α,ω-二氯聚二甲基硅氧烷(1)是有机硅高分子制品的重要中间体,其n值的大小对有机硅高分子制品的性能有很重要的影响.因此,选用如下反应来制取中间物,是人们感兴趣的方法.其特点是C—Si在反应中不断裂,而Cl—Si和O—Si却在(CH_3)_2SiCl_2与-(CH_3)_2Si—O-间进行交换,以形成各种不同n值的α,ω-二氯聚二甲基硅氧烷.用精密分馏、气体色谱等方法定量地研究反应产物是不合适的,因为 α, ω-Dichlorodimethylsiloxane (1) is an important intermediate of silicone polymer products, and the value of n has an important influence on the performance of silicone polymer products. Therefore, the following The reaction is used to prepare the intermediate, which is of interest to people and is characterized by the fact that C-Si does not break during the reaction, while Cl-Si and O-Si are interchanged between (CH_3) _2SiCl_2 and - (CH_3) _2Si-O- Exchange to form various α, ω-dichlorodimethylsiloxanes of different n values.Quantitative study of the reaction products by methods such as precision fractionation and gas chromatography is not suitable because