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Bis(imino)carbazolate a master key for barium chemistry

Abstract : Reported here is a readily available bis(imino)carbazole-based proligand that constitutes a convenient entry point into the challenging synthetic molecular chemistry of barium. It enables the preparation of rare or even, up to now, unknown, solution-stable heteroleptic barium complexes. The syntheses and structural features for the first molecular barium fluoride and the first barium stannylide, with an unsupported Ba-Sn bond, are described, along with other carbazolate barium species: an amide (both a remarkably stable starting material and an excellent hydrophosphination precatalyst), iodide, and silanylide. DFT analysis of bonding patterns in the barium stannylide and barium silanylide highlights a prevailingly ionic barium-tetrelide bond with a small covalent contribution.
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Submitted on : Wednesday, March 18, 2020 - 10:24:07 AM
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Peter Chapple, Samia Kahlal, Julien Cartron, Thierry Roisnel, Vincent Dorcet, et al.. Bis(imino)carbazolate a master key for barium chemistry. Angewandte Chemie International Edition, Wiley-VCH Verlag, 2020, 59 (23), pp.9120-9126. ⟨10.1002/anie.202001439⟩. ⟨hal-02498789⟩

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