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Aromaticity Pseudoaromaticity Antiaromaticity
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Book Synopsis "Aromaticity, Pseudo-aromaticity, Anti-aromaticity" by : Ernst David Bergmann
Download or read book "Aromaticity, Pseudo-aromaticity, Anti-aromaticity" written by Ernst David Bergmann and published by Israel Academy of Sciences and Humanities. This book was released on 1971 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aromaticity and Antiaromaticity by : Miquel Solà
Download or read book Aromaticity and Antiaromaticity written by Miquel Solà and published by John Wiley & Sons. This book was released on 2022-12-19 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive review of the science of aromaticity, as well as its evolution, from benzene to atomic clusters In Aromaticity and Antiaromaticity: Concepts and Applications, a team of accomplished chemists delivers a comprehensive exploration of the evolution and critical aspects of aromaticity. The book examines the new global criteria used to evaluate aromaticity, including the Nucleus Independent Chemical Shift (NICS) index and the electronic indices based on electronic properties. Additional discussions of inorganic aromatic compounds developed in this century, which give rise to new concepts like multifold aromaticity, are included. Three-dimensional aromaticity found in fullerenes and nanotubes, Möbius aromaticity present in some annulenes, and excited state aromaticity are explored as well. This volume explores the geometrical, electronic, magnetic, and thermodynamic characteristics of aromatic and antiaromatic compounds and their reactivity properties. It also provides: A thorough historical overview of aromaticity, as well as simple electronic and structural models Comprehensive explorations of organic and inorganic aromatic compounds, concepts of stability and reactivity, and geometric, energetic, magnetic, and electronic criteria of descriptors of aromaticity Practical discussions of heteroaromaticity, as well as Möbius aromaticity and excited state aromaticity In-depth examinations of sigma, pi, delta, and phi aromaticity Perfect for graduate students, researchers, and academics interested in aromaticity, organometallic chemistry, and computational chemistry, Aromaticity and Antiaromaticity: Concepts and Applications will also earn a place in the libraries of professionals and researchers working in organic, inorganic, and physical chemistry.
Book Synopsis Aromaticity and Antiaromaticity by : Vladimir I. Minkin
Download or read book Aromaticity and Antiaromaticity written by Vladimir I. Minkin and published by Wiley-Interscience. This book was released on 1994-04-14 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designed to assist chemists in integrating the results of calculations on molecules and ions into their general body of chemical knowledge. Contains recent contributions from theoretical and computational chemistry to the development of the concept of aromaticity (antiaromaticity) and its expansion into new areas such as organometallic and cluster compounds and three-dimensional structures. Updates the modern status of aromaticity and covers basic principles and experimental applications.
Download or read book The Aromatic Sextet written by Erich Clar and published by John Wiley & Sons. This book was released on 1972 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aromaticity written by Israel Fernandez and published by Elsevier. This book was released on 2021-05-16 with total page 517 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evaluating the aromaticity of a molecular system and the influence of this concept on its properties is a crucial step in the development of novel aromatic systems. Modern computational methods can provide researchers with a high level of insight into such aromaticity, but identifying the most appropriate method for assessing a specific system can prove difficult. Aromaticity: Modern Computational Methods and Applications reviews the latest state-of-the-art computational methods in this field and discusses their applicability for evaluating the aromaticity of a system. In addition to covering aromaticity for typical organic molecules, this volume also explores systems possessing transition metals in their structures, macrocycles and even transition structures. The influence of the aromaticity on the properties of these species (including the structure, magnetic properties and reactivity) is highlighted, along with potential applications in fields including materials science and medicinal chemistry. Finally, the controversial and fuzzy nature of aromaticity as a concept is discussed, providing the basis for an updated and more comprehensive definition of this concept. Drawing on the knowledge of an international team of experts, Aromaticity: Modern Computational Methods and Applications is a unique guide for anyone researching, studying or applying principles of aromaticity in their work, from computational and organic chemists to pharmaceutical and materials scientists. - Reviews a range of computational methods to assess the aromatic nature of different compounds, helping readers select the most useful tool for the system they are studying - Presents a complete guide to the key concepts and fundamental principles of aromaticity - Provides guidance on identifying which variables should be modified to tune the properties of an aromatic system for different potential applications
Book Synopsis March's Advanced Organic Chemistry by : Michael B. Smith
