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• W2041582427 abstract "Solutions of the Ziegler–Natta system Cp*TiMe 3 – B(C 6 F 5 ) 3 in toluene catalyze the polymerization of 1-hexene to mixtures of atactic poly-1-hexenes and complex oligomeric materials, which were characterized by 1 H and 13 C{ 1 H} NMR spectroscopy and gel permeation chromatography (GPC). The polymer molecular weights and the relative proportions of polymers and oligomers vary with temperature, monomer:catalyst ratios, and degree of dilution and may generally be rationalized in terms of a conventional Ziegler–Natta mechanism. The 13 C{ 1 H} NMR spectra of the polymers exhibit resonances suggesting significant degrees of 2,1-insertions during propagation, while experiments utilizing Cp*Ti( 13 CH 3 ) 3 verify that initiation in toluene involves predominantly via 1,2-insertion of the first monomer unit but that 2,1-insertions occur up to 15–20% of the time in CH 2 Cl 2 . NMR experiments involving Cp*Ti( 13 CH 3 ) 3 demonstrate that both methyl groups in the presumed active species Cp*TiMe + 2 are incorporated into polymerKey words: titanium, polymers, polymerization, Ziegler–Natta" @default.
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• W2041582427 date "2001-05-01" @default.
• W2041582427 modified "2023-10-09" @default.
• W2041582427 title "Polymerization of 1-hexene catalyzed by Cp*TiMe₃-B(C₆F₅)₃; a mechanistic and structural study" @default.
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• W2041582427 doi "https://doi.org/10.1139/v00-183" @default.
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