catena-Poly[[[bis-(nitrato-κO)copper(II)]-bis-[µ-1,3-bis-(imidazol-1-yl)-5-methyl-benzene-κ(2)N(3):N(3')]] dihydrate].

In the title complex, {[Cu(NO(3))(2)(C(13)H(12)N(4))(2)]·2H(2)O}(n), the Cu(II) atom is located on a crystallographic center of symmetry and adopts an N(4)O(2) octa-hedral coordination geometry with four imidazole N atoms in the equatorial sites and two O atoms in the axial sites. The dihedral angles between the central benzene ring and the imidazole rings are 4.93 (11) and 46.08 (12)°. The 1,3-bis-(imidazol-1-yl)-5-methyl-benzene ligand is bis-monodentate, linking symmetry-related Cu(II) atoms into sheets in the bc plane. These sheets are further bridged into a three-dimensional supra-molecular structure by O-H⋯O and C-H⋯O hydrogen bonds.