Acta Cryst. (2009). E65, o5 [ doi:10.1107/S1600536808039986 ]
Abstract: In the molecule of the title compound, C20H11ClN2O3, the pyran ring adopts a flattened-boat conformation. In the crystal structure, intermolecular N-HN and N-HO 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 - 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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