7-METHANO-7A-P-TOLYSULFINYL-1(3H)-ISOBENZOFURANONE

The molecular structure of the title compound, C18H20O4S, determined f rom the X-ray data confirms the structure previously assigned on the b asis of chemical and spectroscopic evidence. The S atom has the usual distorted tetrahedral configuration. The molecular skeleton of the mol ecule comprises a system of three five-membered rings (A, B and C). Th e A and B rings are cis fused; all three five-membered rings adopt env elope conformations. The crystal structure is stabilized entirely by v an der Waals forces and three C-H...O hydrogen-bond interactions.