Abstract
In the title compound, C
17
H
14
O
2
, the indan-1-one system is almost planar (r.m.s. deviation = 0.007 Å) and the benzene ring is twisted out of its plane by 8.15 (6)°. The conformation about the C=C double bond [1.348 (2) Å] is
E
. Helical supramolecular chains along [010] feature in the crystal packing; these are sustained by C—H⋯O hydrogen bonds and π–π interactions between translationally related indan-1-one systems [centroid–centroid distance = 3.7970 (10) Å].