Crystal structure of 2-[4-(4-chloro-phen-yl)-1-(4-meth-oxy-phen-yl)-2-oxoazetidin-3-yl]benzo[de]iso-quinoline-1,3-dione dimethyl sulfoxide monosolvate.

In the title solvated compound, C28H19N2O4·C2H6OS, the central β-lactam ring is almost planar (r.m.s. deviation = 0.002†à ). It makes dihedral angles of 1.92†(11), 83.23†(12) and 74.90†(10)° with the meth-oxy- and chloro-phenyl rings and the ring plane of the 1H-benzo[de]iso-quinoline-1,3(2H)-dione group [maximum deviation = 0.089†(1)], respectively. An intra-molecular C-H⋯O hydrogen bond closes an S(6) ring and helps to establish the near coplanarity of the β-lactam and meth-oxy-benzene rings. In the crystal, the components are linked by C-H⋯O hydrogen bonds, C-H⋯π inter-actions and aromatic π-π stacking inter-actions [centroid-to-centroid distances = 3.6166†(10) and 3.7159†(10)†à ], resulting in a three-dimensional network, The dimethyl sulfoxide solvent mol-ecule is disordered over two sets of sites in a 0.847†(2):0.153†(2) ratio.