Tris(perfluorotolyl)borane-A Boron Lewis Superacid.

Leif A KörteJan SchwabedissenMarcel SoffnerSebastian BlomeyerChristian G ReuterYury V VishnevskiyBeate NeumannHans-Georg StammlerNorbert W Mitzel

Published in: Angewandte Chemie (International ed. in English) (2017)

Tris[tetrafluoro-4-(trifluoromethyl)phenyl]borane (BTolF) was prepared by treating boron tribromide with tetrameric F3 CC6 F4 -CuI . The F3 CC6 F4 -CuI was generated from F3 CC6 F4 MgBr and copper(I) bromide. Lewis acidities of BTolF evaluated by the Gutmann-Beckett method and calculated fluoride-ion affinities are 9 and 10 %, respectively, higher than that of tris(pentafluorophenyl)borane (BCF) and even higher than that of SbF5 . The molecular structures of BTolF and BCF were determined by gas-phase electron diffraction, that of BTolF also by single-crystal X-ray diffraction.

Keyphrases

electron microscopy
high resolution
crystal structure
drinking water
single molecule
magnetic resonance imaging
magnetic resonance
dual energy
mass spectrometry