A Monomeric Tricobalt(II)-Substituted Dawson-Type Polyoxometalate Decorated by a Metal Carbonyl Group: [PWOCo(HO)(OH)Mn(CO)].

A monomeric tricobalt(II)-substituted phosphotungstate polyanion, [HPWOCo], is stabilized by the attachement of an organometallic group, {Mn(CO)}, for the first time. The resulting polyoxometalate-supported [Mn(CO)] complex (1) can be used as an efficient catalyst in the cycloaddition of CO with epoxides under mild reaction conditions with pyrrolidinium bromide as a cocatalyst. Besides, magnetic measurements show that the compound exhibits weaker ferromagnetic interactions at low temperature.