No abstract

In the title mol­ecular salt, C6H16NO+·C10H4N5O9 −·2H2O, which crystallizes as a dihydrate, O—H⋯O hydrogen bonds link the barbiturate anion, the ethanaminium cation and the water mol­ecules of crystallization. The dihedral angle between the rings in the anion is 43.71 (8)°. In the crystal, an R 2 2(8) ring motif hydrogen-bonding pattern is also found involving inversion-related barbiturate rings with N—H⋯O hydrogen bonds. As a result of the various hydrogen bonds an infinite two-dimensional network, propagating in (10), is formed.

No 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 [100] through R 2 2(8) ring motifs formed by N—H⋯O hydrogen bonds involving the barbiturate rings. Attached to both sides of these ribbons via N—H⋯O hydrogen bonds are the trimethyl­ammonium cations. C—H⋯O hydrogen bonds are also observed.

Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.004 Å; R factor = 0.046; wR factor = 0.110; data-to-parameter ratio = 13.0.In the title compound, C 12 H 6 N 4 O 8 S, the dinitrophenyl rings subtend an angle of 78.46 (13) . In the crystal, molecules are linked by weak C-HÁ Á ÁO hydrogen bonds leading to the formation of a two-dimensional network lying parallel to the bc plane. Related literature