Transition-Metal-Assisted Polymerization

Monomers based on oxythiophenes are polymerized by either oxidative or transition-metal-assisted polymerization. The oxidative polymerization is... 

Transition-metal-assisted polymerization of oxythiophenes is carried out using various transition-metal catalysts known for C-C bond formation reactions. Transition-metal-assisted polymerization methods are more stringent in terms of reaction conditions but give better quality materials (high molecular weight and regioregularity) compared to oxidative polymerization methods.The common drawbacks in many transition-metal-assisted polymerization routes are the use of organometallic catalysts that are expensive, formation of toxic... 

The polymerization of olefins and di-olefins is one of the most important targets in polymer science. This review article describes recent progress in this field and deals with organo-transition metal complexes as polymerization catalysts. Recent developments in organometallic chemistry have prompted us to find a precise description of the mechanism of propagation, chain transfer, and termination steps in the homogeneously metal-assisted polymerization of olefins and diolefins. Thus, this development provides an idea for designing any catalyst systems that are of interest in industry. 

R. Schrock as an "Erwin Schrddinger Fellow". In 1995 he accepted a position as an Assistant Professsor at the University of Innsbruck, where he finished his Habilitation in Macromolecular Chemistry in 1998. Since 1998, he has held a faculty position as an Associate Professor. His research interests focus on transition-metal-catalyzed polymerizations, heterogeneous polymeric systems and their applications in the areas of heterogeneous catalysis, as well as separation and life sciences. 

Masashi Shiotsuki is assistant professor at Kyoto Univereity. His research interests indude transition metal-catalyzed polymerization and chemistry of substituted polyacetylenes and other conjugated polymere. So far he has published about 130 original papers and about 10 review artides. 

Polymerization Assisted by Organometallic Compounds of Other Transition Metals... 

Klaus H. Theopold was born in Berlin, studied at the Universitat Hamburg for his Vordiplom in 1977, and at UC Berkeley, where he obtained his PhD in 1982 under the direction of Professor R. G. Bergman. After spending a year as postdoctoral fellow in the laboratory of Professor R. R. Schrock at MIT, he began his independent career in 1983 as an Assistant Professor at Cornell University. In 1990 he moved to the University of Delaware, where he is currently Professor of Chemistry. His scientific interests encompass synthetic and mechanistic studies of transition metal compounds, in particular paramagnetic organometal-lics, polymerization catalysis, and coordination compounds relevant to the activation of O2. 

The ATP process developed by Sawamoto and coworkers [226], uses an initiating system consisting of carbon tetrachloride, dichlorotri(triphenyl-phosphine)-ruthenium (II) and methylaluminum bis(2,6-di-fe/"f-butylphenoxide) to polymerize methyl methacrylate [226]. The polymerization involves reversible and homolytic cleavages of carbon-halogen terminal groups assisted by transition metal complexes [226]. 

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