Proton-responsive Pyridine-based Ligands PDF Download
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Author: Sandra Yvette Boer
Publisher:
ISBN:
Category :
Languages : en
Pages : 163
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Book Description
Catalysts are in dispensable for society as they are applied in the majority of industrial processes. Catalysts can increase the rate at which a reaction proceeds, but can also selectively produce only one product, thereby preventing side reactions and the production of side products or waste, resulting in more efficient, atom-economical and environmentally benign processes. In homogeneous catalysis, the catalyst often consists of a transition metal that is surrounded by ligands. Reactive or proton-responsive ligands may be envisioned to operate in a synergistic way with the metal to facilitate a chemical process. This concept of metal-ligand cooperation (MLC) has gained a lot of interest over the past decade and is currently a rapidly expanding field of homogeneous catalysis. The research described in this thesis is focused on the development of new metal complexes bearing different proton-responsive ligand systems. More specifically, several bidentate and tridentate types of pyridine-based ligands are described, based on phosphinomethylpyridines, pyridones and pyrazoles. They all exhibit a cooperative character in their own specific way. The coordination to mainly 2nd row late-transition metals (Ru, Rh, and Pd) is successfully demonstrated, along with the behavior of their bifunctional character. Application in several catalytic transformations is studied, including various dehydrogenative coupling reactions and the intramolecular hydroamination of aminoalkenes and -alkynes.
Author: Sandra Yvette Boer
Publisher:
ISBN:
Category :
Languages : en
Pages : 163
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Book Description
Catalysts are in dispensable for society as they are applied in the majority of industrial processes. Catalysts can increase the rate at which a reaction proceeds, but can also selectively produce only one product, thereby preventing side reactions and the production of side products or waste, resulting in more efficient, atom-economical and environmentally benign processes. In homogeneous catalysis, the catalyst often consists of a transition metal that is surrounded by ligands. Reactive or proton-responsive ligands may be envisioned to operate in a synergistic way with the metal to facilitate a chemical process. This concept of metal-ligand cooperation (MLC) has gained a lot of interest over the past decade and is currently a rapidly expanding field of homogeneous catalysis. The research described in this thesis is focused on the development of new metal complexes bearing different proton-responsive ligand systems. More specifically, several bidentate and tridentate types of pyridine-based ligands are described, based on phosphinomethylpyridines, pyridones and pyrazoles. They all exhibit a cooperative character in their own specific way. The coordination to mainly 2nd row late-transition metals (Ru, Rh, and Pd) is successfully demonstrated, along with the behavior of their bifunctional character. Application in several catalytic transformations is studied, including various dehydrogenative coupling reactions and the intramolecular hydroamination of aminoalkenes and -alkynes.
Author: John Michael Guynn
Publisher:
ISBN:
Category : Ligands
Languages : en
Pages : 150
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Book Description
Author: Satyanarayan Pal
Publisher: BoD – Books on Demand
ISBN: 1803566620
Category : Science
Languages : en
Pages : 251
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Book Description
This book discusses the chemistry and applications of pyridine derivatives. The library of pyridine derivatives is growing steadily with numerous synthetic analogues already described and the identification of new, naturally occurring pyridine-based compounds. The book includes ten chapters organized into two parts. The first part focuses on the numerous types of reactions that arise from pyridine derivatives. The second part examines the pharmaceutical applications of pyridine derivatives as well as their usefulness as sensors for metal cations and extracting agents for platinum group metals.
