Download or read book Pyrazolyl Nickel and Palladium Complexes as Catalysts for Ethylene Oligomerization and Olefins and Carbon Monoxide Co polymerization Reactions written by Collins Obuah and published by . This book was released on 2011 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pyrazole and Pyrazolylethylamine Nickel II and Palladium II Complexes as Catalysts for Olefin Oligomerization and Friedel Crafts Alkylation Reactions written by Lerato Petunia Moeti and published by . This book was released on 2014 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ferrocenylpyrazolyl Nickel II and Palladium II Complexes as Pre catalysts for Ethylene and Higher alpha olefins Reactions written by Collins Obuah and published by . This book was released on 2014 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Copolymerization of Higher Olefins with Carbon Monoxide by Pd II Catalysts and Design of Nickel Palladium and Zirconium Complexes with Nitrogen based Ligands written by Mika Kettunen and published by . This book was released on 2004 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Evaluation of Ferrocenylpyrazolyl and Ferrocenylpyrazolyl phosphine Palladium and Nickel Complexes as Ethylene Oligomerization Catalysts written by Arnoux Van der Westhuizen and published by . This book was released on 2011 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bis pyrazolyl Chromium III Nickel II and Palladium II Complexes as Ethylene Oligomerization and Polymerization Catalysts written by Nangamso Alicia Miti and published by . This book was released on 2008 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Substituted Nickel Pyrazole and Palladium Pyrazolyl Complexes as Catalyst Precursors for Ethylene Polymerization written by Simphiwe Maurice Nelana and published by . This book was released on 2003 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nitrogen based Nickel and Palladium Complexes as Catalysts for Olefin Oligomerization Heck and Suzuki Coupling Reactions written by Simphiwe Maurice Nelana and published by . This book was released on 2007 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pyrazolyl Palladium II Complexes as Phenylacetylene Oligomerization and Polymerization Catalysts written by Tebogo Vincent Segapelo and published by . This book was released on 2004 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pyrazolyl compounds have been extensively used to prepare metal complexes, but it is only recently that they have been investigated as catalysts for the polymerization of unsaturated hydrocarbons. In catalyzing the polymerization of ethylene, the electrophilicity of the metal centre plays an important role since the key step in the polymerization is coordination of the ethylene. A similar facile coordination would be expected for acetylene and one would therefore expect pyrazolyl palladium complexes to be good catalysts for the transformation of acetylenes. This thesis was an investigation of pyrazolyl palladium complexes as catalysts for the polymerization and oligomerization of substituted acetylenes.
Download or read book Neutral Nickel and Palladium Complexes of Chelating Anionic N heterocyclic Carbenes written by Benjamin E. Ketz and published by . This book was released on 2005 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis of Polyketones from Zwitterionic Nickel Compound Catalyzed Copolymerization of Carbon Monoxide And Olefins written by Maohua Li and published by . This book was released on 2016 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transition metal catalyzed alternating copolymerization of CO and olefins is an effective method for synthesis of aliphatic polyketons. Palladium and nickel catalysts are commonly employed to catalyze the polymerization with palladium catalysts being much more active and productive than nickel catalysts. Mechanistic studies of the nickel catalysts suggest that the resting states of cationic nickel catalysts likely involve intramolecular coordination of the ketone group of the propagating polyketone to nickel. To overcome this problem, our group recently developed a class of zwitterionic nickel catalysts, which have shown extremely high activity at the beginning of the polymerization but deactivate quickly. The overall productivity of our best zwitterionic catalyst is the highest among all nickel catalysts reported in the literature but still 2 orders of magnitudes lower than that of the palladium catalyst. In my thesis, I will show the low productivity leaves of nickel catalyst in the product. The residual nickel causes a decomposition process too close to the melting temperature of the polyketone. In order to improve the processability of the polyketone, I studied the terpolymerization of CO, ethylene, and 1-hexene and accidently discovered that catalyst productivity improves in the presence of 1-hexene.
Download or read book Nickel Catalyzted Alternating Copolymerization of Carbon Monoxide and Ethylene written by Mengru Zhang and published by . This book was released on 2015 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Copolymerization of carbon monoxide and ethylene has been studied since 1940s, while the originally discovered catalyst was a nickel compound, cationic palladium (II) catalyst containing bidentate diphosphine and nitrogen ligands showed excellent activity at mild conditions. As a result, palladium catalysts became the mainstay of research in this area. In 1990s, Shell and BP started production of polyketone in full industrial using Pd-catalysts. The large scale production was then stopped at the beginning of this century for unannounced reasons, but the use of the expensive Pd as the catalyst is possibly a major problem for the commercial processes. Cationic nickel (II) complexes had much lower activity than the cationic Pd catalysts. The most efficient nickel (II) catalyst containing o-methoxyphenyl-modified P-P ligand showed moderate activity as 184 gPK/(gNi*h-1). In comparison, the commercial Pd catalysts have the activity of 6000 gPK/(gPd*h-1). Neutral nickel catalysts have been shown by other groups to have improved activities. In this work, we successfully designed and synthesized two zwitterionic nickel (II) catalysts. The highest activity can reach 8993 gPK/(gNi*h-1) and 15664 gPK/(gNi*h-1) respectively. Also, we isolated the real active intermediate, Ni-H, in the catalysis process.
Download or read book Mechanistic Investigations of the Nickel II and Palladium II Catalyzed Copolymerization of Carbon Monoxide and Olefins written by C. Scott Shultz and published by . This book was released on 2001 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Transition Metal Polymerization Catalysts written by Ray Hoff and published by John Wiley & Sons. This book was released on 2018-05-08 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: Including recent advances and historically important catalysts, this book overviews methods for developing and applying polymerization catalysts – dealing with polymerization catalysts that afford commercially acceptable high yields of polymer with respect to catalyst mass or productivity. • Contains the valuable data needed to reproduce syntheses or use the catalyst for new applications • Offers a guide to the design and synthesis of catalysts, and their applications in synthesis of polymers • Includes the information essential for choosing the appropriate reactions to maximize yield of polymer synthesized • Presents new chapters on vanadium catalysts, Ziegler catalysts, laboratory homopolymerization, and copolymerization
Download or read book Pyrazolyl Palladium Complexes with Heterocyclic Carbonyl Linkers as Catalyst Precursors for Ethylene and Phenylacetylene Polymerization written by Matshwenyego Sarah Mohlala and published by . This book was released on 2003 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure reactivity Investigations of Ethylene Polymerization and Copolymerization Using Zwitterionic Nickel and Palladium Complexes and Copolymerization of Carbon Dioxide and Epoxides Using SalenCrCl Complexes written by Cindy Ching Fang and published by . This book was released on 2003 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:
