Metallocene compound and its use as catalyst component

Details Metallocene compound and its use as catalyst component Metallocene compound and its use as catalyst component

1999-07-15

2000-09-05

Nazario-Gonzalez, Porfirio

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

Organic compounds

Heavy metal containing

556 53, 502103, 502117, 526126, 526160, 526943, C07F 1700, C07F 728, C08F 444

Patent

active

061145564

ABSTRACT:
Metallocene compound and its use as catalyst component The present invention relates to a multinuclear metallocene compound of the formula I, ##STR1## where M.sup.1 is a tetravalent metal, L.sup.1 are, independently of one another, identical or different and are each a substituted cyclopentadienyl group, L.sup.2 and L.sup.3 are, independently of one another, identical or different and are each a .pi. ligand, B are, independently of one another, identical or different and are each a divalent bridging unit, X are, independently of one another, identical or different and are each a hydrogen atom, a halogen atom, a C.sub.1 -C.sub.10 -fluorocarbon radical or a hydrocarbon-containing radical having 1-40 carbon atoms, and k is an integer from 0 to 10. The metallocene compound of the present invention is suitable as a catalyst component for preparing olefin polymers.

REFERENCES:
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Aulbach et al., "Metallocene-massgeschneiderte Werkzeuge zur Herstellung von Polyolefinen", Chemie in unserer Zeit, 28. Jahrg 1994, Nr. 4.
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Diamond et al., "Synthesis of Homo- and Hetero-bimetallic Complexes incorporating the [(.eta..sup.5 -C.sub.5 H.sub.4) CMe.sub.2 (.eta..sup.5 -.eta..sup.5 -C.sub.9 H.sub.6)] Ligand", J. Chem. Soc., Chem. Commun., 1994, pp. 727-728.
Amorose et al., "1-Sila-3-metallacyclobutanes, Precursors for the Generation of Highly Electrophillic Group 4 Metallocene Alkyl Cations, Spectroscopic and Structural Evidence a Weakly Bound THF Ligand in [(C.sub.5 Me.sub.5)2 Zr(CH.sub.2 SiMe.sub.3)(THF)[[BPh.sub.4 ]", Organometallics 1991, 10, pp. 2191-2198.
Reddy et al., "Synthesis and Characterization of Binuclear Zirconocene Complexes Linked by a Bridged Bis(cyclopentadienyl) Ligand", Organometallics 1989, 8, pp. 2107-2113.
Reddy et al., "Synthesis and Characterization of Binuclear Zirconocenophane Hydrides. The Molecular Structure of [SiMe.sub.2 (C.sub.5 H.sub.4 ][(.eta. .sup.5 -C.sub.5 H.sub.5)ZrCl(.mu.-H).sub.2 ", Organometallics 1989, 8, pp. 547-549.
Kabi-Satpathy et al., "Synthesis and structural characterization of group 4 ansa-metallocene complexes containing a 1-sila-3-metallacyclobutane ring", Journal of Organometallic Chemistry, 364 (1989) pp. 105-117.

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