Problems in Organic Structure Determination

A Practical Approach to NMR Spectroscopy

Author: Roger G. Linington

Publisher: CRC Press

ISBN:

Category: Science

Page: 755

View: 378

At a point where most introductory organic chemistry texts end, this problems-based workbook picks up the thread to lead students through a graduated set of 120 problems. With extensive detailed spectral data, it contains a variety of problems designed by renowned authors to develop proficiency in organic structure determination. This workbook leads you from basic problems encountered in introductory organic chemistry textbooks to highly complex natural product-based problems. It presents a concept-based learning platform, introducing key concepts sequentially and reinforcing them with problems that exemplify the complexities and underlying principles that govern each concept. The book is organized in such a way that allows you to work through the problems in order or in selections according to your experience and desired area of mastery. It also provides access to raw data files online that can be downloaded and used for data manipulation using freeware or commercial software. With its problem-centered approach, integrated use of online and digital resources, and appendices that include notes and hints, Problems in Organic Structure Determination: A Practical Approach to NMR Spectroscopy is an outstanding resource for training students and professionals in structure determination.

Nuclear Magnetic Resonance Spectroscopy

An Introduction to Principles, Applications, and Experimental Methods

Author: Joseph B. Lambert

Publisher: Wiley

ISBN:

Category: Science

Page: 480

View: 490

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.

Organic Structure Analysis

Author: Phillip Crews

Publisher: Oxford University Press, USA

ISBN:

Category: Science

Page: 552

View: 225

Organic Structure Analysis is an ideal text for upper-level undergraduate and first-year graduate courses in organic spectroscopy. It provides students with the background necessary to effectively apply spectroscopic data in establishing features of molecular structure. Unique in its coverage, it is the only text that emphasizes strategies, interpretation, modern techniques, and problem solving. The text's major aim is to show how spectra can be efficiently examined in order to identify a molecule's major structural elements. Organic Structure Analysis adopts a practical approach to the subject which emphasizes building experience; the authors recognize that a combination of problem solving, access to data from models, and understanding the rules of spectral interpretation helps students to build expertise in structure determination from spectra. It outlines elements of theory, but with an emphasis on those directly relevant to spectral interpretation. The text is divided into three major sections: the first section provides extensive coverage of each of the individual methods, the second section illustrates how the strategies of organic structure analysis are actually applied in ten problems whose solutions are provided, and the third section consists of fifty unsolved problems which range from simple monofunctional compounds to complex natural products.

Organic Structure Determination Using 2-D NMR Spectroscopy

A Problem-based Approach

Author: Jeffrey H. Simpson

Publisher: Academic Press

ISBN:

Category: Science

Page: 574

View: 240

"The second edition of this book comes with a number of new figures, passages, and problems. Increasing the number of figures from 290 to 448 has necessarily added considerable length, weight, and, expense. It is my hope that the book has not lost any of its readability and accessibility. I firmly believe that most of the concepts needed to learn organic structure determination using nuclear magnetic resonance spectroscopy do not require an extensive mathematical background. It is my hope that the manner in which the material contained in this book is presented both reflects and validates this belief"--

Organic Structure Analysis

Author: Phillip Crews

Publisher: Oxford University Press, USA

ISBN:

