W. Wieczorek, A. Trzesowska, R. Kruszyński
Oct 1, 2005
Acta Crystallographica Section E: Crystallographic Communications
The asymmetric unit of the title compound, C27H27OPS2·0.5C6H6, is composed of a heterocyclic molecule and one half-benzene ring, the solvent molecule being located on a centre of inversion. The 16-membered ring has an irregular −ap, −ap, +sp, +ac, −sc, +ap, −ap, −sc, +ap, −ap, +sc, +sp, −ap, +ap, +sp, −ac conformation. The phosphorus tetrahedron exhibits its usual deformation, with C—P—C angles smaller than the usual tetrahedral value of 109.5° and O—P—C angles greater than this value. In the structure, there is a stacking interaction between the P-bonded benzene rings. Furthermore, there is a weak intermolecular C—H⋯O hydrogen bond. In this way, a hydrogen-bonded chain is created along the crystallographic a axis.