A series of novel 2,6-bis(imino)pyridyl iron catalysts: synthesis, characterization and ethylene oligomerization
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发布时间：2025-04-30
发布时间：2025-04-30
论文名称：A series of novel 2,6-bis(imino)pyridyl iron catalysts: synthesis, characterization and ethylene oligomerization
发表刊物：Journal of Molecular Catalysis A: Chemical
摘要：A series of novel 2.6-bis(imino)pyridyl iron complexes {2,6-(2-X-4-Y-5-ZC(6)H(2)N=CCH3)(2)C5H3N}FeCl2 (X=Cl, Y=CH3, Z=H (2); X=Br.Y=CH3, Z=H(3);X=F,Y=H,Z=CH3 (4);X=Cl, Y=H,Z=CH3 (5); X=Cl, Y=F (7)) have been synthesized and characterized with elemental analysis and IR. These iron coordinative complexes, activated with methylaluminoxane (MAO), lead to highly active ethylene oligomerization (> 10(7) g/mol Fe h) and the products are mostly linear alpha-olefins (> 90%). The catalytic activities and product properties depend on the substituents on aryl rings and the reaction conditions. As reaction temperature increases, the catalytic activities decrease rapidly and more low-molar-mass products are produced. The product distributions are almost independent of the Al/Fe molar ratio, but the catalytic activities change in different trends when the ortho-substituents on the aryl rings are different. The other three complexes have also been synthesized for comparison to investigate the steric hindrance and electronic effect on the properties of complexes. The complex with adaptable steric hindrance and electronic properties exhibits the highest catalytic activities.
合写作者：Zhicheng Zhang; Shangtao Chen; Youliang Hu
卷号：Volume: 230 Issue: 1-2
页面范围：1-8
是否译文：否
发表时间：2005-04-06