长链α-烯烃的硅氢加成反应研究

Study of Hydrosilylation of Long-chain α-Alkene

以聚三氟丙基乙烯基甲基硅氧烷为保护剂制备了102白色担体负载的铂络合物催化剂,用于催化长链α-烯烃与甲基二氯硅烷的硅氢加成反应。考察了铂催化剂用量、反应温度、不同长链烯烃原料、催化剂回收利用等因素对长链烷基甲基二氯硅烷收率的影响,结果表明,102白色担体负载的铂络合物催化剂对该硅氢加成反应具有较高的活性和稳定性,在常温下无需加热,无诱导期即可发生加成反应。在密闭体系中,1-十二烯烃与甲基二氯硅烷的摩尔比为1∶1.1,铂络合物与甲基二氯硅烷的摩尔比为6.5×10-5∶1时,十二烷基甲基二氯硅烷的收率可达88%;敞开体系中,相同条件下,十二烷基甲基二氯硅烷的收率可达77%。催化剂重复使用8次不失活。

Platinum complex catalyst loaded on 102 white support was prepared under the protectiou of polytrifluoropropylvinylmethylsiloxane and was used to catalyze the hydrosilylation reaction of α-alkenes and methyldichlorosilane. Experimental results showed that the catalyst has high activity and stability. The reaction can begin at room temperature without heating and induction period,yield of the addition product can reach 88% in closed system and 77% in open system when n （α-alkene） ： n （methyldichlorosilane） = 1 ： 1. 1 and n （ Pt catalyst） ： n （methyldichlorosilane） = 6.5 × 10^-5 ： 1. The catalyst remained active after being reused for eight times.