CRYSTAL AND MOLECULAR-STRUCTURE OF CYCLIC SULFOXIDES - HOXYCARBONYL-3,6-DIHYDRO-4,5-DIMETHYL-2H-THIAPYRAN 1-OXIDE AND -PHENYL-2-METHOXYCARBONYL-3,6-DIHYDRO-2H-THIAPYRAN 1-OXIDE

Crystal and molecular structures of the title compounds 1b and 1c have been determined by the X-ray method Crystals of 1b are monoclinic; sp ace group P2(1)/c, and crystals of 1c are orthorhombic, space group P2 (1)2(1)2(1). The sulfinyl oxygen atom and the alkoxycarbonyl group in both compounds are trans oriented and the six-membered rings adopt a s ofa conformation. The differences between conformation, bond lengths, and angles in the compound investigated ave discussed. (C) 1996 John W iley & Sons, Inc.