Download or read book Copolymerization and Co oligomerization of Cyclic Olefins and Carbon Monoxide with Palladium Catalysts written by Esther Mathilde Amevor-Stiefel and published by . This book was released on 1995 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catalytic Synthesis of Alkene Carbon Monoxide Copolymers and Cooligomers written by Ayusman Sen and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: 217 2. COPOLYMERIZATION OF PROPENE OR HIGHER I-ALKENES WITH 218 CARBON MONOXIDE 2. 1. Ligands and polymerization conditions 218 2. 2. Spiroketal formation 221 2. 3. Enantioselectivity 222 2. 4. Higher I-Alkenes 226 3. COPOLYMERIZATION OF STYRENE OR ITS DERIVATIVES WITH 226 CARBON MONOXIDE 4. COPOLYMERIZATION OF OTHER OLEANS WITH CARBON MONOXIDE 230 5. ASYMMETRIC TERPOLYMERIZATION OF MORE THAN Two KINDS OF 232 OLEFINS WITH CARBON MONOXIDE 6. POLYKETONE CONFORMATION 233 7. CONCLUSION 234 Chapter 8. Chain Propagation Mechanisms 237 Ayusman Sen 1. INTRODUCTION 237 2. PALLADIUM (II) BASED SYSTEMS 238 3. NICKEL (II) BASED SYSTEMS 256 4. RHODIUM (I) BASED SYSTEMS 257 5. CONCLUSION 261 Chapter 9. Theoretical Studies on Copolymerization of Polar Monomers 265 Peter Margl, Artur Michalak, and Tom Ziegler 1. INTRODUCTION 265 2. COPOLYMERIZATION OF CARBON MONOXIDE WITH ETHYLENE 267 2. 1. Experimental and calculated rates for the insertion processes for 267 copolymerization catalysed by Pd(II) systems. 2. 2. A more detailed look at the productive and unproductive cycles 270 in copolymerization catalysed by Pd(II) complexes. 2. 2. 1. The productive cycle 270 2. 2. 2. C2H4 misinsertion into an ethylene terminated polyketone 275 chain 2. 3. Experimental and calculated rates for the insertion processes for 277 alternating copolymerization catalyzed by Ni(II) systems 3. COPOLYMERIZATION OF OLEFINS WITH POLAR MONOMERS OTHER 280 THAN CO 3. 1. Preferred binding mode of oxygen containing monomers 282 3. 2. Preferred binding mode of nitrogen containing monomers 285 3. 3.
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 Mechanistic Studies of the Copolymerization of Olefins and Carbon Monoxide by Bidentate Phosphine Pd II Catalysts written by John S. Ledford and published by . This book was released on 1998 with total page 344 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 Olefin Polymerization written by Walter Kaminsky and published by Wiley-VCH. This book was released on 2006-08-18 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: With an enormous velocity, olefin polymerization has expanded to one of the most significant fields in polymers since the first industrial use about 50 years ago. In 2005, 100 million tons of polyolefins were produced - the biggest part was catalyzed by metallorganic compounds. The Hamburg Macromolecular Symposium 2005 with the title "Olefin Polymerization" involved topics such as new catalysts and cocatalysts, kinetics, mechanism and polymer reaction engineering, synthesis of special polymers, and characterization of polyolefins. The conference combined scientists from different disciplines to discuss latest research results of polymers and to offer each other the possibility of cooperation. This is reflected in this volume, which contains invited lectures and selected posters presented at the symposium.
Download or read book Organometallic Reactions and Polymerization written by Kohtaro Osakada and published by Springer. This book was released on 2014-07-15 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt: This compilation provides advanced graduate students and researchers with a structured overview of olefin polymerization. Divided into eight chapters written by international experts, this book covers polymerization using various organotransition-metal catalysts, including early and late transition metal complexes, new trends in olefin oligomerization and related reactions. All authors address the historic and scientific backgrounds of the field as well as current research progress and potential for further research. The complete book is designed to present eight independent lectures and, because all authors are well versed in organometallic chemistry, each is based on a profound understanding of the reactions and structures of organotransition metal complexes. This book is an ideal accompaniment for researchers taking courses in olefin polymerization and also serves as a valuable resource for teachers and lecturers of chemistry when planning and researching material for advanced lecture courses.
Download or read book Alternating Copolymerisation of Carbon Monoxide with A olefins with a Homogeneous Pd Type Catalyst written by L. Barkhuysen and published by . This book was released on 1997 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Alkene CO Copolymerization Using Palladium Catalysts for the Formation of Star Polymers written by Penny S. Jou and published by . This book was released on 1996 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Metathesis Polymerization of Olefins and Polymerization of Alkynes written by Yavuz Imamogammalu and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first NATO Advanced Study Institute on Olefin Metathesis and Polymerization Catalysts was held on September 10-22, 1989 in Akcay, Turkey. Based on the fundamental research of RRSchrock, RGrubbs and K.B.Wagener in the field of ring opening metathesis polymerization (ROMP), acyclic diene metathesis (ADMET) and alkyne polymerization, these areas gained growing interest within the last years. Therefore the second NATO-ASI held on metathesis reactions was on Ring Opening Metathesis Po lymerization of Olefins and Polymerization of Alkynes on September 3-16, 1995 in Akcay, Turkey. The course joined inorganic, organic and polymer chemists to exchange their knowledge in this field. This volume contains the main and short lectures held in Akcay. To include ADMET reactions better into the title of this volume we changed it into: Metathesis Polymerization of Olefins and Alkyne Polymerization. This volume is addressed to research scientists, but also to those who start to work in the area of olefin metathesis and alkyne polymerization. The topics of the course were: mechanism of ROMP reactions/ new catalysts for ROMP/ new products by ROMP/ new catalysts for ADMET/ new products by ADMETI degradation of polymer by metathesis reactions/ alkyne polymerization and metathesis/ industrial application of metathesis reactions. The Advanced Study Institute was generously sponsored by the Scientific Affairs Division of NATO and the editor gratefully acknowledges this sponsorship. We also thank the Members of the Local Organizing Committee for their engagement on a successful NATO-AS!.
