Electronic Interactions Between and Through Covalently-Bonded Polymetallic Complexes

The diverse structures and rich electrochemical response of polynuclear complexes have made them attractive objects with which to study bridge-mediated electronic interactions. In this review, the role of polymetallic systems as both electro-active sites (electrophores) in (cluster) bridge (cluster) systems, and bridging elements in {M}-{cluster}-{M} structures (M = organoMetallic fragment) has been reviewed. Methods for the characterisation of bridge-mediated charge transfer processes are highlighted, and where possible mechanisms of interaction are identified in specific systems.