Structure cristalline et moléculaire du méthyl-2 thiono-2 dithiaphosphorinane-1,3,2 et du chloro-2 thiono-2 dithiaphosphorinane-1,3,2

Abstract

The crystal and molecular structure of 2-methyl-2-thiono-l,3,2-dithiaphosphorinane (I) and of 2-chloro-2-thiono-l,3,2-dithiaphosphorinane (II) has been determined from X-ray data by a direct method. In both cases, the unit cell is orthorhombic, space group Pbca, with a= 11.156 (3), b= 13.121 (2), c= 11.338 (3) A for (I) and a= 10.919 (3), b= 12-700 (16), c= 11.681 (1) A for (II). The two molecules have a chair conformation, with the P=S bond in the equatorial orientation. The flattening of the ring is smaller than in the corresponding 1,3,2-dioxaphosphorinanes.