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The title coordination polymer, poly­[[tetrakis( N, N′-di­methyl­form­amide)­pentacopper(I,II)]-tetra-μ2-cyano-di-μ3-cyano], [Cu5(CN)6(C3H7NO)4] n, whose structure [Peng & Liaw (1986). Inorg. Chim. Acta, 113, L11–L12] has been redetermined using CCD data, contains four crystallographically independent copper centres, including three CuI ions with tetrahedral or linear geometries and one CuII ion in an octahedral environment. These copper centres are connected by bidentate and tridentate cyanide bridges to form a unique self-penetrating network with 446108 topology, which has been analyzed in detail. Three of the Cu atoms have site symmetries of , 2 and 2. [ABSTRACT FROM AUTHOR]

In the centrosymmetric dinuclear title complex, [Cu2(CH3O)2(C4H8N3O2)2], the two CuII ions are linked by a pair of methoxide bridges, with a non-bonding Cu⋯Cu distance of 3.048 (1) Å. Each CuII center adopts a CuO2N2 square-planar geometry, coordinated by the bidentate bis­(methoxy­carbimido)aminate and two methoxide ligands. [ABSTRACT FROM AUTHOR]