Maleic anhydride anion
- Formula: C4H2O3-
- Molecular weight: 98.0574
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Gas phase 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
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -128.4 ± 2.3 | kcal/mol | R-EA | Paul and Kebarle, 1989 | ΔGea(423 K) = -32.8±1 kcal/mol, ΔS = -1±3 eu. |
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 as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
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Individual Reactions
C4H2O3- + = (C4H2O3- •
)
By formula: C4H2O3- + CH4O = (C4H2O3- • CH4O)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrG° | 4.7 ± 1.6 | kcal/mol | IMRE | Chowdhury, Grimsrud, et al., 1987 | gas phase; Free energy affinity at 70°C.; B |
Free energy of reaction
| ΔrG° (kcal/mol) | T (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 4.7 | 343. | PHPMS | Chowdhury, 1987 | gas phase; M |
C4H2O3- + = (C4H2O3- •
)
By formula: C4H2O3- + C2H6OS = (C4H2O3- • C2H6OS)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrG° | 6.7 ± 1.6 | kcal/mol | IMRE | Chowdhury, Grimsrud, et al., 1987 | gas phase; Free energy affinity at 70°C.; B |
Free energy of reaction
| ΔrG° (kcal/mol) | T (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 6.7 | 343. | PHPMS | Chowdhury, 1987 | gas phase; M |
C4H2O3- + = (C4H2O3- •
)
By formula: C4H2O3- + C2H3N = (C4H2O3- • C2H3N)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrG° | 5.5 ± 1.6 | kcal/mol | IMRE | Chowdhury, Grimsrud, et al., 1987 | gas phase; Free energy affinity at 70°C.; B |
References
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Paul and Kebarle, 1989
Paul, G.; Kebarle, P.,
Electron Affinities of Cyclic Unsaturated Dicarbonyls: Maleic Anhydrides, Maleimides, and Cyclopentendione,
J. Am. Chem. Soc., 1989, 111, 2, 464, https://doi.org/10.1021/ja00184a009
. [all data]
Chowdhury, Grimsrud, et al., 1987
Chowdhury, S.; Grimsrud, E.P.; Kebarle, P.,
Bonding of Charged Delocalized Anions to Protic and Dipolar Aprotic Solvent Molecules,
J. Phys. Chem., 1987, 91, 10, 2551, https://doi.org/10.1021/j100294a021
. [all data]
Chowdhury, 1987
Chowdhury, S. Grimsrud,
Bonding of Charge Delocalized Anions to Protic and Dipolar Aprotic Solvents,
J. Phys. Chem., 1987, 91, 10, 2551, https://doi.org/10.1021/j100294a021
. [all data]
Notes
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- Symbols used in this document:
T Temperature ΔfH°gas Enthalpy of formation of gas at standard conditions ΔrG° Free energy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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