N-(4-Bromo­phen­yl)-3,5-dinitro­benzamide

The title mol­ecule, C₁₃H₈BrN₃O₅, is slightly twisted, with the dihedral angle between the two benzene rings being 5.9 (1)°. In the crystal, N—H...O hydrogen bonds link the mol­ecules into one-dimensional chains running along [101]. Further stabilization of the crystal structure is provided by π–π inter­actions [shortest centroid–centroid distance = 3.6467 (17) Å].

Ethyl 2-(3,5-dinitro­benzamido)­benzoate

The title mol­ecule, C₁₆H₁₃N₃O₇, is slightly twisted, with the dihedral angle between the two benzene ring planes being 17.4 (1)°. An intra­molecular N—H...O hydrogen bond is observed. In the crystal, weak C—H...O hydrogen bonds link the mol­ecules into chains along the b axis.