Mitsui Chemicals Singapore R&D Centre , 50 Science Park Road, The Kendall, Science Park II, Singapore 117406.
J Am Chem Soc. 2013 Jun 5;135(22):8177-80. doi: 10.1021/ja403626g. Epub 2013 May 20.
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.
多核亚烷基锌（MAZ）化合物，例如 EtZn-(R″-Zn)n-Et（R″=乙基和丙基支化亚烷基基团），可以通过在非极性烃溶剂中使用双（水杨醛亚氨基）Zr（IV）配合物[(2-甲基环己基)N═CH(2-O-C6H3-3,5-二叔丁基)]2ZrMe2，从α,ω-二烯（例如 1,7-辛二烯或 1,9-癸二烯）和二乙基锌一步简单合成。MAZ 用作烯烃聚合的二价可逆链转移剂，导致遥爪 Zn 金属化聚烯烃的分子量可以在很宽的范围内控制。Zn 端基遥爪聚合物是进一步反应的聚合物前体，可以高产率转化为多种遥爪官能化聚烯烃。
