Syntheses and crystal structures of new mono- and di-nuclear platinum(II) complexes with dithioether ligands

Two new platinum(II) complexes with dithioether ligands, cis-[Pt(L1)Cl2] (1) and cis-[Pt(L2)Cl2]2 (2), where L1=1,3-bis(phenylthio)propane and L2=1,5-bis(n-propylthio)pentane, have been synthesized and structurally characterized by X-ray diffraction analyses. In 1, the Pt(II) center is four-coordinated and forms a six-membered chelated ring with L1, while 2 exhibits a unique di-nuclear structure containing a 16-membered metallomacrocyles with chair-shaped conformation, in which each Pt(II) center is coordinated by two chloride anions and two sulfur-donors from two L2 ligands.