In the structure of the title compound, C33H26N2O4, two phthalimide units are symmetrically linked by a bis-(3,5-dimethyl-phen-yl)methane bridge. The methyl-ene C atom of this bridge lies on a twofold rotation axis. The dihedral angle between the planes of the two central benzene rings is 61.4 (4)°. The terminal isoindole group is approximately planar, with an r.m.s. deviation of atoms from the mean plane of 0.012 Å and a dihedral angle of 75.3 (14)° with the attached benzene ring. An extensive network of C - H⋯O hydrogen bonds stabilizes t...
