobilities,
J. Chem. Phys., 1983, 79, 12, 5951, https://doi.org/10.1063/1.445777
. [all data]
Johnsen, Huang, et al., 1976
Johnsen, R.; Huang, C.M.; Biondi, M.A.,
Three - Body Association Reactions of H+ and H3+ Ions in Hydrogen from 135 to 300K,
J. Chem. Phys., 1976, 65, 4, 1539, https://doi.org/10.1063/1.433209
. [all data]
Keesee and Castleman, 1986
Keesee, R.G.; Castleman, A.W., Jr.,
Thermochemical data on Ggs-phase ion-molecule association and clustering reactions,
J. Phys. Chem. Ref. Data, 1986, 15, 1011. [all data]
Hiraoka and Kebarle, 1975
Hiraoka, K.; Kebarle, P.,
A Determination of the Stabilities of H5+, H7+, H9+, and H11+ from Measurement of the Gas Phase Ion Equilibria Hn+ + H2 = H(n + 2)+ (n = 3, 5, 7, 9),
J. Chem. Phys., 1975, 62, 6, 2267, https://doi.org/10.1063/1.430751
. [all data]
Bennett and Field, 1972
Bennett, S.L.; Field, F.H.,
Reversible Reactions of Gaseous Ions. VII. The Hydrogen System,
J. Am. Chem. Soc., 1972, 94, 25, 8669, https://doi.org/10.1021/ja00780a003
. [all data]
Arifov, Pozharov, et al., 1971
Arifov, U.A.; Pozharov, S.L.; Chernov, I.G.; Mukhamediev, Z.A.,
Ionic-Molecular Reactions in Hydrogen at High Pressures,
High Energy Chem., 1971, 5, 69. [all data]
Arifov, Pozharov, et al., 1971, 2
Arifov, U.A.; Pozharov, S.L.; Chernov, I.G.; Mukhamediev, Z.A.,
Mass Spectrometric Study of the Kinetics of D5+ Formation,
High Energy Chem., 1971, 5, 79. [all data]
Notes
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- 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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