D. Grossie, L. Harrison, K. Turnbull
Oct 19, 2013
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Journal
Acta Crystallographica Section E: Structure Reports Online
Abstract
Sydnones, which contain a mesoionic five-membered heterocyclic ring, are more stable if synthesized with an aromatic substutuent at the N3 position. In the title compound {systematic name: 4-acetyl-3-[2-(ethoxycarbonyl)phenyl]-1,2,3-oxadiazol-3-ylium-5-olate}, C13H12N2O5, the aromatic substitutent is 2-(ethoxycarbonyl)phenyl. Intra- and intermolecular hydrogen bonds are observed. The interplanar angle between the sydnone and benzene rings is 71.94 (8)°. π-ring⋯carbonyl interactions of 3.2038 (16) Å arise between the sydnone ring and a symmetry-related C=O group.