Synthesis and Spectroscopic Studies of Cobalt(II) and Copper(II) Complex Compounds with 4‐Methoxybenzaldehyde‐N‐[4‐(4′‐chlorophenylenesulfonyl)benzoyl]hydrazone

Abstract

New complex compounds of Co(II) and Cu(II) with 4‐methoxybenzaldehyde‐N‐[4‐(4′‐chlorophenylenesulfonyl)benzoyl]hydrazone (HL) have been prepared and characterized by elemental and thermogravimetrical analyses, magnetic susceptibility measurements, infrared, electronic and EPR spectra. The ligand coordinates in either the keto or the enol form, depending on the experimental conditions. Cobalt acetate gives a monomeric, distorted‐octahedral compound, while cobalt chloride forms a monomeric penta‐coordinate complex. Copper acetate and copper chloride form dimeric complexes, a monomeric compound having been obtained from copper bromide.

Acknowledgment

We thank Mrs. Rodica Georgescu, Atomic Physics Institute, for recording EPR spectra of Cu(II) complexes.