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The synthesis and crystal structure of 2,5-diamino-3,6-dichloropyrazine, C4H4Cl2N4, are described. The centrosymmetric molecule has an exocyclic C—N distance of 1.362 (3) Å, and a nearly planar amine group [the angles at N sum to 351 (2)°]. Within the crystal, the molecules form a ribbon through two centrosymmetric pairs of N—H...N hydrogen-bond interactions, where the N...N distance is 3.110 (3) Å.

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablocks global, fr1107

hkl

Structure factor file (CIF format)
Contains datablock fr1107

CCDC reference: 130180

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