Tris(perfluorotolyl)borane-A Boron Lewis Superacid

Leif A Körte; Jan Schwabedissen; Marcel Soffner; Sebastian Blomeyer; Christian G Reuter; Yury V Vishnevskiy; Beate Neumann; Hans-Georg Stammler; Norbert W Mitzel

doi:10.1002/anie.201704097

Tris(perfluorotolyl)borane-A Boron Lewis Superacid

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

Authors

Leif A Körte¹, Jan Schwabedissen¹, Marcel Soffner¹, Sebastian Blomeyer¹, Christian G Reuter¹, Yury V Vishnevskiy¹, Beate Neumann, Hans-Georg Stammler¹, Norbert W Mitzel¹

Affiliation

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

PMID: 28524451
DOI: 10.1002/anie.201704097

Abstract

Tris[tetrafluoro-4-(trifluoromethyl)phenyl]borane (BTolF) was prepared by treating boron tribromide with tetrameric F₃ CC₆ F₄ -Cu^I . The F₃ CC₆ F₄ -Cu^I 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.

Publication types

Research Support, Non-U.S. Gov't