Studies on N-(2-Thienylmethylidene)-2-aminothiophenol Complexes of Co(II), Ni(II) and Cu(II)

Abstract

Metal complexes ML₂ and ML₂Cl₂, where M is Co(II), N(II), Cu(II) and L is Schiff base formed by condensation of 2-thiophenecarboxaldehyde and 2-aminothiophenol, N-(2-thienylmethylidene)-2-aminothiophenol (TNATPh), have been prepared and characterized by elemental analysis, magnetic and spectroscopic measurements. IR and NMR spectra show that the nitrogen of the azomethine group and sulphur of the thiophene ring take part in coordination in the ML₂Cl₂ complexes while in the ML₂ compounds the ligands act as tridentate coordinating through azomethine nitrogen and both sulphur atoms. Magnetic, ESR and electronic spectral studies show a distorted octahedral structure for the ML₂ and CoL₂Cl₂ complexes and a square-planar geometry for Ni(TNATPh)₂Cl₂ and Cu(TNATPh)₂Cl₂ complexes.