Download or read book March's Advanced Organic Chemistry written by Michael B. Smith and published by John Wiley & Sons. This book was released on 2007-01-29 with total page 2379 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Sixth Edition of a classic in organic chemistry continues its tradition of excellence Now in its sixth edition, March's Advanced Organic Chemistry remains the gold standard in organic chemistry. Throughout its six editions, students and chemists from around the world have relied on it as an essential resource for planning and executing synthetic reactions. The Sixth Edition brings the text completely current with the most recent organic reactions. In addition, the references have been updated to enable readers to find the latest primary and review literature with ease. New features include: More than 25,000 references to the literature to facilitate further research Revised mechanisms, where required, that explain concepts in clear modern terms Revisions and updates to each chapter to bring them all fully up to date with the latest reactions and discoveries A revised Appendix B to facilitate correlating chapter sections with synthetic transformations
Book Synopsis Aromaticity and Metal Clusters by : Pratim Kumar Chattaraj
Download or read book Aromaticity and Metal Clusters written by Pratim Kumar Chattaraj and published by CRC Press. This book was released on 2010-10-15 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal clusters, an intermediate state between molecules and the extended solid, show peculiar bonding and reactivity patterns. Their significance is critical to many areas, including air pollution, interstellar matter, clay minerals, photography, catalysis, quantum dots, and virus crystals. In Aromaticity and Metal Clusters, dozens of international experts explore not only the basic aspects of aromaticity, but also the structures, properties, reactivity, stability, and other consequences of the aromaticity of a variety of metal clusters. Although the concept of aromaticity has been known for nearly two centuries, there is no way to measure it experimentally and no theoretical formula to calculate it. In order to gain insight into its exact nature, the authors of this volume examine various indirect characteristics such as geometrical, electronic, magnetic, thermodynamic, and reactivity considerations. The book begins by discussing the evolution of aromaticity from benzene to atomic clusters. Next, more specialized chapters focus on areas of significant interest. Topics discussed include: Computational studies on molecules with unusual aromaticity Electronic shells and magnetism in small metal clusters A density functional investigation on the structures, energetics, and properties of sodium clusters through electrostatic guidelines and molecular tailoring The correlation between electron delocalization and ring currents in all metallic aromatic compounds Phenomenological shell model and aromaticity in metal clusters Rationalizing the aromaticity indexes used to describe the aromatic behavior of metal clusters 5f orbital successive aromatic and antiaromatic zones in triangular uranium cluster chemistry This collection of diverse contributions, composed of the work of scientists worldwide, is destined to not only answer puzzling questions about the nature of aromaticity, but also to provoke further inquiry in the minds of researchers.
Book Synopsis Emerging Materials for Energy Conversion and Storage by : Kuan Yew Cheong
Download or read book Emerging Materials for Energy Conversion and Storage written by Kuan Yew Cheong and published by Elsevier. This book was released on 2018-08-09 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emerging Materials for Energy Conversion and Storage presents the state-of-art of emerging materials for energy conversion technologies (solar cells and fuel cells) and energy storage technologies (batteries, supercapacitors and hydrogen storage). The book is organized into five primary sections, each with three chapters authored by worldwide experts in the fields of materials science, physics, chemistry and engineering. It covers the fundamentals, functionalities, challenges and prospects of different classes of emerging materials, such as wide bandgap semiconductors, oxides, carbon-based nanostructures, advanced ceramics, chalcogenide nanostructures, and flexible organic electronics nanomaterials. The book is an important reference for students and researchers (from academics, but also industry) interested in understanding the properties of emerging materials. - Explores the fundamentals, challenges and prospects for the application of emerging materials in the development of energy conversion and storage devices - Presents a discussion of solar cell and photovoltaic, fuel cell, battery electrode, supercapacitor and hydrogen storage applications - Includes notable examples of energy devices based on emerging materials to illustrate recent advances in this field
Book Synopsis Basic Principles of Organic Chemistry by : John D. Roberts
Download or read book Basic Principles of Organic Chemistry written by John D. Roberts and published by . This book was released on 1977 with total page 1596 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction what is organic chemistry all about?; Structural organic chemistry the shapes of molecules functional groups; Organic nomenclature; Alkanes; Stereoisomerism of organic molecules; Bonding in organic molecules atomic-orbital models; More on nomenclature compounds other than hydrocarbons; Nucleophilic substitution and elimination reactions; Separation and purification identification of organic compounds by spectroscopic techniques; Alkenes and alkynes. Ionic and radical addition reactions; Alkenes and alkynes; Oxidation and reduction reactions; Acidity or alkynes.
