883161-31-7Relevant academic research and scientific papers
Synthesis and crystal structures of platinum (II) complexes with phosphine sulfide: Cis-Dichloro[dimethylsulfoxide](triphenylphosphine sulfide) platinum (II) and (-)-cis-dichloro[(S)-methyl-p-tolylsulfoxide](triphenylphosphine sulfide) platinum (II)
Skvortsov, Alexej N.,Reznikov, Alexander N.,De Vekki, Dimitry A.,Stash, Adam I.,Belsky, Vitaly K.,Spevak, Vitaly N.,Skvortsov, Nickolaj K.
, p. 1031 - 1040 (2006)
The addition of triphenylphosphine sulfide (Ph3PS) to bis-sulfoxide platinum (II) complexes [Pt(Me2SO)2Cl 2] and (-)-[Pt(Me-p-TolSO)2Cl2] yields mixed ligand complexes [Pt(Ph3PS)(Me2SO)Cl2] (1) and (-)-[Pt(Ph3PS)(Me-p-TolSO)Cl2] (2), which are effective catalysts for hydrosilylation reaction. These mixed-ligand complexes were obtained in crystal state and analyzed by X-ray diffraction, 1H, 31P and 195Pt NMR; 2 was also studied by circular dichroism spectroscopy. Both complexes exist in CDCl3 solution as a dynamic equilibrium of two geometric isomers with an approximate 1:10 ratio, but only cis-isomer is obtained on crystallization. The X-ray structures of the complexes have classical geometry, and phosphine sulfide and sulfoxides are coordinated via sulfur. The new structural data for simple platinum-Ph 3PS coordination bond, unaffected by chelation or bridging, were evaluated. The lengths of this bond are 2.300(4) ? in 1 and 2.305(3) ? in 2, respectively. PtSP angle equals 105.7(2)° in 1 and 104.05(13)° in 2, the PtSP plane is almost perpendicular to the coordination plane. The static trans-influence of Ph3PS is estimated to be strong and close to that of S-coordinated Me2SO. The complex 2 exhibits strong circular dichroism at a wavelength below 330 nm, caused both by inherent Me-p-TolSO stereogenic center and induced asymmetry of Ph3PS.
