Bridging-ligand-facilitated intramolecular communication in homo- and heterobimetallic transition metal complexes of copper(I) and silver(I) as evidenced by cyclic voltammetry

Abstract

The electronic interaction between homo- and heterotransition metals of Group 11 in bimetallic complexes of the type [(R3P)M←NN→M'(R3P)](X)2 (R=C6H4CH2NMe2-2; M=M', M≠M', M=Cu, M'=Ag; NN=NC5H4CN-4, 1,4-(CN)2C6H4, 4,4'-bipy; X=ClO4, OTf, PF6), employing phosphanes as chelating ligands at the metal centers and various symmetric as well as asymmetric complexing molecules as bridging ligands between M and M', has been studied by cyclic voltammetry. Based on the shift of the reduction potentials of the metal atoms, various degrees of intramolecular electronic communication have been identified. They are correlated with the type, the symmetry and the molecular structure of the bridging ligand.