Fun, Hoong-Kun and Liew, Wei-Ching and Rai, Sankappa and Shetty, Prakash and Isloor, Arun M (2009) An orthorhombic polymorph of 6-deoxy-6-iodo-1,2:3,4-di-O-isopropylidene--D-galactopyranoside. Acta Crystallographica Section E Structure Reports , 65 (8). pp. 1999-2000. ISSN 1600-5368

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Abstract

The title compound, C12H19IO5, is the orthorhombic polymorph of a previously reported monoclinic form [Krajewski et al. (1987). Bull. Pol. Acad. Sci. Chem. 35, 91–102]. The dihedral angles between the six-membered ring and the two five-membered rings are 67.66 (14) and 71.79 (13)', whereas the dihedral angle between the five-membered rings is 74.41 (12)', indicating that all three rings are twisted from each other. The six-membered ring has a twist-boat conformation while both of the five-membered rings have envelope conformations. The crystal structure is stabilized by a network of C—H...O contacts linking the molecules into a twodimensional array parallel to the ab plane.

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