Binuclear transition metal complexes of bicompartmental SNO donor ligands: synthesis, characterization, and electrochemistry

Abstract

A series of new binucleating Co^II, Ni^II, Cu^II, and Zn^II complexes of bicompartmental ligands with SNO donors was prepared. The Schiff bases were obtained by the condensation of 4,6-diacetylresorcinol and mercapto-substituted 1,2,4-triazoles. The ligands and their complexes were characterized by elemental analysis, infrared, ¹H-NMR, UV-Vis, FAB-mass, and ESR spectral studies, magnetic susceptibility, and conductivity measurements. All the complexes were monomeric and binuclear. Ni^II and Co^II complexes were octahedral, whereas Cu^II and Zn^II complexes were square planar and tetrahedral, respectively. The compounds are investigated for electrochemical activity.

Keywords:

• 4,6-Diacetylresorcinol
• Triazole
• Schiff base
• Binuclear complex

Acknowledgements

The authors thank the Department of Chemistry and USIC, Karnatak University, Dharwad, for providing spectral and analytical facility. Recording of FAB mass spectra (CDRI, Lucknow) and ESR spectra (IIT, Bombay) are gratefully acknowledged. N.V. Kulkarni and M.P. Satisha thank Karnatak University, Dharwad, for providing the Nilekani and University Research Scholarship, and S. Budagumpi thanks the University Grant Commission for providing RFSMS.