The crystal and molecular structure of tricyclohexylphosphine(trimethylsilyl)borane Cy3P * BH2SiMe3

Article abstract of DOI:10.1016/0022-328X(93)83347-X

The crystal and molecular structures of the title compound have been determined by a single crystal X-ray diffraction study.This compound is one of the rare species with a discrete silicon-boron two-centre/two-electron bond involving tetra-coordinate boron.The B-P bond length, 1.913(4) Angstroem, is therefore an important reference value.The conformations at the phosphorus, boron and silicon atoms can be described as fully staggered.The valence angle P-B-Si, 122.1(2)^o, is rather large, indicating the presence of steric interactions between the bulky Me3Si and Cy3P groups.