Received 6 November 2012
aSchool of Physics, Bharathidasan University, Tiruchirappalli 620 024, India,bDepartment of Physics and Nanotechnology, SRM University, Kattankulathur 603 203, India, and cDepartment of Bioinformatics, School of Chemical and Biotechnology, SASTRA University, Thanjavur 613 401, India
Correspondence e-mail: email@example.com
In the title compound, C2H5NO2·C8H6O4, the glycine molecule exists as a zwitterion (2-azaniumylethanoate) with a positively charged amino group and a negatively charged carboxylate group. In the crystal, N-HO and O-HO hydrogen bonds link the components into layers parallel to the ab plane. The central part of each layer is composed of hydrogen-bonded glycine zwitterions, while phthalic acid molecules interact with the zwitterions in such a way that benzene rings protrude up and down from the layer.
For related structures, see: Losev et al. (2011); Herbstein et al. (1981). For graph-set motifs, see: Bernstein et al. (1995). For head-to-tail hydrogen bonds, see: Sharma et al. (2006); Selvaraj et al. (2007).
Data collection: EXPOSE in IPDS-I Software (Stoe & Cie, 2000); cell refinement: CELL in IPDS-I Software; data reduction: INTEGRATE in IPDS-I Software; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009) and ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: SHELXL97.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: CV5360 ).
TB thanks the University Grants Commission (UGC) for the award of a Research Fellowship under the Faculty Improvement Programme (FIP). We are grateful to Professor Helen Stoeckli-Evans, University of Neuchâtel, Switzerland, for measuring the X-ray diffraction data. ST thanks the management of SASTRA University for their encouragement.
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