title: 2,7-Dibromo-9,9-bis-[(pyridin-1-ium-4-yl)meth-yl]fluorene dinitrate.
abstract: In the title compound, C(25)H(20)Br(2)N(2) (2+)·2NO(3) (-), the cation lies on a twofold rotation axis which imposes disorder of the dibromo-fluorene unit. In addition, the unique nitrate anion is disordered over two general sites of equal occupancy. The crystal structure is stabilized by inter-molecular N-H⋯O hydrogen bonds.
authors.forename: Fang-Fang
authors.initials: FF
authors.lastname: Jian
authors.forename: Shan-Shan
authors.initials: SS
authors.lastname: Zhao
authors.forename: Huan-Mei
authors.initials: HM
authors.lastname: Guo
authors.forename: Yu-Feng
authors.initials: YF
authors.lastname: Li
authors.forename: Pu-Su
authors.initials: PS
authors.lastname: Zhao