Bis(2-carboxybenzo-ato-κO)bis-[1-cyclo-propyl-6-fluoro-4-oxo-7-(piperazin-4-ium-1-yl)-1,4-dihydro-quinoline-3-carboxyl-ato-κO,O]manganese(II) dihydrate.

The title compound, [Mn(C(17)H(18)FN(3)O(3))(2)(C(8)H(5)O(4))(2)]·2H(2)O or [Mn(cfH)(2)(1,2-Hbdc)(2)]·2H(2)O (cfH = ciprofloxacin = 1-cyclo-propyl-6-fluoro-1,4-dihydro-4-oxo-7-(1-piperazin-yl)-3-quinoline carb-oxy-lic acid, 1,2-bdc = benzene-1,2-dicarboxyl-ate), has been prepared under hydro-thermal conditions. The Mn(2+) atom, located on an inversion centre, exhibits a distorted octa-hedral geometry, coordinated by four O atoms from two symmetry-related zwitterionic ciprofloxacin ligands in the equatorial positions and two O atoms of two 1,2-Hbdc ligands in the axial positions. The complex mol-ecules are linked into a two-dimensional network through N-H⋯O and OW-H⋯O hydrogen bonds. A strong intramolecular hydrogen bond between the carboxyl/carboxylate groups of the 1,2-Hbdc anion is also present. The layers are further extended through off-set aromatic π-π stacking inter-actions of cfH groups [centroid-centroid distance of 3.657 (2) Å] into the final three-dimensional supra-molecular arrays.