Synthesis of Ring-substituted Bis-eta5-cyclopentadienyl Derivatives of the Group IV Elements Containing the Bicyclic Ligands eta5-C5H3(1,2-CH2-)n, n= 4, 5, or 6

The synthesis of unsubstituted and substituted bicyclic eta(5)-cyclopentadienyl ligands and their Group IV metal complexes [M{eta(5)-C5H3(1,2-CH2-)(n)}(2)Cl-2], where n = 4, 5, 6 and M = Ti, Zr, Hf, is reported. An example of an ansa-bridged zirconium analogue is also described