resolved to yield the enantiomers in high enantiomeric excess. The molecularstructures of sulfoxide (+)-1, (+)-2, and (+)-3 were determined by X-ray diffraction method, and the absoluteconfiguration of the stereogenic sulfur atom was assigned as (R), (S), and (S), respectively. The actual conformations are discussed including effective S…O close contacts and the relative positions of aromatic rings.