3,5-Di­fluoro-4-nitro­pyridine N-oxide and 3,5-di­amino-4-nitro­pyridine N-oxide monohydrate

The mol­ecule of 3,5-di­fluoro-4-nitro­pyridine N-oxide, C₅H₂F₂N₂O₃, is twisted around the C—NO₂ bond by 38.5 (1)°, while the 3,5-di­amino analogue, 3,5-di­amino-4-nitro­pyridine N-oxide monohydrate, C₅H₆N₄O₃·H₂O, adopts a planar conformation stabilized by intramolecular hydrogen bonds, with a significant redistribution of π electrons.