Thermodynamics of semiquinone disproportionation in aqueous buffer

AE Alegría, M López, N Guevara

Index: Alegria, Antonio E.; Lopez, Marcos; Guevara, Norberto Journal of the Chemical Society - Faraday Transactions, 1996 , vol. 92, # 24 p. 4965 - 4968

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Citation Number: 21

Abstract

The thermodynamic parameters, Kdisp, ΔH° and ΔS°, controlling the disproportionation of semiquinones derived from 1, 4-benzoquinone (BQ), 1, 4-naphthoquinone (NQ), 2- methylbenzoquinone (MBQ), menadione (MNQ), naphthazarin (NZQ) and quinizarin (QNZ), have been determined. Smaller disproportionation constants, Kdisp, are observed upon addition of a fused benzene ring to the semiquinone structure. Negative enthalpies and ...

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