Synthesis, characterization and biological activity of some nickel(II) mixed ligands complexes of dithiocarbamate and 1,10-phenanthroline

Two ligands; pyrrolidine-1-carbodithioate sodium (L 1 ) and piperidine-1-carbodithioate sodium salt(L 2 ) and their nickel(II) mixed ligands complexes with 1,10-phenanthroline (L 3 ) have been synthesized and characterized by FT-IR, UV-visible, 1 H NMR spectra. The biological activities of these complexes were also evaluated. The spectral data indicated that the 1,10-phenanthrolineand dithiocarbamate ligands are considered as a bidentate nitrogen and sulfur ligands, respectively. The study suggested that the above ligands formed complexes of general formula [Ni(L x ) 2 (L 3 ) 1 ] and [Ni(L x ) 1 (L 3 ) 2 ]Cl (x=1 or 2) mononuclear (monomer) complexes. The complexes show moderate and selective activity against tested microorganisms.