Acta Cryst. (2002). E58, o1185-o1187  [ doi:10.1107/S1600536802017762 ]

DL-Threoninium dihydrogen phosphate

B. Ravikumar, B. Sridhar and R. K. Rajaram

Abstract: In the title compound, C₄H₁₀NO₃⁺·H₂PO₄^-, the threoninium residue forms strong O-HO hydrogen bonds with the phosphate anion. A gauche I-gauche II conformation with respect to the O and C atoms is observed [the corresponding torsion angles are 59.5  (2) and -64.1  (3)°]. The adjacent threoninium cations, related by an a-glide plane normal to the c axis, are linked via N-HO hydrogen bond involving ammonium and carboxylic acid groups (DL2 head-to-tail sequence). The structure is stabilized by an extensive network of O-HO and N-HO hydrogen bonds, which form a three-dimensional hydrogen-bond system.

Online 5 October 2002

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