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 two-dimensional array parallel to the ab plane.

Highlights

  • The title compound, C12H19IO5, is the orthorhombic polymorph of a previously reported monoclinic form [Krajewski et al (1987)

  • 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

  • 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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Summary

Mo K radiation

USM, Penang, Malaysia, bSyngene International Ltd, Biocon Park, Plot Nos. 2 & 3, Bommasandra 4th Phase, Jigani Link Rd, Bangalore 560 100, India, cDepartment of Printing, Manipal Institute of Technology, Manipal 576 104, India, and dDepartment of Chemistry, National Institute of Technology-Karnataka, Surathkal, Mangalore. R factor = 0.035; wR factor = 0.096; data-to-parameter ratio = 45.0. The title compound, C12H19IO5, is the orthorhombic polymorph of a previously reported monoclinic form [Krajewski et al (1987). 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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