catena-Poly[[bis-(1-ethyl-1H-imidazole-κN)copper(II)]-μ-oxalato-κO,O:O,O].

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 octa-hedral CuO(4)N(2) donor set. The Cu⋯Cu separation through the oxalate bridge is 5.620†(5)†à . Both the Cu atoms and the C-C bond of the oxalate bridge are bis-ected by inversion centres.