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Metal Complex Catalysts Supercritical Fluid Polymerization Supramolecular Architecture - Advances in Polymer Science 133 (Paperback)
  • Metal Complex Catalysts Supercritical Fluid Polymerization Supramolecular Architecture - Advances in Polymer Science 133 (Paperback)
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Metal Complex Catalysts Supercritical Fluid Polymerization Supramolecular Architecture - Advances in Polymer Science 133 (Paperback)

(author of contributions), (author of contributions), (author of contributions), (author of contributions), (author of contributions), (author of contributions), (author of contributions), (author of contributions)
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Paperback 207 Pages / Published: 03/10/2013
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Thepolymerizationofole nsanddi-ole nsisoneofthemostimportanttargets inpolymerscience.Thisreviewarticledescribesrecentprogressinthis eldand deals with organo-transition metal complexes as polymerization catalysts. - cent developments in organometallic chemistry have prompted us to nd a precise description of the mechanism of propagation, chain transfer, and terminationstepsinthehomogeneouslymetal-assistedpolymerizationofole ns anddiole ns.Thus,thisdevelopmentprovidesanideafordesigninganycatalyst systems that are of interest in industry. Recently,the agostic interactionofalkylgroup(s)ontransitionmetalshas emerged as highly basic and new concept and is found to be important in understandingthemechanismofthemetal-catalyzedhomogeneousoligomer- ation and polymerization of a-ole ns. Early transition metal alkyl complexes generallyhavepartiallyionicM-C bondsandshowa-agostichydrogeninter- tion that somewhat stabilizes the catalytically active species by providing el- tronsatavacantsite onthe metal.Thisisinsharp contrasttothefactthatlate transition metal alkyl complexes show mainly b-agostic hydrogen interaction that causes the hydrogen transfer easily through b-hydrogen elimination and reductive elimination, and that gives rise to the oligomerization of ole ns. Organometalliccomplexesoftheearlyandlatetransitionmetalshavebeenused as catalysts for ole n oligomerization and polymerization. The mechanism involved in these catalyst systems depends very much upon the kind of metal centersaswellastheirco-ligands,andthusthedi?erentmechanismswhichcan bedistinguishedbydetailedinvestigationsshouldbeassumedforearlyandlate transition metal catalysts. In this contribution, we review the mechanism of polymerization and oligomerization involving early transition metals, taking as our basis recent resultsinadvancedorganometallicchemistry.Firstofall,somerecentexamples of the previous reviews concerning the Ziegler-Natta polymerization are cited [1-10]. Then, relevant new reports are surveyed in a systematic fashion.

Publisher: Springer-Verlag Berlin and Heidelberg GmbH & Co. KG
ISBN: 9783662147931
Number of pages: 207
Weight: 338 g
Dimensions: 235 x 155 x 12 mm
Edition: Softcover reprint of the original 1st ed. 199

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