title: 4,4'-Bipyridinium 1,4-phenyl-ene-diacetate.
abstract: The title compound, C(10)H(10)N(2) (2+)·C(10)H(8)O(4) (2-), has inversion centres located at the geometric centres of the 1,4-phenyl-enediacetate anion and 4,4'-bipyridinium cation. The anions and cations are connected by N-H⋯O hydrogen bonds, forming one-dimensional supra-molecular chains, which inter-act with each other via π-π inter-actions [centroid-centroid distance = 3.938 (2) Å], building a two-dimensional supra-molecular sheet.
authors.affiliation: College of Chemistry and Chemical Engineering, Guangxi Normal University, Yucai Road 15, Guilin 541004, People's Republic of China.
authors.forename: Maomao
authors.initials: M
authors.lastname: Jia
authors.forename: Xianlin
authors.initials: X
authors.lastname: Liu
authors.forename: Jing
authors.initials: J
authors.lastname: Miao
authors.forename: Wei
authors.initials: W
authors.lastname: Xiong
authors.forename: Zilu
authors.initials: Z
authors.lastname: Chen