Synthesis, structures and polymerization catalytic properties of germyl-bridged bis(cyclopentadienyl) metallocenes

被引：10
|
作者：
Xu, SS
Dai, XL
Wang, BQ [1 ]
Zhou, XZ
机构：
[1] Nankai Univ, Dept Chem, State Key Lab Elementoorgan Chem, Tianjin 300071, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Organ Chem, State Key Lab Organomet Chem, Beijing 100864, Peoples R China
来源：
JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2002年 / 645卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
titanocene; zirconocene; metallocene; polymerization;
D O I：
10.1016/S0022-328X(01)01396-1
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The ansa-metallocene complexes Me2Ge(eta(5)-C5Me4)(2)MCl2 [M = Ti (1), Zr (2)], Me2Ge(eta(5)-C5H3Bu-t)(2)ZrCl2 (3) and Me2Ge(eta(5)-C5H4)(eta(5)-C5H3R)ZrCl2 [R = Me (4), t-Bu (5)] were prepared by the reaction of the corresponding ligands with n-BuLi and MCl4.2THF, respectively. The molecular structures of 1 and 2 have been determined by the X-ray diffraction method. Complexes 2-5 in combination with MAO were studied as catalysts for ethylene polymerization and all the germyl-bridged zirconocene catalysts show high activities at relative high temperatures. This indicates that the germyl-bridged zirconocene systems show thermally stable catalyst systems for polymerization of ethylene. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：262 / 267
页数：6
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