Synthesis of Telechelic Olefin Polymers via Catalyzed Chain Growth on Multinuclear Alkylene Zinc Compounds

Multinuclear alkylene zinc (MAZ) compounds of the type EtZn-(R″-Zn) n -Et (R″ = ethyl and propyl branched alkylene groups) were synthesized by a simple one-step procedure in nonpolar hydrocarbon solvents from α,ω-dienes (e.g., 1,7-octadiene or 1,9-decadiene) and diethylzinc using a bis(salicylaldimi...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2013-06, Vol.135 (22), p.8177-8180
Main Authors: Makio, Haruyuki, Ochiai, Takashi, Mohri, Jun-ichi, Takeda, Kouji, Shimazaki, Toshiyuki, Usui, Yoko, Matsuura, Sadahiko, Fujita, Terunori
Format: Article
Language:English
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Summary:Multinuclear alkylene zinc (MAZ) compounds of the type EtZn-(R″-Zn) n -Et (R″ = ethyl and propyl branched alkylene groups) were synthesized by a simple one-step procedure in nonpolar hydrocarbon solvents from α,ω-dienes (e.g., 1,7-octadiene or 1,9-decadiene) and diethylzinc using a bis(salicylaldiminato)Zr(IV) complex, [(2-methylcyclohexyl)NCH(2-O-C6H3-3,5-di-tert-butyl)]2ZrMe2, as a catalyst. The MAZ serves as a divalent reversible chain-transfer agent for olefin polymerization, resulting in telechelic Zn-metalated polyolefins whose molecular weights are controllable over a wide range. The Zn-terminated telechelics serve as a polymer precursor for further reactions and can be converted into a variety of telechelic functionalized polyolefins in high yield.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja403626g