HCðCCðC anion
- Formula: C4H-
- Molecular weight: 49.0513
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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 |
|---|---|---|---|
| 3.561 ± 0.010 | LPD | Pino, Tulej, et al., 2002 | |
| 3.558 ± 0.015 | LPES | Taylor, Xu, et al., 1998 |
Protonation reactions
C4H- + =
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 360.3 ± 3.2 | kcal/mol | D-EA | Pino, Tulej, et al., 2002 | gas phase |
| ΔrH° | 360.4 ± 2.9 | kcal/mol | Endo | Shi and Ervin, 2000 | gas phase |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 352.1 ± 3.3 | kcal/mol | H-TS | Pino, Tulej, et al., 2002 | gas phase |
| ΔrG° | 352.2 ± 3.0 | kcal/mol | H-TS | Shi and Ervin, 2000 | gas phase |
References
Go To: Top, 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.
Pino, Tulej, et al., 2002
Pino, T.; Tulej, M.; Guthe, F.; Pachkov, M.; Maier, J.P.,
Photodetachment spectroscopy of the C2nH- (n=2-4) anions in the vicinity of their electron detachment threshold,
J. Chem. Phys., 2002, 116, 14, 6126-6131, https://doi.org/10.1063/1.1451248
. [all data]
Taylor, Xu, et al., 1998
Taylor, T.R.; Xu, C.S.; Neumark, D.M.,
Photoelectron spectra of the C2nH- (n=1-4) and C2nD- (n=1-3) anions,
J. Chem. Phys., 1998, 108, 24, 10018-10026, https://doi.org/10.1063/1.476462
. [all data]
Shi and Ervin, 2000
Shi, Y.; Ervin, K.M.,
Gas-phase acidity and C-H bond energy of diacetylene,
Chem. Phys. Lett., 2000, 318, 1-3, 149-154, https://doi.org/10.1016/S0009-2614(00)00023-3
. [all data]
Notes
Go To: Top, 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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