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rac -Zr(η 5:η 1 -CpCMe 2 CB 10 H 10 C) 2, prepared from the reaction of the dilithium salt of the new isopropyl-bridged cyclopentadienyl o -carboranyl ligand CpHCMe 2 CB 10 H 10 CH with ZrCl 4, catalyzes the formation of syndiotactic poly(methyl methacrylate) in THF in the absence of any alkylating reagent or cationic center generator.
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Hong et al. (1998) studied this question.
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