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Original Article

Subject Areas



Schiff base; Transition metal complexes; IR; 1HNMR; conductance; electronic spectra; magnetic moment; Thermal analysis; Biological Activity


A novel tetradentate Schiff base (I) synthesized from sulfametrole [N1-(4-methoxy-1,2,5-thiadiazole-3-y1)sulfanilamide] and salciyldelyde forms stable complexes with transition metal ions such as Fe(III), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and UO2(II) in absolute ethanol. Elemental analyses, IR, 1HNMR, electronic spectra, magnetic moment, mass spectra and thermal analysis (TGA) were used to confirm the structures. From the elemental analyses data, the complexes were proposed to have the general formulae [M2Cl3(I)(H2O)5].YH2O (Where M=Co(II),Ni(II),Cu(II), Zn(II) and Cd(II), Y=0-3], [Fe2Cl5(I)(H2O)3]: 2H2O, (FeSO4)2 (I)(H2O)4]:2H2O and [(UO2)2 (NO3)3 (I) (H2O)]:2H2O. The molar conductance data reveal that all the metal complexes were non-electrolytes. The IR, 1HNMR, spectra show that ligand (I) is coordinated to the metal ion in a bidentate manner ON and via NO donor sites of the azomethine-N, phenolic-OH, enolic sulfonamide–OH and thiadiazole–N. The magnetic and electronic spectra showed that the complexes exhibit octahedral geometry. The thermal behaviour of the complexes was studied. All the prepared compounds were screened for their antibacterial and antifungal properties and have exhibited potential activities

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