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

Abstract

A new bis-Schiff base N,N’-bis(4-bromosalicylidene)propane-1,2-diamine (H₂L) and its two copper(II) complexes, [CuL] (1) and [Cu₄Cl₂L₂(N₃)₂]·CH₃OH (2), have been prepared and characterized by spectroscopy methods, as well as single crystal X-ray diffraction. 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