Bi- and triheteronuclear complexes of uranium and group VI transition metals

Abstract

The new heterobimetallic compounds Cp 3U[OCM(CO) 2Cp′] containing uranium and group VI transition metals are synthesized from Cp 3UCl and Na[M(CO) 3Cp′] or from Cp 3UCH 3 and H[M(CO) 3Cp′] (M = Mo, W; Cp = C 5H 5; Cp′ = C 5H 5 or C 5Me 5). In a same manner, the trimetallic Cp 2U[OCMo(CO) 2Cp] 2 is obtained starting from Cp 2U(NEt 2) 2 and H[Mo(CO) 3Cp]. All these complexes exhibit low CO stretching frequencies characteristic of isocarbonyl linkages between uranium and Mo or W atoms.