Low-Coordinate Barium Boryloxides: Synthesis and Dehydrocoupling Catalysis for the Production of Borasiloxanes

Erwann Le Coz (1) , Vincent Dorcet (2) , Thierry Roisnel (1) , Sven Tobisch (3) , J-F Carpentier , Yann Sarazin (1)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 SPCTS - Science des Procédés Céramiques et de Traitements de Surface
3 University of Saint Andrews

The first soluble barium boryloxides [Ba]–OB{CH(SiMe3)2} are presented. These mono- or dinuclear complexes feature low coordination numbers, as low as two for [Ba(OB{CH(SiMe3)2}2)2], which is further stabilized by intra- and intermolecular Ba···H3C agostic interactions. Ba–boryloxides and the parent [Ba{N(SiMe3)2}2.(thf)2] catalyze the dehydrocoupling of borinic acids with hydrosilanes, providing borasiloxanes under mild conditions.

Keywords: dehydrocoupling catalysis; Barium; borasiloxane; boryloxide; low-coordinate complex

Domains: Chemical Sciences; Chemical Sciences; Coordination chemistry

Erwann Le Coz, Vincent Dorcet, Thierry Roisnel, Sven Tobisch, J-F Carpentier, et al.. Low-Coordinate Barium Boryloxides: Synthesis and Dehydrocoupling Catalysis for the Production of Borasiloxanes. Angewandte Chemie International Edition, 2018, 57 (36), pp.11747-11751. ⟨10.1002/anie.201807297⟩. ⟨hal-01862088⟩