Category: Medical

Page: 636

View: 734

The most up-to-date integrated spectroscopy text available, Organic Structure Analysis, Second Edition, is the only text that teaches students how to solve structures as they are solved in actual practice. Ideal for advanced undergraduate and graduate courses in organic structure analysis, organic structure identification, and organic spectroscopy, it emphasizes real applications--integrating theory as needed--and introduces students to the latest spectroscopic methods. An Instructor's Resource CD-ROM, which includes all of the figures from the text in electronic format and the solutions to all of the exercises and problems from the text (in an editable Word file format), is also available for adopting professors. Please contact your publisher sales representative. FEATURES * Focus on Structure: Opens with structural elements and then considers the characteristics, advantages, and disadvantages of spectroscopic methods. Includes coverage of the steps used in determining a molecular structure, the limitations to organic structure determination by spectroscopic methods, and an "Organic Structure Analyses Gone Bad" table (all unique to this text) * Practical Organization: Presents the most commonly used methods first, beginning with an overview of strategies, followed by the use of NMR, and then moving on to mass spectrometry, infrared, and ultraviolet * Innovative Real-World Problem-Solving Approach: Follows the actual information flow used by chemists to solve molecular structures, as opposed to the standard methods-based approach of other texts * Unique Chapter (12) Featuring 51 Structure-Solving Problems: Each problem emphasizes a different method; the problems increase in difficulty throughout the chapter, successively building on students' knowledge and requiring them to integrate multiple methods to identify molecules. NEW TO THE SECOND EDITION * Coverage of the Latest Instrumental and Computational Advances: Examines the use of modern instruments, data processing, and computer-assisted structure elucidation techniques * Updated and Expanded Treatment of NMR (Chapters 2-5): An extensively revised Chapter 5 discusses multi-pulse 1D and 2D NMR methods, 1D TOCSY and 1D NOESY sequences, and using NOESY and ROESY in determining relative stereochemistry and solution conformation. * Additional Coverage of Mass Spectrometry: A new chapter (7) expands the discussion of mass spectrometry to three chapters (6-8). Topics include cutting-edge MS instrumentation and new information on tandem MS techniques, combining NMR with MS, large-molecule MS, chemo-informatics, and more. * More Exercises and Improved Spectra: The second edition includes 25% more problems than the previous edition (279 total). In addition, many of the spectra, including all of those presented in Chapters 11 and 12, have been reprocessed or reacquired for greater clarity.

Solving Problems with NMR Spectroscopy

Author: Atta-ur-Rahman

Publisher: Academic Press

ISBN:

Category: Science

Page: 534

View: 453

Solving Problems with NMR Spectroscopy, Second Edition, is a fully updated and revised version of the best-selling book. This new edition still clearly presents the basic principles and applications of NMR spectroscopy with only as much math as is necessary. It shows how to solve chemical structures with NMR by giving many new, clear examples for readers to understand and try, with new solutions provided in the text. It also explains new developments and concepts in NMR spectroscopy, including sensitivity problems (hardware and software solutions) and an extension of the multidimensional coverage to 3D NMR. The book also includes a series of applications showing how NMR is used in real life to solve advanced problems beyond simple small-molecule chemical analysis. This new text enables organic chemistry students to choose the most appropriate NMR techniques to solve specific structures. The problems provided by the authors help readers understand the discussion more clearly and the solution and interpretation of spectra help readers become proficient in the application of important, modern 1D, 2D, and 3D NMR techniques to structural studies. Explains and presents the most important NMR techniques used for structural determinations Offers a unique problem-solving approach for readers to understand how to solve structure problems Uses questions and problems, including discussions of their solutions and interpretations, to help readers understand the fundamentals and applications of NMR Avoids use of extensive mathematical formulas and clearly explains how to implement NMR structure analysis Foreword by Nobel Prize winner Richard R. Ernst New to This Edition Key developments in the field of NMR spectroscopy since the First Edition in 1996 New chapter on sensitivity enhancement, a key driver of development in NMR spectroscopy New concepts such as Pulse Field Gradients, shaped pulses, and DOSY (Diffusion Order Spectroscopy) in relevant chapters More emphasis on practical aspects of NMR spectroscopy, such as the use of Shigemi tubes and various types of cryogenic probes Over 100 new problems and questions addressing the key concepts in NMR spectroscopy Improved figures and diagrams More than 180 example problems to solve, with detailed solutions provided at the end of each chapter

NMR and Chemistry

An introduction to modern NMR spectroscopy, Fourth Edition

Author: J.W. Akitt

Publisher: CRC Press

ISBN:

Category: Science

Page: 400

View: 535

Keeping mathematics to a minimum, this book introduces nuclear properties, nuclear screening, chemical shift, spin-spin coupling, and relaxation. It is one of the few books that provides the student with the physical background to NMR spectroscopy from the point of view of the whole of the periodic table rather than concentrating on the narrow applications of 1H and 13C NMR spectroscopy. Aids to structure determination, such as decoupling, the nuclear Overhauser effect, INEPT, DEPT, and special editing, and two dimensional NMR spectroscopy are discussed in detail with examples, including the complete assignment of the 1H and 13C NMR spectra of D-amygdain. The authors examine the requirements of a modern spectrometer and the effects of pulses and discuss the effects of dynamic processes as a function of temperature or pressure on NMR spectra. The book concludes with chapters on some of the applications of NMR spectroscopy to medical and non-medical imaging techniques and solid state chemistry of both I = F1/2 and I > F1/2 nuclei. Examples and problems, mainly from the recent inorganic/organometallic chemistry literature support the text throughout. Brief answers to all the problems are provided in the text with full answers at the end of the book.

