Bis(imino)carbazolate a master key for barium chemistry

Peter Chapple (1) , Samia Kahlal (1) , Julien Cartron (1) , Thierry Roisnel (1) , Vincent Dorcet (1) , Marie Cordier (1) , Jean-Yves Saillard (1) , Jean-François Carpentier (1) , Yann Sarazin (1)

1 ISCR - Institut des Sciences Chimiques de Rennes

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.

Mots clés: barium; carbazolate; silanylide; stannylide; fluoride

Domaines: Chimie de coordination

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, 2020, 59 (23), pp.9120-9126. ⟨10.1002/anie.202001439⟩. ⟨hal-02498789⟩