Octahedral metal clusters as building units in a neutral layered honeycomb network, [Zn(en)](2)[Nb6Cl12(CN)(6)]

A polymeric hybrid cluster-based compound with a double-layered honeycomb framework built of octahedral niobium cyanochloride clusters and {Zn(en)}(2+) metal complexes was designed and synthesized at room temperature, and structurally characterized by single crystal X-ray diffraction.