REACTIVITY OF THE 2-ETA-6-ETA-2-C10H8)YB(THF)(MU-2-ETA-5-ETA-5-CP)]N COMPLEX

The interactions of the CpVC10H8Yb(THF)Cp complex with H2O, CO, CO2, C r(CO)6, CpTl, azobenzene, and other reagents are followed by the break ing of the bond between ytterbium and the naphthalene ligand. The reac tion of CpVC10H8Yb(THF)Cp with H2O leads to CpYbOH(THF)2 and CpVC10H8 formation. Ytterbocene, CpVC10H8 and insoluble carboxylates are isolat ed as a result of the interaction of CpVC10H8Yb(THF)Cp with CO and CO2 . The reaction of CpVC10H8Yb(THF)Cp with an equimolar amount of Cr(CO) 6 proceeds not only via the breaking of the C10H8-Yb bond, but is foll owed by the destruction of the CpVC10H8 fragment to form Cp2Yb, Cp2V, CpVC10H8, CpVC10H8VCP, and C10H8. Under mild conditions, the reaction of CpVC10H8Yb(THF)Cp with CpTl occurs leading to the formation Of CP2Y b and CpVC10H8 in high yield. The diphenylhydrazine complex of ytterbi um [CpYb(THF)]2[Ph2N2]2 is isolated in the reaction of CpVC10H8Yb(THF) Cp with azobenzene.