title: 6-Bromo-1-butylindoline-2,3-dione.
abstract: There are two independent mol-ecules in the asymmetric unit of the title compound, C(12)H(12)BrNO(2). The C-C bond lengths of the two carbonyl C atoms of the five-membered rings are distinctly longer than a normal Csp(2)-Csp(2) single bond. One of the mol-ecules makes parallel self-coupled (inversion) dimers by π-π inter-actions with phen-yl-phenyl inter-planar distances of 3.403 (2) Å. The other mol-ecule also forms self-dimers at longer phen-yl-phenyl plane distances [3.649 (2) Å]. In the crystal, a C-H⋯O interaction is seen.
authors.forename: Lei
authors.initials: L
authors.lastname: Ji
authors.forename: Qi
authors.initials: Q
authors.lastname: Fang
authors.forename: Jian-Dong
authors.initials: JD
authors.lastname: Fan