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

Abstract

A novel unsymmetrical tetradentate azine, 2-acetylpyridinesalicylaldazine (Haps), was prepared by condensing salicylhydrazone with 2-acetylpyridine, and was characterized by elemental analysis and its i.r. spectrum. 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 MCl2 gave homo- [ZnCl2Zn(aps)2(H2O)2] and heterobinuclear [MCl2Zn(aps)2(H2O)2] type azine-bridged complexes, which were characterized by analytical, molecular weight, conductivity (solid and solution), magnetic susceptibility, and electronic, e.s.r. and i.r. spectroscopies, and X-ray powder diffraction data. © 1996 Chapman & Hall.