Tetra­kis(dihydrogen pefloxacinium) di-μ(2)-chlorido-bis­[tetra­chloridobismuthate(III)] tetra­chloride octa­hydrate

The title compound {systematic name: tetra­kis[4-(3-carb­oxy-1-ethyl-6-fluoro-4-hydroxonio-1,4-dihydro-7-quinol­yl)-1-meth­yl­piperazin-1-ium] di-μ(2)-chlorido-bis­[tetra­chlorido­bismuth­ate(III)] tetra­chloride octa­hydrate}, (C(17)H(22)FN(3)O(3))(4)[Bi(2)Cl(10)]Cl(4)·8H(2)O, is composed of edge-shared centrosymmetric dinuclear [Bi(2)Cl(10)](4−) anions, Cl(−) anions, dihydrogen pefloxacinium cations and water mol­ecules. The Bi(III) coordination polyhedron is a distorted octa­hedron. There are four short terminal Bi—Cl bonds [2.5037 (10)–2.6911 (7) Å] and two longer bridging bonds [2.8834 (8) and 3.0687 (9) Å] in each octa­hedron. Two sets of chloride ions and water mol­ecules are disordered over the same sites with site occupancies of 1/3 and 2/3, respectively. Anions, cations and water mol­ecules are linked by O—H⋯O, O—H⋯Cl and N—H⋯Cl hydrogen bonds, forming a three-dimensional framework. There are also π–π stacking inter­actions between quinoline ring systems [centroid–centroid distance = 3.575 (1) Å].