Syntheses, Crystal Structures and Antimicrobial Activity of Copper(II) Complexes with the Ligand N,N’-Bis(4-bromosalicylidene)propane-1,2-diamine

Abstract

Two new copper(II) complexes, [CuL] (1) and [Cu4Cl2L2(N3)2]·CH3OH (2), derived from the bis-Schiff base N,N’-bis(4-bromosalicylidene)propane-1,2-diamine (H2L) have been prepared and characterized by spectroscopy methods, as well as single crystal X-ray determination. The Cu atom in the mononuclear complex 1 is in square planar coordination. The outer and inner Cu atoms in the phenolate and azide co-bridged tetranuclear complex 2 are in square planar and square pyramidal coordination, respectively. The antibacterial activities of the Schiff base and the two copper complexes have been assayed on the bacteria Staphylococcus aureus and Escherichia coli, and the yeast Candida parapsilosis.