Synthesis, Characterization and X-Ray Crystal Structures of Schiff Base Cadmium(II) and Nickel(II) Complexes with Antibacterial Activity
摘要
Two isostructural mononuclear cadmium(II) and nickel(II) complexes [Cd(HL)2(NCS)2]∙4CH3OH (1) and [Ni(HL)2(NCS)2]∙4CH3OH (2), where HL is the zwitterionic form of the Schiff base 2,4-difluoro-6-[(2-pyrrolidin-1-ylethylimino)methyl]phenol (HL), were prepared and characterized by elemental analysis, infrared and electronic spectroscopy, as well as X-ray single crystal determination. In both complexes the metal atoms are in octahedral coordination. The Schiff base ligands are coordinate to the metal atoms through phenolate oxygen and imino nitrogen. Molecules of the complexes are stabilized by hydrogen bonds. The biological assay indicates that the complexes have good antimicrobial activities on the bacteria strains Escherichia coli, Pseudomonas aeruginosa, Salmonella typhi and Staphylococcus aureus.