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One-Step Synthesis of Siloxanes from the Direct Process Disilane Residue

机译:由直接工艺乙硅烷残留物一步合成硅氧烷

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摘要

The well-established Muller-Rochow Direct Process for the chloromethylsilane synthesis produces a disilane residue (DPR) consisting of compounds MenSi2Cl6-n (n=1-6) in thousands of tons annually. Technologically, much effort is made to retransfer the disilanes into monosilanes suitable for introduction into the siloxane production chain for increase in economic value. Here, we report on a single step reaction to directly form cyclic, linear, and cage-like siloxanes upon treatment of the DPR with a 5m HCl in Et2O solution at about 120 degrees C for 60h. For simplification of the Si-Si bond cleavage and aiming on product selectivity the grade of methylation at the silicon backbone is increased to n4. Moreover, the HCl/Et2O reagent is also suitable to produce siloxanes from the corresponding monosilanes under comparable conditions.
机译:完善的用于氯甲基硅烷合成的Muller-Rochow直接工艺产生的乙硅烷残留物(DPR)由每年成千吨的MenSi2Cl6-n(n = 1-6)化合物组成。从技术上讲,已进行了很多努力以将乙硅烷重新转移为适合引入硅氧烷生产链的乙硅烷,以提高经济价值。在这里,我们报道了一步法反应,即在约120摄氏度下用5m HCl的Et2O溶液处理DPR时,直接形成环状,线性和笼状硅氧烷,反应时间约为120摄氏度,持续60h。为了简化Si-Si键断裂并针对产物选择性,将硅主链上的甲基化程度提高到n4。而且,HCl / Et 2 O试剂也适合在可比较的条件下由相应的甲硅烷生产硅氧烷。

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