Triphenylstibine
Triphenylstibine is the chemical compound with the formula Sb3. Abbreviated SbPh3, this colourless solid is often considered the prototypical organoantimony compound. It is used as a ligand in coordination chemistry and as a reagent in organic synthesis.
Like the related molecules triphenylphosphine and triphenylarsine, SbPh3 is pyramidal with a propeller-like arrangement of the phenyl groups. The Sb-C distances average 2.14-2.17 Å and the C-Sb-C angle are 95°.
SbPh3 was first reported in 1886, being prepared from antimony trichloride by the reaction:
An alternative method treats phenylmagnesium bromide with SbCl3.
