[CH:1]1[CH2:5][CH2:4][CH2:3][CH:2]=1.[Cl:6][SiH:7]([Cl:9])[Cl:8].C(O)(C)C>[H+].[H+].Cl[Pt-2](Cl)(Cl)(Cl)(Cl)Cl>[CH:1]1([Si:7]([Cl:9])([Cl:8])[Cl:6])[CH2:5][CH2:4][CH2:3][CH2:2]1In a 100 ml autoclave were charged 13.7 g (0.201 mole) of cyclopentene, 24.8 g (0.183 mole) of trichlorosilane and 25 μl of a 0.077 m mole/ml chloroplatinic acid solution in isopropyl alcohol (platinum content 1.92×10-6 mole), which were then stirred at 150° C. for 30 minutes. Cyclopentyl trichlorosilane was obtained quantitatively.
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