GEOMETRY AND CONFORMATION OF CRYSTALLINE FORMS OF BETA-NAPHTHOXY-SUBSTITUTED 2-THIO-1,3,2-OXATHIAPHOSPHOLANES AND 2-THIO-1,3,2-DITHIAPHOSPHOLANES

Three compounds (1, 2, and 3) containing 1,3,2-oxathiaphospholane and 1,3,2-dithiaphospholane rings were subjected to structural studies by the X-ray method. Compounds 1 and 3 attain a half-chair conformation, whereas, for compound 2, an envelope conformation of the five-membered heterocyclic ring was found in the solid state. For all three compoun ds, a site occupation of some structural elements in a unit cell was o bserved.