2,5-Diamino-3,6-dichloropyrazine

by Barclay, Tosha Madeva; Cordes, A. Wallace; Oakley, Richard T.; Preuss, Kathryn E.; Zhang, Hongzhou

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) Angstrom and a nearly planar amine group [the angles at nitrogen sum to 351(2)degrees]. 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) Angstrom.

Journal
Acta Crystallographica Section C-Crystal Structure Communications
Volume
54
Year
1998
Start Page
1018
ISBN/ISSN
2053-2296; 0108-2701
DOI
10.1107/S0108270198001152