Article Dans Une Revue Dalton Transactions Année : 2025

σ-BH activation of NHC → BH3 fragments in dinuclear Cu complexes

Résumé

We explored herein the coordination properties of the bis(phosphine)NHC → BH3 ligand toward cationic and neutral Cu centres. The synthesis of three dinuclear Cu complexes featuring σ-BH interactions is reported. Noticeably, in each Cu complex, a BH moiety bridges two Cu centres via two σ-BH interactions in a μ2–η1η1 BH coordination mode. NMR, IR, deuterium incorporation and X-ray diffraction analyses, supported by DFT investigation, enabled us to finely measure the level of activation of the B–H bond depending on the coordination environment. The study shows a gradual increase of activation whether the BH fragment is involved in none, one or two σ-BH interactions with Cu centres.

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hal-05131715 , version 1 (26-06-2025)

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Aurèle Camy, David Martins-Bessa, Laure Vendier, Israel Fernández, Sébastien Bontemps. σ-BH activation of NHC → BH3 fragments in dinuclear Cu complexes. Dalton Transactions, 2025, 54 (18), pp.7333-7339. ⟨10.1039/D5DT00586H⟩. ⟨hal-05131715⟩
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