4-Acetyl-3-[2-(ethoxycarbonyl)phenyl]sydnone

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.