title: 1-Hy-droxy-11H-benzo[b]fluoren-11-one.
abstract: The title compound, C(17)H(10)O(2), is nearly planar, the maximum atomic deviation being 0.053 (2) Å. In the mol-ecule, an intra-molecular O-H⋯O hydrogen bond generates an S(6) ring motif. In the crystal, inversion-related mol-ecules are linked by pairs of weak C-H⋯O hydrogen bonds, forming dimers. π-π stacking is observed in the crystal structure, the closest centroid-centroid distance being 3.7846 (16) Å.
authors.affiliation: Department of Chemical Engineering, Feng Chia University, 40724 Taichung,  Taiwan.
authors.forename: Kew-Yu
authors.initials: KY
authors.lastname: Chen
authors.forename: Ming-Jen
authors.initials: MJ
authors.lastname: Chang
authors.forename: Tzu-Chien
authors.initials: TC
authors.lastname: Fang