B-H, C-H, and B-C Bond Activation: The Role of Two Adjacent Agostic Interactions

摘要

Tuning the nature of the linker in a L-BHR phosphinoborane compound led to the isolation of a ruthenium complex stabilized by two adjacent, δ-C—H and ε-B_(sp2)—H, agostic interactions. Such a unique coordination mode stabilizes a 14-electron "RUH2P2" fragment through connected σ-bonds of different polarity, and affords selective B—H, C-H, and B—C bond activation as illustrated by reactivity studies with H2 and boranes.