An olefin polymerization catalyst system is prepared from a catalyst of formula
I or II:
##STR1##
R1-R7 and R1-R12 in
formulae I and II, respectively, are each independently —H, -halo, —NO2,
—CN, —(C1-C30)hydrocarbyl, —O(C1-C30)hydrocarbyl,
—N((C1-C30)hydrocarbyl)2, —Si((C1-C30)hydrocarbyl)3,
—(C1-C30)heterohydrocarbyl, -aryl, or -heteroaryl,
each being unsubstituted or substituted with one or more —R8 and
—R12 groups, respectively. Two R1-R7 can
be joined to form a cyclic group. R8 in formula I is -halo, —(C1-C30)hydrocarbyl,
—O(C1-C30)hydrocarbyl, —NO2, —CN,
—Si((C1-C30)hydrocarbyl)3, —N((C1-C30)hydrocarbyl)2,
—(C1-C30)heterohydrocarbyl, -aryl, or -heteroaryl.
T in formula I is —CR9R10— wherein R9 and
R10 are defined as for R1 above. R12 is independently
-halo, —NO2, —CN, —(C1-C30)hydrocarbyl,
—O(C1-C30)hydrocarbyl, —N((C1-C30)hydrocarbyl)2,
—Si((C1-C30)hydrocarbyl)3, —(C1-C30)heterohydrocarbyl,
-aryl, or -heteroaryl. E, M, m, X, Y, and n in formulae I and II are defined herein.