N,N-Diethyl­anilinium 5-(2,4-dinitro­phen­yl)-2,6-dioxo-1,2,3,6-tetra­hydro­pyrimidin-4-olate

The asymmetric unit of the title mol­ecular salt, C₁₀H₁₆N⁺·C₁₀H₅N₄O₇⁻ (trivial name: N,N-diethyl­anilinium 2,4-dinitro­phenyl­barbiturate), comprises two anion–cation units. In the anions, the dinitro­phenyl ring and the mean plane of the barbiturate ring [planar to within 0.011 (2) and 0.023 (2) Å in the two anions] are inclined to one another by 41.47 (9) and 45.12 (9)°. In the crystal, the anions are linked via strong N—H...O hydrogen bonds, forming chains propagating along [10-1]. Within the chains, adjacent inversion-related anionic barbiturate entities are joined through R₂²(8) ring motifs. The cations are linked to the chains via N—H...O hydrogen bonds. The chains are linked via a number of C—H...O inter­actions, forming a three-dimensional structure.