An asymmetric complex of formula (I)
wherein
M is zirconium or hafnium;
each X is a sigma ligand;
L is a divalent bridge selected from -R'2C-, -R'2C-CR'2-, -R'2Si-, -R'2Si-SiR'2-, -R'2Ge-, wherein each R' is independently a hydrogen atom, C1-C20-alkyl, tri(C1-C20-alkyl)silyl, C6-C20-aryl, C7-C20-arylalkyl or C7-C20-alkylaryl;
R2 and R2' are each independently a C1-C20 hydrocarbyl radical;
R5' is a C1-20 hydrocarbyl group;
R5 is hydrogen, or a C1-20 hydrocarbyl group;
R6 is a non tertiary C1-10 alkyl group or C6-10-aryl group or C7-10 arylalkyl group or ZR3;
R6' is a tertiary C4-20 alkyl group;
R3 is a C1-20 hydrocarbyl group optionally substituted with halo;
Ar is an aryl or heteroaryl group having up to 20 carbon atoms optionally substituted by one or more groups R1;
Ar' is an aryl or heteroaryl group having up to 20 carbon atoms optionally substituted by one or more groups R1;
each R1 is a C1-20 hydrocarbyl group or two R1 groups on adjacent carbon atoms taken together can form a fused 5 or 6 membered ring with the Ar group, said ring being itself optionally substituted with one or more groups R4; and
each R4 is a C1-20 hydrocarbyl group.
式(I)的不对称络合物
其中
M 是
锆或
铪
每个 X 均为 sigma
配体;
L 是选自 -R'2C-、-R'2C-CR'2-、-R'2Si-、-R'2Si-SiR'2-、-R'2Ge- 的二价桥,其中每个 R' 独立地为氢原子、C1-C20-烷基、三(C1-C20-烷基)
硅烷基、C6-C20-芳基、C7-C20-芳基烷基或 C7-C20- 烷基芳基;
R2 和 R2'各自独立地为 C1-C20 碳氢基;
R5' 是一个 C1-20 碳氢基团;
R5 是氢或 C1-20 烃基;
R6 是非叔代 C1-10 烷基或 C6-10 芳基或 C7-10 芳烷基或 ZR3;
R6'是一个叔C4-20烷基;
R3 是任选被卤素取代的 C1-20 烃基;
Ar 是具有多达 20 个碳原子的芳基或杂芳基,可选择被一个或多个基团 R1 取代;
Ar'是具有多达 20 个碳原子的芳基或杂芳基,可选择被一个或多个基团 R1 取代;
每个 R1 是一个 C1-20 碳氢基团,或相邻碳原子上的两个 R1 基团加在一起可与 Ar 基团形成一个融合的 5 或 6 成员环,所述环本身可选择被一个或多个基团 R4 取代;以及
每个 R4 均为 C1-20 烃基。