Copolymerization of Hepta-1,6-diene with Ethylene Catalyzed by Cobalt Complexes
Copolymerization of Hepta-1,6-diene with Ethylene Catalyzed by Cobalt Complexes
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DOI：
10.1002/marc.200800424
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发表时间：
2008-12
影响因子：
4.6
通讯作者：
Daisuke Takeuchi;R. Matsuura;K. Osakada
中科院分区：
文献类型：
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作者：
Daisuke Takeuchi;R. Matsuura;K. Osakada
七-1，6-二烯与乙烯在钴-双(亚氨基)吡啶配合物的作用下进行共聚，得到了一种在七-1，6-二烯的重复单元中含有反式-1，2-五元环的聚合物。根据反应条件，双烯和乙烯的重复单元的比例控制在3：97到50：50之间。同位素标记反应表明，主链转移途径涉及乙烯插入后形成的聚合物末端的β-氢消除。
Copolymerization of hepta-1,6-diene with ethylene using a cobalt-bis(imino)pyridine complex affords a polymer that contains trans-1,2-five-membered rings in the repeating unit from hepta-1,6-diene. The ratio of the repeating units of diene to those of ethylene is controlled from 3: 97 to 50:50, depending on the reaction conditions. Isotope-labeling reactions reveal that the major chain transfer pathway involves β-hydrogen elimination of the polymer end formed after ethylene insertion.