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Hexafluorophosphates of chlorotris(dimethyl sulfide)platinum(II) and bromotris(dimethyl sulfide)platinum(II)
Christian Hansson1, Vadim Yu Kukushkin, Karin Lövqvist
1Inorganic Chemistry, Centre for Chemistry and Chemical Engineering, Lund University, PO Box 124, SE-221 00 Lund, Sweden. christian.hannson@inorg.lu.se
Abstract:
The title compounds, chlorotris(dimethyl sulfide-kappaS)platinum(II) hexafluorophosphate, [PtCl(C(2)H(6)S)(3)]PF(6), and bromotris(dimethyl sulfide-kappaS)platinum(II) hexafluorophosphate, [PtBr(C(2)H(6)S)(3)]PF(6), are isomorphous and are composed of [PtX(dms)(3)](+) complex cations (X = Cl and Br, and dms is dimethyl sulfide) and PF(6)(-) anions. The Pt atom is coordinated by three S atoms and one X atom in a pseudo-square-planar coordination, with Pt-S distances in the range 2.293 (1)-2.319 (2) A. Two dms ligands have a staggered conformation with respect to the coordination plane, while the third is rotated by approximately 90 degrees compared with the orientation of the other two. The packing can be described as consisting of [PtX(dms)(3)](2)(PF(6))(2) units with a centre of symmetry. In this description, the Pt(II) atom has a pseudo-octahedral coordination, with four normal bonds and two long weak interactions. Density-functional theory calculations show that a conformation in which one dms ligand is not staggered is less favourable than having all three dms ligands staggered.
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