[1,5-bis(1-methyl-1H-tetrazol-5-yl-kappaN)-3-oxopentane-kappaO]dichlorocopper(II).

The title compound, [CuCl2(C8H14N8O)], is the first structurally characterized molecular chelate complex of a binuclear N-substituted tetrazole. The Cu atom is five-coordinate, with an approximately square-pyramidal geometry. The equatorial positions of the pyramid are occupied by two Cl atoms and two N atoms from the ligand molecule; the O atom of the ligand lies in the axial position. Each complex is connected to four others via weak C-H...Cl and C-H...N interactions, forming sheets parallel to the (010) plane.