Triethyl­ammonium 4-(3,5-dinitro­benzamido)-N-(3,5-dinitro­benzo­yl)benzene­sulfonamidate

The mol­ecular structure of the title salt, C₆H₁₆N⁺·C₂₀H₁₁N₆O₁₂S⁻, shows a planar geometry of the benzamido–phen­yl–sulfonyl moiety, with a dihedral angle of 1.59 (9)° between the aromatic ring planes. The central ring and the aromatic ring of the other dinitro­benzamide group are nearly perpendicular, making a dihedral angle of 89.55 (9)°. All nitro groups lie almost in plane with the associated aromatic rings, the O—N—C—C torsion angles ranging from 9.2 (2) to 24.3 (2)°. In the crystal, strong anion–anion N—H...O and anion–cation hydrogen bonds form inversion dimers stacked along the a axis. Less prominent anion–anion C—H...O inter­actions lead to the formation of a three-dimensional network including anion–anion dimers as well as anion–anion chains along [100?].

N,N′-Bis(4-bromo­phen­yl)pyridine-2,6-dicarboxamide

The mol­ecule of the title compound, C₁₉H₁₃Br₂N₃O₂, lies about a twofold rotation axis. The benzene ring makes dihedral angles of 8.9 (2) and 16.4 (2)° with the central pyridine ring and the second benzene ring, respectively. An intra­molecular N—H...N contact occurs. In the crystal, mol­ecules are connected by pairs of N—H...O hydrogen bonds into chains along the c axis.

N,N′-Bis(4-hy­droxy­phen­yl)pyridine-2,6-dicarboxamide di­methyl­formamide monosolvate

The mol­ecular structure of the pyridine derivative, C₁₉H₁₅N₃O₄·C₃H₇NO, shows almost planar geometry with dihedral angles of 6.9 (1) and 13.4 (1)° between the pyridine ring and the two benzene rings. This conformation is stabilized by two intra­molecular N—H...N(pyridine) bonds. In the crystal, strong O—H...O(carboxamide) and N—H...O(hy­droxy­phen­yl) hydrogen bonds link the mol­ecules, forming a three-dimensional structure. The di­methyl­formamide solvent mol­ecules are not involved in the hydrogen bonding. The structure shows pseudosymmetry, but refinement in the space group Pbcn leads to significantly worse results and a disordered di­methyl­formamide mol­ecule.