Hydrosilylation of 1-alkenes with dichlorosilane

✍ Scribed by Gerardus J. J. Out; Harm-Anton Klok; Leonore Schwegler; Holger Frey; Martin Möller

• Book ID: 102940329
• Publisher: John Wiley and Sons
• Year: 1995
• Tongue: English
• Weight: 554 KB
• Volume: 196
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.1995.021960112

✦ Synopsis

Symmetrically and unsymmetrically substituted diorganodichlorosilanes have been prepared by hydrosilylation with dichlorosilane using two different platinum catalysts, i. e., hexachloroplatinic acid ("Speier's catalyst") and a platinum cyclovinylmethylsiloxane complex. Hydrosilylation of unsubstituted 1-alkenes proved to be very efficient, yielding anti-Markonikov substituted din-alkyldichlorosilanes. However, no reaction was observed when electron-deficient 1 -alkenes were used. Octacarbonyldicobalt enabled formation of the monoadduct of 1 H, lW,2H-perfluoro-lhexene with dichlorosilane, which was employed in a second hydrosilylation of the olefin. Thus, the anti-Markovnikov diadduct was obtained in 40% overall yield. The two-step synthesis has also been applied successfully to obtain unsymmetrically substituted diorganodichlorosilanes containing nitrile and ether groups.