pentadienide 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° | 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) |
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 |
|---|---|---|---|
| 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
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.
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
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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