1-tert-Butyl-2-methyl­phospho­lane–borane and its coupling product 2,2′-bis(1-tert-butyl­phospho­lane–borane)

The title compound, C₉H₂₂BP, and its coupling product, C₁₆H₃₈B₂P₂, were synthesized and their crystal structures analyzed by X-ray diffraction. The molecular structures clearly explain the stereoselective reaction pathways leading to the products. The average P—B distance and C—P—B angle are 1.929 Å and 114°, respectively.