New complexes with a mixture of aspirin (acetylsalicylic acid ) with methyldopa or paracetamol with methyldopa were synthesized via the reflux of reaction mixture using a basic medium to deprotonate the ligands. These new complexes of Mn(II),Fe(II),Co(II),Ni(II) and Cu(II) with a mixture of aspirin (acetylsalicylic acid), paracetamol and methyldopa have characterized using FTIR, UV-visible spectra, magnetic susceptibility, flame atomic absorption, C.H.N.S analysis and melting points measurements. The two mixed ligands have been found to act as bidentate chelating agents. Aspirin (acetylsalicylic acid) complexes coordinate to the metal ions through the oxygen of Aspirin's ester group and oxygen of the carboxyl group, while Methyldopa as ligand is coordinated through the oxygen of the carboxyl group and the nitrogen of the amide groups. The Paracetamol was coordinated through the oxygen atom of carboxyl group and the nitrogen atom of the amide group. The stability of these new complexes depends on the size of the chelate rings, thus these ligands with a flexible organic backbone and their complexes contain five and six membered chelate rings, which have almost no strain. The molar conductance measurements for the metal complexes show non-electrolytic behavior in DMF solvent." The all-synthesized complexes which show non-electrolytic properties, also were no conducting electrical current behaved as bi-dentate with octahedral geometrical isomers.
Synthesis of mixed metal complexes were done through reaction of two drugs such as antipyrine, or ciprofloxacin with Metronidazole to have eight complexes. Physical, chemical and antibacterial activity of new complexes were studied. These mixed ligands were further coordinating with bivalent transition metals in a metal: ligands mixture ratio 1:1. These complexes were characterized by using elemental analysis and physical properties, in addition molar conductance in DMF which showed non-electrolytic behavior. FT-IR spectra revealed absorption bands for new ligands and metal complexes that agreed with the propose structures and the electronic spectra verified that these complexes display six-coordinate octahedral geometry. Antibacterial activity showed good results.
Copper (II) and Zinc (II)Complexes with O-nitrobenzylidenetrimethoprim were prepared. The complexes were identified by employing Technique of CHNS analysis , molar conductance, magnetic susceptibities and spectral measurements (FT-IR electronic he above ligand formed ionic complexes having general T ,
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