catena-Poly[[(diaqua­calcium)-bis­(μ-2-fluorobenzoato)-1′:1κ(3) O:O,O′;1:1′′κ(3) O,O′:O] 2,2′-bipyridine hemi­solvate]

In the title compound, {[Ca(C(7)H(4)FO(2))(2)(H(2)O)(2)]·0.5C(10)H(8)N(2)}(n), the Ca(II) atom is coordinated by eigth O atoms from four 2-fluoro­benzoate ligands and two water mol­ecules, resulting in a distorted CaO(8) square-anti­prismatic coordination environment. The 2-fluoro­benzoate ligand bridges two symmetry-related Ca(II) atoms, giving rise to a chain structure extending along [100]. The distances between the Ca atom and its two symmetry-related counterparts are 4.054 (2) and 4.106 (2) Å. The polymeric chains are connected by classical O—H⋯N hydrogen bonds into a layer structure parallel to (010). The layers are connected by non-classical C—H⋯F hydrogen bonds into a three-dimensional supra­molecular structure. O—H⋯O and C—H⋯O inter­actions also occur. The uncoordinated 2,2′-bipyridine mol­ecule is located on a centre of symmetry at the mid-point of the bond between the two heterocycles. One of the two benzene rings is disordered over two sites with occupancy factors of 0.60 and 0.40.