(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, [Ru₂^III(µ-O)(µ-CH₃COO)₂(HBpz₃)₂] (1) and [Ru₂^III(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, Ru₂^II↔Ru^IIRu^III↔Ru₂^III↔Ru^IIIRu^IV↔Ru₂^IV, coupled with protonation/deprotonation at the bridged monoatom.