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.

 
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< Catalyst for olefin polymerization and method of polymerization of olefin

< Recovery of ethylene and propylene from a methanol to olefin reaction system

> Method for preparing a homo-and co-polymers by polymerization of cyclic olefin compounds using fluorine-containing aromatic hydrocarbon compound as catalyst activator

> High temperature process for the production of atactic, amorphous, tacky propylene polymers

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