Living polymerization of alpha-olefins with an alpha-diimine Ni(II) catalyst: formation of well-defined ethylene-propylene copolymers through controlled chain-walking |
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| Authors: | Rose Jeffrey M Cherian Anna E Coates Geoffrey W |
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| Affiliation: | Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, USA. |
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| Abstract: | A C2-symmetric Ni(II) catalyst was found to polymerize alpha-olefins with high levels of omega,2-regiochemistry. The resulting products are ethylene-propylene-type copolymers with methylene sequences of precise length between methyl branches. Modification of reaction conditions can introduce omega,1-enchainments into the polymers which increases the average length of methylene sequences between methyl branches. |
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