Carbon dioxide capture and functionalization by bis(N-heterocyclic carbene)-borylene complexes

Jun Fan, An-Ping Koh, Chi-Shiun Wu, Ming- Der Su and Cheuk-Wai So ()
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Jun Fan: Nanyang Technological University
An-Ping Koh: Nanyang Technological University
Chi-Shiun Wu: National Chiayi University
Ming- Der Su: National Chiayi University
Cheuk-Wai So: Nanyang Technological University

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Derivatives of free monocoordinated borylenes have attracted considerable interest due to their ability to exhibit transition-metal-like reactivity, in particular small molecules capture. However, such complexes are rare as the formation is either endergonic, or the resulting adduct is a transient intermediate that is prone to reaction. Here, we present the synthesis of two bis(N-heterocyclic carbene)-borylene complexes capable of capturing and functionalizing carbon dioxide. The capture and subsequent functionalization of CO2 by the bis(NHC)-disilylamidoborylene 1 is demonstrated by the formation of the bis(NHC)-isocyanatoborylene-carbon dioxide complex 3. Reversible capture of CO2 is observed using the bis(NHC)-mesitylborylene 2, and the persistent bis(NHC)-mesitylborylene-carbon dioxide adduct 4 can be stabilized by hydrogen bonding with boric acid. The reactions of 4 with ammonia-borane and aniline demonstrate that the captured CO2 can be further functionalized.

Date: 2024
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DOI: 10.1038/s41467-024-47381-7

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