الفهرس 
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Abstract
The present thesis comprises three chapters. The first one included the introduction, which summarized the importance of the compound under investigation and literature survey to both the quinoline and azo compounds and finally the theoretical background.
The second chapter is concerned with the experimental part, which deals with the material, preparation of various ligands and complexes, solution, instruments, working procedures and methods used for calculation.
The third chapter is devoted to the results and discussions and divided into four parts.
Part 1
A series of quinoline azodyes (HLI-HLVI) has been prepared and characterized by elemental analyses, 1H NMR, and IR spectra. The IR spectral data indicate that, the compounds can exist in two resonance structures. Proton-ligand dissociation constants of quinoline azodyes and their substituted derivatives, and metal-ligand stability constants of their complexes with bivalent (Co2+, Ni2+, Cu2+, La3+, UO22+, and Th4+) metal ions have been determined potentiometrically in 0.1 M KC1 and 40% (v/v) EtOH-water mixture. The influence of substituents on the dissociation and stability constants was examined on the basis of the electron repelling property of the substitiuent order of the stability constants of the formed complexes was found to be Co2+> Ni2+ > Cu2+ > La3+ > UO22+> Th4+. The effect of temperature was studied and the corresponding thermodynamic parameters (ΔG, ΔH and ΔS) were derived and discussed.
Part 2
The effect of substituents, solvent, polarities and hydrogen ion concentration on the electronic structure and spectrum of some azo compound derived from 8-hydroxyquinoline and aromatic amines have been investigated. The main visible band appearing in the spectra in all the studied compound (380-404) is assigned to electronic transitions within the whole molecule of such compounds as an intermolecular charge transfer (CT) transitions, and the red shift substituents or as the result of polar solvent. The possibilities of solute-solvent interaction were discussed. Further more, the acidity constant values of the compounds have been determined and discussed as a function of the geometric of the substituents.
Part 3
New polymeric complexes of Cu(II), Co(II), Ni(II) and UO2(II) with 5-(2-carboxyphenylazo)-8-hydroxyquinoline (LH2) have been prepared and characterized on the basis of analytical, magnetic, 1H NMR, EPR and electronic spectral studies. Tentative structures for the polymeric complexes are proposed. The important IR bands and the main 1H NMR signals are assigned and discussed relative to the molecular structure. EPR spectrum of Copper(II) complex has been studied with a view to assigning their stereochemistries. Various EPR parameters have been calculated. Each metal is six-coordinate in an octahedral environment. The ligand acts as a dibasic (bis-bidentate chelating agent coordinating through CN, N=N, COOH and OH groups by replacement of a proton from the two latter groups. Considerable interest has also been focused on the synthesis of the azo compound and its polymeric metal complex due to its wide potential applications. The thermal decomposition behaviour of the complexes is also discussed.
Part 4
Detailed analysis of the electronic structure and properties of quinoline derivatives is presented. The aim of the present investigation is to pinpoint the electronic structural similarities and differences, among the series of the studied quinoline that govern their acidic and coordinative properties. The geometries of the studied quinoline were fully optimized at the level of AMI semi-imperical method. Relative stabilities of derivatives have been calculated.