Rate constants for the solution and electrode electron-transfer to substituted bromobenzenes in DMF

Abstract

The rate constants k set for the solution electron-transfer between radical anions of chrysene and a series of substituted bromobenzenes have been obtained using homogeneous redox catalysis. Linear correlation of log k set versus the Hammett substituent constants has been found and used to estimate formal potentials. The heterogeneous standard rate constant, calculated from voltammetric peak potentials, is independent of the substituent in agreement with the Marcus-Hush model.