Poly[μ4-succinato-μ2-succinato-bis[diamminecopper(II)]]

Abstract

In the title compound, [Cu(C4H4O4)(NH3)2]n, the Cu atom is coordinated by the N atoms of two ammonia molecules and four O atoms from three different succinate ligands in a highly distorted octahedral geometry. The Cu atom and the C and O atoms of the succinate ligands lie on a mirror plane. Two adjacent CuO4N2 octahedra share one common O–O edge, forming a Cu2O6N4 bioctahedron with a Cu...Cu separation of 3.524 (2) Å. Neighboring bioctahedra are connected by bis-unidentate succinate anions in the a-axis direction, while in the c-axis direction bioctahedra 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 carboxylate O atoms of neighboring network layers, forming a three-dimensional lamellar structure.