Acta Cryst. (2002). E58, o779-o781  [ doi:10.1107/S1600536802010656 ]

L-Methionine L-methioninium perchlorate monohydrate

B. Sridhar, N. Srinivasan, B. Dalhus and R. K. Rajaram

Abstract: In the title compound, C₅H₁₂NO₂S⁺·ClO₄^-·C₅H₁₁NO₂S·H₂O, the L-methionine and L-methioninium residues are linked by a strong OO hydrogen bond [2.500  (1)  Å]. The methionine residue adopts a trans-gauche I-gauche I conformation, while the methioninium residue has a gauche II-trans-gauche I conformation. The methioninium residues in the crystal are engaged in straight (S1) head-to-tail hydrogen bonding, thus forming infinite chains along the b axis.

Online 21 June 2002

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