1:1 Molecular Complex of 2-Amino-5-nitropyridine and 3-Nitro-2-pyridone

The 2-amino-5-nitropyridine molecule of the title complex, C₅H₅N₃O₂.C₅H₄N₂O₃, is planar while the nitro group in 3-nitro-2-pyridone is tilted away from the mean plane by 27.9 (3)°. The C—C bond distance between the substituted atoms in the pyridone ring, 1.439 (3) Å, is slightly lengthened due to the electron-withdrawing effect of the adjacent carbonyl and nitro groups. The molecules are linked into centrosymmetric tetra­mers which are stacked in layers along the c axis. The layers are held together by weak C—H...O hydrogen bonds and van der Waals interactions.

-1