申请人:Hafner Norbert
公开号:US20140221584A1
公开(公告)日:2014-08-07
A racemic complex of formula (I), wherein M is zirconium or hafnium; each X is a sigma ligand; L is a divalent bridge selected from —R′
2
C—, —R′
2
C—CR′
2
, —R′
2
Si—, —R′
2
Si—SiR′
2
—, —R′
2
Ge—, wherein each R′ is independently a hydrogen atom, C
1-20
-hydrocarbyl, tri(C
1-20
-alkyl)silyl, C
6-20
-aryl, C
7-20
-arylalkyl or C
7-20
-alkylaryl; R
2
and R
2
′ are each independently a C
1-20
hydrocarbyl radical optionally containing one or more heteroatoms from groups 14-16; R
5
′ is a C
1-20
hydrocarbyl group optionally containing one or more heteroatoms from groups 14-16 and optionally substituted by one or more halo atoms.
公式(I)的外消旋复合物,其中M为锆或铪;每个X是一个σ配体;L是从-R′2C-,-R′2C-CR′2,-R′2Si-,-R′2Si-SiR′2-,-R′2Ge-中选出的二价桥接基,其中每个R′独立地是氢原子,C1-20-烃基,三(C1-20-烷基)硅基,C6-20-芳基,C7-20-芳基烷基或C7-20-烷基芳基;R2和R2′各自独立地是一个C1-20烃基基团,可选地含有来自14-16族的一个或多个杂原子;R5′是一个C1-20烃基团,可选地含有来自14-16族的一个或多个杂原子,并可选地被一个或多个卤原子取代。