2-(2-Pyrid­yl)pyridinium (2,2′-bipyridine-κ(2) N,N′)tetra­kis­(nitrato-κ(2) O,O′)bis­muthate(III)

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-pyrid­yl)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 nitro­gen 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-pyrid­yl)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 inter­actions between bipyridine ligands along the c axis [centroid–centroid distance = 2.868 (4) Å].