Synthesis, Spectral, and Antimicrobial Studies of Nickel(II) Complexes With Nitrogen-Containing Ligands

Abstract

Some nickel(II) complexes of 1,10-phenanthroline and 2,2′-bipyridine, associated with counterions such as Cl⁻, NO₃⁻, OAc⁻, and SO₄²⁻ have been synthesized and characterized by elemental analysis, conductance, spectral measurements, and antimicrobial studies. The conductance measurement indicates that [Ni(bipy)₂H₂O(NO₃)](NO₃), [Ni(phen)₂(H₂O)Cl]Cl·3H₂O·CH₃OH and [Ni(phen)₃](NO₃)₂.4H₂O are 1:1 and 1:2 electrolytes, respectively. The infrared and electronic spectral studies are consistent with the adoption of probable six-coordinate octahedral geometry for the complexes. The microbiostatic activity revealed that all the complexes showed pronounced activity against the tested fungi but little or no antibacterial activity. A six-coordinate octahedral geometry was established for [Ni(phen)₂(H₂O)Cl]Cl·3H₂O·CH₃OH using X-ray crystallography.

Keywords:

• elemental analysis
• conductance
• spectral measurements
• antimicrobial studies
• X-ray

Acknowledgment

F. Capitelli thanks Mr. G. Chita (Institute of Crystallography, Bari, Italy) for X-ray data collection.

Supplementary Material

Crystallographic data (excluding structure factors) for the structures in this paper have been deposited with the Cambridge Crystallographic Data Centre as supplementary publications no. CCDC-935183. Copies of available material can be obtained, free of charge, on application to CCDC, 12 Union Road, Cambridge CB2 1EZ, UK (fax: [phone] or e-mail: [email protected] mailto:[email protected]