The present invention provides a method of making compounds comprising
linked cyclopentadienyl and fluorenyl groups, including substituted
analogs thereof, which are precursors to ansa-metallocenes comprising
bridged cyclopentadienyl and fluorenyl ligands. In one aspect, this
invention provides a preparative method for
(5-cyclopentadienyl)[5-(2,7-di-tert-butylfluorenyl)]hex-1-ene, and
ansa-metallocenes comprising this ligand.