Electronic structure of thioether containing NSNO donor azo-ligand and its copper(II) complex: Experimental and theoretical studies

Synthesis of thioether containing NSNO donor azo ligand (HL) showing hydrazoketo and azoenol tautomerism has been carried out. The hydrazoketo form of HL is predominating over azoenol form. In copper(II) complex the ligand is present as azoenol form. The electronic spectra and electronic structure of the complex has been extensively studied. The structures of the ligand and copper(II) complex have been established from single crystal X-ray studies. The 1-D supramolecular structure of the complex is formed by π-π interactions.