Acta Cryst. (2003). E59, o857-o859  [ doi:10.1107/S1600536803010560 ]

DL-Valine-fumaric acid (2/1)

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

Abstract: In the title compound, C₅H₁₁NO₂·0.5C₄H₄O₄, the valine molecule exists as a zwitterion and the fumaric acid molecule in the unionized state, forming an adduct, a feature uncommon in similar crystal structures. The fumaric acid molecule has a centre of symmetry and is planar with a trans configuration about the central C=C bond. The fumaric acid molecules have no hydrogen-bonded interactions among themselves and only mediate interactions between DL-valine layers, leading to a three-dimensional network of molecules.

Online 23 May 2003

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