Methane, protonated
- Formula: CH5+
- Molecular weight: 17.0499
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Ion clustering 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 by: Michael M. Meot-Ner (Mautner) and Sharon G. Lias
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.
Clustering reactions
By formula: CH5+ + CH4 = (CH5+ • CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 29. ± 1. | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase |
ΔrH° | 31. | kJ/mol | PHPMS | Hiraoka and Kebarle, 1975 | gas phase |
ΔrH° | 17. | kJ/mol | HPMS | Field and Beggs, 1971 | gas phase; Entropy change is questionable |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 92.5 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase |
ΔrS° | 87.0 | J/mol*K | PHPMS | Hiraoka and Kebarle, 1975 | gas phase |
ΔrS° | 51.9 | J/mol*K | HPMS | Field and Beggs, 1971 | gas phase; Entropy change is questionable |
By formula: (CH5+ • CH4) + CH4 = (CH5+ • 2CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 22. ± 1. | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase |
ΔrH° | 25. | kJ/mol | PHPMS | Hiraoka and Kebarle, 1975 | gas phase |
ΔrH° | 6.3 | kJ/mol | HPMS | Field and Beggs, 1971 | gas phase; Entropy change is questionable |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 104. | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase |
ΔrS° | 102. | J/mol*K | PHPMS | Hiraoka and Kebarle, 1975 | gas phase |
ΔrS° | 30. | J/mol*K | HPMS | Field and Beggs, 1971 | gas phase; Entropy change is questionable |
By formula: (CH5+ • 2CH4) + CH4 = (CH5+ • 3CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 13.1 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase |
ΔrH° | 17. | kJ/mol | PHPMS | Hiraoka and Kebarle, 1975 | gas phase |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 93.7 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase |
ΔrS° | 109. | J/mol*K | PHPMS | Hiraoka and Kebarle, 1975 | gas phase |
By formula: (CH5+ • 3CH4) + CH4 = (CH5+ • 4CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 12.6 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase |
ΔrH° | 16. | kJ/mol | PHPMS | Hiraoka and Kebarle, 1975 | gas phase |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 99.2 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase |
ΔrS° | 111. | J/mol*K | PHPMS | Hiraoka and Kebarle, 1975 | gas phase |
By formula: (CH5+ • 4CH4) + CH4 = (CH5+ • 5CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 11.7 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 104. | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase |
By formula: (CH5+ • 5CH4) + CH4 = (CH5+ • 6CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 11.3 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 106. | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase |
By formula: (CH5+ • 6CH4) + CH4 = (CH5+ • 7CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 11.2 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 111. | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase |
By formula: (CH5+ • 7CH4) + CH4 = (CH5+ • 8CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 8.5 ± 0.8 | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 90.4 | J/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase |
By formula: (CH5+ • 8CH4) + CH4 = (CH5+ • 9CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 6.44 | kJ/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; Entropy change calculated or estimated |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 84. | J/mol*K | N/A | Hiraoka and Mori, 1989 | gas phase; Entropy change calculated or estimated |
By formula: CH5+ + H2 = (CH5+ • H2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7.87 ± 0.42 | kJ/mol | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 50.6 | J/mol*K | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase |
By formula: (CH5+ • H2) + H2 = (CH5+ • 2H2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7.45 ± 0.42 | kJ/mol | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 67.8 | J/mol*K | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase |
By formula: (CH5+ • 2H2) + H2 = (CH5+ • 3H2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 6.74 ± 0.42 | kJ/mol | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 94.6 | J/mol*K | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase |
By formula: (CH5+ • 3H2) + H2 = (CH5+ • 4H2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 6.57 ± 0.42 | kJ/mol | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 108. | J/mol*K | PHPMS | Hiraoka, Kudaka, et al., 1991 | gas phase |
By formula: CH5+ + N2 = (CH5+ • N2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 28. | kJ/mol | HPMS | Speller, 1983 | gas phase |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 82.4 | J/mol*K | HPMS | Speller, 1983 | gas phase |
References
Go To: Top, Ion clustering data, 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.,
Gas - Phase Stability and Structure of Cluster Ions CH5+(CH4)n with n = 1 - 9,
Chem. Phys. Lett., 1989, 161, 2, 111, https://doi.org/10.1016/0009-2614(89)85040-7
. [all data]
Hiraoka and Kebarle, 1975
Hiraoka, K.; Kebarle, P.,
Energetics, Stabilities and Possible Structures of CH5+(CH4)n Clusters from Gas Phase Study of Equilibria CH5+(CH4)n - 1 + CH4 = CH5+(CH4)n for n = 1 - 5,
J. Am. Chem. Soc., 1975, 97, 15, 4179, https://doi.org/10.1021/ja00848a005
. [all data]
Field and Beggs, 1971
Field, F.H.; Beggs, D.P.,
Reversible Reactions of Gas Phase Ions. III. Studies with Methane at 0.1-1.0 Torr and 77-300 K,
J. Am. Chem. Soc., 1971, 93, 7, 1585, https://doi.org/10.1021/ja00736a003
. [all data]
Hiraoka, Kudaka, et al., 1991
Hiraoka, K.; Kudaka, I.; Yamabe, S.,
Gas-Phase Solvation of CH5+ with H2,
Chem. Phys. Lett., 1991, 184, 4, 271, https://doi.org/10.1016/0009-2614(91)85122-D
. [all data]
Speller, 1983
Speller, C.V.,
Ph. D. Thesis, Universite de Paris Sud, 1983. [all data]
Notes
Go To: Top, Ion clustering data, References
- Symbols used in this document:
ΔrH° Enthalpy of reaction at standard conditions ΔrS° Entropy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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