Acta Cryst. (2012). E68, o29-o30 [ doi:10.1107/S1600536811051610 ]
Abstract: In the title barbiturate salt (trivial name: trimethylammonium 2,4,6-trinitrophenylbarbiturate), C3H10N+·C10H4N5O9-, the asymmetric unit contains two sets of anion-cation moieties. The dihedral angle between the rings in the anions are 44.0 (3) and 45.7 (3)°. Adjacent anions are connected into ribbons along  through R22(8) ring motifs formed by N-HO hydrogen bonds involving the barbiturate rings. Attached to both sides of these ribbons via N-HO hydrogen bonds are the trimethylammonium cations. C-HO hydrogen bonds are also observed.
Online 7 December 2011
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