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Cis-1,4-specific polymerization of 1,3-conjugated dienes with bis(benzimidazole)NiCl2 catalyst system
Polymer ( IF 4.1 ) Pub Date : 2024-11-09 , DOI: 10.1016/j.polymer.2024.127806
Yasuyuki Ueda, Kakeru Tsukahara, Masahito Hasumi, Kohei Uyama, Hiroshi Yukawa, Takehito Kato, Tomoyuki Toda, Shun Ohta, Kei Nishii

We report herein that the catalytic system composed of a bis(benzimidazole)NiCl2 complex (1, bis(benzimidazole) = phenylbis(benzimidazol-2-yl)methane), Al(C8H17)3 (AlOct3), and [Ph3C][B(C6F5)4] mediates highly cis-1,4-specific (up to 95 %) polymerization of isoprene (IP). This is the first nickel complex-based catalyst system that achieved the cis-1,4-specific IP polymerization with a selectivity of more than 90 %. The effects of AlR3 (R = iBu, Et, Me), AlEt2Cl and activator ([PhNMe2H][B(C6F5)4], B(C6F5)3, MAO) on the polymerization behavior were also investigated. The 1/AlOct3/[Ph3C][B(C6F5)4] system also catalyzed the cis-1,4-specific polymerization of other 1,3-conjugated dienes such as 1,3-butadiene (BD), (E)-1,3-pentadiene (EPD) and β-myrcene (MY) (up to 92 % for BD, 84 % for EPD and 72 % for MY).

中文翻译:


1,3-共轭二烯与双(苯并咪唑)NiCl2 催化剂体系的顺式-1,4-特异性聚合反应



我们在此报道,由双(苯并咪唑)NiCl2 络合物(1,双(苯并咪唑)= 苯基双(苯并咪唑-2-基)甲烷)、Al(C8H17)3 (AlOct3) 和 [Ph3C][B(C6F5)4] 组成的催化体系介导异戊二烯 (IP) 的高度顺式-1,4 特异性(高达 95%)聚合。这是第一个基于镍络合物的催化剂系统,实现了选择性超过 90% 的顺式 1,4 特异性 IP 聚合。还研究了 AlR3 (R = iBu, Et, Me)、AlEt2Cl 和活化剂 ([PhNMe2H][B(C6F5)4], B(C6F5)3, 毛) 对聚合行为的影响。1/AlOct3/[Ph3C][B(C6F5)4] 系统还催化了其他 1,3-共轭二烯的顺式-1,4 特异性聚合,例如 1,3-丁二烯 (BD)、(E)-1,3-戊二烯 (EPD) 和 β-月桂烯 (MY)(BD 高达 92%,EPD 高达 84%,MY高达 72%)。
更新日期:2024-11-09
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