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An ortho-rhom-bic polymorph of 6-de-oxy-6-iodo-1,2:3,4-di-O-isopropyl-idene-?-d-galactopyran-oside.

ABSTRACT: The title compound, C(12)H(19)IO(5), is the ortho-rhom-bic 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 mol-ecules into a two-dimensional array parallel to the ab plane.

SUBMITTER: Fun HK

PROVIDER: S-EPMC2977305 | biostudies-literature | 2009 Jul

REPOSITORIES: biostudies-literature

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An ortho-rhom-bic polymorph of 6-de-oxy-6-iodo-1,2:3,4-di-O-isopropyl-idene-α-d-galactopyran-oside.

Fun Hoong-Kun HK Liew Wei-Ching WC Rai Sankappa S Shetty Prakash P Isloor Arun M AM

Acta crystallographica. Section E, Structure reports online 20090725 Pt 8

The title compound, C(12)H(19)IO(5), is the ortho-rhom-bic 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 fi ...[more]

PMID: 21583671

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