Designed construction of mixed-metal, mixed chalcogenide clusters

Room temperature reactions between Fe-2(CO)(6)(mu -EE'), (E and E' = S, Se or Te) and M(CO)(5)(thf), M = Cr, Mo or W yield three types of clusters, the formation of each type clearly dependent on the nature of E and E' present in Fe-2(CO)(6)(mu -EE') and on the nature of M in M(CO)(5)(thf). While the Mo and W adducts are based on square pyramidal heavy atom cores, the Cr adduct has an unusual structure and can be considered as an inorganic analog of quadricyclane