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Synthesis of Tris‐ and Tetrakis(pentafluoroethyl)silanes
Author(s) -
Steinhauer Simon,
Bader Julia,
Stammler HansGeorg,
Ignat‘ev Nikolai,
Hoge Berthold
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201400291
Subject(s) - silanes , silane , chemistry , tris , lewis acids and bases , fluoride , silicate , organic chemistry , polymer chemistry , catalysis , inorganic chemistry , biochemistry
The synthesis and complete characterization of functional, highly Lewis acidic tris(pentafluoroethyl)silanes as well as tetrakis(perfluoroalkyl)silanes Si(C 2 F 5 ) 4 and Si(C 2 F 5 ) 3 CF 3 by direct fluorination is described. The reaction of SiCl 4 with LiC 2 F 5 invariably affords (pentafluoroethyl)fluorosilicates. To avoid silicate formation by fluoride transfer from LiC 2 F 5 the Lewis acidity of the silane has to be decreased by electron‐donating substituents, such as dialkylamino groups. The easily accessible Si(C 2 F 5 ) 3 NEt 2 is a valuable precursor for a series of tris(pentafluoroethyl)silanes.