title: 4,5-Diazafluoren-9-ol.
abstract: The title compound, C(11)H(8)N(2)O, has two crystallographically independent molecules in the crystal. Each molecule is basically planar except for the O atom. The two N atoms in the molecule show different behaviour as hydrogen-bonding acceptors. One of them is involved in intermolecular O-H.N hydrogen bonds which stabilize the crystal packing.
authors.affiliation: Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China.
authors.forename: C
authors.initials: C
authors.lastname: Tu
authors.forename: D R
authors.initials: DR
authors.lastname: Zhu
authors.forename: Y
authors.initials: Y
authors.lastname: Xu
authors.forename: X K
authors.initials: XK
authors.lastname: Ke
authors.forename: Z
authors.initials: Z
authors.lastname: Guo