Acta Cryst. (2009). E65, o2508-o2509  [ doi:10.1107/S1600536809037313 ]

Guanidinium 3-carboxy-2,3-dihydroxypropanoate monohydrate

M. T. M. Al-Dajani, H. H. Abdallah, N. Mohamed, J. H. Goh and H.-K. Fun

Abstract: In the title hydrated salt, CH₆N₃⁺·C₄H₅O₆^-·H₂O, the deprotonated carboxyl group is disordered over two positions with a site-occupancy ratio of 0.945 (3):0.055 (3). The bond lengths in the guanidinium cation are intermediate between normal C-N and C=N bond lengths, indicating significant delocalization in this species. In the crystal structure, anions and water molecules are linked into sheets parallel to the ab plane by intermolecular O-HO hydrogen bonds. The linking of the anions and water molecules with the cations by intermolecular N-HO hydrogen bonds creates a three-dimensional network.

Online 19 September 2009

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