The trans diastereoisomers of 2-oxo-4(S)-phenyl-1,3,2-dioxathiolane and meso-2-oxo-4,5-diphenyl-1,3,2-dioxathiolane have been unambiguously identified by X-ray analysis; both adopt the half-chair conformation an differential endocyclic S–O bond lengths provide evidence for a stereoelectronic interaction with the S![[double bond, length half m-dash]](https://www.rsc.org/images/entities/char_e006.gif)
O group.
G. Lowe, S. J. Salamone and R. H. Jones, J. Chem. Soc., Chem. Commun., 1984, 262 DOI: 10.1039/C39840000262
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