Ph3C anion
- Formula: C19H15-
- Molecular weight: 243.3229
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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 |
|---|---|---|---|
| 1.56 ± 0.10 | D-EA | Taft and Bordwell, 1988 | |
| 2.55848 | IMRE | Bent, 1930 | Soln. equilibrium + solvation cycle |
| 0.758873 | SI | Gaines and Page, 1968 | From hexaphenylethane The Magnetron method, lacking mass analysis, is not considered relia |
Protonation reactions
C19H15- + =
By formula: C19H15- + H+ = C19H16
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 358.7 ± 2.2 | kcal/mol | G+TS | Taft and Bordwell, 1988 | gas phase |
| ΔrH° | 360.8 ± 2.5 | kcal/mol | G+TS | Bartmess | gas phase; value altered from reference due to change in acidity scale |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 350.7 ± 2.0 | kcal/mol | IMRE | Taft and Bordwell, 1988 | gas phase |
| ΔrG° | 352.8 ± 2.3 | kcal/mol | IMRE | Bartmess | gas phase; value altered from reference due to change in acidity scale |
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.
Taft and Bordwell, 1988
Taft, R.W.; Bordwell, F.G.,
Structural and Solvent Effects Evaluated from Acidities Measured in Dimethyl Sulfoxide and in the Gas Phase,
Acc. Chem. Res., 1988, 21, 12, 463, https://doi.org/10.1021/ar00156a005
. [all data]
Bent, 1930
Bent, H.E.,
The Electron Affinity of Triphenylmethyl,
J. Am. Chem. Soc., 1930, 52, 4, 1498, https://doi.org/10.1021/ja01367a030
. [all data]
Gaines and Page, 1968
Gaines, A.F.; Page, F.M.,
The Stabilities of Negative Ions.I. The Methyl-, Diphenylmethyl, and Triphenylmethyl Negative Ions,
Int. J. Mass Spectrom. Ion Phys., 1968, 1, 4-5, 315, https://doi.org/10.1016/0020-7381(68)85008-9
. [all data]
Bartmess
Bartmess, J.E.,
The Gas Phase Thermochemistry of Ph3C-, Ph3C., and Ph3C+, 32nd Ann. Conf. on Mass Spectrom. Allied Topics, San Antonio TX 27 May-1 June 1984. Abstracts p. 472. [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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