3,3-dimethyl-cyclopropenide anion
- Formula: C5H7-
- Molecular weight: 67.1096
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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
C5H7- + =
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1601. ± 5.9 | kJ/mol | G+TS | Fattahi, McCarthy, et al., 2003 | gas phase; Maybe be ring-opened HCC-C(Me)2- structure |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 1566. ± 5.4 | kJ/mol | IMRE | Fattahi, McCarthy, et al., 2003 | gas phase; Maybe be ring-opened HCC-C(Me)2- structure |
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 |
|---|---|---|---|
| 1.63 ± 0.15 | IMRB | Fattahi, McCarthy, et al., 2003 |
Protonation reactions
C5H7- + =
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1601. ± 5.9 | kJ/mol | G+TS | Fattahi, McCarthy, et al., 2003 | gas phase; Maybe be ring-opened HCC-C(Me)2- structure |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 1566. ± 5.4 | kJ/mol | IMRE | Fattahi, McCarthy, et al., 2003 | gas phase; Maybe be ring-opened HCC-C(Me)2- structure |
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.
Fattahi, McCarthy, et al., 2003
Fattahi, A.; McCarthy, R.E.; Ahmad, M.R.; Kass, S.R.,
Why does cyclopropene have the acidity of an acetylene but the bond energy of methane?,
J. Am. Chem. Soc., 2003, 125, 38, 11746-11750, https://doi.org/10.1021/ja035725s
. [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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