(μ-Oxo or hydroxo)bis(μ-carboxylato)diruthenium(III) complexes with tris(1-pyrazolyl)borate face-capping ligand, affording versatile oxidation states via a protonation/deprotonation couple

Abstract

(µ-Oxo or µ-hydroxo)bis(µ-acetate)diruthenium(III) complexes with tris(1-pyrazolyl)borate, [Ru2III(µ-O)(µ-CH3COO)2(HBpz3)2] (1) and [Ru2III(µ-OH)(µ-CH3COO)2(HBpz3)2](PF6) (2), have been prepared and characterized by X-ray crystallography, and showed a wide range of redox processes, Ru2II↔RuIIRuIII↔Ru2III↔RuIIIRuIV↔Ru2IV, coupled with protonation/deprotonation at the bridged monoatom.