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Xantphos as cis- and trans-chelating ligand in square-planar platinum(II) complexes. Hydroformylation of styrene with platinum-xantphos-tin(II)chloride system |
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| Authors: | György Petöcz Tamás Kégl |
| Institution: | a Department of Inorganic Chemistry, University of Pécs, Ifjusag u. 6, P.O. Box 266, H-7624 Pécs, Hungary b Institute of Biochemistry, University of Pécs, P.O. Box 99, H-7643 Pécs, Hungary c Research Group for Petrochemistry of the Hungarian Academy of Sciences, H-8201 Veszprém, Hungary d Research Group for Chemical Sensors of the Hungarian Academy of Sciences, P.O. Box 266, H-7624 Pécs, Hungary |
| Abstract: | Platinum(II) complexes of a diphosphine ligand xantphos (4,5-bis(diphenylphosphino)-9,9-dimethyl-xanthene) have been synthesised and characterised by NMR, conductivity and catalytic investigations. In addition to the parent complex cis-PtCl2(xantphos), trans-platinum(II) complexes of square-planar geometry containing xantphos as a trans-chelating ligand can be obtained due to the large bite angle of the ligand. The platinum-xantphos-tin(II)chloride system acts as active hydroformylation catalyst in the hydroformylation of styrene resulting in high chemo- and regio-selectivities of up to 99.8% and 88%, respectively. |
| Keywords: | Platinum Phosphine Trigonal bipyramidal geometry Hydroformylation |
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