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organic compounds
The title compound, C12H12N6, is the minor trans product of the preparation of a dihydrotetrazine. Extensive electron delocalization is shown by the planarity of the molecule, except for one pyridyl group twisted out of plane by only 14.1 (1)°. The C=N–N=C fragment has a C—N distance of 1.297 (2) Å and an N—N distance of 1.404 (2) Å. All other C—N distances are close to 1.34 Å, typical of CN bonds. The NH2 groups form hydrogen bonds to pyridyl and hydrazine N atoms of adjacent molecules.