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Updated: Feb 26, 2026

Characterizing Lewis Pairs Using Titration Coupled with In Situ Infrared Spectroscopy
Published on: February 20, 2020
Design and reactions of a carbon Lewis base/boron Lewis acid frustrated Lewis pair
Jennifer Möricke1, Birgit Wibbeling1, Constantin G Daniliuc1
1Organisch-Chemisches Institut, Universität Münster, Corrensstrasse 40, 48149 Münster, Germany.
Abstract:
The conjugated dienamine 4 selectively adds Piers' borane [HB(C6F5)2] to give the enamine/borane system 5, which features a boratirane structure by internal enamine carbon Lewis base to boron Lewis acid interaction. Compound 5 behaves as a C/B frustrated Lewis pair and undergoes typical addition reactions to benzaldehyde, several nitriles and to sulfur dioxide.This article is part of the themed issue 'Frustrated Lewis pair chemistry'.
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