Metal complexes with terminal dicyanomethylenecarbene ligands formed by chlorine migration reactions
Abstract
Reactions of the 1-chloro-2,2-dicyanovinyl derivatives (NC)2CC(Cl)M(CO)3C5H5(M = Mo and W) with trivalent phosphorus and related ligands result in migration of chlorine from carbon to the transition metal to give products of the type C5H5ML2[CC(CN)2]Cl [M = Mo and W; L = Ph3P, Ph3As, Ph3Sb, (MeO)3P, (EtO)3P, and (PhO)3P] containing a terminal dicyanomethylenecarbene ligand.