Synthesis, Structures, and Antimicrobial Studies of Cobalt(III) Complexes with Tridentate Schiff Bases

Abstract

Two new cobalt(III) complexes, [Co₂(L¹)₂(AEN)(N₃)] (1) and [Co(L²)(PEA)(N₃)] (2) (L¹ = 2-[1-(2-hydroxyethylimino) ethyl]phenolate, L² = 2-[1-(2-phenylaminoethylimino)ethyl] phenolate, AEN = 2-aminoethanolate, PEA = N-phenylethane-1,2-diamine), have been prepared and characterized by elemental analysis and infrared spectroscopy. The structures of the complexes have been determined by X-ray crystallography. The coordination geometry around cobalt atoms in both complexes is distorted octahedral with one tridentate Schiff base ligand, one bidentate ligand, and one monodentate azide ligand. The antimicrobial activity of the complexes was studied.

Keywords:

• antimicrobial
• cobalt complex
• crystal structure
• Schiff base
• synthesis

Acknowledgments

This project was supported by the Natural Scientific Research Foundation of the Higher Education Institutions of Anhui Province, China (Grant No. KJ2009A008). The authors also thank the support from Professor Yang-Zhong Liu (University of Science and Technology of China).