Acta Cryst. (2011). E67, o183 [ doi:10.1107/S1600536810052645 ]
Abstract: In the title compound, C22H16Cl2N2O5, the nearly planar four-membered -lactam ring [maximum deviations of 0.011 (2) for the N atom] makes dihedral angles of 68.34 (13), 83.04 (13) and 3.37 (13)° with the dichloro-, nitro- and methoxyphenyl rings, respectively. The crystal structure is stabilized by C-HO hydrogen-bond interactions. In addition, a - stacking interaction [centroid-centroid distance = 3.6622 (12) Å] is observed between the -lactam and nitrophenyl rings.
Online 18 December 2010
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