Crystal structure of catena-polybis­(tetra­ethyl­ammonium) tetra­aqua­tris(μ-dicyanamido-κ2N1:N5)bis(dicyanamido-κN1)di­cobaltate(II) dicyanamide

摘要

The structure of the title compound, [N(C2H5)4]2[Co2(C2N3)5(H2O)4](C2N3), is a new example of a metal–dicyanamide coordination polymer which exhibits a unique three-dimensional framework of covalently linked Co^II chains. All bridging dicyanamide ligands in the title structure are in the μ 1,5-bridging mode. The anionic Co^II-dicyanamide network is templated by tetra­ethyl­ammonium cations residing in a series of channels extending along the b axis where additional non-coordinating dicyanamidate anions are also located. The framework structure is further stabilized by O—H⋯N hydrogen bonding between aqua ligands and dicyanamido ligands or the dicyanamide anion. In addition, C—H⋯N inter­actions are present between the tetra­ethyl­ammonium cations and dicyanamide amide nitro­gen atoms.