STUDIES OF MIXED LIGAND COMPLEXES FROM DIALKYLDITHIOPHOSPHATE AND THIOSEMICARBAZIDE OR THIOSEMICARBAZONES WITH NICKEL(II)

The complexes Ni{(RO)₂PS₂}₂Tsc], Ni{(RO)₂PS₂}₂ApTsc], and Ni{(RO)₂PS₂}FurTsc.2H₂O] where R = methyl (Me), ethyl (Et) or propyl (Prop); Tsc = thiosemicarbazide, ApTsc = 2-acetylpyridine-thiosemicarbazone, and FurTsc = furfuraldhydethiosemicarbazone have been synthesized and characterized by elemental analysis, conductance measurements, and spectral studies (IR, UV-Vis, and mass). Thermal studies of the complexes have been carried out using TG and DTG techniques. An octahedral structure has been proposed for all types of the complexes. A representative types of the complexes are tested against various pathogenic bacteria and fungi. The Ni{(EtO)₂PS₂}₂ApTsc] shows a high degree of activity against bacteria and fungi; this may be attributed to the pyridyl ring of the 2-acetylpyridinethiosemicarbazone ligand.