Accessing chiral NHC-boranes by abstraction of C6F5 from the B(C6F5)4− weakly coordinating anion

Nicolas Niessen; Abel Idrice Adjieufack; Nikolay Tumanov; Johan Wouters; Benoît Champagne; Guillaume Berionni; Kajetan Bijouard

doi:10.1039/D5DT02919H

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Accessing chiral NHC-boranes by abstraction of C₆F₅ from the B(C₆F₅)₄⁻ weakly coordinating anion

Nicolas Niessen,

†^a Abel Idrice Adjieufack,

†^a Nikolay Tumanov,

^a Johan Wouters,

^a Benoît Champagne,

^a Guillaume Berionni

*^a and Kajetan Bijouard

*^a

Author affiliations

* Corresponding authors

^a Chemistry Department – Namur Institute of Structured Matter – University of Namur, 61 rue de Bruxelles, 5000 Namur, Belgium
E-mail: guillaume.berionni@unamur.be, kajetan.bijouard@ens-lyon.fr

Abstract

The prolonged heating of an N-heterocyclic carbene-stabilised borenium cation resulted in the abstraction of a –C₆F₅ group from its B(C₆F₅)₄⁻ counter-anion. The resulting new chiral NHC-boranes presented an unusual cis/trans isomerism around the newly formed plane. The corresponding borenium cation, due to its Lewis superacidity, is a potentially interesting new chiral organocatalyst.

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DOI: https://doi.org/10.1039/D5DT02919H
Article type: Communication
Submitted: 05 Dec 2025
Accepted: 06 May 2026
First published: 03 Jun 2026
This article is Open Access

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Dalton Trans., 2026, Advance Article

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Accessing chiral NHC-boranes by abstraction of C₆F₅ from the B(C₆F₅)₄⁻ weakly coordinating anion

N. Niessen, A. I. Adjieufack, N. Tumanov, J. Wouters, B. Champagne, G. Berionni and K. Bijouard, Dalton Trans., 2026, Advance Article , DOI: 10.1039/D5DT02919H

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Accessing chiral NHC-boranes by abstraction of C₆F₅ from the B(C₆F₅)₄⁻ weakly coordinating anion

Abstract

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Accessing chiral NHC-boranes by abstraction of C₆F₅ from the B(C₆F₅)₄⁻ weakly coordinating anion

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