PREPARATION AND CHARACTERIZATION OF NEW In(III), Re(III), AND Re(V) COMPLEXES WITH THENOYLTRIFLUOROACETONE AND SOME BIDENTATE HETEROCYCLIC LIGANDS
摘要:
New In(III), Re(III) and Re(V) complexes with the thenoyltrifluoroacetone ligand (HTTA) of the general formulae [In(TTA)(H2O)(4)]SO4, [Re(TTA)(n)(H2O)(x)]Cl3-n and [ReO(TTA)(n)(H2O)(x)]Cl3-n (where n and x refer to the number of [TTA](-) moieties and H2O molecules, respectively) have been prepared and characterized by spectroscopy, thermogravimetry, elemental analyses and X-ray diffraction. The charge densities on the ligand atoms were calculated via CNDO-SCF calculations. The newly prepared complexes [In(TTA)(H2O)(4)]SO2 and [ReO(TTA)(H2O)(2)]CL2 were employed as precursors for the synthesis of the mixed-ligand complexes [In(TTA)(HOCTA)(2)], [In(TTA)(TZT)(2)] and [ReO(TTA)(HOTCA)]Cl using R(-)-2-oxothiazolidine 4-carboxylicacid (H(2)OTCA) and 1H-1,2,4-triazole-3-thiol (H(2)TZT) as ligands. The synthesized mixed-ligand complexes were characterized by the conventional physical and chemical methods of analysis applied earlier for the characterization of the precursors. The investigated complexes are soluble in water, ethanol and acetonitrile, insoluble in non-polar solvents and could be of potential use for clinical studies. The antibacterial activity of the investigated complexes has been tested and evaluated.