Acta Cryst. (2006). E62, o8-o10  [ doi:10.1107/S1600536805038948 ]

DL-Methionine DL-methioninium picrate

K. Anitha, S. Athimoolam and R. K. Rajaram

Abstract: The asymmetric unit of the title compound, C₅H₁₁NO₂S·C₅H₁₂NO₂S⁺·C₆H₂N₃O₇^-, is composed of two crystallographically independent methionine residues and a picrate anion. The methionine and protonated methioninium residues are bonded through a strong O-HO hydrogen bond, and an inversion-related DL1 head-to-tail sequence along the a axis is observed in the zwitterion. The amino groups of two residues connect to the lone oxygen of two inversion-related picrate anions. Hydrophobic layers are observed in the y = 0 plane.

Online 3 December 2005

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