![Noninnocent Proton-Responsive Ligand Facilitates Reductive Deprotonation and Hinders CO2 Reduction Catalysis in [Ru(tpy)(6DHBP)(NCCH3)]2+ (6DHBP PDF](https://books.google.com/books/content/images/frontcover/SAPntwEACAAJ?fife=w80-h100)
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 13
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Book Description
Ruthenium complexes with proton-responsive ligands [Ru(tpy)(nDHBP)(NCCH3)](CF3SO3)2 (tpy = 2,2':6',2"--Terpyridine; nDHBP = n, n'-dihydroxy-2,2'-bipyridine, n = 4 or 6) were examined in this study for reductive chemistry and as catalysts for CO2 reduction. Electrochemical reduction of [Ru(tpy)(nDHBP)(NCCH3)]2+ generates deprotonated species through interligand electron transfer in which the initially formed tpy radical anion reacts with a proton source to produce singly and doubly deprotonated complexes that are identical to those obtained by base titration. A third reduction (i.e., reduction of [Ru(tpy)(nDHBP-2H+)]0) triggers catalysis of CO2 reduction; however, the catalytic efficiency is strikingly lower than that of unsubstituted [Ru(tpy)(bpy)(NCCH3)]2+ (bpy = 2,2'-bipyridine). Cyclic voltammetry, bulk electrolysis, and spectroelectrochemical infrared experiments suggest the reactivity of CO2 at both the Ru center and the deprotonated quinone-type ligand. Lastly, the Ru carbonyl formed by the intermediacy of a metallocarboxylic acid is stable against reduction, and mass spectrometry analysis of this product indicates the presence of two carbonates formed by the reaction of DHBP-2H+ with CO2.
Author: Maravanji S. Balakrishna
Publisher: Elsevier
ISBN: 0128156945
Category : Science
Languages : en
Pages : 445
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Book Description
Copper(I) Complexes of Phosphines, Functionalized Phosphines and Phosphorus Heterocycles is a comprehensive guide to one of the most widely used and extensively studied metals: copper. The numerous practical applications of copper compounds are discussed, including homogeneous and heterogeneous catalysis and their use as fungicides, pesticides, pigments for paints, resins and glasses, and in high-temperature superconductors. The remarkable structural flexibility of simple copper(I) complexes, such as cuprous halides is covered, including numerous structural motifs that, when combined with different ligand systems, exhibit linear, trigonal planar or tetrahedral geometries. This work is an essential reference for inorganic and coordination chemists, as well as researchers working on catalysis, anticancer reagents, luminescence, fluorescence and photophysical aspects. Discusses the properties of copper and similarities to noble metals, such as their corrosion resistance, high thermal and electrical conductivity and rich coordination chemistry Includes the copper(I) coordination chemistry of tertiary phosphines, bisphosphines and phosphines containing other donor atoms and their potential application in catalysis, biosystems and photochemical areas Features a discussion of the rich photochemistry exhibited by some mixed-ligand copper(I) complexes (phosphines with heteroaromatic ligands) which can exhibit coprophilic interactions, photoluminescence and thermochromic properties
Author: Yuichiro Himeda
Publisher: John Wiley & Sons
ISBN: 3527346635
Category : Technology & Engineering
Languages : en
Pages : 322
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Book Description
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.
Author: Thomas Zell
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3110536420
Category : Science
Languages : en
Pages : 392
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Book Description
Hydrogen is believed to be the energy source of the future, enabling zero-emission and efficient production of power. This comprehensive publication presents a broad spectrum of various chemical aspects of hydrogen storage. The authors also address global climate change issues, carbon dioxide sequestration problems and CO2-based hydrogen storage.
Author: Hitoshi Ishida
Publisher: BoD – Books on Demand
ISBN: 1839629169
Category : Technology & Engineering
Languages : en
Pages : 228
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Book Description
Ruthenium is a precious metal not widely known to non-scientists. It is a target of much research, however. It is used in computer hard drives, the tips of fountain pens, and as a catalyst to purify car exhaust, among other uses. This book presents information and research on the properties and applications of ruthenium, including potential uses in phytochemical functions and anticancer activity.
Author: Gabriela Guillena
Publisher: Springer
ISBN: 3319430513
Category : Science
Languages : en
Pages : 393
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Book Description
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.
Author: David Morales-Morales
Publisher: Elsevier
ISBN: 0128129328
Category : Science
Languages : en
Pages : 756
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Book Description
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
