Spectroscopic and magnetic investigations of some transition metal complexes with N-4-methoxyphenyl-N-4-chlorobenzoyl hydrazide as ligand

The preparation, spectroscopic and magnetic properties of ML(2)Cl(2) (M = Cu(II), Mn(II), Ni(II)) and [ML(3)]Cl(3) (M = Fe(III), Cr(III)), L = N-4-methoxyphenyl-N-4-chlorobenzoyl hydrazide are reported. In all the studied complexes the N-4-methoxyphenyl-N-4-chlorobenzoyl hydrazide acts as a neutral bidentate chelating ligand with coordination involving the carbonyl oxygen and nitrogen atom of the secondary hydrazide group. The complexes appear to have an pseudo-octahedral stereochemistry. ESR parameters (g(1) = 4.432, g(2) = 1.991, D = 0.096 cm(-1)) and mu(eff) = 3.55 mu g Obtained for [CrL(3)]Cl(3) also suggest the possibilities of magnetic dipole-dipole coupling interactions between Cr(III) ions. (C) 1999 Elsevier Science B.V. All rights reserved.