The Crystal and Molecular Structure of 1-p-Chlorophenyl-4-(tt-a-erythrofuranosyl)-4-imidazoline-2-thione

The title compound, CISOsN2C~sH~3, the definitive formula of which has been established by X-ray structural analysis, is orthorhombic, space group P2~2121 with a= 7.806 (5), b= 29.417 (13) and c= 5-921 (5) A, Z--4. The structure has been solved by direct methods with MULTAN and refined anisotropically (R=0"073) by a method of block-diagonal least-squares with 861 independent reflexions measured on a diffractometer (Cu Ke radiation). The dihedral angle between the phenyl and imidazoline rings is 50 °. The furanose ring is puckered so that C(10) deviates from the mean plane through the other sugar-ring atoms and the dihedral angle between the imidazoline and the furanose rings is 95 °. The packing of the structure is effected by hydrogen bonds.