الخلاصة
Abstract
The ligand of azo imidazole 2-[(4-Bromo phenyl)azo]-4,5- diphenyl imidazole (P-
BrPAI) have been prepared . Have also been prepared two chelate complexes by
reacting this ligand with the metal ionsNi(II),Cu(II). The preparation has been
conducted after fixing the optimum conditions of concentration and (pH).U.V-
visible spectra of these complexes solutions have been studied for a range of (pH)
and concentration which obey lampert-Beers Law.The structures of complexes are
deduced according to mole ratio method which were obtained from the
spectroscopic studies of the complex solutions .The ratios of metal: ligand obtained
are (1:2) for both complexes of Ni(II)and Cu(II)) ions.The stability of complexes in
solution were also studied at the optimum conditions.(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 ,this may indicate that coordination between the metal ions and our ligand
takes place.The conductivity measurements , Elemental analysis ,the percentage of
metal ions and the measurements of magnetic susceptibility of the complexes were
determined ,Depending on these results , in addition to, We may conclude that the
proposed geometrical structures of the complexes of Ni(II), Cu(II) |