Chromium Ethylene Tri-/Tetramerization Catalysts Supported by Iminophosphine Ligands

被引：2

作者：

Zhao, Xing ^{[1
,2
]}

Wang, Jihe ^{[1
,2
]}

Liu, Dongchang ^{[1
,2
]}

Kong, Weihuan ^{[1
,2
]}

Zhang, Jun ^{[1
,2
]}

机构：

[1] East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China

[2] East China Univ Sci & Technol, Inst Fine Chem, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

来源：

ACS OMEGA | 2023年 / 8卷 / 38期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

SELECTIVE TRIMERIZATION; OLIGOMERIZATION; COMPLEXES; TETRAMERIZATION; POLYMERIZATION; PNP; MECHANISM; 1-OCTENE; OLEFIN; TRIMERIZATION/TETRAMERIZATION;

D O I：

10.1021/acsomega.3c03356

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new class of highly active ethylene tri-/tetramerization chromium catalysts supported by iminophosphine ligands has been studied. The impact of electronic and steric changes of these ligands on selectivity and activity has been investigated by varying P- and/or N-substituents. Upon activation with MMAO, the ligand bearing a P-cyclohexyl group displayed a high activity of 307 kg/(g Cr/h) with a high trimerization selectivity of 92.6%. Decreasing the steric hindrance of N-aryl group led to a decrease in 1-hexene selectivity (74.5%), producing more 1-octene (10.3%). X-ray diffraction analysis verifies that the ligands coordinate with the chromium center in a ?(2)-P,N mode.

引用

页码：34549 / 34556

页数：8

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