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The Ligand Acidity Constant Method Applied To Transition Metal Hydride Complexes And Hydrogenation Catalysts
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Book Synopsis The Ligand Acidity Constant Method Applied to Transition Metal-Hydride Complexes and Hydrogenation Catalysts by : Meng Hua Sung
Download or read book The Ligand Acidity Constant Method Applied to Transition Metal-Hydride Complexes and Hydrogenation Catalysts written by Meng Hua Sung and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis primarily focusses on the expansion and application of the Ligand Acidity Constant (LAC) theory for the prediction of the acidity of metal hydride and dihydrogen complexes, particularly with respect to complexes bearing NHC ligands. Computational studies were carried out on a series of iron complexes, [FeH(CO)x(PR3)(5−x)]+ and their conjugate bases, and the data supported the additive effect of ligands on pKa and were used to determine the accuracy of computational methods. The linear correlation between the computed and measured pKa values produced a correction value that was further applied to the computational derivation of ligand acidity (AL) values for a series of neutral ligands, including PF3 and various NHC ligands in chapter 3. This chapter explored the relative AL values of NHCs to study steric and electronic trends arising from substitution at both the NHC backbone and wing-tip positions. Chapter 4 reports the use of a Ru-NCN complex as a CO2 hydrogenation catalyst. Although catalytic activity is modest, LAC theory is combined with experimental observations to elucidate a potential catalytic mechanism. EXSY NMR spectroscopy reveals interesting dynamic processes, including a "roll-over" of a ligand picolyl arm which may occur via a Perutz-Sabo- Etienne complex assisted metathesis (CAM) mechanism. Lastly, two novel protic-NHC ligands were synthesized and characterized. Metallation to Ru by redox tautomerization cleanly yielded air and moisture stable Ru-pNHC complexes. These Ru complexes were fully characterized and more work is required to further explore their potential as catalysts for ketone hydrogenation.
Book Synopsis Recent Advances in Hydride Chemistry by : Maurizio Peruzzini
Download or read book Recent Advances in Hydride Chemistry written by Maurizio Peruzzini and published by Elsevier. This book was released on 2002-01-30 with total page 577 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has been conceived to collect the most important recent advances in all areas of hydride chemistry research, including chemical reactivity, instrumental investigation, theory, and applications in the areas of catalysis, biochemistry and materials science. Many of the chapters have been written by the plenary lecturers of the EURO-Hydrides 2000 conference, but other leading scientists in this field have also been invited to contribute. The first part of the book focuses on the chemistry and catalysis of transition metal hydrides. Another block of chapters illustrates the most recent advances in the application of instrumental techniques to the study of the properties and reactivity of hydride compounds. The final part of the book illustrates the relevance of metal-hydrogen bonds in biochemistry and materials science. All of the chapters of this book have been evaluated by independent reviewers.
Book Synopsis Homogeneous Hydrogenation by : P.A. Chaloner
Download or read book Homogeneous Hydrogenation written by P.A. Chaloner and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: Homogeneous hydrogenation is one of the most thoroughly studied fields of homogeneous catalysis. The results of these studies have proved to be most important for an understanding of the underlying principles of the activation of small molecules by transition metal complexes. During the past three decades homogeneous hydrogenation has found widespread application in organic chemistry, including the production of important pharmaceuticals, especially where a sophisticated degree of selectivity is required. This volume presents a general account of the main principles and applications of homogeneous hydrogenation by transition metal complexes. Special attention is devoted to the mechanisms by which these processes occur, and the role of the recently discovered complexes of molecular hydrogen is described. Sources of hydrogen, other than H2, are also considered (transfer hydrogenation). The latest achievements in highly stereoselective hydrogenations have made possible many new applications in organic synthesis. These applications are documented by giving details of the reduction of important unsaturated substrates (alkenes, alkynes, aldehydes and ketones, nitrocompounds, etc.). Hydrogenation in biphasic and phase transfer catalyzed systems is also described. Finally, a discussion of the biochemical routes of H2 activation highlights the similarities and differences in performing hydrogenation in both natural and synthetic systems. For researchers working in the fields of homogeneous catalysis, especially in areas such as pharmaceuticals, plastics and fine chemicals.
