الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Literatur survy of the previous work canied on spectral and potential studies of different azo compounds
-The electronic spectral studies of azodyes under investigation in methanol and band assignment ,the electronic spectra of azodyes in some organic solvents of different polarities and variation of CT band position is interpreted and related to the microscopic solvent parameter . The spectral behaviour of the azodyes in universal buffer of different pH values is studied and the pKa values of these azodes are determined using four different spectrophotometic methods.
-The JR spectra of azodyes ninvestigation are discussed and their characteristic bands are assigned to cnesponding vibrational modes
-Studing the possipillty of complex formation in solution and its stoichiometry by using spectrophotometrically. These are resulted by studying each of the following: effect of pH, determination of Inax at which complex species absorb and stoichiometies of complexes. The
values of stability constants are also determined using spectrophotometric technique.
Validity to Beer,s law is studied.
Studying acid dissociation constants of the organic ligands and formation constants of the formed complexes at different temperatures and the same ionic stregthes 1 .0 M KC1 using
potentiometric technique where it is found that , at room temperature and ionic strength of 1.0 M KC1
-Affects the complexation process on studing the effect of temperature on the acid dissociation constants, it is found generally that they decrease with temperature increase,the fact which showthe spontaneous nature of the process.This is supported from the
values of standard free energy chang(AG)and enthalpy change(AH)where negative values are obtaind and negative values also for standard entropy change (AS) are obtained at room temperature and the same ionic strength of KC1 the formation constant of complexes
(iii)The electronic absorption spectra of the solid chelates are studies and the charactestic bands are determinned
(iv)The magnetic properties of the solid chelates.