申请人:——
公开号:US20030148877A1
公开(公告)日:2003-08-07
A class of metallocenes of formula (I): (ZR
1
m
)
n
(Cp)(A)
r
ML
p
L′
q
(I) wherein ZR
1
m
) is a divalent group bridging Cp and A, Cp is a heterocyclic cyclopentadienyl group of formula (II) or (II′), wherein one of X or Y is a single bond, the other being an heteroatom; R
2
and R
3
are hydrogen, halogen or a hydrocarbon radical, optionally containing heteroatoms; R
4
is a halogen or an hydrocarbon radical, optionally containing heteroatoms; the group A is a cyclopentadienyl derivative or is equal to Cp; M is Ti, Zr or Hf; m is 1 or 2; n ranges from 0 to 4; r is 0 or 1; p and q range from 0 to 3; and a ranges from 0 to 4. Moreover, are disclosed catalyst systems containing these metallocenes, useful in the polymerization of olefins.
1
一类配合物,其化学式为(I):(ZR1m)n(Cp)(A)rMLpL′q(I),其中ZR1m)是连接Cp和A的二价基团,Cp是化学式(II)或(II′)的杂环戊二烯基团,其中X或Y之一是单键,另一个是杂原子;R2和R3是氢,卤素或含有杂原子的碳氢基团,R4是卤素或含有杂原子的碳氢基团;基团A是环戊二烯基衍生物或等于Cp;M是钛、锆或铪,m为1或2;n范围从0到4;r为0或1;p和q范围从0到3;a范围从0到4。此外,还披露了包含这些配合物的催化剂体系,可用于烯烃聚合。