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Chem. J. Chinese Universities ›› 2002, Vol. 23 ›› Issue (10): 1891.

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Ansa-metallocene Complexes(Ⅵ)—— Synthesis,Structure and Application in Ethylene Polymerization of Tetramethyldisiloxane-bridged Mixed Metallocene Complexes

XU Shan-Sheng1, WU Tao1, CUI Hui-Ling1, DAI Xu-Liang1, WANG Bai-Quan1,2, ZHOU Xiu-Zhong1, ZOU Feng-Lou3, LI Yang3   

  1. 1. Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianj in 300071, China;
    2. State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, CAS, Shanghai 200032, China;
    3. Research Institute of Beijing Yanshan Petrochemical Co.L td., Beijing 102500, China
  • Received:2001-07-06 Online:2002-10-24 Published:2002-10-24

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Abstract: Tetramethyldisiloxane-bridged asymmetric cyclopentadienyl ligands react with n-butyl lithium and MCl4·2THF to give tetramethyldisiloxane-bridged substituted asymmetric metallocenes(Me2SiSiMe2)(C5H4)(Cp′)MCl2[Cp′=C5H 3Bu-t, M=Ti(1), Zr(2); Cp′=C9H6, M=Ti(3), Zr(4)]. Complexes 1-4 were characterized by means of 1H NMR, mass spectra and elemental analyses. The crystal structure of complex 1 was determined by X-ray diffraction analysis. Complexes 1-4 were used for the catalytic polymerization of ethylene after the activation with methyl aluminoxane(MAO).

Key words: Ansa-metallocene, Olefin polymerization catalyst, Organometallic complexes

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