Abstract
Abstract A novel bi-heterocyclic azo derivative is synthesized by the diazo-coupling reaction of 2-amino-3-carbethoxy-4,5-dimethylthiophene and 2-amino-4-phenylthiazole and its ligational behaviour towards Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) salts is investigated. The complexes are characterized on the basis of elemental analyses, molar conductance, magnetic susceptibility measurements, UV-Visible, IR and 1H NMR spectral data. Spectral data have indicated that the ligand is coordinated to the metal ion in a neutral bidentate manner. On the basis of electronic spectral data and magnetic susceptibility measurements, suitable geometry is proposed for each complex. Thermogravimetric studies of copper(II) complex are used to characterize the complex. The dyeing performance of the azo derivative and its metal complexes is examined on silk fabric. The corrosion inhibition efficiency of the ligand and its metal complex in 0.5 M H2SO4 for mild steel coupons is monitored by weight-loss and open circuit potential measurements .
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