Synthesis of chelating bidentate isocyano and cyano ligands and their metal complexes

Molecular models indicate that they should chelate to metals with the donor groups at 90° with respect to each other. From reactions of the diisocyano ligand DiNC, the following complexes with chelating DiNC ligands have been isolated: Cr(CO),(DiNC), Mo(CO),(DiNC), W(CO),(DiNC), MII(CO)~(D~NC)B~, CpFe(CO)(DiNC)+, and CpFe(CS)(DiNC)+. The characterization of these complexes demonstrates that DiNC can function as a chelating ligand despite its formation of a 13-member chelate ring.