Reactivity of a Biomimetic W(IV) Bis-Dithiolene Complex with CO2 Leading to Formate Production and Structural Rearrangement

A mononuclear W(IV) bis-dithiolene complex stabilized by an oxo ligand shows a reductive reactivity toward CO2, from which formate and a dinuclear W(V) complex are generated. An unusual structural rearrangement was observed during the reaction. Structural and spectroscopic characterization for a novel triply bridged dinuclear W(V) complex is reported.