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Acta Cryst. (2012). E68, o220  [ doi:10.1107/S1600536811054407 ]


Z.-M. Yang, D.-C. Su and H.-L. Zhu

Abstract: The molecule of the title compound, C16H16N2O4, exists in the E configuration with respect to the central C=N double bond. The dihedral angle between the two benzene rings is 2.17 (9) Å. In the crystal, molecules are linked via O-H...N hydrogen bonds into chains that propagate along the b-axis direction. There is also [pi]-[pi] stacking of inversion-related molecules, with interplanar spacings of 3.479 (5) Å and ring centroid-centroid distances of 3.876 (4) Å.

Online 23 December 2011

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