Synthesis and characterization of metal complexes of N-alkyl- N-phenyl dithiocarbamates

Abstract

Ammonium N-ethyl- N-phenyl dithiocarbamate ( L 1 ) and N-butyl- N-phenyl dithiocarbamate ( L 2 ), and their group 12 metal complexes formulated as Zn 2L 1 4 , CdL 1 2 , HgL 1 2 , Zn 2L 2 4 , CdL 2 2 , HgL 2 2 have been synthesized and characterized by elemental analyses, IR, 1H and 13C NMR spectroscopy. The crystal structures of the zinc complexes ( Zn 2L 1 4 and Zn 2L 2 4 ) are also reported. Single crystal analyses of the two complexes revealed the presence of distorted trigonal bipyramidal and tetrahedral coordination geometry about the metal ions. The dithiocarbamate acts as bidentate chelating and bidentate bridging ligands between the metal ions giving centrosymmetric dimeric molecules. The apparent substitution of the ethyl substituents in L 1 by the butyl groups in L 2 results in profound change in structure.