Ph3C anion
- Formula: C19H15-
- Molecular weight: 243.3229
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Reaction thermochemistry data
Go To: Top, Gas phase ion energetics 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
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Individual 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 |
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 |
|---|---|---|---|
| 1.56 ± 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, 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.
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]
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]
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]
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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