Synthesis, Characterization and Antibacterial Studies on Copper(II) Binuclear Complexes with Substituted Piperidin-4-ones CHINNIAGOUNDER THEIVARASU* and KRISHNAN SIVAPRAKASH

Copper(II) Chloride binuclear complexes with variously substituted 2,6-diphenly piperidin4-ones [Cu2LCl4(H2O)3] have been synthesized and characterized by elemental analysis, molar conductance, magnetic susceptibility measurements, thermal and spectral studies. Molar conductance data show that these complexes are non-electrolytes. The presence of three coordinated water molecules is confirmed by thermal and infrared spectral studies. IR spectral data indicate that the piperidin-4-ones are monodentate and coordinate only through ring nitrogen. The electronic spectral and magnetic studies suggest distorted square-pyramidal environment for Cu(II) complexes. Antibacterial activities of the ligands and their complexes have been tested against bacterial culture by disc diffusion method. It has been found that all the complexes have higher activity than the free ligands.