Crystal structure of 1,2-bis­(4-fluoro­phen­yl)-1-hy­droxy-2,3,8-tri­meth­oxy­acenaphthene: formation of a five-membered intra­molecular O—H⋯O hydrogen-bonded ring

The structure of the title compound, C27H22F2O4, at 193 K has triclinic (P\overline{1}) symmetry. The hy­droxy and meth­oxy groups at the 1,2-positions of the acenaphthene core display a cis configuration. Both substituents are involved in the formation of a five-membered intra­molecular O—H⋯O hydrogen-bonded ring. The 4-fluoro­phenyl rings make dihedral angles of 87.02 (7) and 51.86 (8)° with the naphthalene ring system. In the crystal, a pair of non-classical C—H⋯O hydrogen bonds forms centrosymmetric dimeric structures. The dimeric aggregates are linked in the ac plane through non-classical C—H⋯F hydrogen bonds and C—H⋯π interactions.