2-[(5′-Chloro-1,1′:3′,1′′-terphenyl-4′-yl)imino]­acenaphthylen-1(2H)-one

The title compound, C(30)H(18)ClNO, is a product of the condensation reaction of acenaphthyl­ene-1,2-dione and 5′-chloro-1,1′:3′,1′′-terphenyl-4′-amine. The acenaphthyl­ene fragment and two terminal phenyl rings are rotated relative to the central benzene ring by 72.2 (3), 43.2 (3) and 41.2 (3)°, respectively. This mol­ecular conformation is supported by weak C—H⋯π inter­actions. In the crystal, mol­ecules form centrosymmetric dimers by the stacking inter­actions between two neighboring acenaphthyl­ene fragments, with an inter­planar distance of 3.365 (3) Å. The dimers are bound to each other by weak C—H⋯N and C—H⋯π inter­actions, forming a three-dimensional framework.