ELECTRONIC COUPLING BETWEEN REMOTE METAL CENTERS IN CYANO-BRIDGED POLYNUCLEAR COMPLEXES

Several cyanide-bridged polynuclear complexes have been synthesized in the context of intramolecular energy and electron transfer studies. A valence-localized description is generally appropriate for such compl exes. Within such a localized picture, however, the cyanide bridge is found to provide a remarkable degree of metal-metal electronic couplin g. This conclusion can be drawn from a variety of experimental results . Specific attention is devoted here to the spectroscopic observation of appreciable second-order interactions between remote (i.e., non dir ectly bridged) sites in a polynuclear complex.