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

doi:10.6023/cjoc201302022

有机化学 ›› 2013, Vol. 33 ›› Issue (04): 808-814.DOI: 10.6023/cjoc201302022 上一篇下一篇

研究论文

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).

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摘要/Abstract

合成了系列的2-(二苯基膦)-N-[2-(二芳基膦)亚苄基]苯胺(P^N^P)和2-(二苯基膦)-N-[2-(二芳基膦)苄基]苯胺(P^N^P)铬(III)配合物, 经过元素分析和光谱分析进行了表征, 并使用X射线单晶测试确定两类铬(III)配合物都具有六配位的变形八面体构型. 在MAO或AlEtCl₂作用下, 这些铬配合物可高活性地催化乙烯齐聚或聚合, 其催化乙烯反应特征依赖于配体中桥联胺的键联形式. 2-(二苯基膦)-N-[2-(二芳基膦)亚苄基]苯胺铬配合物1a～1e催化乙烯聚合, 无齐聚物生成; 而2-(二苯基膦)-N-[2-(二芳基膦)苄基]苯亚胺铬配合物2a～2e表现出较高的乙烯三聚选择性.

关键词: 铬配合物, 乙烯齐聚, 乙烯聚合

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

引用此文

刘清云, 高榕, 侯俊先, 孙文华. 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[J]. 有机化学, 2013, 33(04): 808-814.

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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