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氟硅烷是近年出现的高效粮仓熏蒸杀虫剂之一,由氯硅烷与氟离子反应而制得。二氟二甲基硅烷常温为无色微臭气体,沸点为2.5℃。试验室制法:以正丁醇为溶剂,在盐酸溶液中二氯二甲基硅烷与氟化钙反应,气态产物用于冰冷却液化,贮于钢瓶中。从原料和反应条件看,钢瓶中的样品在室温下气相组份主要是二氟二甲基硅烷和空气。在提制纯品较困难和缺乏质谱、红外等检测仪器的情况下,我们研究出简易的二氟二甲基硅烷分子量测定和含量分析方法。一、分子量的测定分子量的测定,通常有熔点降低法、沸点
Fluorosilane is one of the most efficient granary fumigation pesticides that has emerged in recent years and is produced by the reaction of chlorosilanes with fluoride ions. Difluorodimethylsilane at room temperature as a colorless odor gas, the boiling point of 2.5 ℃. Laboratory preparation: n-butanol as solvent, hydrochloric acid solution of dichlorodimethylsilane and calcium fluoride reaction, the gaseous product for ice cooling liquefied, stored in the cylinder. From the raw materials and reaction conditions, the samples in the cylinders were mainly difluorodimethylsilane and air at room temperature. In the preparation of pure more difficult and the lack of mass spectrometry, infrared and other detection instruments, we have developed a simple method of determination of dimethyl difluorosilane molecular weight and content analysis. First, the determination of molecular weight Determination of molecular weight, usually lower melting point, boiling point