The Multinuclear Approach to NMR Spectroscopy

Author: J.B. Lambert

Publisher: Springer Science & Business Media

ISBN:

Category: Mathematics

Page: 548

View: 210

The field of nuclear magnetic resonance has experienced a number of spectacular developments during the last decade. Fourier transform methodology revolutionized signal acquisition capabilities. Superconducting magnets enhanced sensitivity and produced considerable improvement in spectral dispersion. In areas of new applicat ions, the life sciences particularly bene fited from these developments and probably saw the largest increase in usage. NMR imaging promises to offer a noninvasive alternative to X rays. High resolution is now achievable with solids, through magic angle spinning and cross polarization, so that the powers of NMR are applicable to previously intractable materials such as polymers, coal, and other geochemicals. The ease of obtaining relaxation times brought an important fourth variable, after the chemical shift, the coupling constant, and the rate constant, to the examination of structural and kinetic problems i~ all fields. Software development, particularly in the area of pulse sequences, created a host of useful tech niques, including difference decoupling and difference nuclear Overhauser effect spectra, multidimensional displays, signal enhancement (INEPT), coupling constant analysis for connectivity (INADEQUATE), and observation of specific structural classes such as only quaternary carbons. Finally, hardware development gave us access to the entire Periodic Table, to the particular advan tage of the inorganic and organometallic chemist. At the NATO Advanced Study Institute at Stirling, Scotland, the participants endeavored to examine all these advances, except imaging, from a multidisciplinary point of view.

Bioactive Natural Products Detection, Isolation, and Structural Determination

Author: Steven M. Colegate

Publisher: CRC Press

ISBN:

Category: Science

Page: 544

View: 843

Bioactive Natural Products covers all the aspects of bioactive natural product research from ethnobotanical investigations to modern, technologically assisted isolation and structural determination of active compounds. An internationally selected group of experts share their knowledge of a wide range of bioactivities and chemical compound classes. Topics in the chapters describing the modern application of detection, isolation, and structural determination techniques are strongly supported by chapters detailing and reviewing research involving various classes of bioactivity. Research areas include the immunomodulatory, antiviral, cytotoxic, anti-inflammatory, and insect behavior classes of bioactivity. Extensive referencing throughout the text is helpful to those readers not familiar with this subject and serves as a critical review for more experienced researchers. The book is also excellent for upper division or post-graduate courses.

NMR Spectroscopy of the Non-Metallic Elements

Author: Stefan Berger

Publisher: Wiley

ISBN:

Category: Science

Page: 1098

View: 789

NMR Spectroscopy of the Non-Metallic Elements Stefan Berger Philipps-Universität, Marburg, Germany Siegmar Braun Technische Hochschule Darmstadt, Germany Hans-Otto Kalinowski Justus-Liebig-Universität, Gießen, Germany In recent years, the technique of Nuclear Magnetic Resonance (NMR) Spectroscopy has rapidly gained in importance outside its traditional areas of proton NMR and carbon-13 NMR. In particular, it has become much more applicable to compounds containing elements such as phosphorus, nitrogen and fluorine. NMR Spectroscopy of the Non-Metallic Elements gathers together a wealth of NMR data for the most important non-metallic elements, namely nitrogen, oxygen, fluorine, phosphorus, sulphur and xenon. For each element, the data for the simpler compounds and their derivatives (both organic and inorganic) are gathered together in as complete a form as possible, and the regularities that emerge are discussed in detail in relation to structural variations. This allows the reader to interpret the structure of more complex structures. The chapters containing the NMR data for the elements are preceded by a practical introduction to the basic theory and experimental techniques of the NMR parameters, especially the chemical shift and indirect spin-spin coupling. This material will help the reader both in finding practical solutions to problems of structure determination, and in critically evaluating the spectra obtained. NMR Spectroscopy of the Non-Metallic Elements is an invaluable reference source for all laboratories where NMR is used. It will also be widely used by organic and inorganic chemists, especially those working on nitrogen, fluorine and phosphorus compounds.