A NEW ROUTE TO BIMETALLIC AZINE-BRIDGED COMPLEXES - SYNTHESIS AND CHARACTERIZATION OF MONONUCLEAR (MN,CO,NI,CU,ZN), HOMOBINUCLEAR (ZN-ZN) AND HETEROBINUCLEAR (MN-ZN, CO-ZN, NI-ZN, CU-ZN) AZINE-BRIDGED COMPLEXES

A novel unsymmetrical tetradentate azine, 2-acetylpyridinesalicylaldaz ine (Haps), was prepared by condensing salicylhydrazone with 2-acetylp yridine, and was characterized by elemental analysis and its i.r. spec trum. This ligand reacted with Mn, Co, Ni, Cu and Zn acetates to yield deprotonated M(aps)(2)(H2O)(2) complexes. Subsequent reaction of the mononuclear unit Zn(aps)(2)(H2O)(2) with MCl(2) gave home-[ZnCl2Zn(aps )(2)(H2O)(2)] and heterobinuclear [MCl(2)Zn(aps)(2)(H2O)(2)] type azin e-bridged complexes, which were characterized by analytical, molecular weight, conductivity (solid and solution), magnetic susceptibility, a nd electronic, e.s.r. and i.r. spectroscopies, and X-ray powder diffra ction data.