1,3-双(γ-氯丙基)-1,1,3,3-四甲基二硅氧烷的制备

以二甲基氯硅烷和γ-氯丙烯为原料，经硅氢加成、水解缩合两步反应得到双官能团有机硅烷单体1，3-双（γ-氯丙基）-1，1，3，3-四甲基二硅氧烷，总产率为81.0%.对第1步硅氢加成反应进行了条件优化，确定最佳条件为：反应时间5 h，催化剂用量2×10^-5 g·mL^-1，反应物配比1∶1，此时产率可达83.8%；第2步水解缩合反应产率为96.7%.采用红外光谱、核磁共振、气相色谱-质谱联用等检测方法对产物进行了结构鉴定.

Preparation of 1,3-bis(γ-chloropropyl)-1,1,3,3-tetramethyldisiloxane

1,3-bis(γ-chloropropyl)-1,1,3,3-tetramethyldisiloxane is a reactive functional group terminated siloxane, which is synthesized using dimethylchlorosilane and allyl chloride as starting materials. Through hydrosilylation and hydrolytic condensation, 1,3-bis(γ-chloropropyl)-1,1,3,3-tetramethyldisiloxane was prepared in a total yield of 81%. The optimal conditions of hydrosilylation were studied. The yield of hydrosilylation was 83.8% when the reaction time was 5 h, the amount of platinum catalyst was 2×10^-5 g·mL^-1 and the ratio of reactants was 1∶1. The yield of hydrolytic condensation was 96.7%. Additionally, IR, ¹H NMR and gas chromatography-mass spectrometer were used to characterize the structure of target product.