描述了通过直接氟化作用合成功能性高路易斯酸性三(五氟乙基)硅烷以及四(全氟烷基)硅烷Si(C 2 F 5)4和Si(C 2 F 5)3 CF 3的方法。SiCl 4与LiC 2 F 5的反应总是提供(五氟乙基)氟硅酸盐。为避免氟化物从LiC 2 F 5转移而形成硅酸盐,必须通过供电子性取代基(例如二烷基氨基)降低硅烷的Lewis酸度。易接近的Si(C 2 F5)3 NEt 2是一系列三(五氟乙基)硅烷的有价值的前体。
The synthesis and complete characterization of functional, highly Lewis acidic tris(pentafluoroethyl)silanes as well as tetrakis(perfluoroalkyl)silanes Si(C2F5)4 and Si(C2F5)3CF3 by direct fluorination is described. The reaction of SiCl4 with LiC2F5 invariably affords (pentafluoroethyl)fluorosilicates. To avoid silicate formation by fluoride transfer from LiC2F5 the Lewis acidity of the silane has
描述了通过直接氟化作用合成功能性高路易斯酸性三(五氟乙基)硅烷以及四(全氟烷基)硅烷Si(C 2 F 5)4和Si(C 2 F 5)3 CF 3的方法。SiCl 4与LiC 2 F 5的反应总是提供(五氟乙基)氟硅酸盐。为避免氟化物从LiC 2 F 5转移而形成硅酸盐,必须通过供电子性取代基(例如二烷基氨基)降低硅烷的Lewis酸度。易接近的Si(C 2 F5)3 NEt 2是一系列三(五氟乙基)硅烷的有价值的前体。
Chlorosilicates represent important intermediates in SN2 reactions of chlorosilanes. They can be stabilized by the introduction of electron‐withdrawing substituents. Salts of various (pentafluoroethyl)chlorosilicates have been isolated and structurally characterized.
氯硅酸盐是氯硅烷在S N 2反应中的重要中间体。可以通过引入吸电子取代基来稳定它们。各种(五氟乙基)氯硅酸盐的盐已经被分离出来并在结构上进行了表征。