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Angew Chem Int Ed Engl. 2014 May 12;53(20):5206-9. doi: 10.1002/anie.201400291. Epub 2014 Apr 1.

Synthesis of tris- and tetrakis(pentafluoroethyl)silanes.

Author information

1
Fakultät für Chemie, Universität Bielefeld, Universitätsstrasse 25, 33615 Bielefeld (Germany).

Abstract

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)3 CF3 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 to be decreased by electron-donating substituents, such as dialkylamino groups. The easily accessible Si(C2F5)3 NEt2 is a valuable precursor for a series of tris(pentafluoroethyl)silanes.

KEYWORDS:

Lewis acids; direct fluorination; fluorine; silanes

PMID:
24692241
DOI:
10.1002/anie.201400291
[Indexed for MEDLINE]

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