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 ML2Cl2 (M = Cu(II ), Mn(II), Ni(II)) and [ML3]Cl-3 (M = Fe(III), Cr(III)), L = N-4-methoxyphe nyl-N-4-chlorobenzoyl hydrazide are reported. In all the studied complexes the N-4-methoxyphenyl-N-4-chlorobenzoyl hydrazide acts as a neutral bidenta te chelating ligand with coordination involving the carbonyl oxygen and nit rogen atom of the secondary hydrazide group. The complexes appear to have a n 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 [CrL3]Cl-3 als o suggest the possibilities of magnetic dipole-dipole coupling interactions between Cr(III) ions. (C) 1999 Elsevier Science B.V. All rights reserved.