CH2=C(OMe)O anion
- Formula: C3H5O2-
- Molecular weight: 73.0711
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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 |
|---|---|---|---|
| 1.800 ± 0.061 | PD | Zimmerman, Reed, et al., 1977 |
Protonation reactions
C3H5O2- + =
By formula: C3H5O2- + H+ = C3H6O2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 371.8 ± 2.1 | kcal/mol | G+TS | Bartmess, Scott, et al., 1979 | gas phase; value altered from reference due to change in acidity scale |
| ΔrH° | 371.8 ± 3.7 | kcal/mol | D-EA | Zimmerman, Reed, et al., 1977 | gas phase |
| ΔrH° | 375.9 ± 3.5 | kcal/mol | EIAE | Pariat and Allan, 1991 | gas phase; From CH3CO2Me |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 365.1 ± 2.0 | kcal/mol | IMRE | Bartmess, Scott, et al., 1979 | 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.
Zimmerman, Reed, et al., 1977
Zimmerman, A.H.; Reed, K.J.; Brauman, J.I.,
Photodetachment of electrons from enolate anions. Gas phase electron affinities of enolate radicals,
J. Am. Chem. Soc., 1977, 99, 7203. [all data]
Bartmess, Scott, et al., 1979
Bartmess, J.E.; Scott, J.A.; McIver, R.T., Jr.,
The gas phase acidity scale from methanol to phenol,
J. Am. Chem. Soc., 1979, 101, 6047. [all data]
Pariat and Allan, 1991
Pariat, Y.; Allan, M.,
Dissociative Attachment to Methyl Acetate: Evidence for Ion/Molecule Complexes as Intermediates,
Int. J. Mass Spectrom. Ion Proc., 1991, 103, 2-3, 181, https://doi.org/10.1016/0168-1176(91)80088-5
. [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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