Spectroscopy, structure, and electrochemistry of transition metal complexes having [M₂N₂OS₂] coordination sphere

Abstract

Binuclear transition metal complexes of bicompartmental SNONS donors were synthesized and characterized by various physico-chemical techniques. Two different precursors with chloromethyl/formyl functionality at the 2 and 6 positions of phenolate ring are used to construct the ligands. The quinoxaline scaffolds provide SN donors incorporated at the 2 and 6 positions. Copper and zinc complexes are square pyramidal, whereas nickel and cobalt complexes are octahedral. The influence of two metal centers in terms of cooperative effect on the electronic, magnetic, electrochemical, and structural properties was investigated.

Keywords:

• 2,6-Bis-(chloromethyl)-4-methylphenol
• 2,6-Diformyl-4-methylphenol
• 3-Hydrazinylquinoxaline-2-thione
• Bicompartmental ligand
• Electrochemistry

Acknowledgments

The authors thank Department of Chemistry and USIC, Karnatak University, Dharwad for providing spectral and analytical facility. Recording of FAB mass spectra (CDRI Lucknow) is gratefully acknowledged. The authors Naveen Kulkarni and Srinivasa Budagumpi thank Karnatak University, Dharwad and UGC, New Delhi for the Nilekani Scholarship and RFSMS.