Acta Cryst. (2013). E69, o284
[ doi:10.1107/S1600536812051872 ]

(Z)-3-(1-Hydroxy-3-oxobut-1-enyl)-6-nitro-2H-chromen-2-one

N. S. Topno, V. Tangeti, H. S. P. Rao and R. Krishna

Abstract: In the title compound, C₁₃H₉NO₆, the coumarin system has the benzene ring aligned at 0.61 (18)° with respect to the pyrone ring. An intramolecular O-HO hydrogen bond stabilizes the molecular conformation and a C-HO contact also occurs. In the crystal, weak C-HO interactions link the molecules, forming inversion dimers.

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