Bis(di-, tri- or tetra-substituted-cyclopentadienyl)-zirconium d

Details Bis(di-, tri- or tetra-substituted-cyclopentadienyl)-zirconium d Bis(di-, tri- or tetra-substituted-cyclopentadienyl)-zirconium d

1988-02-22

1989-10-17

Sneed, H. M. S.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

502117, C07F 700

Patent

active

048748803

ABSTRACT:
Bis(di-, tri- or tetra-substituted-cyclopentadienyl)zirconium dihalides represented by the following general formula [I] are provided, ##STR1## (wherein R.sup.1 denotes a substituent group on the cyclopentadienyl ring which is an alkyl radical of 1 to 5 carbon atoms; R.sub.2.sup.1 --C.sub.5 H.sub.3 stands for a di-substituted cyclopentadienyl radical; and X is a halogen atom).
This compound, when combined with an aluminoxane repesented by the following general formula [VII], gives a high-activity catalyst for the synthesis of polyolefins, ##STR2## (wherein m is an integer of 4 to 20; and R.sup.2 denotes a hydrocarbyl radical).

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Kaminsky, W., "Bis(Cyclopatadieayl) Zirkon-Verbirgdungen and Aluminoxarals Ziegler-Katalysaturen Fur Die Polymerisation and Copolymerization Ion Olefines", Makrom. Chem. Rapid Commun., 4, 417 (1983).

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