Synthesis, Crystal Structure and Antimicrobial Activity of A Linear Trinuclear Nickel(II) Complex with Schiff Base Ligand

摘要

A new linear trinuclear Schiff base nickel(II) complex, [Ni{NiL( μ 2 - η 1 : η 1 -OAc)(OH 2 )} 2 ]·H 2 O, where L is the dianionic form of N,N’ -bis(5-chloro-2-hydroxybenzylidene)-1,3-propanediamine (H 2 L), was synthesized and characterized by elemental analyses, IR spectroscopy, and X-ray single-crystal determination. There are three bridges across the Ni-Ni atom pairs, involving two phenolate O atoms of a Schiff base ligand, and an O–C–O moiety of a μ 2 - η 1 : η 1 -OAc group. The Ni atoms have octahedral coordination. The acetate bridges linking the central and terminal nickel atoms are mutually trans . The adjacent Ni???Ni distances are 3.047(1) ?. The complex was evaluated for its antibacterial ( Bacillus subtilis , Staphylococcus aureus , Escherichia coli , and Pseudomonas aeruginosa ) and antifungal ( Candida albicans and Aspergillus niger ) activities by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) method.