Book Synopsis Cyclobutadiene and Related Compounds by : M.P. Cava
Download or read book Cyclobutadiene and Related Compounds written by M.P. Cava and published by Elsevier. This book was released on 2012-12-02 with total page 519 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cyclobutadiene and Related Compounds describes the four-membered carbocyclic compounds that have only trigonally hybridized carbon atoms in the ring. The book discusses the chemistry of cyclobutadiene and the substituted cyclobutadienes, including the preparation of cyclobutadiene-metal complexes that can be done in four ways. These are (1) by reaction of acetylenes with transition metal compounds, (2) from cyclobutenyl metal complexes, (3) by transformation of other cyclobutadiene-metal complexes, and (4) by trapping cyclobutadienes with transitional metal compounds. The text also describes cyclobutadiene dianion, the chemistry of the cyclobutadienequinones, the condensed methylenecyclobutene aromatic systems, and the higher aromatic analogs of benzocyclobutadiene. The book cites proofs of the structure of biphenylene using chemical and physical methods. The text also presents theoretical aspects of the cyclobutadiene problem including studies regarding the ?-electronic state of cyclobutadiene; the comparisons of some of these studies; the framework energies and Janh-Teller considerations; and the substituted cyclobutadienes, cyclobutadiene divalent ions, and metal complexes. This book is suitable for scientists and researchers working in the field of organic chemistry, analytical chemistry, and molecular physics.
Book Synopsis From Chemical Topology to Three-Dimensional Geometry by : Alexandru T. Balaban
Download or read book From Chemical Topology to Three-Dimensional Geometry written by Alexandru T. Balaban and published by Springer Science & Business Media. This book was released on 2006-04-11 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: Even high-speed supercomputers cannot easily convert traditional two-dimensional databases from chemical topology into the three-dimensional ones demanded by today's chemists, particularly those working in drug design. This fascinating volume resolves this problem by positing mathematical and topological models which greatly expand the capabilities of chemical graph theory. The authors examine QSAR and molecular similarity studies, the relationship between the sequence of amino acids and the less familiar secondary and tertiary protein structures, and new topological methods.
Book Synopsis Aspects of Organic Chemistry by : Gerhard Quinkert
Download or read book Aspects of Organic Chemistry written by Gerhard Quinkert and published by John Wiley & Sons. This book was released on 1996 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modeling molecular structures is a useful tool for the description, classification and understanding of molecules – species, which have already been synthesized, and others existing only in the imagination of the chemist. The first part of the four–volume series ′Aspects of Organic Chemistry′ focuses on molecular structure, especially that of nucleid acids and proteins. The authors, a team of internationally recognized specialists, present a modern interdisciplinary concept between chemistry – and biology – an approach, which proved to be useful in university education. A unique book, important for both lecturers and students. Subjects of the three remaining volumes are ′Reactivity′, ′Synthesis′ and ′Methods of Structure Elucidation′.
Book Synopsis Perspectives on Structure and Mechanism in Organic Chemistry by : Felix A. Carroll
Download or read book Perspectives on Structure and Mechanism in Organic Chemistry written by Felix A. Carroll and published by John Wiley & Sons. This book was released on 2023-04-14 with total page 869 pages. Available in PDF, EPUB and Kindle. Book excerpt: PERSPECTIVES ON STRUCTURE AND MECHANISM IN ORGANIC CHEMISTRY “Beyond the basics” physical organic chemistry textbook, written for advanced undergraduates and beginning graduate students Based on the author’s first-hand classroom experience, Perspectives on Structure and Mechanism in Organic Chemistry uses complementary conceptual models to give new perspectives on the structures and reactions of organic compounds, with the overarching goal of helping students think beyond the simple models of introductory organic chemistry courses. Through this approach, the text better prepares readers to develop new ideas in the future. In the 3rd Edition, the author thoroughly updates the topics covered and reorders the contents to introduce computational chemistry earlier and to provide a more natural flow of topics, proceeding from substitution, to elimination, to addition. About 20% of the 438 problems have been either replaced or updated, with answers available in the companion solutions manual. To remind students of the human aspect of science, the text uses the names of investigators throughout the text and references material to original (or accessible secondary or tertiary) literature as a guide for students interested in further reading. Sample topics covered in Perspectives on Structure and Mechanism in Organic Chemistry include: Fundamental concepts of organic chemistry, covering atoms and molecules, heats of formation and reaction, bonding models, and double bonds Density functional theory, quantum theory of atoms in molecules, Marcus Theory, and molecular simulations Asymmetric induction in nucleophilic additions to carbonyl compounds and dynamic effects on reaction pathways Reactive intermediates, covering reaction coordinate diagrams, radicals, carbenes, carbocations, and carbanions Methods of studying organic reactions, including applications of kinetics in studying reaction mechanisms and Arrhenius theory and transition state theory A comprehensive yet accessible reference on the subject, Perspectives on Structure and Mechanism in Organic Chemistry is an excellent learning resource for students of organic chemistry, medicine, and biochemistry. The text is ideal as a primary text for courses entitled Advanced Organic Chemistry at the upper undergraduate and graduate levels.
