3-(Amino­carbon­yl)pyridinium diaqua-bis­(pyridine-2,6-dicarboxyl­ato)bis­muthate(III) monohydrate

The asymmetric unit of the ionic title compound, (C(6)H(7)N(2)O)[Bi(C(7)H(3)NO(4))(2)(H(2)O)(2)]·H(2)O or (acpyH)[Bi(pydc)(2)(H(2)O)(2)]·H(2)O, contains an [Bi(pydc)(2)(H(2)O)(2)](−) anion (where pydcH(2) is pyridine-2,6-dicarb­oxy­lic acid), a protonated 3-(amino­carbon­yl)pyridine as counter-ion, (acpyH)(+), and one uncoordinated water mol­ecule. The anion is an eight-coordinate complex with a square-anti­prismatic geometry around the Bi(III) atom. In the crystal, extensive O—H⋯O and N—H⋯O hydrogen bonds, as well as ion pairing, C=O⋯π inter­actions [O⋯centroid distance = 3.583 (5) Å], π–π stacking [centroid–centroid distance = 3.864 (3) Å], and C—H⋯π and C—H⋯O inter­actions, play an important role in the formation and stabilization of the three-dimensional supra­molecular structure.