Redox behaviour of the oxo-bridged diruthenium(III) complex, [Ru2(µ-O)(µ-MeCO2)2(bpy)2(mim)2]2+ in acetonitrile in the presence of various proton donors (bpy = 2, 2′-bipyridine, mim = 1-methylimidazole)

Abstract

Redox potentials of the Ru₂^III,III–Ru₂^III,II and Ru₂^III,II–Ru₂^II,II processes of [Ru₂(µ-O)(µ-MeCO₂)₂(bpy)(mim)₂]²⁺ in acetonitrile, move to the positive direction remarkably on addition of a strong acid such as toluene-p-sulfonic acid, while two processes are coalesced to show apparent one-step two-electron reduction on addition of weaker proton donors.