Stereochemical Applications of NMR Studies in Rigid Bicyclic Systems

Stereochemical Applications of NMR Studies in Rigid Bicyclic Systems PDF Author: Alan P. Marchand
Publisher:
ISBN:
Category : Cyclic compounds
Languages : en
Pages : 262

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Stereochemical Applications of NMR Studies in Rigid Bicyclic Systems

Stereochemical Applications of NMR Studies in Rigid Bicyclic Systems PDF Author: Alan P. Marchand
Publisher:
ISBN:
Category : Cyclic compounds
Languages : en
Pages : 262

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Book Description


Stereochemical Applications of NMR Studies in Rigid Bicyclic Systems

Stereochemical Applications of NMR Studies in Rigid Bicyclic Systems PDF Author: Alan P. Marchand
Publisher: Wiley-VCH
ISBN:
Category : Science
Languages : en
Pages : 256

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Stereochemical Applications of NMR Studies in Rigid Bicycle Systems

Stereochemical Applications of NMR Studies in Rigid Bicycle Systems PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 231

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Stereochemical Analysis of Alicyclic Compounds by C-13 NMR Spectroscopy

Stereochemical Analysis of Alicyclic Compounds by C-13 NMR Spectroscopy PDF Author: J. A. Whitesell
Publisher: Springer Science & Business Media
ISBN: 9400931611
Category : Science
Languages : en
Pages : 213

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Book Description
Through numerous conversations with other synthetic chemists it became apparent that the great power of carbon nuclear magnetic resonance was being significantly underutilized. In our own work we have found that 13C spectroscopy is a more powerful tool than IH NMR spectroscopy, especially for probing subtle stereochemical questions in complicated systems. This is especially true in five membered ring compounds where IH NMR is at a particular disadvantage. The two techniques can be used independently to solve the same question-that of stereochemistry - but they do so in different ways. Advantage can be taken in IH NMR of a relatively consistent relationship between stereochemical orientation and coupling constants between vicinal protons, while in 13C NMR it is the correlation between spatial relationships of non-hydrogen, y substituents and their effect on chemical shift that can be used to assign stereochemistry. It was also clear that the use of 13C NMR required a different approach to problem solving than that typically used with IH NMR. While the latter technique could be employed with a very general approach (e.g., the Karplus equation), 13C NMR would, at least for the immediate future, require a relatively extensive set of model systems from which the consequences of stereochemical changes could be derived for any given carbon framework.

Stereochemical Applications of Gas-phase Electron Diffraction: Structural information for selected classes of compounds

Stereochemical Applications of Gas-phase Electron Diffraction: Structural information for selected classes of compounds PDF Author: István Hargittai
Publisher: Wiley-VCH
ISBN:
Category : Analytical chemistry
Languages : en
Pages : 560

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Stereoelectronic Effects

Stereoelectronic Effects PDF Author: Igor V. Alabugin
Publisher: John Wiley & Sons
ISBN: 1118906365
Category : Science
Languages : en
Pages : 724

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Book Description
Stereoelectronic Effects illustrates the utility of stereoelectronic concepts using structure and reactivity of organic molecules An advanced textbook that provides an up-to-date overview of the field, starting from the fundamental principles Presents a large selection of modern examples of stereoelectronic effects in organic reactivity Shows practical applications of stereoelectronic effects in asymmetric catalysis, photochemical processes, bioorganic chemistry and biochemistry, inorganic and organometallic reactivity, supramolecular chemistry and materials science

Contemporary Computer-Assisted Approaches to Molecular Structure Elucidation

Contemporary Computer-Assisted Approaches to Molecular Structure Elucidation PDF Author: Mikhail E Elyashberg
Publisher: Royal Society of Chemistry
ISBN: 1782625763
Category : Science
Languages : en
Pages : 505

