Preparation, Characterization and Theoretical Studies of Cobalt(II), Nickel(II) and Cupper(II) complexes of bisazo ligand derived from 4,5-diphenyl imidazole and m-Phenylenediamine

Muthanna Journal of Pure Sciences
Volume 3 issue 1, 2016

Ahmed Razzaq Ibrahim
Department of Chemistry, College of Science, University of Muthanna
E-mail: 07803465379




Transition metal complexes of Co(II), Ni(II) and Cu(II) with a new bisazo ligand 1,3-Bis (4,5-diphenyl imidazole azo) benzene (BABI) derived from m-phenylenediamine and 4,5-diphenyl imidazole were synthesized. The preparation of the complexes have been conducted after fixing the optimum conditions such as pH and concentration. UV- visible spectra of these complexes solution have been studied for a range of pH and concentration which obey Lampert-Beers Law.  The structure of complexes are deduced according to mole ratio method which were obtained from the spectroscopic studies of the complexes solution .The ratios of metal: ligand obtained are (1:1) for these complexes. (UV-Vis) absorption spectra of ethanolic solution of complexes showed bathchromic shift, as compared with that of free ligand. The infrared spectra of the chelating complexes have been studied. Depending on these results the coordination between our ligand and the metal ions take place. The conductivity measurements, elemental analysis ,the percentage of metal ions was determined. Depending on these results ,we may conclude that the ligand was tetradentate . Also the proposed geometrical structure of the complexes of Co(II), Ni(II) and Cu(II) ions are octahedral.

Keywords: Preparation, Theoretical Treatment, Bis (imidazole azo) ligand, Elemental analysis

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