A Unique Cyanide-Bridged Three-Dimensional (3-D) Copper(II)−Copper(I) Mixed-Valence Polymer Containing 1-D Water Tapes with Cyclic Pentamer Units

A unique cyano-bridged copper(II)−copper(I) mixed-valence polymer, {[Cu3(CN)4(H2O)3](H2O)2}n (1), has been prepared and structurally determined by X-ray diffraction. The cyanide anions with (μ2,η2) and (μ3,η2) bridging modes connect the copper centers into a complicated zeolite-like 3-D network. Of further interest, coordinated and lattice water molecules in this structure form 1-D hydrogen-bonded water tapes consisting of linked cyclic pentamer clusters.