Silicon-bridged transition metal compounds

Details Silicon-bridged transition metal compounds Silicon-bridged transition metal compounds

1993-12-02

1995-08-15

Pal, Asok

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Plural component system comprising a - group i to iv metal...

502117, 502152, 526126, 526127, 526160, 526170, 5263482, 5263484, C07F 702, C08F 442, C08F 464

Patent

active

054419204

ABSTRACT:
Silicon-bridged transition metal compounds and their use as alpha-olefin polymerization catalysts are disclosed. The polymerization catalyst comprises a chiral silicon-bridged metallocene of the following structure: ##STR1## where M is a transition metal, X' and X" are the same or different hydride, halogen, hydrocarbyl or halohydrocarbyl groups having up to about 6 carbon atoms, A' and A" are each the same or different asymmetrical mononuclear or polynuclear hydrocarbyl or silahydrocarbyl moieties and S' is a bridge of 1-4 atoms selected from the group consisting of silanylene, silaalkylene, oxasilanylene, and oxasilaalkylene, and may include an alumoxane. Specifically, the transition metals are titanium, zirconium, and hafnium.

REFERENCES:
patent: 4794096 (1988-12-01), Ewen
Schnutenhaus, et al. "1,1'-Trimethylenebis (.eta..sup.5 -3-tert-butylcyclopentadienyl)-titanium (IV) Dichloride, a Chiral ansa--Titanocene Derivative", Angew. Chem. Int. Ed. Engl. 18, (1979), pp. 777-778.
Smith, et al., "Molecular Structure and Proton Magnetic Resonance Spectra of Methylene--and Ethylene--Bridged Dicyclopentadienyltitanium Compounds", Journal of Organometallic Chemistry, 173 (1979), pp. 175-185.
Katz, et al., "1-1'-Methylenetitanocene Dichloride", Tetrahedron Letters, No. 28, (1970), p. 2497-2499.
Smith, et al., "ansa-Metallocene Derivatives III. Influence of an Interannular Ethylene Bridge on the Reactivity of Titanocene Derivatives", Journal of Organometallic Chemistry, 218 (1981), pp. 159-167.
Davis, et al., "The Proton and Carbon NMR Spectra of Alkyl Substituted Titanocene and Zirconocene Dichlorides", Journal of Magnetic Resonance, 37, (1980), pp. 441-448.
Klouras, N., "Metallocenophane: .sup.1 H-NMR-Untersuchungen", Z. Naturforsch, 38b (1983), pp. 321-325.
Kopf-Maier, et al., "Turmorhemmung durch Metallocene Ring Substituierte und ringuberbruckte Titanocen-dichloride", Eur. J. Med. Chem.--Chimica Therapeutica, No. 16, May-Jun. 1981, pp. 275-281.
Jutzi, et al., "Metallkomplexe mit verbruckten permethylierten Cyclopentadienylligenden", Chemische Berichte, vol. 119, No. 6, (1986), pp. 1750-1754.
Schwemlein, et al., "ansa-Metallocene Derivatives via Synthesis of Tetramethylethylene-Bridged Titanocene and Zirconocene Derivatives Via Reductive Fulvene Coupling", Journal of Organometallic Chemistry, 254, (1983) pp. 69-73.
Schwemlein, et al., "ansa-Metallocene Derivatives VI. Synthesis and Molecular Structure of a Stable Tetramethylethylene-Bridged Chromocene Carbonyl Complex, (CH.sub.3).sub.4 C.sub.2 (C.sub.5 H.sub.4)Cr(CO)", Journal of Organometallic Chemistry, 256 (1983), pp. 285-289.
Kulper, K., "Polymerization Behavior of Soluble Ring-Substituted Zirconocene (IV) Dichlorides and Methyl Alumoxanes as Well as Other Cocatalysts with Respect to 1-Olefins", Dissertation for Ph.D., Jan., 1985.
Langer, A. W., Lect. Bicnn. Polym. Symp. 7th (1974); Ann. N.Y. Acad. Sci. 295, 110-126 (1977).
Ewen, J. A., J. Amer. Chem. Soc., v. 106, p. 6355 (1984).
Boor, Jr. J., Ziegler-Natta Catalysts and Polymerizations, Academic Press, New York 1979.
Natta, G., et al., Chem. Ind. (Milan) 42, 125 (1960).
Zambelli et al, Makromol. Chem. 112, 183 (1968).
Zambelli, et al, Macromolecules, v. 16, pp. 341-348 (1983).
Kaminsky, W., et al, Angew. Chem. Int. Ed. Eng.; 24, 507-508 (1985).
Natta, J. Inorg. Nucl. Chem. 8, 589 (1958).
Wild et al, J. Organomet. Chem. 232, 233-47 (1982).
Martin et al, J. Organomet. Chem. 97, 261-273 (1975).
Couturier et al, J. Organomet. Chem. 195, 291-306 (1980).
Soga et al., Makromol. Chem. Rapid Commun. 8, 305-310 (1987).

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