Acta Cryst. (2003). E59, o825-o827  [ doi:10.1107/S1600536803010225 ]

Diethyl N,N'-m-phenylenedioxamate

I. I. Padilla-Martínez, M. Chaparro-Huerta, F. J. Martínez-Martínez, H. Höpfl and E. V. García-Báez

Abstract: The title compound, C₁₄H₁₆N₂O₆, crystallizes in the monoclinic space group, C2/c. C₂ symmetry is imposed on the molecule. The ethyl oxamate groups are twisted out of the aromatic ring plane by 34.53  (6)° and both carbonyl groups are antiperiplanar. The intramolecular hydrogen-bonding pattern is depicted by a soft C-HO/O' three-centered hydrogen bond, and N-HO and C-HO hydrogen-bonding interactions which form an S(5)S(5)S(6)S(6)'S(5)'S(5)' motif. The molecules are linked into C(3) and C(4) chain motifs, forming supramolecular layers in the ac plane.

Online 16 May 2003

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