Cyano-bridged cluster-metal coordination compound: synthesis and crystal structure of [Cu(NH3)3][Cu(NH3)4][Cu(NH3)5][W4Te4(CN)12]·5H2O

Dark-brown single crystals of the title compound 1 were obtained in high yield by layering a CuCl2 solution in 25% aqueous ammonia on a glycerol solution of K6[W4Te4(CN)12]·5H2O. The complex 1 was characterized by single crystal X-ray diffraction analysis and IR spectroscopy. The X-ray structure of 1 reveals a polymeric chain cyano-bridged cluster-metal coordination compound. The [W4Te4(CN)12]6− cluster anions are linked one to another by Cu2+ cations through coordination by nitrogen atoms of the CN groups.