CH2=C(iPr)O anion
- Formula: C5H9O-
- Molecular weight: 85.1249
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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 by: John E. Bartmess
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Individual Reactions
C5H9O- + =
By formula: C5H9O- + H+ = C5H10O
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1537. ± 9.2 | kJ/mol | G+TS | Cumming and Kebarle, 1978 | gas phase; Structure assignment revised to less-substituted site: Chyall, Brickhouse, et al., 1994 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 1508. ± 8.4 | kJ/mol | IMRE | Cumming and Kebarle, 1978 | gas phase; Structure assignment revised to less-substituted site: Chyall, Brickhouse, et al., 1994 |
Gas phase ion energetics data
Go To: Top, Reaction 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
Electron affinity of neutral species
| EAneutral (eV) | Method | Reference | Comment |
|---|---|---|---|
| 1.83 ± 0.13 | D-EA | Cumming and Kebarle, 1978 | Structure assignment revised to less-substituted site: Chyall, Brickhouse, et al., 1994 |
Protonation reactions
C5H9O- + =
By formula: C5H9O- + H+ = C5H10O
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1537. ± 9.2 | kJ/mol | G+TS | Cumming and Kebarle, 1978 | gas phase; Structure assignment revised to less-substituted site: Chyall, Brickhouse, et al., 1994 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 1508. ± 8.4 | kJ/mol | IMRE | Cumming and Kebarle, 1978 | gas phase; Structure assignment revised to less-substituted site: Chyall, Brickhouse, et al., 1994 |
References
Go To: Top, Reaction 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.
Cumming and Kebarle, 1978
Cumming, J.B.; Kebarle, P.,
Summary of gas phase measurements involving acids AH. Entropy changes in proton transfer reactions involving negative ions. Bond dissociation energies D(A-H) and electron affinities EA(A),
Can. J. Chem., 1978, 56, 1. [all data]
Chyall, Brickhouse, et al., 1994
Chyall, L.J.; Brickhouse, M.D.; Schnute, M.E.; Squires, R.R.,
Kinetic versus thermodynamic control in the deprotonation of unsymmetrical ketones in the gas phase,
J. Am. Chem. Soc., 1994, 116, 19, 8681, https://doi.org/10.1021/ja00098a031
. [all data]
Notes
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
EAneutral Electron affinity of neutral species 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
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