pentadienide anion
- Formula: C5H7-
- Molecular weight: 67.1096
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Gas phase ion energetics 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
Electron affinity of neutral species
| EAneutral (eV) | Method | Reference | Comment |
|---|---|---|---|
| 0.910 ± 0.030 | PD | Zimmerman, Gygax, et al., 1978 | Acid: 1,4-pentadiene. (Z)-1,3-pentadiene is 7.0 kcal/mol more stable(weaker acid) |
Protonation reactions
C5H7- + =
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 369.2 ± 1.2 | kcal/mol | D-EA | Zimmerman, Gygax, et al., 1978 | gas phase; Acid: 1,4-pentadiene. (Z)-1,3-pentadiene is 7.0 kcal/mol more stable(weaker acid) |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 364.4 ± 1.9 | kcal/mol | H-TS | Zimmerman, Gygax, et al., 1978 | gas phase; Acid: 1,4-pentadiene. (Z)-1,3-pentadiene is 7.0 kcal/mol more stable(weaker acid) |
References
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Zimmerman, Gygax, et al., 1978
Zimmerman, A.H.; Gygax, R.; Brauman, J.I.,
Electron photodetachment spectroscopy of polyene anions. Electron affinities of pentadienyl and heptatrienyl radicals,
J. Am. Chem. Soc., 1978, 100, 5595. [all data]
Notes
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- 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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