Preparation and characterization of new azo Ligand with matel ions [Mn+2,Fe+2, Co+2, Ni+2, Cu+2, Zn+2, Cd+2and Hg+2]
journal of kerbala university,
2011, Volume 7, Issue 2, Pages 1-17
AbstractThis study included the preparation of the new Ligand 2-[(3-Carboxy-4-hydroxy phenyl) azo]-4,5-diphenyl imidazole (CHPAI) by reacting adiazonium salt solution of amino compound 5- amino salicylic acide with 4,5-diphenyl imidazole in alkaline . eight complexes have been prepared by reacting this ligand with the following ions [Mn(II), Fe(II), Co(ІІ), Ni(ІІ), Cu(ІІ) ,Zn (ІІ),Cd(II) and Hg(II)] .
Identify this ligand and complexes by C.H.N analysis to some of this complexes ,Uv-Visible spectra and infrared spectra. Uv-Visible spectra shows solution in ethanol red shift showed in Visible spectra of all complexes . The infrared spectra of them were also studied .They show obvious changes with the ligand spectrum . New bands have been appeared which are not existed in the ligand spectra this was due to the combination of the metal ions with the donating atoms in the ligand .On the other hand ,other bands showed changes in the shape; position and intensity which is an evidence that a process of coordination had happened between the studied metal ions and the ligand. The conductivity measurements have shown non ionic characters of all complexes in ethanol solution .The magnetic susceptibility of the metal ions was also measured showing that the complexes of the [Mn(II), Fe(II) , Co(ІІ), Ni(ІІ) and Cu(ІІ)] ions are paramagnetic while the [Zn(II), Cd(ІІ) and Hg(ІІ)] were diamagnetic.
From the above observations, the geometrical structure of all complexes was octahedral
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