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



刘清云a,b, 高榕b, 侯俊先b, 孙文华b   

  1. 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
  • 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 Qingyuna,b, Gao Rongb, Hou Junxianb, Sun Wenhuab   

  1. 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 1a1e bearing 2-(diphenylphosphino)-N-[2-(diarylphosphino)benzyli- dene]anilines preceded ethylene polymerization without observing any oligomers, meanwhile chromium complexes 2a2e 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