Received 18 July 2010
aDepartment of Physics, Madurai Kamaraj University, Madurai 625 021, India,bDepartment of Physics, The Madura College, Madurai 625 011, India, and cDepartment of Food Science and Technology, University of Ruhuna, Mapalana, Kamburupitiya (81100), Sri Lanka
Correspondence e-mail: email@example.com
In the title compound, C4H8N2O3·C4H6O6, the amino acid molecule exists as a zwitterion and the carboxylic acid in an un-ionized state. The tartaric acid molecules are linked into layers parallel to the ab plane by O-HO hydrogen bonds. The amino acid molecules are also linked into layers parallel to the ab plane by N-HO and C-HO hydrogen bonds. The alternating tartaric acid and amino acid layers are linked into a three-dimensional framework by N-HO and O-HO hydrogen bonds.
Our interest in the determination of the structure of the title compound is due to recent advances in organic non-linear optical (NLO) materials on account of their widespread potential industrial applications. For studies on organic non-linear optical materials, see: Cole et al. (2000); Ravi et al. (1998); Sarma et al. (1997).
Data collection: CAD-4 EXPRESS (Enraf-Nonius, 1994); cell refinement: CAD-4 EXPRESS; data reduction: XCAD4 (Harms & Wocadlo, 1996); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: CI5134 ).
SN thanks the CSIR for the funding provided under the Emeritus Scientist Scheme. JS thanks the management of The Madura College, Madurai, and DST-FIST for funding.
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