Catalytic ethylene oligomerization on cobalt(II) bis(imino)pyridine complexes bearing electron-withdrawing groups
作者:Artem A. Antonov、Nina V. Semikolenova、Evgenii P. Talsi、Konstantin P. Bryliakov
DOI:10.1016/j.jorganchem.2019.02.002
日期:2019.3
A series of novel bis(imino)pyridinecobalt(II) chlorides, LCoCl2, with the bis(imino)pyridine ligands bearing one or several electron-withdrawing substituents (F, Cl, Br, CF3) at the aniline moieties, have been prepared and characterized. In the presence of methylalumoxane (MAO), these complexes have demonstrated high ethylene oligo- and polymerization activity (up to 1.8·107 g products∙(mol Co)−1 h−1 bar−1)
一系列新颖的双(亚氨基)吡啶钴(II)氯化物LCoCl 2具有在苯胺部分带有一个或多个吸电子取代基(F,Cl,Br,CF 3)的双(亚氨基)吡啶配体准备和表征。在甲基铝氧烷(MAO)的存在下,这些配合物表现出高的乙烯低聚和聚合活性(高达1.8·10 7 g产品∙(mol Co)-1 h -1 bar -1),提供的产品范围为1-丁烯和Z,E -2-丁烯至严格线性低分子量(M n 〜300…700)聚乙烯。讨论了反应结果对配体结构的依赖性。