Polymerization of propylene by silylene- and germylene-bridged group 4 metallocenes
KOBUNSHI RONBUNSHU(2002)
Abstract
In order to compare with silylene-bridged group 4 metallocenes, C-2 symmetric dimethylgermylene-bridged zirconocene and hafnocene dichlorides were prepared and employed as the catalyst for polymerization of propylene in combination with methylaluminoxane (MAO). Germylene-bridged metallocenes always produced isotactic polypropylene of higher molecular weight than that produced by silylene-bridged analogues. The molecular structures of four metallocenes prepared from dimethylsilylene and germylenebis(2,3,5-trimethylcyclopentadienyl) were detemined by X-ray diffraction and showed no substantial differences of geometry between silylene- and germylene-bridged ones.
MoreTranslated text
Key words
polymer,propylene,group 4 metallocene,zirconocene,hafnocene,isotactic polymerization,germylene bridge,silylene bridge,X-ray structure
AI Read Science
Must-Reading Tree
Example
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
Generate MRT to find the research sequence of this paper
Chat Paper
Summary is being generated by the instructions you defined