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Angew Chem Int Ed Engl. 2017 Jul 10;56(29):8578-8582. doi: 10.1002/anie.201704097. Epub 2017 Jun 9.

Tris(perfluorotolyl)borane-A Boron Lewis Superacid.

Author information

1
Lehrstuhl für Anorganische Chemie und Strukturchemie and Centrum für Molekulare Materialien CM2, Fakultät für Chemie, Universität Bielefeld, Universitätsstrasse 25, 33615, Bielefeld, Germany.

Abstract

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.

KEYWORDS:

Lewis superacid; gas-phase electron diffraction; tris(pentafluorophenyl)borane; tris(perfluorotolyl)borane

PMID:
28524451
DOI:
10.1002/anie.201704097

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