2-(Nitroamino)pyridine

In the title compound, C₅H₅N₃O₂, the amino H atom was localized in the vicinity of the endocyclic N atom at a distance of 0.94 (2) Å, showing that the compound exists in the form of a zwitterion. Bond lengths and molecular planarity [within 0.048 (1) Å] correspond to an overall [pi]-conjugated system. The molecules are coupled as centrosymmetric dimers through short N_endo-H...N_exo hydrogen bonds.

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