Role of bridging ligand .pi.-acidity in determining the nature of the lowest excited states of binuclear complexes of nickel(0). Ligand-centered (M2 .fwdarw. .mu.-LCT), metal-centered (.mu.-L .fwdarw. M2CT), and intraligand (IL) lowest excited states for the series of complexes Ni2(.mu.-L)(CNMe)2(PPh2CH2PPh2)2 (L = CNR, CNMe(R)+, NO+)

Abstract

The spectroscopy and photochemistry of the series of binuclear Ni(0) complexes Ni 2 (μ-L)(CNMe) 2 (dppm) 2 (dppm=bis(diphenylphosphino) methane) with either bridging isocyanide ligands, bridging aminocarbyne ligands or bridging NO + , have been examined