Synthesis,characterization,x-ray structure and biological screenings of silver(I) and copper(I) complexes of triphenylphosphine dithiocarboxylate

Two new transition metal dithiocarboxylates with general formula r 2ml,where r =p(c6h5)3,m=ag(i) (1),cu(i) (2) and l = sodium salt of 4-formylpiperazine-1-carbodithioate,have been synthesized and characterized by elemental analysis,ft-ir,multinuclear nmr (1h,13c and 31p) and mass spectrometry. the structure of complex (1) has been determined by single-crystal x-ray diffraction and illustrated the asymmetric bidentate bonding of the ligand. the crystal structure of complex (1) shows a distorted tetrahedral geometry. the inclination of the structure of complex (1) towards distorted tetrahedral is due to the steric hindrance of phenyl bulky groups. a subsequent antimicrobial study indicates that the compound (2) is considerably active against some bacterial and fungal strains while compound (1) shows little or no activity.