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Chinese Journal of Organic Chemistry >

2013 , Vol. 33 >Issue 04: 808 - 814

DOI: https://doi.org/10.6023/cjoc201302022

Articles

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

  • Liu Qingyun ,
  • Gao Rong ,
  • Hou Junxian ,
  • Sun Wenhua
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  • 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 date: 2013-02-28

  Revised date: 2013-03-22

  Online published: 2013-03-28

Supported by

Project supported by the National Natural Science Foundation of China (No. 51273202).

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Abstract

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

Cite this article

Liu Qingyun , Gao Rong , Hou Junxian , Sun Wenhua . Tridentate P^N^P Chromium Complexes: Synthesis, Character-ization and Their Ethylene Oligomerization and Polymerization[J]. Chinese Journal of Organic Chemistry, 2013 , 33(04) : 808 -814 . DOI: 10.6023/cjoc201302022

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