Tridentate P^N^P Chromium Complexes: Synthesis, Character-ization and Their Ethylene Oligomerization and Polymerization

doi:10.6023/cjoc201302022

Chin. J. Org. Chem. ›› 2013, Vol. 33 ›› Issue (04): 808-814.DOI: 10.6023/cjoc201302022 Previous Articles Next Articles

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P^N^P三齿铬配合物合成和结构及其催化乙烯齐聚与聚合

刘清云^a,b, 高榕^b, 侯俊先^b, 孙文华^b

a 长江大学化学与环境工程学院荆州 434023;
b 中国科学院化学研究所工程塑料重点实验室北京 100190

收稿日期:2013-02-28 修回日期:2013-03-22 发布日期:2013-03-28
通讯作者: 孙文华 E-mail:whsun@iccas.ac.cn
基金资助:
国家自然科学基金(No. 51273202)资助项目.

Tridentate P^N^P Chromium Complexes: Synthesis, Character-ization and Their Ethylene Oligomerization and Polymerization

Liu Qingyun^a,b, Gao Rong^b, Hou Junxian^b, Sun Wenhua^b

a College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023;
b Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190

Received:2013-02-28 Revised:2013-03-22 Published:2013-03-28
Supported by:
Project supported by the National Natural Science Foundation of China (No. 51273202).

A series of chromium(III) complexes ligated by the 2-(diphenylphosphino)-N-[2-(diarylphosphino)benzyl- idene]anilines (P^N^P) and 2-(diphenylphosphino)-N-[2-(diarylphosphino)benzyl]benzenamine (P^N^P) were synthesized and characterized by elemental and spectroscopic analyses as well as the X-ray single-crystal crystallography, revealing both chromium complexes 1a and 2a as the six-coordinated distorted octahedral geometry. Upon activation with MAO or AlEtCl₂, these chromium complexes performed good catalytic activities for ethylene oligomerization and polymerization. Unique properties were observed for two typical chromium complexes due to the different coordinated nitrogen from imino and secondary amino group in the ligands. The chromium complexes 1a～1e bearing 2-(diphenylphosphino)-N-[2-(diarylphosphino)benzyli- dene]anilines preceded ethylene polymerization without observing any oligomers, meanwhile chromium complexes 2a～2e coordinated with 2-(diphenylphosphino)-N-[2-(diarylphosphino)benzyl]benzenamines performed major ethylene trimerization with excellent selectivity towards α-olefins.

Key words: chromium complex, ethylene oligomerization, ethylene polymerization

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Liu Qingyun, Gao Rong, Hou Junxian, Sun Wenhua. Tridentate P^N^P Chromium Complexes: Synthesis, Character-ization and Their Ethylene Oligomerization and Polymerization[J]. Chin. J. Org. Chem., 2013, 33(04): 808-814.

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P^N^P三齿铬配合物合成和结构及其催化乙烯齐聚与聚合

Tridentate P^N^P Chromium Complexes: Synthesis, Character-ization and Their Ethylene Oligomerization and Polymerization

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