ArticleOrganometallics2025
Flash Communication: Bismuthinidenes as Lewis Bases in Reversible C(sp
Article in Organometallics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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5 authors.
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Abstract
Herein, we describe a unique example of a low-valent monocoordinated Bi-(I) complex acting as a Lewis base partner in a FLP activation reaction. The interplay between a bulky and rigid Bi-(I) and the Lewis acidic tris-(pentafluorophenyl)-borane (BCF) enables the opening of tetrahydrofuran (THF), delivering a zwitterionic Bi-(+)/B(-) product, which could be isolated and characterized spectroscopically and through SC-XRD. The zwitterionic bismuth complex exhibits remarkable spectroscopic features in the visible range, namely an LMCT band corresponding to the transition from the aromatic fluorene to the highly electron-poor cationic bismuth center. Interestingly, excitation of this band results in ring-closing C-O bond formation and subsequent recovery of the Bi-(I), thus constituting a photoreversible FLP activation with bismuth.
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