| 摘要 |
A process for making a metallocene, said process comprising the steps of (a) reacting an alkylsubstituted cyclopentadiene ligand, which contains a mixture of endoand exo-isomers, with up to about a 10% excess over a stoichiometric amount of a deprotonation agent based on the amount of endo-isomers, so as to form a salt of said endoisomers, (b) reacting the endo-isomer salt with a transition or actinide metal compound so as to form said metallocene and (c) optionally separating said exo-isomers and trace amounts of unreacted endo-isomers from said metallocene by distillation.
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