catena-Poly[[bis­(1-ethyl-1H-imidazole-κN (3))copper(II)]-μ-oxalato-κ(4) O (1),O (2):O (1′),O (2′)]

The title compound, [Cu(C(2)O(4))(C(5)H(8)N(2))(2)](n), is composed of one-dimensional linear chains running parallel to the a axis. In the chain, trans-[Cu(imidazole)(2)](2+) units are sequentially bridged by bis-bidentate oxalate ligands, resulting in an octa­hedral CuO(4)N(2) donor set. The Cu⋯Cu separation through the oxalate bridge is 5.620 (5) Å. Both the Cu atoms and the C—C bond of the oxalate bridge are bis­ected by inversion centres.