Ansa Metallocene Complexes(Ⅲ)--Synthesis and Application in Ethylene Polymerization of Sila bridged Bis(indenyl and tetrahydroindenyl) Titanium and Zirconium Complexes

Abstract

Abstract: Tetramethyldisilane bridged bis(1 indenyl and tetrahydroindenyl)Metal ocene dichlorides(Me₂SiSiMe₂)Ind₂MCl₂[M=Ti(1), Zr(2)]and(Me₂SiSiMe₂)[IndH₄]₂MCl₂[M=Ti(3), Zr(4)]were synthesized.Complexes 1-4 were characterized by ¹H NMR, mass spect ra and elemental analyses.Complexes 3 and 4 were used for The polymerization of ethylene after activation with methyl aluminox ane(MAO)at different temperatures and normal pressure.The titanocene 3 shows a lower activity but produces polyet hylene with a higher molecular weight t han zirconocene 4.The catalyst systems show a dependency of the activity and molecular weighton tem perature.

Key words: Ansa Metallocene, Sila bridged, Titanium, Zirconium

CLC Number:

O627

TrendMD:

WANG Bai-Quan, XU Shan-Sheng, ZHOU Xiu-Zhong, SU LI-Ming, FENG Ru, HE Da-Wei . Ansa Metallocene Complexes(Ⅲ)--Synthesis and Application in Ethylene Polymerization of Sila bridged Bis(indenyl and tetrahydroindenyl) Titanium and Zirconium Complexes[J]. Chem. J. Chinese Universities, 1999, 20(1): 77.

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Ansa Metallocene Complexes(Ⅲ)--Synthesis and Application in Ethylene Polymerization of Sila bridged Bis(indenyl and tetrahydroindenyl) Titanium and Zirconium Complexes

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