3-Aminopyrazine-2-carboxylic Acid

3-Aminopyrazine-2-carboxylic acid, C₅H₅N₃O₂, displays an extensive network of intra- and intermolecular hydrogen bonds which are undoubtedly responsible for the modest values of the displacement parameters. H-atom transfer to the ring N atoms did not occur and the carboxyl and amino H atoms are ordered. The virtually planar molecules lie very nearly in planes parallel to (10) and are stacked along a with separations of 3.324 (2) Å indicating π–π interactions.

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