Received 22 May 2011
The title butterfly-shaped molecule, C11H6N2O2, is folded slightly along the O=CC=O line, the dihedral angle between the two parts being 6.42 (3)°. In the crystal, adjacent molecules are linked through C-HO hydrogen bonds into infinite layers parallel to the ac plane. The layers are further connected into a three-dimensional netweork via - interactions formed between pairs of antiparallel arranged molecules, with a centroid-centroid distance between the central six-membered ring and the benzene ring of 3.4349 (9) Å.
Data collection: APEX2 (Bruker, 2007); cell refinement: SAINT (Bruker, 2007); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001); software used to prepare material for publication: SHELXL97 and publCIF (Westrip, 2010).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: GK2380 ).
The authors thank the University of Malaya for funding this study (FRGS grant No. FP001/2010 A).
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