trans-Tetra­aqua­bis­[1,3-bis­(4-pyrid­yl)propane-κN]cobalt(II) biphenyl-4,4′-disulfonate monohydrate

In the title compound, [Co(C(13)H(14)N(2))(2)(H(2)O)(4)](C(12)H(8)O(6)S(2))·H(2)O, the cation, anion and uncoordinated water mol­ecule have crystallographically imposed twofold symmetry. The cobalt(II) atom exhibits a slightly distorted octa­hedral coordination geometry provided by two N atoms from two 1,3-bis­(4-pyrid­yl)propane ligands and the O atoms from four water mol­ecules. The dihedral angle between the pyridine rings in the ligand is 86.14 (11)°, whereas the dihedral angle formed by the symmetry-related benzene rings in the anion is 35.81 (12)°. In the crystal, cations, anions and water mol­ecules are linked into layers parallel to the ac plane by O—H⋯O and O—H⋯N hydrogen-bond inter­actions. The layers are further connected into a three-dimensional network by C—H⋯O hydrogen bonds.