Acta Cryst. (2013). E69, o398-o399 [ doi:10.1107/S1600536813004352 ]
Abstract: In the anion of the title salt, C10H16N+·C10H4ClN4O7- [trivial name = N,N-diethylanilinium 5-(3-chloro-4,6,-dinitrophenyl)barbiturate], the dihedral angle between the benzene and pyrimidine rings is 45.49 (6)°. The mean plane of the nitro group, which is ortho-substituted with respect to the pyrimidine ring, is twisted by 41.57 (13)° from the benzene ring, while the mean plane of the nitro group, which is para-substituted, is twisted by 14.41 (12)° from this ring. In the crystal, N-HO hydrogen bonds link cations and anions into chains along [1-10]. Within the chains, inversion-related anionic barbiturate anions form R22(8) ring motifs.
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