ansa-Metallocenes with a Ph2Si bridge: molecular structures of HfCl2[Ph2Si(η5-C13H8)(η5-C5H4)] and HfCl2[Ph2Si(C13H9)(η5-C5H4)]2†
作者:Vyacheslav V. Izmer、Anton Y. Agarkov、Valentina M. Nosova、Lyudmila G. Kuz’mina、Judith A. K. Howard、Irina P. Beletskaya、Alexander Z. Voskoboynikov
DOI:10.1039/b009280k
日期:——
A mixture of rac- and meso-HfCl2[Ph2Si(η5-C9H6)2] was synthesized by treatment of HfCl4 with the dilithium salt of di(1H-inden-1-yl)diphenylsilane. These complexes were isolated after fractional crystallization in 15.5 and 8.5% yields, respectively. A sterically strained ansa complex HfCl2[Ph2Si(η5-C13H8)(η5-C5H4)] was synthesized in 62% yield by treatment of HfCl4 with the dilithium salt of cyclopentadienyl(fluoren-9-yl)diphenylsilane. Both this compound, and the by-product of reaction, HfCl2[Ph2Si(C13H9)(η5-C5H4)]2, were characterized by crystal structure analysis.
Novel C1 symmetric zirconocenes containing substituted indenyl moieties for the stereoregular polymerization of propylene
作者:John J. Esteb、James C.W. Chien、Marvin D. Rausch
DOI:10.1016/j.jorganchem.2003.08.040
日期:2003.12
The synthesis and polymerization behavior of four new asymmetric ansa-metallocenes containing a fluorenyl moiety and a substituted indenyl moiety is reported. The zirconocenes diphenylsilylene-(η5-9-fluorenyl)-[η5-1-(3-t-butyl)indenyl]-zirconium dichloride (4), dimethylsilylene-(η5-9-fluorenyl)-[η5-1-(3-t-butyl)indenyl]-zirconium dichloride (5), ethylene-1-(η5-9-fluorenyl)-2-[η5-1-(3-t-butyl)indenyl]-zirconium
ansa-Metallocenkomplexe des Typs (C13H8SiR2C9H6−nR′n)ZrCl2 (n=0,1; R=Me,Ph,Alkenyl; R′=Alkyl,Alkenyl): Selbstimmobilisierende Katalysatorvorstufen für die Ethylenpolymerisation
作者:Helmut G. Alt、Michael Jung
DOI:10.1016/s0022-328x(98)00538-5
日期:1998.7
(19 new) ansa-metallocenecomplexes of the type (C13H8SiR2C9H6−nR′n)ZrCl2 (n=0, 1; R=Me, Ph, alkenyl; R′=alkyl, alkenyl) have been synthezised, characterized and tested for catalyticethylenepolymerization after activation with methylaluminoxane (MAO). The substituents R in the bridge and the substituents R′ in the 3-position of the indenylidene moiety have an influence on the activity of the catalysts
二十四(19新)袢的类型的柄型-茂金属配合物(C 13 H ^ 8 SiR 2 C 9 ħ 6- Ñ R' Ñ)的ZrCl 2(Ñ = 0,1; R = Me中,PH,链烯基;在用甲基铝氧烷(MAO)活化后,已经合成,表征和测试了R'=烷基,烯基)的催化乙烯聚合。桥联基和茚基亚烷基部分的3-位上的取代基R'对催化剂的活性和所形成的聚合物的分子量有影响。该ω-烯基取代基R和R'使相应的催化剂与单体在活化时发生共聚反应,从而通过自固定化过程得到多相催化剂。
Preparation of silyl-bridged fluorenyl-cyclopentadienyl ligands and silyl-bridged fluorenyl-cyclopentadienyl metallocenes
申请人:Basell Polyolefine GmbH
公开号:US06346635B1
公开(公告)日:2002-02-12
A simplified process for the industrial preparation of silyl-bridged fluorenyl-cyclopentadienyl ligands and also a process for preparing silyl-bridged fluorenyl-cyclopentadienyl metallocenes are described.