title: 4,4'-Bipyridine-2,3,4,5,6-penta-fluoro-benzoic acid (1/2).
abstract: In the title 1:2 adduct, C(10)H(8)N(2)·2C(7)HF(5)O(2), the complete 4,4'-bipyridine mol-ecule is generated by a crystallographic twofold axis. The components of the adduct are linked by inter-molecular O-H⋯N hydrogen bonds and further connected by a combination of C-H⋯O, C-H⋯F and F⋯F [2.859 (2) Å] inter-actions.
authors.affiliation: College of Chemistry, Liaoning University, Shenyang 110036, People's Republic of China.
authors.forename: Xiangdong
authors.initials: X
authors.lastname: Zhang
authors.forename: Lijuan
authors.initials: L
authors.lastname: Wang
authors.forename: Chunhua
authors.initials: C
authors.lastname: Ge
authors.forename: Yanmei
authors.initials: Y
authors.lastname: Men
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang