Poly[[[μ-1,1′-(butane-1,4-di­yl)diimidazole-κ(2) N (3):N (3′)](μ-cyclo­hexane-1,4-dicarboxyl­ato-κ(4) O (1),O (1′):O (4),O (4′))nickel(II)] 0.25-hydrate]

In the title coordination polymer, {[Ni(C(8)H(10)O(4))(C(10)H(14)N(4))]·0.25H(2)O}(n), the coordination of the Ni(II) ion is distorted octa­hedral. The 1,1′-(butane-1,4-di­yl)diimidazole ligand and the cyclo­hexane-1,4-dicarboxyl­ate dianion bridge metal centres, forming a two-dimensional (4,4) network. The network is consolidated by O—H⋯O hydrogen bonds between the statistically occupied water molecules and O atoms of the two carboxylate groups.