title: 1,1'-(Phenyl-methyl-ene)dinaphthalen-2-ol.
abstract: In the title compound, C(27)H(20)O(2), the phenyl ring is oriented with respect to the naphthalene ring systems at 57.87 (6) and 85.12 (6)°. The two naphthalene ring systems make a dihedral angle of 70.10 (4)°. In the mol-ecule, the hy-droxy groups are involved in a strong intra-molecular O-H⋯O hydrogen bond. In the crystal, inversion dimers linked by pairs of O-H⋯O hydrogen bonds occur. A weak C-H⋯π inter-action is also observed in the crystal.
authors.affiliation: College of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096,  People's Republic of China.
authors.forename: Wen-Ni
authors.initials: WN
authors.lastname: Zheng