In the title compound, C 17H 14O 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 supra-molecular chains along  feature in the crystal packing; these are sustained by C - H⋯O hydrogen bonds and π-π inter-actions between translationally related indan-1-one systems [centroid-centroid distance = 3.7970 (10) Å].
Asiri, A. M., Faidallah, H. M., Al-Nemari, K. F., Ng, S. W., & Tiekink, E. R. T. (2012). (2E)-2-(4-Methoxybenzylidene)-2,3-di-hydro-1H-inden-1-one. Acta Crystallographica Section E: Structure Reports Online, 68(3). https://doi.org/10.1107/S1600536812006940