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Acta Cryst. (2009). E65, o5  [ doi:10.1107/S1600536808039986 ]


J. Zhang, X. Zhang, S. Yan, N. Ma and S. Tu

Abstract: In the molecule of the title compound, C20H11ClN2O3, the pyran ring adopts a flattened-boat conformation. In the crystal structure, intermolecular N-H...N and N-H...O hydrogen bonds generate edge-fused R22(12) and R22(14) ring motifs; the hydrogen-bonded motifs are linked to each other, forming a three-dimensional network. A [pi]-[pi] contact [centroid-to-centroid distance = 3.879 (3) Å] between the chlorophenyl rings may further stabilize the structure.

Online 3 December 2008

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