ansa-Metallocene Complexes(Ⅳ)——Synthesis, Structure and Application in Ethylene Polymerization of Sila-bridged Substituted Cyclopentadienyl Titanium and Zirconium

Abstract

Abstract: Tetramethyldisilane-bridged substituted cyclopentadienyl ligands react with n-butyl lithium and MCl₄·2THFto give tetramethyldisilane-bridged substituted cyclopentadienyl metallocene dichlorides(Me₂SiSiMe₂)(C₅H₄R)(C₅H₄R')MCl₂[R=H, R'=t-Bu, M=Ti(1), Zr(2), Hf(3); R=H, R'=Me, M=Ti(Ê); R=R=Me, M=Ti(5), Zr(6)]. Complexes 1₆ were characterized by ¹H NMR, mass spectra and elemental analyses. The crystal structure of 1 was determined by X-ray diffraction analysis. The complexes 1_3 and 6 were used for the polymerization of ethylene after activation with methyl aluminoxane(MAO).

Key words: ansa-Metallocene, Sila-bridged, Titanium, Zirconium, Catalyst for polymerization of ethylene

CLC Number:

O627

TrendMD:

SUN Xiu-Li, WANG Bai-Quan, XU Shan-Sheng, ZHOU Xiu-Zhong, ZHAO Jian, HU You-Liang . ansa-Metallocene Complexes(Ⅳ)——Synthesis, Structure and Application in Ethylene Polymerization of Sila-bridged Substituted Cyclopentadienyl Titanium and Zirconium[J]. Chem. J. Chinese Universities, 2000, 21(2): 222.

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ansa-Metallocene Complexes(Ⅳ)——Synthesis, Structure and Application in Ethylene Polymerization of Sila-bridged Substituted Cyclopentadienyl Titanium and Zirconium

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