Synthesis And Spectroscopic Study of Groups IIb And IIIb Metal ions Complexes with New Azo Ligand 2-[(6-Nitro -2 _ benzo thiazolyl) azo]-hydroquinon ( 6 – NO2 BTAHQ)

Abstract

The new ligand 2-[(6-nitro - 2 benzo thiazolyl) azo]-hydroquinon (6-
NO2BTAHQ=LH2) was prepared by coupling reaction between (6-nitro-2-
benzothiazolyldiazonium) chloride with quinol in alkaline alcoholic solution.Six new
chelate complexes of Zn(II), Cd(II), Hg(II), Ga(III), In(III) and Tl(III) have been
synthesized. These complexes were prepared after fixing the optimum conditions of pH
and molar concentration by studying Uv-vis. Spectra of the solutions that mixing the
metal ions with the ligand solution in a wide ranges pH = 4.5-9.0 and molar
concentration that obeyed Lambert-Beer's law. The structures of the prepared
complexes have been characterized by using the molar ratio method for the metal:
ligand, which is (1:2), the ligand and its complexes were investgatal by using element
analysis, molar conductance measurement, stability constant (β ), Uv-vis., infrared
spectra and mass spectrum of the ligand. Atomic absorption, flame emission
spectrophotometer was used to determined the precents of metal ions in the prepared
complexes.