Tetrakis(dihydrogen pefloxacinium) di-μ2-chlorido-bis[tetrachloridobismuthate(III)] tetrachloride octahydrate
2008
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-μ2-chlorido-bis[tetrachloridobismuthate(III)] tetrachloride octahydrate}, (C17H22FN3O3)4[Bi2Cl10]Cl4·8H2O, is composed of edge-shared centrosymmetric dinuclear [Bi2Cl10]4− anions, Cl− anions, dihydrogen pefloxacinium cations and water molecules. The BiIII coordination polyhedron is a distorted octahedron. There are four short terminal Bi—Cl bonds [2.5037 (10)–2.6911 (7) A] and two longer bridging bonds [2.8834 (8) and 3.0687 (9) A] 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) A].
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