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• W2067756473 abstract "This paper describes abstraction of a benzyl group from the Zr dibenzyl complex 1,1‘-Fc(NSiMe3)2]ZrBn2 (1) using B(C6F5)3 and [Ph3C][B(C6F5)4] (TB). In both cases, clean formation of the corresponding cationic monobenzyl species LZrBn+ (L = 1,1‘-Fc(NSiMe3)22-) was observed by NMR spectroscopy. In the case of [LZrBn][BnB(C6F5)3] (2), an X-ray crystal structure determination confirmed an η6 coordination of the borate benzyl group to the cationic Zr center. Reaction of this complex with 1 equiv of C2H2 or RCCR (R = Me, Ph) proceeded with rapid single insertion of the olefin or acetylene into the Zr−carbon σ-bond. With ethylene or 2-butyne further insertions occur more slowly and longer chains were obtained upon addition of more monomer. Activation of 1 with TB leads to an active ethylene polymerization catalyst, producing 102 g of PE mmol-1 atm-1 h-1. Compound 2 reacted with CH2Cl2 to form the dimeric [LZrCl2]2, which was characterized crystallographically." @default.
• W2067756473 created "2016-06-24" @default.
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• W2067756473 date "2003-01-09" @default.
• W2067756473 modified "2023-10-12" @default.
• W2067756473 title "Ferrocene-Based Olefin Polymerization Catalysts: Activation, Structure, and Intermediates" @default.
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• W2067756473 doi "https://doi.org/10.1021/om020780f" @default.
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