catena-Poly[[[tetra­aqua­nickel(II)]-μ-4,4′-bipyridyl-κ(2) N:N′] 3,3′-(p-phenyl­ene)diacrylate]

In the title compound, {[Ni(C(10)H(8)N(2))(H(2)O)(4)](C(12)H(8)O(4))}(n), the Ni(II), 4,4′-bipyridyl (bipy) and 3,3′-(p-phenyl­ene)diacrylate (L (2−)) moieties are situated on inversion centres. The bipy ligands bridge Ni(II) ions into positively charged polymeric chains along [101]. The Ni(II) atom is coordinated by two N atoms from two bipy ligands and four water mol­ecules in a distorted octa­hedral geometry. L (2−) anions inter­act with the polymeric chains via O–H⋯O hydrogen bonds, forming a three-dimensional supra­molecular network.