Acta Cryst. (2003). E59, o209-o211  [ doi:10.1107/S160053680202295X ]

DL-Phenylalaninium maleate at 123  K

M. Alagar, M. Subha Nandhini, R. V. Krishnakumar, A. Mostad and S. Natarajan

Abstract: In the title compound, C₉H₁₂NO₂⁺·C₄H₃O₄^-, the amino acid molecule exists in the cationic form with a positively charged amino group and an uncharged carboxylic acid group. The maleic acid molecules exits in the mono-ionized state. In the semi-maleate anion, the intramolecular O-HO hydrogen bond is asymmetric. The phenylalaninium cations and the semi-maleate anions form hydrogen-bonded double layers, linked together by N-HO and O-HO hydrogen bonds, extending along [101].

Online 24 January 2003

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