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Harnessing transient CAAC-stabilized mesitylborylenes for chalcogen activation

Michel, Maximilian, Endres, Lukas, Fantuzzi, Felipe, Krummenacher, Ivo, Braunschweig, Holger (2025) Harnessing transient CAAC-stabilized mesitylborylenes for chalcogen activation. Chemical Science, . ISSN 2041-6539. (doi:10.1039/d5sc00154d) (KAR id:108930)

Abstract

Newly synthesized adducts of CAAC-bound mesitylborylene with carbon monoxide (CO) and trimethylphosphine (PMe3) are established as efficient precursors for the in situ generation of the dicoordinate borylene [(CAAC)BMes] (CAAC = cyclic(alkyl)(amino)carbene), as demonstrated by their ability to activate elemental chalcogens. Upon thermal or photolytic activation, these precursors readily react with sulfur and selenium, yielding boron chalcogenides characterized by terminal boron–chalcogen double bonds. In contrast, the reaction with tellurium leads to the formation of an unusual diradical ditelluride species with a Te–Te bond. Quantum chemical calculations of its electronic structure indicate an open-shell singlet ground state characterized by significant diradical character. Further investigations into the redox behavior of these boron chalcogenides reveal intriguing transformations, including the redox-induced formation and cleavage of E–E bonds.

Item Type: Article
DOI/Identification number: 10.1039/d5sc00154d
Subjects: Q Science > QD Chemistry
Divisions: Divisions > Division of Natural Sciences > Chemistry and Forensics
Funders: University of Würzburg (https://ror.org/00fbnyb24)
Deutsche Forschungsgemeinschaft (https://ror.org/018mejw64)
SWORD Depositor: JISC Publications Router
Depositing User: JISC Publications Router
Date Deposited: 04 Mar 2025 14:24 UTC
Last Modified: 05 Mar 2025 10:07 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/108930 (The current URI for this page, for reference purposes)

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