Download or read book Proazaphosphatrane and Bench stable Carbon based Lewis Acids in Frustrated Lewis Pair Chemistry written by Gabriel Nicholas Jun Hao Wee and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: B(C6F5)3 and P(MeNCH2CH2)3N form a classical Lewis adduct, (C6F5)3BP(MeNCH2CH2)3N. Although the adduct does not exhibit spectroscopic evidence of dissociation into its constituent Lewis acid and base, products of frustrated Lewis pair (FLP) addition reactions are observed with PhNCO, PhCH2N3, PhNSO, and CO2. Recently, a bench-stable trityl cation and P(MeNCH2CH2)3N were also found to form a classical Lewis adduct that does not exhibit spectroscopic evidence of dissociation. This adduct was able to carry out the heterolytic splitting of H2. Interestingly, when this and other newly synthesized bench-stable trityl cations were combined with phosphine bases such as P(t-Bu)3 and P(o-tol)3, FLPs capable of heterolytic splitting of H2 were generated and, in at least one case, reversible activation of H2 was observed. These recent findings open avenues towards the application of bench-stable carbon-based Lewis acids for FLP mediated hydrogenation.
Download or read book Frustrated Lewis Pairs I written by Gerhard Erker and published by Springer. This book was released on 2014-07-08 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discovery of Frustrated Lewis Pairs: Intermolecular FLPs for Activation of Small Molecules, by Douglas W. Stephan Intramolecular Frustrated Lewis Pairs: Formation and Chemical Features, by Gerald Kehr, Sina Schwendemann, Gerhard Erker Frustrated Lewis Pair Mediated Hydrogenations, by Douglas W. Stephan, Gerhard Erker Amine-Borane Mediated Metal-Free Hydrogen Activation and Catalytic Hydrogenation, by Victor Sumerin, Konstantin Chernichenko, Felix Schulz, Markku Leskelä, Bernhard Rieger, Timo Repo Hydrogen Activation by Frustrated Lewis Pairs: Insights from Computational Studies, by Tibor András Rokob, Imre Pápai Quantum Chemistry of FLPs and Their Activation of Small Molecules: Methodological Aspects, by Birgitta Schirmer, Stefan Grimme Computational Design of Metal-Free Molecules for Activation of Small Molecules, Hydrogenation, and Hydroamination, by Zhi-Xiang Wang, Lili Zhao, Gang Lu, Haixia Li, Fang Huang Computational Studies of Lewis Acidity and Basicity in Frustrated Lewis Pairs, by Thomas M. Gilbert Solid-State NMR as a Spectroscopic Tool for Characterizing Phosphane - Borane Frustrated Lewis Pairs, by Thomas Wiegand, Hellmut Eckert, Stefan Grimme
Download or read book Frustrated Lewis Pairs II written by Gerhard Erker and published by Springer. This book was released on 2013-12-12 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: Frustrated Lewis Pairs: From Dihydrogen Activation to Asymmetric Catalysis, by Dianjun Chen, Jürgen Klankermayer Coexistence of Lewis Acid and Base Functions: A Generalized View of the Frustrated Lewis Pair Concept with Novel Implications for Reactivity, by Heinz Berke, Yanfeng Jiang, Xianghua Yang, Chunfang Jiang, Subrata Chakraborty, Anne Landwehr New Organoboranes in "Frustrated Lewis Pair" Chemistry, by Zhenpin Lu, Hongyan Ye, Huadong Wang Paracyclophane Derivatives in Frustrated Lewis Pair Chemistry, by Lutz Greb, Jan Paradies Novel Al-Based FLP Systems, by Werner Uhl, Ernst-Ulrich Würthwein N-Heterocyclic Carbenes in FLP Chemistry, by Eugene L. Kolychev, Eileen Theuergarten, Matthias Tamm Carbon-Based Frustrated Lewis Pairs, by Shabana Khan, Manuel Alcarazo Selective C-H Activations Using Frustrated Lewis Pairs. Applications in Organic Synthesis, by Paul Knochel, Konstantin Karaghiosoff, Sophia Manolikakes FLP-Mediated Activations and Reductions of CO2 and CO, by Andrew E. Ashley, Dermot O’Hare Radical Frustrated Lewis Pairs, by Timothy H. Warren and Gerhard Erker Polymerization by Classical and Frustrated Lewis Pairs, by Eugene Y.-X. Chen Frustrated Lewis Pairs Beyond the Main Group: Transition Metal-Containing Systems, by D. Wass Reactions of Phosphine-Boranes and Related Frustrated Lewis Pairs with Transition Metal Complexes, by Abderrahmane Amgoune, Ghenwa Bouhadir, Didier Bourissou
Download or read book The Activation of Small Molecules Employing Main Group and Transition Metal Frustrated Lewis Pairs written by Rebecca Claire Neu and published by . This book was released on 2012 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis of Boron Silicon and Phosphorus Lewis Acids and Frustrated Lewis Pair Complexes for C written by Ian Robert Faulkner Mallov and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The recent proliferation of main group catalysts and stoichiometric reagents useful in effecting transformations of organic molecules has been augmented by development of the chemistry of frustrated Lewis pairs (FLPs). In seeking to both complement and emulate the reactivity of transition metal catalysts, both the synthesis of new Lewis acids and FLPs and the discovery of new reactivity with organic substrates has been explored. Boron Lewis acids such as B(C6F5)3 and electrophilic borenium cations are among the most commonly employed main group catalysts, particularly for the hydrogenation of unsaturated bonds. The first chapter of this thesis details explorations in modulating the Lewis acidity of neutral and cationic boron electrophiles by tuning phosphinimine and phosphine-amine ligands. A family of compounds featuring a P-N-B motif are presented. In seeking to broaden the range of main group catalysts, phosphorus Lewis acids have been explored. The third and fourth chapters presented herein detail the synthesis and catalytic activity of electrophilic phosphonium cations (EPCs). Synthesis of a chloride-substituted dication, and ferrocenyl-based mono- and dications are described, with a particular emphasis on their catalytic activity in the deoxygenation of ketones. The fifth chapter details the synthesis of phosphorus cations which attempt to model intermediates in EPC-mediated catalysis. Silylium cations are strongly fluorophilic and have previously been shown to cleave aliphatic C-F bonds. The final chapter presents examples of silylium cations in combination with weak phosphine Lewis bases for the selective cleavage of one C-F bond of an aryl-CF3 functionality. The FLP-captured PhCF2 is then converted to PhCF2H, completing a formal hydrodefluorination process of PhCF3 to PhCF2H. Analogous reactivity is observed with aryl-CF2 compounds.
