Synthesis and Alcohol Vapor Sensitivity of a Ferromagnetic Copper−Tungsten Bimetallic Assembly

A copper(II) octacyanotungsten(V)-based ferromagnet, Cu^II₃[W^V(CN)₈]₂(pyrimidine)₂·8H₂O, was prepared. This magnetic material can reversibly adsorb and desorb n-propanol vapor and shows reversible variations in the crystal structure and magnetic properties. These changes are due to the coordination geometry switching of Cu^II between 6-coordinate and 5-coordinate.