الفهرس 
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Abstract
The thesis entitled ”Physico-chelnical studies of some organic compounds and its complexes” comprises three main chapters: The first chapter contains the different methods of the formation and preparation of metal polymer complexes. A literature seurvey included the importance and structural chemistry of polymer compounds and their complexes. The second chapter describes the preperation of organic compounds in monomeric forms(L1-L4) which used in potentiometric studies. Azopolymer complexes were prepared by the reaction of azo compounds (L5-L9) with uranyl acetate and/or malonyldihydrazide. The elemental analyses, materials and techniques were included. The electrical conductivities of the uranyl azopolymer complexes (PL6, PL8 and PL9) were obtained in the solid state using compressed pellets, 14 mm in diameter and 1 mm thick. The third chapter comprises the results obtained showed characteristic data consistent with the assumed potentiometery and molecular structures of the uranyl azopolymer complexes and their discussion. It consists of four parts: The first part includes the potentiometeric studies of Ll, L2, L3 andL4 in monomeric and polymeric forms. The dissociation constants (pKH) were obtained by the titration of the compounds (L1-L4) in the appropiate solvent-water mixture with NaOH at different temperatures (298, 308 and 318 K) and ionic strength 0.1 M KCl. These values were confirmed by different computational methods. The values of the acid dissociation constants of (PL1-PL4) were found to be lower than that of (L1-L4) values. The vinyl group (H2C=CH) in the monomeric form (L1-L4) actually decreases the elecron density on the bonds near to it. On the other hand, the absence of the vinyl group in polymeric form (PL1-PL4) retards the removal of the ligand proton and increases the basicity (higher pKH values). The successive stability constants (log K1 and log K2) of the complexes of (L1-L4) with Mn2+, Co2+, Ni2+, Cu2+, Zn2+, La3+, UO22+ and Th4+ were determined using different computional methods in the appropiate solvent-water mixture at 298, 308 and 318 K. The stability constants of (PL1-PL4) in metal complexes are higher than the corresponding metal complexes of (L1-L4). This is quite reasonable because the ligand in polymeric form is considered as a better complexing agent. The order of stability constants are in agreement with that found by Irving and Williams for (L1-L4) complexes in monomeric and polymeric forms.