Crystal structure of 2-tert-butyl-2,3-di-hydro-1H-benzo[c]pyrrol-1-one.

The asymmetric unit of the title compound, C12H15NO, comprises two sym-metry-independent mol-ecules which differ mainly in the conformations of the tert-butyl groups. The mol-ecules contain an essentially planar five-membered 3-pyrroline ring incorporating a carbonyl substituent (pyrrolinone) which forms part of an isoindolinone skeleton. The planarity of the pyrrole ring is compared to other structures with isoindolinone. There are only weak intra- and inter-molecular C-H⋯O and C-H⋯π-electron-ring inter-actions in the crystal structure.