The Lewis acid B(C₆F₅)₃ has been found to be an efficient catalyst for the direct hydrogenation of imines and the reductive ring-opening of aziridines with H₂ under mild conditions; addition of a bulky phosphine allows for the reduction of protected nitriles.

Mild thermolysis of Lewis base stabilized phosphinoborane monomers R¹R²PBH₂⋅NMe₃ (R¹,R²=H, Ph, or tBu/H) at room temperature to 100 °C provides a convenient new route to oligo‐ and polyphosphinoboranes [R¹R²P‐BH₂]_n. The polymerization appears to proceed via the addition/head‐to‐tail polymerization of short‐lived free phosphinoborane monomers, R¹R²P‐BH₂. This method offers access to high molar mass materials, as exemplified by poly(tert‐butylphosphinoborane), that are currently inaccessible using other routes (e.g. catalytic dehydrocoupling).