3,3′′-Bis(9-hy­droxy­fluoren-9-yl)-1,1′:3′,1′′-terphen­yl

The asymmetric unit of the title compound, C₄₄H₃₀O₂, contains two independent mol­ecules in which the terminal rings of the terphenyl element are inclined at angles of 36.3 (1) and 22.5 (1)° with respect to the central ring and the dihedral angles between the fluorenyl units are 72.3 (1) and 62.8 (1)°. In the crystal, pairs of O—H...O hydrogen bonds link the mol­ecules into inversion dimers. The hy­droxy H atoms not involved in these hydrogen bonds form O—H...π inter­actions in which the central terphenyl rings act as acceptors. Weak C—H...O contacts and π–π [centroid–centroid distance = 4.088 (2) Å] stacking inter­actions also occur. Taking into account directed non-covalent bonding between the molecules, the crystal is constructed of supramolecular strands extending along the a-axis direction.