Poly[[bis-(acetonitrile-κN)bis-[μ(2)-2,2'-(methyl-enedithio)bis-(1,3,4-thia-diazole)-κN:N]copper(II)] bis-(perchlorate) acetonitrile solvate].

In the title compound, {Cu(C(5)H(4)N(4)S(4))(2)(C(2)H(3)N)(2)(2)·C(2)H(3)N}(n), the Cu(II) atom occupies a crystallographic inversion centre and is six-coordinated by six N atoms of four symmetry-related 2,2'-(methyl-enedithio)bis-(1,3,4-thia-diazole) (L) ligands and two acetonitrile mol-ecules in a slightly distorted octa-hedral geometry. The ligand L adopts an N:N'-bidentate bridging mode in a trans configuration, bridging the Cu atoms via translation symmetry, forming a two-dimensional layer-like structure. The perchlorate ions serve as acceptors for inter-molecular C-H⋯O hydrogen bonds, which link the layers into a three-dimensional network. The ClO(4) (-) anion is disordered with an occupation ratio of 0.658:0.342.