title: Spiro-[cyclo-propane-1,3'-indolin]-2'-one.
abstract: In the title mol-ecule, C(10)H(9)NO, the dihedral angle between the mean plane of the cyclo-propane ring and the essentially planar [maximum deviation = 0.032 (2) Å] indole ring system is 87.65 (17)°. In the crystal, inter-molecular N-H⋯O hydrogen bonds link mol-ecules into one-dimensional chains along [100].
authors: College of Science, Northwest A&F University, Yangling 712100, Shannxi Province,  People's Republic of China.
authors: Maosen
authors: M
authors: Yuan
authors: Qi
authors: Q
authors: Wang
authors: Yuejun
authors: Y
authors: Zhang
authors: Junru
authors: J
authors: Wang