Characterisation of the kinetic intermediate of the inner-sphere electron-transfer reaction involving hexa-aquotitanium(III) cation and di-µ-acetato-diaquodi-µ-oxalato-diruthenium(II,III) anion

Abstract

A long-lived intermediate (formation constant 8 × 10²dm³ mol^–1) is involved in the reduction (25 °C, 1M LiO₃SCF₃) of di-µ-acetato-diaquodi-µ-oxalato-diruthenium(II,III) anion by hexa-aquotitanium(II) cation; the rate constant for intramolecular electron transfer within the conjugate base of the trinuclear intermediate is 30 s^–1(enthalpy of activation, 58 kJ mol^–1).