catena-poly[[[diaquacopper(II)]-bis[μ-1,1′-(butane-1,4-diyl)diimidazole-κ2N3:N3′]] dinitrate]

In the title compound, {[Cu(C10H14N4)(2)(H2O) 2](NO3)(2)}(n), the Cu-II ion lies on an inversion center and is six-coordinated in an octahedral environment by four N atoms from four different 1,10-butane-1,4-diyldiimidazole ligands and two O atoms from the two water molecules. Bridging by the ligands results in a ribbon structure. Adjacent ribbons are linked to the nitrate anions via O -H center dot center dot center dot O hydrogen bonds, forming layers. One nitrate O atom is disordered equally over two positions.