An organometallic compound obtainable by contacting
a) a compound having the following formula (I):
1
wherein R
a
, R
b
, R
c
and R
d
equal to or different from each other are hydrocarbon groups
b) a Lewis acid of formula (II)
MtR
1
3
(II)
wherein Mt is a metal belonging to Group 13 of the Periodic Table of the Elements (IUPAC); R
1
, equal to or different from each other, are selected from the group consisting of halogen, halogenated C
6
-C
20
aryl and halogenated C
7
-C
20
alkylaryl groups; two R
1
groups can also form with the metal Mt one condensed ring.
These compounds are useful as cocatalysts for polymerizing olefins.
一种有机
金属化合物,可通过接触 a)具有下式(I)的化合物而获得: 1 其中 R a、R b、R c 和 R d 同为或互不相同,均为烃基 b) 式(II)的
路易斯酸 MtR 1 3 (II) 其中 Mt 为属于元素周期表(IU
PAC)第 13 族的
金属;R 1 同为或互不相同,选自卤素、卤代 C 6 -C 20 芳基和卤代 C 7 -C 20 烷芳基组成的组;两个 R 1 基团也可与
金属 Mt 形成一个缩合环。 这些化合物可用作聚合烯烃的催化剂。