Platinum Bis(tricyclohexylphosphine) Silyl Hydride Complexes
| Autor: | Danny Chan, Robin N. Perutz, Sarah L. Heath, Iman G. Khazal, Sylviane Sabo-Etienne, Phillipa L. Timmins, Simon B. Duckett |
|---|---|
| Rok vydání: | 2004 |
| Předmět: | |
| Zdroj: | Organometallics. 23:5744-5756 |
| ISSN: | 1520-6041 0276-7333 |
| DOI: | 10.1021/om049549n |
| Popis: | A series of platinum metal silyl hydride complexes, cis-Pt(PCy3)2(H)(SiR2R‘) (SiR2R‘ = SiPh2H, SiEt2H, SiPh3, SiEt3, SiMe2(OSiHMe2), Si(OSiMe3)2Me, SiMe2(CH2CHCH2), SiMe2Et, SiMe2[OCH2C(Me)CH2], Si(OMe)2(CH2CHCH2), SiPh2(OSiPh2H)), have been prepared in solution by reaction of Pt(PCy3)2 with the appropriate silane, HSiR2R‘. The complex cis-Pt(PCy3)2(H)(HSiPh2) (1-cis) has been characterized by X-ray crystallography at −100 °C. The platinum center exhibits a distorted-square-planar geometry with angles P(1)−Pt−P(2) = 113.55(3)°, P(1)−Pt−Si = 146.83(3)°, and P(2)−Pt−Si = 99.37(3)°. The reaction of Pt(PCy3)2 with chlorinated hydrosilanes at −78 °C yields the analogous complexes cis-Pt(PCy3)2(H)(SiR2R‘) (SiR2R‘ = SiMe2Cl, SiMeCl2, SiCl3), which isomerize to their trans isomers on warming to room temperature. The complex 1-cis and several analogues convert to the trans isomers photochemically at room temperature. Ready silane exchange is demonstrated by the reaction of HSiPh3 with cis-Pt(PCy3)2(D)(SiPh3) and b... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|