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Author: George A. Olah
Publisher: John Wiley & Sons
ISBN:
Category : Science
Languages : en
Pages : 216
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Book Description
Author: George A. Olah
Publisher: John Wiley & Sons
ISBN:
Category : Science
Languages : en
Pages : 216
Get Book Here
Book Description
Author: George A. Olah
Publisher: John Wiley & Sons
ISBN: 9780471148777
Category : Science
Languages : en
Pages : 532
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Book Description
Der Autor George Olah, der 1995 den Nobelpreis erhielt, stellt in seinem Buch die Anwendung von Onium-Ionen als elektrophile Reagenzien und Katalysatoren dar und erläutert diese für die chemische Synthese bedeutsamen Verbindungen. (8/98)
Author: Berit Olofsson
Publisher: John Wiley & Sons
ISBN: 1119352304
Category : Science
Languages : en
Pages : 1068
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Book Description
Für das Verständnis der organischen Chemie muss man wissen, worum es sich bei funktionalen Gruppen handelt. Dieses Fachbuch steht ganz in der Tradition der Reihe Patai's Chemistry of Functional Groups. Jeder Band deckt sämtliche Aspekte funktionaler Gruppen ab und behandelt dabei theoretische, analytische, synthetische, biologische Aspekte sowie Belange der Industrie. Hypervalente Halogenverbindungen, insbesondere Jodverbindungen, sind überaus effiziente und selektive Oxidantien für eine Vielzahl funktionaler Gruppen. Die elektrophilen Eigenschaften dieser Reagenzien können auch für die Einführung anderer Funktionalisierungen verwendet werden. Dieser Band ist der erste in der Reihe, die die Eigenschaften und das chemische Verhalten von hypervalentem Jod und Brom, deren Einsatz in der organischen Synthese sowie deren industrielle Anwendung untersucht. Wie bei allen neuen Bänden, werden die Kapitel zunächst online in Patai's Chemistry of Functional Groups veröffentlicht. Wenn ein Band online vervollständigt ist, erfolgt die Herausgabe als Printversion. Die Printfassung entspricht der Qualität, die man von der Patai-Reihe kennt, und bietet auch einen umfassenden Index.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 24
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Book Description
The structures and charge densities of halonium ions, derived from addition of halogen electrophiles to fluoro-substituted terminal alkenes, were computed using quantum chemical methods. Geometry optimizations were performed at the second-order perturbation theory level (MP2, also known as MBPT(2)), using the Spartan02 program and also at the density functional theory level, using the GAMESS quantum chemistry code with the B3LYP hybrid functional. An additional set of B3LYP calculations incorporating the Polarizable Continuum Model (PCM) to probe methanol solvent effects was also performed. The halonium ions from terminal fluoroalkenes were found to be symmetrical (C), unsymmetrical (B or D), or open-ions described by A or E. These calculated data support experimental product distributions and they can predict the product regiochemistry from halonium ions opened by anions in aprotic solvents or when opened by protic solvents like methanol. Electron-withdrawing alkyl groups tend to decrease the SN1-character of the product-determining ring-opening transition state, and an SN-2-like process occurs which is more susceptible to steric effects.
Author: John L. Holmes
Publisher: CRC Press
ISBN: 0203492471
Category : Science
Languages : en
Pages : 468
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Book Description
Assigning Structures to Ions in Mass Spectrometry describes the tools currently available for determining gas-phase ion structures. It surveys current experimental methods for ion production and separation as well as those designed to reveal qualitative and quantitative aspects of gas-phase ions. It also examines how and when to apply computational chemistry and theoretical calculations. Selected case studies illustrate specific challenges associated with ion structure assignment and thermochemical problems. Bringing together key results collected over the past four decades, the book contains the data for describing or identifying ions containing C alone and C with H, O, N, S, P, halogens, and small organic cations.
Author: George A. Olah
Publisher: John Wiley & Sons
ISBN: 0470421541
Category : Science
Languages : en
Pages : 872
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Book Description
The chemistry of superacids has developed in the last two decades into a field of growing interest and importance. Now available in a new expanded second edition, this definitive work on superacids offers a comprehensive review of superacids and discusses the development of new superacid systems and applications of superacids in the promotion of unusual reactions. Covering Bronsted and Leurs superacids, solid superacids, carbocations, heterocations, and catalyzed reactions, this timely volume is invaluable to professionals, faculty, and graduate students in organic, inorganic, and physical chemistry.
Author: Pierangelo Metrangolo
Publisher: Springer
ISBN: 3319157329
Category : Science
Languages : en
Pages : 215
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Book Description
The series Topics in Current Chemistry presents critical reviews of the present and future trends in modern chemical research. 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. Review articles for the individual volumes are invited by the volume editors. Readership: research chemists at universities or in industry, graduate students.
Author: George A Olah
Publisher: World Scientific
ISBN: 9814498548
Category : Science
Languages : en
Pages : 1503
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Book Description
In the course of his distinguished career spanning about half a century, George A Olah, winner of the 1994 Nobel Prize for Chemistry, has been exceedingly prolific and has published more than 1000 scientific papers and 15 books and holds more than 100 patents. This invaluable volume contains about 250 papers selected for their breadth and current importance.
Author: Brian Capon
Publisher: Springer Science & Business Media
ISBN: 1468408267
Category : Science
Languages : en
Pages : 285
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Book Description
1. General Considerations.- 1. Introduction.- 1.1. Historical and General Description of Neighboring Group Effects.- 1.2. Terms and Definitions.- 2. Some Factors that Influence Anchimeric Assistance.- 2.1. The Stabilities of Bridged Carbocations-Some Molecular Orbital Calculations.- 2.2 Hyperconjugation-An Alternative Explanation?.- 2.3. The Effect of Intramolecularity-Ring Size and gew-Dialkyl Effects.- 2.3.1. Ring Size.- 2.3.2. The gem-Dialkyl Effect.- 3. Some Experimental Methods Used in the Study of Neighboring Group Participation.- 3.1. Kinetic Methods.- 3.1.1. Estimation of Reaction Rate.
Author: Robert W. Taft
Publisher: John Wiley & Sons
ISBN: 0470172126
Category : Science
Languages : en
Pages : 384
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Book Description
Progress in Physical Organic Chemistry is dedicated to reviewing the latest investigations into organic chemistry that use quantitative and mathematical methods. These reviews help readers understand the importance of individual discoveries and what they mean to the field as a whole. Moreover, the authors, leading experts in their fields, offer unique and thought-provoking perspectives on the current state of the science and its future directions. With so many new findings published in a broad range of journals, Progress in Physical Organic Chemistry fills the need for a central resource that presents, analyzes, and contextualizes the major advances in the field. The articles published in Progress in Physical Organic Chemistry are not only of interest to scientists working in physical organic chemistry, but also scientists working in the many subdisciplines of chemistry in which physical organic chemistry approaches are now applied, such as biochemistry, pharmaceutical chemistry, and materials and polymer science. Among the topics explored in this series are reaction mechanisms; reactive intermediates; combinatorial strategies; novel structures; spectroscopy; chemistry at interfaces; stereochemistry; conformational analysis; quantum chemical studies; structure-reactivity relationships; solvent, isotope and solid-state effects; long-lived charged, sextet or open-shell species; magnetic, non-linear optical and conducting molecules; and molecular recognition.
