(IUCr) Crystallography Journals Online

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Acta Cryst. (2005). E61, o589-o591 [ doi:10.1107/S1600536805003491 ]

DL-Phenylalanine DL-phenylalaninium picrate

K. Anitha and R. K. Rajaram

Abstract: In the title compound, C₉H₁₁NO₂·C₉H₁₂NO₂⁺·C₆H₂N₃O₇^-, the phenylalanine cation forms a strong O-HO hydrogen bond with a phenylalanine zwitterion and is involved in a DL1 head-to-tail sequence. Each of the phenylalanine residues adopts a folded conformation. In the crystal structure, the hydrophobic double layers are aggregated about the y = 0 plane and sandwiched between hydrophilic layers about the y = ${1\\over 2}$ plane.

Online 12 February 2005