Slow intramolecular electron transfer in a ruthenium(III)-titanium(III) redox intermediate having a dianion derived from a dihydroxyquinone as bridging ligand

Abstract

Slow intramolecular electron transfer (ET) has been observed in the binuclear intermodiate of a Ti(III)-Ru(III) rodox reaction that involves a dianion derived from a dihydroxyquinone as bridging ligand; this indicates that this ligand provides small but significant cross-bridge Ru(III)-Ti(III) electronic interaction. A Ti(III)-Co(III) reaction with a similar bridging-ligand follows a different intimate mechanism.