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

In the title mol­ecule, C(17)H(11)F(3)O, 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 R (2) (1)(6) and R (2) (2)(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.