3-(3-Chloro­prop­yl)-7,8-dimeth­oxy-1H-3-benzazepin-2(3H)-one at 125 K

In the title compound, C(15)H(18)ClNO(3), the seven-membered ring has a mirror plane passing through the methyl­ene C atom and bis­ecting the C=C bond. It adopts a bent conformation, inter­mediate between the boat and chair forms. Both meth­oxy groups are coplanar with the attached benzene ring [C—C—O—C = −0.5 (3) and 2.2 (3)°]. In the crystal structure, inversion-related mol­ecules are linked via C—H⋯O hydrogen bonds and π–π inter­actions involving the benzene ring [centroid–centroid distance = 3.6393 (12)Å].