Book Synopsis Making 20th Century Science by : Stephen G. Brush
Download or read book Making 20th Century Science written by Stephen G. Brush and published by Oxford University Press, USA. This book was released on 2015 with total page 553 pages. Available in PDF, EPUB and Kindle. Book excerpt: Historically, the scientific method has been said to require proposing a theory, making a prediction of something not already known, testing the prediction, and giving up the theory (or substantially changing it) if it fails the test. A theory that leads to several successful predictions is more likely to be accepted than one that only explains what is already known but not understood. This process is widely treated as the conventional method of achieving scientific progress, and was used throughout the twentieth century as the standard route to discovery and experimentation. But does science really work this way? In Making 20th Century Science, Stephen G. Brush discusses this question, as it relates to the development of science throughout the last century. Answering this question requires both a philosophically and historically scientific approach, and Brush blends the two in order to take a close look at how scientific methodology has developed. Several cases from the history of modern physical and biological science are examined, including Mendeleev's Periodic Law, Kekule's structure for benzene, the light-quantum hypothesis, quantum mechanics, chromosome theory, and natural selection. In general it is found that theories are accepted for a combination of successful predictions and better explanations of old facts. Making 20th Century Science is a large-scale historical look at the implementation of the scientific method, and how scientific theories come to be accepted.
Download or read book Organic Chemistry written by and published by . This book was released on 1902 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Quantum Chemistry written by and published by Academic Press. This book was released on 2018-04-16 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Quantum Chemistry, Volume 77, presents surveys of current topics in this rapidly developing field, one that has emerged at the cross section of the historically established areas of mathematics, physics, chemistry and biology. It features detailed reviews written by leading international researchers, with this release focusing on topics such as Per-Olov Löwdin's Impact on a 'Lost Son', Electron impact ionization cross sections for inner L- and M-subshells of atomic targets at relativistic energies, Aromaticity Revisited, Electron-atom and electron-molecule resonances, Precise Born-Oppenheimer potentials of the excited states of H_2 using explicitly correlated exponential functions, and more. - Presents surveys of current topics in this rapidly-developing field that has emerged at the cross section of the historically established areas of mathematics, physics, chemistry and biology - Features detailed reviews written by leading international researchers
Book Synopsis Organophosphorus Chemistry 2018 by : György Keglevich
Download or read book Organophosphorus Chemistry 2018 written by György Keglevich and published by MDPI. This book was released on 2020-03-05 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organophosphorus chemistry is an important discipline within organic chemistry. Phosphorus compounds, such as phosphines, trialkyl phosphites, phosphine oxides (chalcogenides), phosphonates, phosphinates and >P(O)H species, etc., may be important starting materials or intermediates in syntheses. Let us mention the Wittig reaction and the related transformations, the Arbuzov- and the Pudovik reactions, the Kabachnik–Fields condensation, the Hirao reaction, the Mitsunobu reaction, etc. Other reactions, e.g., homogeneous catalytic transformations or C-C coupling reactions involve P-ligands in transition metal (Pt, Pd, etc.) complex catalysts. The synthesis of chiral organophosphorus compounds means a continuous challenge. Methods have been elaborated for the resolution of tertiary phosphine oxides and for stereoselective organophosphorus transformations. P-heterocyclic compounds, including aromatic and bridged derivatives, P-functionalized macrocycles, dendrimers and low coordinated P-fragments, are also of interest. An important segment of organophosphorus chemistry is the pool of biologically-active compounds that are searched and used as drugs, or as plant-protecting agents. The natural analogue of P-compounds may also be mentioned. Many new phosphine oxides, phosphinates, phosphonates and phosphoric esters have been described, which may find application on a broad scale. Phase transfer catalysis, ionic liquids and detergents also have connections to phosphorus chemistry. Green chemical aspects of organophosphorus chemistry (e.g., microwave-assisted syntheses, solvent-free accomplishments, optimizations, and atom-efficient syntheses) represent a dynamically developing field. Last, but not least, theoretical approaches and computational chemistry are also a strong sub-discipline within organophosphorus chemistry.
