文献类型：期刊文献

英文题名：2-(2-Pyridyl or quinolyl)-6-iminopyridyl iron complexes as catalysts for ethylene oligomerization

作者：Sun, Aoao[1,2];Zhou, Tao[1,2];Zhao, Xing[1,2];Zhao, Mei-Xin[1,2];Zhang, Jun[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, 130 Mei Long Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Inst Fine Chem, Sch Chem & Mol Engn, 130 Mei Long Rd, Shanghai 200237, Peoples R China

年份：2026

卷号：1057

外文期刊名：JOURNAL OF ORGANOMETALLIC CHEMISTRY

收录：;EI(收录号：20262420878160);WOS:【SCI-EXPANDED(收录号:WOS:001786851100001)】；

基金：Financial support from the Fundamental Research Funds for the Central Universities (222201717003) , and the National Natural Science Foundation of China (22071055) is greatly acknowledged.

语种：英文

外文关键词：2-(2-Pyridyl)-6-iminopyridine; 2-(2-Quinolyl)-6-iminopyridine; Iron complexes; Ethylene oligomerization; Catalysis

摘要：A series of 2-(2-pyridyl or quinolyl)-6-imino-pyridine ligands and their iron (II) complexes have been synthesized and applied to ethylene oligomerization. By tuning the steric properties of the ligands, 2-(2-pyridyl)-6-iminopyridyl iron complexes bearing two small ortho-substituents on the imino N-aryl groups exhibited high catalytic activity with a higher K value of 0.57 similar to 0.66 for the full range process of ethylene oligomerization upon activation with modified methylaluminoxane (MMAO-3A), and produced a very low waxy solid content (< 0.07 wt%); whereas 2-(2-pyridyl)-6-iminopyridyl iron complex bearing mono ortho-substituent on the imino N-aryl group and 2-(2-quinolyl)-6-iminopyridyl iron complexes produced C-4 as the major product as well as C-6 oligomers. The catalytic performance can be further optimized by changing the reaction conditions, for example, 2-(2-pyridyl)-6-[1-(2,6-dimethylphenylimino)ethyl]pyridine iron complex can reach a high activity of 4.01 & times; 10(7) g mol(-1)(Fe) h(-1), a higher K value of 0.57, 97% of alpha-olefin selectivity under certain conditions, while only produced about <0.05 wt% of low-molecular-weight waxy solids.