title: 3-(Diphenyl-methyl-idene)indolin-2-one.
abstract: The title mol-ecule, C(21)H(15)NO, has an indoline-2-one and two benzene substituent groups which are arranged in a propeller-like fashion around the central C atom. The dihedral angle between the two benzene rings is 73.32 (16)° and those between the benzene rings and the indoline-2-one group are 76.54 (14) and 67.69 (14)°. In the crystal, there is an inter-molecular N-H⋯O hydrogen-bonding inter-action, which links the mol-ecules into chains extending along c.
authors.affiliation: College of Science, Northwest A&F University, Yangling 712100, Shannxi Province,  People's Republic of China.
authors.forename: Maosen
authors.initials: M
authors.lastname: Yuan
authors.forename: Qi
authors.initials: Q
authors.lastname: Wang
authors.forename: Shujun
authors.initials: S
authors.lastname: Zhang
authors.forename: Peng
authors.initials: P
authors.lastname: Gao
authors.forename: Junru
authors.initials: J
authors.lastname: Wang
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