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J Am Chem Soc. 2013 Jun 5;135(22):8177-80. doi: 10.1021/ja403626g. Epub 2013 May 20.

Synthesis of telechelic olefin polymers via catalyzed chain growth on multinuclear alkylene zinc compounds.

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1
Mitsui Chemicals Singapore R&D Centre , 50 Science Park Road, The Kendall, Science Park II, Singapore 117406.

Abstract

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.

PMID:
23675870
DOI:
10.1021/ja403626g
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