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Volumn , Issue , 2007, Pages 37-82

Fluorenyl-containing catalysts for stereoselective propylene polymerization

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EID: 84884952555     PISSN: None     EISSN: None     Source Type: Book    
DOI: None     Document Type: Chapter
Times cited : (3)

References (212)
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    • The term “site epimerization” is used in preference to other terms found in the literature. The term “epimerization”, Wiley-Interscience: NewYork, refers to the inversion of a single stereocenter when two or more are present, and can be correctly applied to metallocene polymerizations when the stereochemistry of the metal is inverted while the stereocenters present on the polymer chain remain unchanged. Reference 73 cites several colloquial terms found in the literature, including: Consecutive addition; skipped insertion; skipped-out insertions; chain migratory catalyst isomerization; back-skip mechanism; retention mechanism; isomerization without monomer insertion; site-to-site chain migration; side-to-side swing; back swing; and chain stationary insertion mechanism
    • The term “site epimerization” is used in preference to other terms found in the literature. The term “epimerization” (Eliel, E. L.; Wilen, S. H. Stereochemistry of Organic Compounds; Wiley-Interscience: NewYork, 1994; p 1198) refers to the inversion of a single stereocenter when two or more are present, and can be correctly applied to metallocene polymerizations when the stereochemistry of the metal is inverted while the stereocenters present on the polymer chain remain unchanged. Reference 73 cites several colloquial terms found in the literature, including: Consecutive addition; skipped insertion; skipped-out insertions; chain migratory catalyst isomerization; back-skip mechanism; retention mechanism; isomerization without monomer insertion; site-to-site chain migration; side-to-side swing; back swing; and chain stationary insertion mechanism.
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    • Technically, the compounds are listed in order of increasing CAS number. For the benzo substituted metallocenes s-49 and s-5, large numbers of related catalysts have been reported in the patent literature and thus, only representative examples are depicted, and use. U.S. Patent 5,451,649 (Phillips Petroleum Company), September 19
    • Technically, the compounds are listed in order of increasing CAS number. For the benzo substituted metallocenes s-49 and s-5, large numbers of related catalysts have been reported in the patent literature and thus, only representative examples are depicted: (a) Zenk, R.; Alt, H. G.; Welch, M. B. Organometallic fluorenyl compounds, preparation, and use. U.S. Patent 5,451,649 (Phillips Petroleum Company), September 19, 1995.
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    • For the silyl ether metallocene s-94, large numbers of related catalysts have been reported in the patent literature and thus, only a representative example is depicted, U.S. Patent 6,534,665 B1 (Repsol Quimica S.A.), March 18
    • For the silyl ether metallocene s-94, large numbers of related catalysts have been reported in the patent literature and thus, only a representative example is depicted. Nunez, M. F. M.; Lafuente, A. M.-E.; Garcia, B. P.; Canas, P. L. Single-carbon bridged biscyclopentadienyl compounds and metallocene complexes thereof. U.S. Patent 6,534,665 B1 (Repsol Quimica S.A.), March 18, 2003.
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