Synthesis and crystal structures of new complexes of di- and tribenzyltin N-ethyl and N-benzyl-2-amino cyclopent-1-ene-1-carbodithioates

The dithiocarboxylato complexes of tin, Bz2SnCl(EtACDA) (1a) Bz=benzyl, Bz2Sn(EtACDA)2 (1b), and Bz3Sn(EtACDA) (1c) have been synthesized by the reaction of Bz2SnCl2 or Bz3SnCl with 2-N-ethylamino-1-cyclopentene-1-carbodithioic acid (HEtACDA). The reaction of 2-amino-1-cyclopente-1-carbodithioic acid (H2ACDA) with benzylamine, gave 2-N-benzylamino-1-cyclopente-1-carbodithioic acid (HBzACDA) (2), which reacts with Bz2SnCl2 or Bz3SnCl to give Bz2SnCl(BzACDA) (3a), Bz2Sn(BzACDA)2 (3b) and Bz3Sn(BzACDA) (3c). The products were characterized by IR and NMR (1H, 13C and 119Sn) spectroscopies and elemental analysis. The crystal structures of 1c, 2 and 3b have also been determined. In all the complexes Sn is bound asymmetrically to the dithiocarboxylato ligand through two sulfur atoms. The orientation of the ligands is determined by NH⋯S hydrogen bonds.