Download or read book Olefin Metathesis and Polymerization Catalysts written by Yavuz Imamogammalu and published by Springer Science & Business Media. This book was released on 1990-11-30 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the NATO Advanced Study Institute, Akçay, Turkey, September 10-22, 1989
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 Stereospecific Copolymerisation of Cyclic and Acyclic Olefins with CO in the Presence of Palladium based Catalytic Systems written by Silvia Di Benedetto and published by . This book was released on 1997 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Emulsion Copolymerization of Alpha olefins with Carbon Monoxide Using Water soluble Palladium II Complexes written by Mahmoud Shaker Ahmed Sunjuk and published by . This book was released on 2003 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Substantially Isotactic Linear Alternating Copolymers of Carbon Monoxide and an Olefin written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The compound, [Pd(Me-DUPHOS)(MeCN).sub. 2](BF.sub. 4).sub. 2, [Me-DUPHOS: 1,2-bis(2,5-dimethylphospholano)benzene] is an effective catalyst for the highly enantioselective, alternating copolymerization of olefins, such as aliphatic .alpha.-olefins, with carbon monoxide to form optically active, isotactic polymers which can serve as excellent starting materials for the synthesis of other classes of chiral polymers. For example, the complete reduction of a propylene-carbon monoxide copolymer resulted in the formation of a novel, optically active poly(1,4-alcohol). Also, the previously described catalyst is a catalyst for the novel alternating isomerization cooligomerization of 2-butene with carbon monoxide to form optically active, isotactic poly(1,5-ketone).
Download or read book Organometallic Catalysis for Controlled Olefin Polymerization and Oligomerization written by Kyung-Sun Son and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: My Ph. D. work primarily involves the synthesis of ethylene-based oligomers and ethylene-styrene copolymers using organometallic catalysis. Chapter 1 reviews selective ethylene oligomerization that produces 1-hexene and 1-octene, with particular emphasis on the chromium-based catalytic systems and the mechanism by which they operate. Its application to the preparation of value-added chemicals is also covered. Chapter 2 and Chapter 3 present investigations on selective ethylene oligomerization with a Cr(PNP)Cl3/MAO catalyst system (PNP = Ph2PN(iPr)PPh2) in the presence of dialkyl zinc as an effective strategy for the co-generation of 1-octene and functionalized ethylene oligomers. Transmetallation with ZnMe2 during Cr-catalyzed ethylene tetramerization generated end-labeled 1-alkenes in Cn> 10 along with 1-octene, while that with ZnEt2 or ZnBu2 produced a mixture of end-labeled linear alkanes and 1-alkenes in Cn> 10 as well as 1-octene. Labeling studies with D2O provided a mechanistic test for metallacycle intermediates. Mechanistic proposals are presented to explain the formation of end-labeled products in the presence of various types of zinc alkyls. Chapter 4 and Chapter 5 examine a series of titanocenes [CpTiCl3, CpTiCl2TEMPO, CpNTiCl3, CpNTiCl2TEMPO, where Cp = C5H5, CpN = C5H4CH2CH2N(CH3)2, and TEMPO = 2,2,6,6-tetramethylpiperidine-N-oxyl] for styrene homopolymerization and ethylene-styrene (ES) copolymerization at 70 °C and 120 °C to determine the influence of the pendant amine group and the hydroxylaminato ligand on comonomer incorporation and distribution. Titanocenes bearing the pendant amine ligand were active for ES copolymerization, whereas complexes lacking the pendant group afforded only mixtures of homopolymers, revealing the critical role of the pendant amine donor on the copolymerization behavior. At 120 °C, the titanocene complexes with the amine group generated high molecular weight ES copolymers along with an atactic polystyrene (aPS) byproduct. The molecular weight of the ES copolymers produced by a coordination mechanism was found to coincide with that of the aPS produced by a radical polymerization mechanism. A method to separate these two components was developed by the addition of a catalytic chain-transfer agent, cobalt tetraphenylporphyrin, successfully decreasing the molecular weight of the radically-produced aPS and offering expedient separation of the ES copolymer from the aPS. Chapter 6 describes a series of new mono-, bi-, and trimetallic complexes based on the dinucleating ligand, N, N'-bis[2-(diphenylphosphino)phenyl] formamidine (PNNP), which provides two binding sites suitable for accommodating Pd, Ni, Co, Fe, and Cu. Definitive evidence for the structures of all complexes were given by X-ray crystal structures. The synthesis, characterization and crystal structure of each complex are discussed.
