Nitro-functionalized bis(imino)pyridylferrous chlorides as thermo-stable precatalysts for linear polyethylenes with high molecular weights
作者:Qaiser Mahmood、Erlin Yue、Jingjing Guo、Wenjuan Zhang、Yanping Ma、Xiang Hao、Wen-Hua Sun
DOI:10.1016/j.polymer.2018.11.016
日期:2018.12
Electronically and sterically enhanced Fe (II) chloride complexes (Fe1 Fe6) bearing 2-(1-(2,6-dibenzhydryl-4-nitrophenylimino)ethyl)-6-(1-(arylimino)ethyl)pyridine (aryl = 2,6-Me2Ph L1, 2,6-Et2Ph L2, 2,6-iPr2Ph L3, 2,4,6-Me3Ph L4 and 2,6-Et2-4-MePh L5) and 2,6-bis(1-(2,6-dibenzhydryl-4-nitrophenylimino)ethyl)pyridine (L6) ligands have been prepared. In addition to the elemental and spectroscopic analysis
电子和空间增强的Fe(II)氯化物复合物(FE1 FE6)轴承2-(1-(2,6-二dibenzhydryl -4- nitrophenylimino)乙基)-6-(1-(芳基亚氨基)乙基)吡啶(芳基= 2, 6-ME 2博士L1,2,6-的Et 2博士L2,2,6-我镨2博士L3,2,4,6--ME 3博士L4和2,6-的Et 2 -4-麦菲L5)和已经制备了2,6-双(1-(2,6-二苯甲酰基-4-硝基苯基亚氨基)乙基)吡啶(L6)配体。除了对所有新化合物进行元素和光谱分析外,的分子结构FE1,FE2和FE6一直是X射线衍射的主题。研究了所有配合物对乙烯聚合的催化潜力,并与原型预催化剂2,6-双(1-(2,6-二异丙基苯基亚氨基)乙基)吡啶基氯化铁(Fe0)的结果进行了比较。在使用MAO和MMAO助催化剂处理后,Fe6基本没有活性,而铁络合物(Fe1 Fe5) 在50°C时表现出异常高的活性,高达2