Prussian blue molecule-based magnets can be designed to exhibit various magnetic properties. One of them based on chromicyanide and vanadium is a magnet at room temperature. Its properties are very sensitive to the synthetic reaction conditions, solvent effects and counterions which can be used to tune the T-c. To study the interaction between nearest metallic neighbours we explore also the influence of diffuse and high energy magnetic orbitals. Le. 4d or 5d metallic orbitals. Two derivatives of [W-V(CN)(8)](3-) are presented.