ArticleActa crystallographica. Section E, Structure reports online2012
1,3-Dicyclo-hexyl-imidazolidine-2,4,5-trione: a second polymorph.
Article in Acta crystallographica. Section E, Structure reports online, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The title compound, C(15)H(22)N(2)O(3), was obtained as a by-product of oxidative cleavage of 1,3-dicyclo-hexyl-(3-oxo-2,3-dihydro-benzofuran-2-yl)imidazolidine-2,4-dione. Herein, we report the crystal structure of a second polymorph, which was obtained by crystallization from an ethanol solution at 253 K, instead of slow evaporation of the same solvent at room temperature. While the first polymorph [Talhi et al. (2011). Acta Cryst. E67, o3243] crystallized in the non-centrosymmetric space group P2(1)2(1)2(1), this second polymorph crystallizes in the centrosymmetric space group P2(1)/n. Compared to the first polymorph, in the crystal no C=O⋯C=O inter-actions were found (C⋯O inter-molecular distance longer than 3.15 Å) and instead, close packing of individual mol-ecular units is mediated by C-H⋯π and weak C-H⋯O inter-actions.
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