O-Ethyl S-{(S)-1-oxo-1-[(R)-2-oxo-4phenyloxazolidin-3-yl]propan-2-yl} carbonodithioate

In the title compound, C15H17NO4S2, synthesized by addition of O-ethylxanthic acid potassium salt to a diastereomeric mixture of (4R)-3-(2-chloropropanoyl)-4-phenyloxazolidin-2one, the oxazolidinone ring has a twist conformation on the C-C bond. The phenyl ring is inclined to the mean plane of the oxazolidinone ring by 76.4 (3)degrees. In the chain the methine H atom is involved in a C-H center dot center dot center dot S and a C-H center dot center dot center dot O intramolecular interaction. In the crystal, molecules are linked by C-H center dot center dot center dot pi interactions, forming chains along [001]. The S configuration at the C atom to which the xanthate group is attached was determined by comparison to the known R configuration of the C atom to which the phenyl group is attached.