1,3-Dicyclohexylimidazolidine-2,4,5-trione: a second polymorph
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چکیده
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.
منابع مشابه
1,3-Dicyclohexylimidazolidine-2,4,5-trione
The title compound, C(15)H(22)N(2)O(3), has been isolated as a by-product of an oxidative cleavage of the C-C bond linking two five-membered rings of 1,3-dicyclo-hexyl-5-(3-oxo-2,3-dihydro-benzofuran-2-yl)imidazolidine-2,4-dione. Individual mol-ecular units are engaged in weak C=O⋯C=O inter-actions [O⋯C = 2.814 (10) and 2.871 (11) Å], leading to the formation of supra-molecular chains which clo...
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