Preparation and spectral Characterization of Some Transition Metal Complexes With New Azo Ligand 2-[(4-Quinaldine)Azo] – imidazole (QdAIm)
journal of al-qadisiyah for pure science(quarterly),
2007, Volume 7, Issue 3, Pages 134-146
AbstractNew heterocyclic azo imidazole dye ligand 2-[(4-Quinaldine)Azo]–imidazole (QdAIm), was prepared by reacting a dizonium salt solution of 4– amino quinaldine with imidazole in alkaline aqueous solution. Six complexes with Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II) were prepared and characterized by elemental analysis, spectroscopic by infrared, electronic spectra, magnetic susceptibility and molar conductance measurements. The atomic absorption/flame emission – spectrophotometer was used to specify the precents of metal ion in the prepared complexes. The stability constant of prepared complexes have been determined by spectrophotometric method. The stability of complexes follows the sequence; Cd(II) > Cu(II) > Co(II) > Hg(II) > Zn(II) > Ni(II).
The isolated complexes are found to have the general formula [ML2Cl2].xH2O , M=Co(II), Cu(II), Hg(II), X=1, M= Ni(II), Zn(II), Cd(II), (X=0). The analytical data show that the metal to ligand ratio in all complexes are (1:2).
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