Synthesis and studies of some bivalent transition metal complexes with acylhydrazones

Abstract

Complexes of 3-hydroxy-2-naphthaldehyde benzylhydrazone (H2nabh) and 3-hydroxy-2-naphthaldehyde salicyloylhydrazone (H3nash) of the empirical composition M(L2H)·nH2O [M = manganese(II), iron(II), cobalt(II), nickel(II), copper(II), zinc(II), cadmium(II), mercury(II), L = H2nabh, H3nash and n = 0, 1, 2] were prepared and characterized by elemental analyses, magnetic susceptibility, electronic and infrared spectral data. Zinc(II) and cadmium(II) complexes were also studied by 13C, 1H NMR and the Cu(nabh)·H2O complex by transmission electron microscopy. The complexes are coloured and highly insoluble in common organic solvents. Absence of the original anion in the complexes indicates deprotonation of the ligands (H2nabh and H3nash) which bind the metal ions from the OH and the CN groups. © 1987.