2,5-Diamino-3,6-dichloropyrazine
by Barclay, T. M.; Cordes, A. W.; Oakley, R. T.; Preuss, K. E.; Zhang, H. Z.
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
- 1018-1019
- URL
- https://dx.doi.org/10.1107/s0108270198001152
- ISBN/ISSN
- 1600-5759; 0108-2701
- DOI
- 10.1107/s0108270198001152