Synthesis of Functional Monosilanes by Disilane Cleavage with Phosphonium Chlorides
作者:Tobias Santowski、Alexander G. Sturm、Kenrick M. Lewis、Thorsten Felder、Max C. Holthausen、Norbert Auner
DOI:10.1002/chem.201805787
日期:2019.3.12
thousands of tons annually. This report is on methylchlorodisilane cleavage reactions with use of phosphonium chlorides as the cleavage catalysts and reaction partners to preferably obtain bifunctional monosilanes MexSiHyClz (x=2, y=z=1; x,y=1, z=2; x=z=1, y=2). Product formation is controlled by the reaction temperature, the amount of phosphonium chloride employed, the choice of substituents at the phosphorus
大规模生产甲基氯硅烷Me n SiCl 4− n(n = 1–3)的Müller-Rochow直接法(DP)产生乙硅烷残基(Me n Si 2 Cl 6− n,n = 1–6, DPR),每年数千吨。该报告是关于使用氯化nium作为裂解催化剂和反应伙伴的甲基氯二硅烷裂解反应,以优选获得双官能甲硅烷Me x SiH y Cl z(x = 2,y = z = 1; x,y = 1,z =2; x = z = 1,y = 2)。产物的形成是由反应温度,所用氯化phosphorus的量,磷原子上取代基的选择以及反应混合物中溶于醚中的氯化氢的存在控制的。乙硅烷骨架上的氢取代基取代氯可大大提高乙硅烷裂解的整体效率,从而在相对中等的条件下几乎可以定量形成硅烷单体。因此,DPR的这种高效处理不仅增加了DP的经济价值,而且使环境污染最小化。