Article

Synthesis, Structure and Ethylene Polymerization Behavior of Group 4 Metal Complexes Bearing Salicylaldaminato Ligands with Appended Donor Functionality

  • Wang Xinke ,
  • Sit Met-Met ,
  • Sun Jiea ,
  • Tang Yong ,
  • Xie Zuowei
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  • a State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China;
    b Shanghai-Hong Kong Joint Lab in Chemical Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China;
    c Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China

Received date: 2012-06-25

  Online published: 2012-08-14

Supported by

Supporting information for this article is available free of charge via the Internet at http://sioc-journal.cn Project supported by the National Natural Science Foundation of China (No. 20932008), NSFC/RGC Joint Research Scheme (No. N_CUHK470/10 to ZX and No. 21061160493 to TY) and the CAS-Croucher Funding Scheme (No. GJHZ200816).

Abstract

A series of group 4 metal complexes were synthesized by an equimolar reaction of M(CH2Ph)4 with (E)-2,4-di-tert-butyl-6-[(phenylimino)methyl]phenol bearing donor functionality. This process involved toluene elimination followed by an intramolecular migration reaction of one benzyl group from metal to the imino carbon, which was supported by the isolation and structural characterization of the intermediate. These new complexes were fully characterized by multinuclear NMR spectroscopy, elemental analyses and X-ray analyses. The titanium complexes showed a very high activity in both ethylene polymerization and ethylene/1-hexene copolymerization upon activation with modified methylaluminoxane (MMAO), whereas the corresponding zirconium and hafnium complexes were almost inactive under the same reaction conditions.

Cite this article

Wang Xinke , Sit Met-Met , Sun Jiea , Tang Yong , Xie Zuowei . Synthesis, Structure and Ethylene Polymerization Behavior of Group 4 Metal Complexes Bearing Salicylaldaminato Ligands with Appended Donor Functionality[J]. Acta Chimica Sinica, 2012 , 70(18) : 1909 -1916 . DOI: 10.6023/A12060342

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