Poly[μ(4)-succinato-μ(2)-succinato-bis[diamminecopper(II)]].

In the title compound, Cu(C(4)H(4)O(4))(NH(3))(2), the Cu atom is coordinated by the N atoms of two ammonia mol-ecules and four O atoms from three different succinate ligands in a highly distorted octa-hedral geometry. The Cu atom and the C and O atoms of the succinate ligands lie on a mirror plane. Two adjacent CuO(4)N(2) octa-hedra share one common O-O edge, forming a Cu(2)O(6)N(4) biocta-hedron with a Cu⋯Cu separation of 3.524 (2) Å. Neighboring biocta-hedra are connected by bis-unidentate succinate anions in the a-axis direction, while in the c-axis direction biocta-hedra are connected by bis-bidentate succinate anions, leading to an infinite two-dimensional network structure. These networks are further connected along the a-axis direction by hydrogen bonds between ammonia ligands and carboxyl-ate O atoms of neighboring network layers, forming a three-dimensional lamellar structure.