(E)-2-[4-(Trifluoromethyl)benzylidene]-2,3-dihydro-1H-inden-1-one

In the title molecule, C17H11F3O, the indan ring system and the trifluoromethyl-substituted benzene ring are approximately individually planar and form a dihedral angle of 1.81 (5)° with each other. In the crystal, molecules are linked by pairs of weak bifurcated (C—H)2...O hydrogen bonds to form centrosymmetric dimers, generating R21(6) and R22(10) ring motifs. These dimers are connected by further weak C—H...O hydrogen bonds into one-dimensional chains along the b axis. Weak C—H...π interactions are also present.