(10) have been prepared. All complexes were characterized by elemental analyses, IR and NMR. The crystal structures of complexes 1 and 10 were determined by X-ray single crystal diffraction. For complex 1, the central tin atom exists in a skew-trapezoidal planar geometry defined by two asymmetrically coordinated dithiocarbamate ligands and two 4-cyanobenzyl groups. In addition, because of the presence of close intermolecular non-bonded contacts, complex 1 is a weakly-bridged dimer. In complex 10, the central tin atom is rendered pentacoordinated in a distorted trigonal bipyramidal configuration by coordinating with S atoms derived from the dithiocarbamate ligand. In vitro assays for cytotoxicity against five human tumor cell lines (MCF-7, EVSA-T, WiDr, IGROV and M226) furnished the significant toxicities of the title complexes.
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