Metal Complex Catalysts Supercritical Fluid Polymerization Supramolecular Architecture (Paperback, Softcover reprint of the original 1st ed. 1997)

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.

General

Imprint:	Springer-Verlag
Country of origin:	Germany
Series:	Advances in Polymer Science, 133
Release date:	October 2013
First published:	1997
Contributors:	D a Canelas • J M Desimone • A. Harada • E Ihara • K Mashima • A. Nakamura • Y. Nakayama • H. Yasuda
Dimensions:	235 x 155 x 12mm (L x W x T)
Format:	Paperback
Pages:	207
Edition:	Softcover reprint of the original 1st ed. 1997
ISBN-13:	978-3-662-14793-1
Categories:	Books > Science & Mathematics > Physics > States of matter > General Books > Science & Mathematics > Chemistry > Organic chemistry > Polymer chemistry Promotions
LSN:	3-662-14793-9
Barcode:	9783662147931

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