Synthesis and characterization of a polyoxotungstate-supported metal compound [{Cu(enMe)2(H2O)}{Cu(enMe)2}3P2W18O62] · nH2O

One terminal and three bridging oxygen atoms of the Wells-Dawson cluster are coordinated to copper(II) atoms, and forming a unique tetrasupporting polyoxometalate structure. It was exhibited that the compound has catalytic activity in epoxidation of maleic anhydride.