Book Synopsis Homogeneous Hydrogenation in Organic Chemistry by : F.J. McQuillin
Download or read book Homogeneous Hydrogenation in Organic Chemistry written by F.J. McQuillin and published by Springer. This book was released on 1976 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic chemistry is constantly concerned with effecting reactions at a particular centre in a complex molecule, and if possible with a high and predictable level of stereoselectivity. In the light of much accumulated ex perience within organic chemistry it is usually possible to assess the likeli hood of alternative reaction pathways at least qualitatively. However, well based expectations can be falsified, and the experiments directed to the synthesis of vitamin B12 which led to Woodward's recognition of orbital symmetry control in organic chemistry are an instructive example. Our limi tations in this respect are very much accentuated in the case of hetero geneous reactions, which present additional problems, and except for very well studied instances, heterogeneous catalysis has remained a relatively empirical area of chemistry. Knowledge in this area has, however, been greatly improved by the development of transition metal complexes which replicate the catalytic properties of the metals, and are effective in a homo geneous reaction system. This development has advanced our understanding of catalysis by making it possible to interpret reactions in strictly molecular terms. In addition, these homogeneously active complexes are frequently more selective than their heterogeneous metallic counterparts either in discriminating between different functional centres in a molecule or in of fering better stereoselectivity. Homogeneous catalysts have now been devised for a number of organic chemical reactions, including hydrogenation, carbonylation, polymerisa tion, and isomerisation and dismutation of alkenes.
Book Synopsis Ligand Design in Metal Chemistry by : Mark Stradiotto
Download or read book Ligand Design in Metal Chemistry written by Mark Stradiotto and published by John Wiley & Sons. This book was released on 2016-09-01 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design of ancillary ligands used to modify the structural and reactivity properties of metal complexes has evolved into a rapidly expanding sub-discipline in inorganic and organometallic chemistry. Ancillary ligand design has figured directly in the discovery of new bonding motifs and stoichiometric reactivity, as well as in the development of new catalytic protocols that have had widespread positive impact on chemical synthesis on benchtop and industrial scales. Ligand Design in Metal Chemistry presents a collection of cutting-edge contributions from leaders in the field of ligand design, encompassing a broad spectrum of ancillary ligand classes and reactivity applications. Topics covered include: Key concepts in ligand design Redox non-innocent ligands Ligands for selective alkene metathesis Ligands in cross-coupling Ligand design in polymerization Ligand design in modern lanthanide chemistry Cooperative metal-ligand reactivity P,N Ligands for enantioselective hydrogenation Spiro-cyclic ligands in asymmetric catalysis This book will be a valuable reference for academic researchers and industry practitioners working in the field of ligand design, as well as those who work in the many areas in which the impact of ancillary ligand design has proven significant, for example synthetic organic chemistry, catalysis, medicinal chemistry, polymer science and materials chemistry.
Book Synopsis Transition Metal Sulphides by : Th. Weber
Download or read book Transition Metal Sulphides written by Th. Weber and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrotreating catalysis with transition metal sulphides is one of the most important areas of industrial heterogeneous catalysis. The present book deals with the chemical and catalytic aspects of transition metal sulphides, focusing on their use in hydrotreating catalysis. The book¿s 12 chapters present reviews of solid-state, coordination and organometallic chemistry, surface science and spectroscopic studies, quantum chemical calculations, catalytic studies with model and real catalysts, as well as refinery processes. A presentation of state-of-the-art background to pertinent work in the field. Can be used as an introduction to the chemical and catalytic properties of transition metal sulphides as well as an advanced level reference.
Book Synopsis Homogeneous Hydrogenation with Non-Precious Catalysts by : Johannes F. Teichert
Download or read book Homogeneous Hydrogenation with Non-Precious Catalysts written by Johannes F. Teichert and published by John Wiley & Sons. This book was released on 2020-02-03 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: A guide and comprehensive review of the most recent advances in homogeneous hydrogenation with non-precious catalysts In recent years a great deal of research has been applied to homogeneous hydrogenation with non-precious catalysis. Homogeneous Hydrogenation with Non-Precious Catalysts offers a review of the latest developments and advances in the field. In addition, the book explores the transition metal catalysis and the concept of frustrated-lewis-pair (FLP) and enzymatic processes. The editor?a noted expert on the topic?discusses the various catalysts and puts the focus on the synthetic vantage point, highlighting the functional group transformation enabled by the respective catalyst. Homogeneous Hydrogenation with Non-Precious Catalysts also presents the industrial view of the topic and includes an overview of the various catalysts by functional group transformations. This important book: -Offers a comprehensive presentation of the newest development in this emerging field -Highlights the transition metal catalysis, the frustrated-lewis-pair (FLP) concept, and enzymatic processes -Provides an industrial perspective of the topic -Includes an overview of the various catalysis by functional group transformations Written for organic chemists, researchers in synthetic chemistry, and industry professionals, Homogeneous Hydrogenation with Non-Precious Catalysts offers a comprehensive and accessible guide to the most recent advances in the field. [/COPY_WEB_CATALOG]
Book Synopsis Versatile Cooperative Ligand Effects in Group 9 Transition Metal Catalysis by :
