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Chinese Journal of Organic Chemistry >

2018 , Vol. 38 >Issue 6: 1544 - 1548

DOI: https://doi.org/10.6023/cjoc201801004

Notes

Synthesis of Tritertbutylphosphinimine Phenoxy Titanium Complexes and Their Catalytic Performance to Ethylene Polymerization

  • Wang Tieshi ,
  • Chen Jianjun ,
  • Ye Lin ,
  • Zhang Aiying ,
  • Feng Zengguo
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  • a School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081;
    b Sinopec Yanshan Branch, Beijing Research Institute of Chemical Industry, Beijing 102500;
    c Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, Beijing 100081

Received date: 2018-01-04

  Revised date: 2018-02-09

  Online published: 2018-03-08

Supported by

Project supported by the Technology Development Project of China Petroleum & Chemical Corporation (Sinopec) (No. 214002).

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Abstract

Tritertbutylphosphinimine phenoxy titanium complexes (t-Bu3)PNTi(OAr)Cl2 [Ar=C6H5(4a), 2,6-Me2C6H3 (4b), 2,6-i-Pr2C6H3 (4c) and 2,6-t-Bu2C6H3 (4d)] were synthesized via the reaction of corresponding substituted phenol lithium salts with tritertbutylphosphinimine trichloride titanium (3). The compounds were characterized by means of 1H NMR, 13C NMR, 31P NMR spectroscopic and elemental analyses, and the molecular structures of 3, 4b and 4d were further confirmed by single-crystal X-ray diffraction analysis. When activated with methylaluminoxane (MAO), 4a~4d displayed not only high catalytic activities, but also increasing performances on ethylene polymerization with increasing the sterical hindrance of substituents. Furthermore, 4c depicted a good thermal stability, with which the polyethylene products of different molecular weights and molecular weight distributions can be obtained by tuning the polymerization conditions.

Key words： tritertbutylphosphinimine; substituted phenoxy; titanium complex; ethylene polymerization

Cite this article

Wang Tieshi , Chen Jianjun , Ye Lin , Zhang Aiying , Feng Zengguo . Synthesis of Tritertbutylphosphinimine Phenoxy Titanium Complexes and Their Catalytic Performance to Ethylene Polymerization[J]. Chinese Journal of Organic Chemistry, 2018 , 38(6) : 1544 -1548 . DOI: 10.6023/cjoc201801004

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