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.
Download or read book Superbases for Organic Synthesis written by Tsutomu Ishikawa and published by John Wiley & Sons. This book was released on 2009-01-26 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Guanidines, amidines and phosphazenes have been attracting attention in organic synthesis due to their potential functionality resulting from their extremely strong basicity. They are also promising catalysts because of their potential for easy molecular modification, possible recyclability, and reduced or zero toxicity. Importantly, these molecules can be derived as natural products – valuable as scientists move towards “sustainable chemistry”, where reagents and catalysts are derived from biomaterial sources. Superbases for Organic Synthesis is an essential guide to these important molecules for preparative organic synthesis. Topics covered include the following aspects: an introduction to organosuperbases physicochemical properties of organic superbases amidines and guanidines in organic synthesis phosphazene: preparation, reaction and catalytic role polymer-supported organosuperbases application of organosuperbases to total synthesis related organocatalysts: proton sponges and urea derivatives amidines and guanidines in natural products and medicines Superbases for Organic Synthesis is a comprehensive, authoritative and up-to-date guide to these important reagents for organic chemists, drug discovery researchers and those interested in the chemistry of natural products.
Download or read book Synthetic Inorganic Chemistry written by Ewan J. M. Hamilton and published by Elsevier. This book was released on 2021-04-17 with total page 525 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthetic Inorganic Chemistry: New Perspectives presents summaries of the work of some of the most creative researchers in the field. The book highlights the most novel approaches and burgeoning applications of synthetic inorganic chemistry in development. Topics include non-precious metals in catalysis, smart inorganic polymers, new inorganic therapeutics, new photocatalysts for hydrogen production, and more. As the first volume in the Developments in Inorganic Chemistry series, this work is a valuable resource for students and researchers working in inorganic chemistry and material science. Illustrates the scope and vitality of modern synthetic inorganic chemistry Shows the centrality of inorganic chemistry, addressing a variety of global challenges Serves to define the current, important and expanding roles of synthetic inorganic chemistry in interdisciplinary areas such as materials science, synthetic organic chemistry, homogeneous and heterogeneous catalysis
Download or read book Sustainable Catalytic Processes written by Basudeb Saha and published by Newnes. This book was released on 2015-06-11 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of catalysts is the most sophisticated art in chemical sciences. It can be read like a story book when the critical scientific contents are presented in a chronological manner with short and simple sentences. This book will meets these criteria. To address the sustainability issues of existing chemical manufacturing processes or producing new chemicals, researchers are developing alternate catalysts to eliminate toxic chemicals use and by-products formation. Sustainable Catalytic Processes presents critical discussions of the progress of such catalytic development. This book of contemporary research results in sustainable catalysis area will benefit scientists in both industries and academia, and students to learn recent catalysts/process development. Reports the most recent developments in catalysis with a focus on environmentally friendly commercial processes, such as waste water treatment, alternate energy, etc Bridges the theory, necessary for the development of environmentally friendly processes, and their implementation through pilot plant and large scale Contains mainly laboratory scale data and encourages industrial scientists to test these processes on a pilot scale Includes work examples featuring the development of the new catalysts/processes using bio-renewable feedstock satisfactorily addressing environmental concerns Includes one chapter demonstrating real industrial examples motivating the industrial and academic researchers to pursue similar research
Download or read book Advances in Organometallic Chemistry written by Francis Gordon Albert Stone and published by . This book was released on 1973 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Loss and Grief written by Neil Thompson and published by Bloomsbury Publishing. This book was released on 2017-03-14 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited volume explores the wide range of practice situations across the human services in which issues loss and grief are likely to be important. It also extends understandings of loss and grief beyond death-related losses, encompassing new developments in the theoretical literature. Addressing the social and political dimensions of loss and grief as well as the psychological dimensions, this text brings together contributors from a variety of disciplines, professional background and countries, including such renowned figures as Dame Cicely Saunders and Robert A.Neimeyer.
Download or read book Amino Acid Derivatives written by G. C. Barrett and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a laboratory guide that covers the early stages of syntheses. It offers guidance to the preparation of amino acid derivatives to be used in these broad area of synthesis as well as in amino acid analysis.
