The Triphenylphosphine-Sulphur Trioxide Complex: Confirmation of Structure
The structure of the triphenylphosphine-sulphur trioxide complex has been established by X-ray crystallography which shows that the complex contains a phosphorus-sulphur bond and demonstrates the way in which the sulphur atom is shielded by the three aromatic rings.
Galpin, Ian J.,Kenner, George W.,Marston, Andrew,Mills, Owen S.