Acta Crystallographica Section E

Volume 67, Part 6 (June 2011)

organic compounds

lh5248 scheme

Acta Cryst. (2011). E67, o1409-o1410 [ doi:10.1107/S1600536811017521 ]

2-Amino-3-carboxypyrazin-1-ium dihydrogen phosphate

F. Berrah, S. Bouacida and T. Roisnel

Abstract: In the crystal structure of the title compound, C₅H₆N₃O₂⁺·H₂PO₄^-, the dihydrogen phosphate anions are linked through short O-HO hydrogen bonds, forming infinite double chains running parallel to the b axis. Centrosymetric N-HO hydrogen-bonded cationic dimers form bridges between these chains by means of intermolecular N-HO and O-HO hydrogen bonds, leading to a two-dimensional network parallel to (100) in which R₃³(12), R₄³(10) R₂²(8) and C(4) graph-set motifs are generated. Weak intermolecular C-HO hydrogen bonds connect these layers, forming a three-dimensional network.


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