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Book Description
Computer-Assisted Structure Elucidation (CASE) systems are a combination of software algorithms and tools to support and enable chemists and spectroscopists engaged in the process of molecular structure elucidation via the analysis of spectroscopic data. These expert systems dramatically reduce the time associated with structure elucidation and improve the reliability of the results. Contemporary Computer-Assisted Approaches to Molecular Structure Elucidation describes the principles on which these expert systems for spectroscopic structure elucidation are based and concisely explains the algorithmic concepts behind the programs. The authors use their own personal experiences in the development of the Structure Elucidator (StrucEluc) CASE software system to discuss the present state-of-the-art in computer-assisted structure elucidation. Scientists that are presently using CASE systems will be interested in the algorithms and modern approaches and for organizations that are currently using the StrucEluc platform the book is designed to help researchers understand the strategies behind CASE as well as details regarding the StrucEluc platform. For scientists that have never used CASE systems they will now have access to all necessary information to understand CASE systems for mastering this new and very effective approach to structure elucidation. The authors overall goal is writing this book is to produce the 'must read' definitive text that will represent the results of decades of work to develop computer-assisted structure elucidation software systems. CASE systems are now powerful software tools commonly outperforming and correcting human interpretations of data. This book will also provide an historical perspective of the work of the founding fathers of the technique and identify the challenges that have been overcome to produce modern CASE systems.

Nuclear Magnetic Resonance Spectroscopy

Nuclear Magnetic Resonance Spectroscopy PDF Author: Joseph B. Lambert
Publisher: John Wiley & Sons
ISBN: 1119295270
Category : Science
Languages : en
Pages : 482

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Book Description
Combines clear and concise discussions of key NMR concepts with succinct and illustrative examples Designed to cover a full course in Nuclear Magnetic Resonance (NMR) Spectroscopy, this text offers complete coverage of classic (one-dimensional) NMR as well as up-to-date coverage of two-dimensional NMR and other modern methods. It contains practical advice, theory, illustrated applications, and classroom-tested problems; looks at such important ideas as relaxation, NOEs, phase cycling, and processing parameters; and provides brief, yet fully comprehensible, examples. It also uniquely lists all of the general parameters for many experiments including mixing times, number of scans, relaxation times, and more. Nuclear Magnetic Resonance Spectroscopy: An Introduction to Principles, Applications, and Experimental Methods, 2nd Edition begins by introducing readers to NMR spectroscopy - an analytical technique used in modern chemistry, biochemistry, and biology that allows identification and characterization of organic, and some inorganic, compounds. It offers chapters covering: Experimental Methods; The Chemical Shift; The Coupling Constant; Further Topics in One-Dimensional NMR Spectroscopy; Two-Dimensional NMR Spectroscopy; Advanced Experimental Methods; and Structural Elucidation. Features classical analysis of chemical shifts and coupling constants for both protons and other nuclei, as well as modern multi‐pulse and multi-dimensional methods Contains experimental procedures and practical advice relative to the execution of NMR experiments Includes a chapter-long, worked-out problem that illustrates the application of nearly all current methods Offers appendices containing the theoretical basis of NMR, including the most modern approach that uses product operators and coherence-level diagrams By offering a balance between volumes aimed at NMR specialists and the structure-determination-only books that focus on synthetic organic chemists, Nuclear Magnetic Resonance Spectroscopy: An Introduction to Principles, Applications, and Experimental Methods, 2nd Edition is an excellent text for students and post-graduate students working in analytical and bio-sciences, as well as scientists who use NMR spectroscopy as a primary tool in their work.

Revue roumaine de chimie

Revue roumaine de chimie PDF Author:
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 694

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Nuclear Magnetic Resonance

Nuclear Magnetic Resonance PDF Author: G A Webb
Publisher: Royal Society of Chemistry
ISBN: 1847553702
Category : Science
Languages : en
Pages : 436

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Book Description
As a spectroscopic method, Nuclear Magnetic Resonance (NMR) has seen spectacular growth over the past two decades, both as a technique and in its applications. Today the applications of NMR span a wide range of scientific disciplines, from physics to biology to medicine. Each volume of Nuclear Magnetic Resonance comprises a combination of annual and biennial reports which together provide comprehensive of the literature on this topic. This Specialist Periodical Report reflects the growing volume of published work involving NMR techniques and applications, in particular NMR of natural macromolecules which is covered in two reports: "NMR of Proteins and Acids" and "NMR of Carbohydrates, Lipids and Membranes". For those wanting to become rapidly acquainted with specific areas of NMR, this title provides unrivalled scope of coverage. Seasoned practitioners of NMR will find this an in valuable source of current methods and applications. Specialist Periodical Reports provide systematic and detailed review coverage in major areas of chemical research. Compiled by teams of leading authorities in the relevant subject areas, the series creates a unique service for the active research chemist, with regular, in-depth accounts of progress in particular fields of chemistry. Subject coverage within different volumes of a given title is similar and publication is on an annual or biennial basis.