title: 2-(2-Pyrid-yl)pyridinium (2,2'-bipyridine-κN,N')tetra-kis-(nitrato-κO,O')bis-muthate(III).
abstract: The structure of the title compound, (C(10)H(9)N(2))[Bi(NO(3))(4)(C(10)H(8)N(2))], consists of 2-(2-pyrid-yl)pyridinium cations and anions [Bi(NO(3))(4)(C(10)H(8)N(2))](-). The Bi(3+) ion lies on the twofold axis. It is coordinated by two nitro-gen atoms from one 2,2'-bipyridine ligand and eight oxygen atoms from four NO(3) (-) anions. The disordered cation is positioned at the inversion centre. The [Bi(NO(3))(4)(C(10)H(8)N(2))](-) anions and 2-(2-pyrid-yl)pyridinium cations are connected via N-H⋯O hydrogen bonds into chains. Moreover, these chains are further linked into a two-dimensional layered structure through π-π stacking inter-actions between bipyridine ligands along the c axis [centroid-centroid distance = 2.868 (4) Å].
authors: College of Chemistry and Pharmacy Engineering, Nanyang Normal University, Nanyang 473061,  People's Republic of China.
authors: Zhao-Hui
authors: ZH
authors: Meng
authors: Shu-Shen
authors: SS
authors: Zhang