2,8-Dimethylphenoxathiin 10-Oxide.

An important precursor to biologically active compounds, 2,8-dimethylphenoxathiin 10-oxide (C14H12-028), is found to adopt a folded geometry. The dihedral angles between the aromatic rings are 11.8 (2) and 15.4 (2) ° for the two independent molecules, with the S atoms lying out of the ring planes.