الفهرس 
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Abstract
The ligands used in this study are 2amino4,5tetramethylene thiophene3carboxylic acid (HAteTC), 2amino4,5pentamethylene thiophene3carboxylic acid (HApeTC) and 2amino4,5trimethylene thiophene3carboxylic acid (HAtrTC). The procedures of the preparation of the ligands (HAteTC), (HApeTC) and (HAtrTC) and their metal complexes were described. Physical, elemental analyses, molar conductivities, thermal analysis, spectral (IR, UVVis., 1H NMR) and magnetic moment measurements have been used to characterize the isolated solid complexes. Potentiometric and antimicrobial activity studies were carried out. The results indicates that all the metal complexes are nonelectrolytic in nature. IR and 1H NMR spectral studies show that all the ligands behave as a mononegative tridentate through the bidentate carboxylate group and the amino group or mononegative bidentate ligands through the monodentate carboxylate group and the amino group. Magnetic and electronic spectral studies indicate that Co(II), Ni(II), Mn(II), Fe(III) and Cr(III) complexes have octahedral structure, while Cu(II) complex has square planar structure. Thermal decomposition of some solid complexes under an atmosphere of nitrogen is investigated. The stoichiometric calculations from the obtained thermograms strongly confirm the suggested formulae of these complexes which are in agreement with the results of the other techniques.