Acta Cryst. (2006). E62, o2738-o2740  [ doi:10.1107/S1600536806021143 ]

Diethyl 7,12-dihydro-8-iodo-6,13-dioxo-cis-7H,11H-2,4-dioxa-5a,6a,12a,13a-tetraazabenz[f]cycloocta[cd]azulene-13b,13c-dicarboxylate

Y.-F. Chen, Y.-Z. Wang, H.-Z. Guo and Y.-T. Li

Abstract: The title compound, C₂₁H₂₃IN₄O₈, is a glycoluril derivative with five fused rings. An iodobenzene ring is fused to a seven-membered ring which binds two of the N atoms from separate rings of the glycoluril system. The other N atoms are linked via methylene groups to form an eight-membered ring with two ether O atoms separated by an additional methylene group. The crystal structure is stabilized by inversion-related C-H interactions together with C-HO non-classical hydrogen bonds.

Online 14 June 2006

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