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Acta Cryst. (2013). E69, o1662
[ doi:10.1107/S1600536813027207 ]


D. Grossie, L. Harrison and K. Turnbull

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)°. [pi]-ring...carbon­yl inter­actions of 3.2038 (16) Å arise between the sydnone ring and a symmetry-related C=O group.

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