Title of article
Catalytic syntheses of alternating, stereoregular ethylene/cycloolefin copolymers
Author/Authors
Adrien R. Lavoie، نويسنده , , Robert M. Waymouth، نويسنده ,
Issue Information
هفته نامه با شماره پیاپی سال 2004
Pages
9
From page
7147
To page
7155
Abstract
The alternating stereospecific copolymerization of ethylene with cycloolefins (cyclopentene, cycloheptene, and cyclooctene) has been investigated with a series of constrained geometry titanium catalysts (CGCs). The metallocene IndSiMe2(tBuN)TiCl2 was found to generate highly alternating and stereoregular cycloolefin-co-ethylene polymers while Me4CpSiMe2(tBuN)TiCl2 produced alternating atactic polymers. In addition, novel Ti-complexes of the general formula benz[6.7]indenylSiMe2(tBuN)TiMe2 were synthesized and fully characterized. The chiral indenyl Ti complexes were found to produce exclusive 1,2-enchainment of the cycloolefin to generate highly stereoregular and alternating copolymers.
Keywords
Cycloolefin , Cycloheptene , Cyclopentene , Alternating copolymers , Cyclooctene , Constrained-geometry , Ziegler–Natta catalysis
Journal title
Tetrahedron
Serial Year
2004
Journal title
Tetrahedron
Record number
1086942
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