Cyanide-Bridged Single-Molecule Magnet Constructed by an Octacoordinated [W(CN)₆(bpy)]^- Anion

Two cyanide-bridged W^V−M [M = Mn^III (<b>1</b>), Co^II (<b>2</b>)] bimetallic clusters were prepared by self-assembling a new molecular precursor [W(CN)₆(bpy)]^- and the corresponding metal complexes. Compound <b>1</b> shows a tetranuclear W₂Mn₂ entity, consisting of a Jahn−Teller ion, Mn^III, which serves as an anisotropic source, while compound <b>2</b> exhibits a trimeric W₂Co structure. Among them, compound <b>1</b> displays slow relaxation of the magnetization, which is typical of a single-molecule magnet behavior.