1H-Pyrrole-2,5-dione


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 determinations

EA (eV) Method Reference Comment
1.153 ± 0.087TDEqPaul and Kebarle, 1989ΔGea(423 K) = -26.2±1 kcal/mol, ΔS = -1±3 eu

De-protonation reactions

C4H2NO2- + Hydrogen cation = 1H-Pyrrole-2,5-dione

By formula: C4H2NO2- + H+ = C4H3NO2

Quantity Value Units Method Reference Comment
Δr325.1 ± 4.6kcal/molEIAECooper and Compton, 1973gas phase; From maleimide. G3MP2B3 calculations indicate a dHacid = 342 kcal/mol
Quantity Value Units Method Reference Comment
Δr317.3 ± 4.9kcal/molH-TSCooper and Compton, 1973gas phase; From maleimide. G3MP2B3 calculations indicate a dHacid = 342 kcal/mol

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]

Cooper and Compton, 1973
Cooper, C.D.; Compton, R.N., Electron attachment and cesium collisional ionization studies of tetrafluorosuccinic and hexafluoroglutaric anhydrides: Molecular electron affinities, J. Chem. Phys., 1973, 59, 3550. [all data]


Notes

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