Premium
Tris(perfluorotolyl)borane—A Boron Lewis Superacid
Author(s) -
Körte Leif A.,
Schwabedissen Jan,
Soffner Marcel,
Blomeyer Sebastian,
Reuter Christian G.,
Vishnevskiy Yury V.,
Neumann Beate,
Stammler HansGeorg,
Mitzel Norbert W.
Publication year - 2017
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.201704097
Subject(s) - superacid , borane , boron , tris , lewis acids and bases , chemistry , materials science , organic chemistry , catalysis , biochemistry
Tris[tetrafluoro‐4‐(trifluoromethyl)phenyl]borane (BTolF) was prepared by treating boron tribromide with tetrameric F 3 CC 6 F 4 ‐Cu I . The F 3 CC 6 F 4 ‐Cu I was generated from F 3 CC 6 F 4 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 SbF 5 . The molecular structures of BTolF and BCF were determined by gas‐phase electron diffraction, that of BTolF also by single‐crystal X‐ray diffraction.