、 2,2-bis(3-trimethylsilyl-indenyl)propane 、 2,2-Bis(3-t-butyl-cyclopentadienyl)propane 在
正戊烷 、 乙醚 作用下,
以1.97 g of pure rac-isopropylidene-bis(3-t-butyl-cyclopentadienyl)zirconium dichloride was obtained (yield 22%)的产率得到
参考文献:
名称:
Metallocene compounds, process for their preparation, and their use in catalysts for the polymerization of olefins
Metallocene compounds, process for their preparation, and their use in catalysts for the polymerization of olefins
申请人:BASELL TECHNOLOGY COMPANY BV
公开号:US20030120015A1
公开(公告)日:2003-06-26
A class of metallocene compounds having two cyclopentadienyl rings bridged by an alkylidene group is disclosed. These metallocene compounds can be suitably used as catalyst components for the polymerization of olefins. In particular, by polymerising propylene in the presence of a catalyst based on these metallocene compounds, polymers having very high isotactic indexes, high molecular weights and narrow molecular weight distributions can be obtained in high yields.
Process for the preparation of cyclopentadienyl compounds and compounds
申请人:Montell Technology Company bv
公开号:US06043403A1
公开(公告)日:2000-03-28
A process is disclosed for preparing bis-cyclopentadienyl compounds bridged by a single carbon atom by reacting a carbonyl compound with a cyclopentadienyl compound in the presence of a base and of an oxygen-containing solvent having an atomic ratio carbon/oxygen not higher than 3. The compounds obtainable in high yields with this simple single-step process can be used to prepare ansa-metallocenes which are active as catalyst components in the polymerization of olefins.