Synthesis, X-ray crystal structures, and biological activity copper(II) and nickel(II) complexes derived from 5-bromo-2-((2-hydroxyethylimino)methyl)phenol

Abstract

The reaction of copper and nickel salts with the O,N-donor Schiff base 5-bromo-2-((2-hydroxyethylimino)methyl)phenol (HL) in methanol provides two new complexes [CuL2] (1) and [Ni2L2(N3)2(CH3OH)2]·CH3OH (2). The complexes have been characterized by analytical and spectroscopic measurements. The crystal structures of the complexes have been determined by X-ray crystallography. The Cu atom in the mononuclear complex 1 is in square planar coordination. The Ni atoms in the end-on azido bridged dinuclear complex 2 are octahedral coordination. The Schiff base ligands coordinate to the Cu and Ni atoms via NO and NOO donor sets, respectively. The antimicrobial activities of the complexes were assayed.