Acta Cryst. (2013). E69, o1226 [ doi:10.1107/S1600536813018084 ]
Abstract: In the title compound, C21H15Cl2NO2, the H atom of the -OH group is transferred to the N atom of the imine, forming a zwitterion. Thus, there is formation of a six-membered ring via an intramolecular OH-N, rather than O-HN, hydrogen bond in the molecule. The dihedral angle between the naphthalene ring system and the benzene ring of the 2H-chromen system is 87.41 (4)°. In the crystal, the molecules are packed through N-HO, - [centroid-centroid distances = 3.744 (3) and 3.780 (3) Å], C-Cl [Clcentroid = 3.261 (3) Å], C-H and C-HO interactions.
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