Download or read book Versatile Cooperative Ligand Effects in Group 9 Transition Metal Catalysis written by and published by . This book was released on 2015 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pincer Compounds by : David Morales-Morales
Download or read book Pincer Compounds written by David Morales-Morales and published by Elsevier. This book was released on 2018-04-11 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pincer Compounds: Chemistry and Applications offers valuable state-of-the-art coverage highlighting highly active areas of research—from mechanistic work to synthesis and characterization. The book focuses on small molecule activation chemistry (particularly H2 and hydrogenation), earth abundant metals (such as Fe), actinides, carbene-pincers, chiral catalysis, and alternative solvent usage. The book covers the current state of the field, featuring chapters from renowned contributors, covering four continents and ranging from still-active pioneers to new names emerging as creative strong contributors to this fascinating and promising area. Over a decade since the publication of Morales-Morales and Jensen’s The Chemistry of Pincer Compounds (Elsevier 2007), research in this unique area has flourished, finding a plethora of applications in almost every single branch of chemistry—from their traditional application as very robust and active catalysts all the way to potential biological and pharmaceutical applications. Describes the chemistry and applications of this important class of organometallic and coordination compounds Includes contributions from global leaders in the field, featuring pioneers in the area as well as emerging experts conducting exciting research on pincer complexes Highlights areas of promising and active research, including small molecule activation, earth abundant metals, and actinide chemistry
Book Synopsis Carbon Dioxide Electrochemistry by : Marc Robert
Download or read book Carbon Dioxide Electrochemistry written by Marc Robert and published by Royal Society of Chemistry. This book was released on 2020-10-20 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: Homogeneous and Heterogeneous Catalysis
Book Synopsis CO2 Hydrogenation Catalysis by : Yuichiro Himeda
Download or read book CO2 Hydrogenation Catalysis written by Yuichiro Himeda and published by John Wiley & Sons. This book was released on 2021-06-28 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: A guide to the effective catalysts and latest advances in CO2 conversion in chemicals and fuels Carbon dioxide hydrogenation is one of the most promising and economic techniques to utilize CO2 emissions to produce value-added chemicals. With contributions from an international team of experts on the topic, CO2 Hydrogenation Catalysis offers a comprehensive review of the most recent developments in the catalytic hydrogenation of carbon dioxide to formic acid/formate, methanol, methane, and C2+ products. The book explores the electroreduction of carbon dioxide and contains an overview on hydrogen production from formic acid and methanol. With a practical review of the advances and challenges in future CO2 hydrogenation research, the book provides an important guide for researchers in academia and industry working in the field of catalysis, organometallic chemistry, green and sustainable chemistry, as well as energy conversion and storage. This important book: Offers a unique review of effective catalysts and the latest advances in CO2 conversion Explores how to utilize CO2 emissions to produce value-added chemicals and fuels such as methanol, olefins, gasoline, aromatics Includes the latest research in homogeneous and heterogeneous catalysis as well as electrocatalysis Highlights advances and challenges for future investigation Written for chemists, catalytic chemists, electrochemists, chemists in industry, and chemical engineers, CO2 Hydrogenation Catalysis offers a comprehensive resource to understanding how CO2 emissions can create value-added chemicals.
Book Synopsis Catalysis without Precious Metals by : R. Morris Bullock
Download or read book Catalysis without Precious Metals written by R. Morris Bullock and published by John Wiley & Sons. This book was released on 2011-08-02 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written for chemists in industry and academia, this ready reference and handbook summarizes recent progress in the development of new catalysts that do not require precious metals. The research thus presented points the way to how new catalysts may ultimately supplant the use of precious metals in some types of reactions, while highlighting the remaining challenges. An essential copanion for organic and catalytic chemists, as well as those working with/on organometallics and graduate students. From the contents: * Catalysis Involving the H' Transfer Reactions of First-Row Transition Metals * Catalytic Reduction of Dinitrogen to Ammonia by Molybdenum Complexes * Molybdenum and Tungsten Catalysts for Hydrogenation, Hydrosilylation and Hydrolysis * Iron in Catalytic Alkene and Carbonyl Hydrogenation Reactions * Olefin Oligomerizations and Polymerizations Catalyzed by Iron and Cobalt Complexes * Cobalt and Nickel Catalyzed Reactions Involving C-H and C-N Activation Reactions * Development of Molecular Electrocatalysts for H2 Oxidation and Production Based on Inexpensive Metals * Nickel-Catalyzed Reductinve Couplings and Cyclizations * Copper-Catalyzed Ligand Promoted Ullmann-Type Coupling Reactions * Copper-Catalyzed Azide-Alkyne Cycloaddition * "Frustrated Lewis Pairs": A Metal-Free Strategy for Hydrogenation Catalysis
Book Synopsis Metal Dihydrogen and σ-Bond Complexes by : Gregory J. Kubas
Download or read book Metal Dihydrogen and σ-Bond Complexes written by Gregory J. Kubas and published by Springer Science & Business Media. This book was released on 2006-04-18 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt: According to R.H. Crabtree, Metal Dihydrogen and sigma-Bond Complexes is described as `the definitive account of twentieth-century work in the area of sigma complexation'. It covers not only Kubas' discovery of dihydrogen coordination and the study of its structure and general properties but also discusses both the theoretical beliefs and experimental results of bonding and activation of dihydrogen on metal centers and the coordination and activation of C-H, B-H, X-H, and X-Y bonds, giving an overview of `one of the hottest areas in chemistry'.
