Received 23 June 2011
In the crystal structure of the title compound, C14H12O3, the molecules form classical O-HO hydrogen-bonded carboxylic acid dimers. The dihedral angle between the two rings is 80.9 (3)°.
For related structures, see: Shi et al. (2011); Raghunathan et al. (1982); Zhang (2011). For the synthesis of the title compound, see: Pellon et al. (1995). For bond-length data, see: Allen et al. (1987).
Data collection: CAD-4 Software (Enraf-Nonius, 1985); cell refinement: CAD-4 Software; data reduction: XCAD4 (Harms & Wocadlo, 1995); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HG5059 ).
The author gratefully acknowledges financial support from the Scientific Research Foundation for High-Level Personnel, Yulin University (11 GK03) and the Collaboration Programs of Yulin City and Universities and thanks Professor Hua-Qin Wang of the Analysis Center, Nanjing University, for providing the Enraf-Nonius CAD-4 diffractometer and data set for this research project.
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