Synthesis and spectral properties studies of novel hetrocyclic mono azo dye derived from thiazole and pyridine with some transition complexes

Abstract

A novel hetrocyclic mono azo dye ligand 5-[2-(5-nitro thiazolyl)azo]-2-amino-4-methyl pyridine (NTAPy) was prepared by coupling reaction between 5-nitro thiazole diazonium chloride with 2-amino-4-methyl pyridine in alkaline alcoholic solution . Anew series of some transition metal complexes of Cr(III), Mn(II), Fe(III), Co(II), Ni(II), Cu(II) and Zn(II) ions were prepared forming seven chelate complexes . The prepared hetrocyclic mono azo dye ligand and its metal complexes were checked by different spectral technique such as 1H-NMR, 13C-NMR,FT-IR, electronic spectra, mass spectrum, C.H.N analysis, magnetic susceptibility, atomic absorption and molar conductivity. The analytical data show that the metal to ligand ratio [M:L] in all complexes are[1:2] and the mono azo ligand behavior as a bidentate chelating agent. The coordination number of all metal ions is found to be six in coordination through the nitrogen atom of azo group (N3) farthest of thiazole ring and nitrogen atom (N3) of thiazole molecule forming five member metlo –ring. All metal complexes of non- electrolytic and no conductive species exist excepted the Cr(III)and Fe(III)complexes are 1:1 electrolyte.