Book Synopsis Hydrogen Transfer Reactions by : Gabriela Guillena
Download or read book Hydrogen Transfer Reactions written by Gabriela Guillena and published by Springer. This book was released on 2016-09-27 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Topics in Current Chemistry Collections presents critical reviews from the journal Topics in Current Chemistry organized in topical volumes. The scope of coverage is all areas of chemical science including the interfaces with related disciplines such as biology, medicine and materials science. The goal of each thematic volume is to give the non-specialist reader, whether in academia or industry, a comprehensive insight into an area where new research is emerging which is of interest to a larger scientific audience. Each review within the volume critically surveys one aspect of that topic and places it within the context of the volume as a whole. The most significant developments of the last 5 to 10 years are presented using selected examples to illustrate the principles discussed. The coverage is not intended to be an exhaustive summary of the field or include large quantities of data, but should rather be conceptual, concentrating on the methodological thinking that will allow the non-specialist reader to understand the information presented. Contributions also offer an outlook on potential future developments in the field.
Book Synopsis Some Transition Metal Hydride Complexes as Catalysts by : P. J. Knowles
Download or read book Some Transition Metal Hydride Complexes as Catalysts written by P. J. Knowles and published by . This book was released on 1970 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Reactivity of Transition Metal and Main Group Hydrogenation Catalysts by : Eliar Mosaferi
Download or read book Synthesis and Reactivity of Transition Metal and Main Group Hydrogenation Catalysts written by Eliar Mosaferi and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since its discovery by Paul Sabatier, catalytic hydrogenation of unsaturated substrates has become the single largest industrial process to date and encompasses the production of many products, such as foods, agrochemicals, pharmaceuticals, and materials. Over the last century research in the area has predominantly focused on the use of transition metals such as palladium, platinum, rhodium, and ruthenium to develop heterogeneous and homogeneous hydrogenation catalysts. The research presented herein focuses on the use of ruthenium complexes bearing electron-rich phosphorylated N-heterocyclic carbene ligands as well as the development of main-group compounds for frustrated Lewis pair catalysis. Complexes [Ru(0)LL'2(CO)] and [RuHL2(CO)][Cl], where L = N-phosphorylated N-heterocyclic carbene (NHCP), and L' = triphenylphosphine, were prepared as a mixture by treatment of RuHCl(CO)(PPh3)3 with excess NHCP carbene and separated by crystallization. The zero-valent complex [Ru(0)LL'2(CO)] was shown to undergo rapid oxidative addition to the corresponding Ru(II) species when treated with small molecules to afford complexes of the general type [RuHXLL'(CO)], where L = N-phosphorylated N-heterocyclic carbene, L = triphenylphosphine, and X = H, SiPh3, or Si(H)Ph2. The reaction of NHCP carbene with [RuCl2(p-cymene)]2 resulted in the isolation of the piano-stool half-sandwich complex [RuCl2(p-cymene)(NHCP)] as well as an unusual arene-activated species. The half-sandwich complex was treated with a halide-abstracting agent to afford the cationic compound [RuCl(p-cymene)(NHCP)]+, which was shown to rapidly undergo dihydrogen activation via an outer-sphere mechanism involving the phosphine appended to the carbene ligand. To demonstrate the utility of main-group catalysts, trityl cations of the form [(4-MeO-C6H4)xCPh3-x][BR4] were synthesized, where x = 1 and 3, and R = F, or C6F5. Treatment of equimolar solutions of [(4-MeO-C6H4)CPh2][BF4] and sterically encumbered phosphines with dihydrogen resulted in activation of dihydrogen but no catalytic activity was observed. The air- and moisture-stable [(4-MeO-C6H4)CPh2][BF4] was shown to be a potent Lewis acid catalyst in the hydrothiolation of olefins.
Book Synopsis The Organometallic Chemistry of the Transition Metals by : Robert H. Crabtree
Download or read book The Organometallic Chemistry of the Transition Metals written by Robert H. Crabtree and published by John Wiley & Sons. This book was released on 2005-06-14 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fully updated and expanded to reflect recent advances, this Fourth Edition of the classic text provides students and professional chemists with an excellent introduction to the principles and general properties of organometallic compounds, as well as including practical information on reaction mechanisms and detailed descriptions of contemporary applications.
