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Author : Eberhard Breitmaier,Gerhard Bauer
Publisher : CRC Press
Page : 378 pages
File Size : 53,5 Mb
Release : 1984
Category : Science
ISBN : 3718604736
Author : Metin Balci
Publisher : Elsevier
Page : 430 pages
File Size : 50,5 Mb
Release : 2005-01-19
Category : Science
ISBN : 0080525539
Nuclear Magnetic Resonance (NMR) spectroscopy is a powerful and theoretically complex analytical tool. Basic 1H- and 13C-NMR Spectroscopy provides an introduction to the principles and applications of NMR spectroscopy. Whilst looking at the problems students encounter when using NMR spectroscopy, the author avoids the complicated mathematics that are applied within the field. Providing a rational description of the NMR phenomenon, this book is easy to read and is suitable for the undergraduate and graduate student in chemistry. Describes the fundamental principles of the pulse NMR experiment and 2D NMR spectra Easy to read and written with the undergraduate and graduate chemistry student in mind Provides a rational description of NMR spectroscopy without complicated mathematics
Author : Raymond John Abraham,P. Loftus
Publisher : John Wiley & Sons
Page : 252 pages
File Size : 40,8 Mb
Release : 1978
Category : Science
ISBN : UOM:39015016060975
Author : Kalevi Pihlaja,Erich Kleinpeter
Publisher : VCH Publishers
Page : 408 pages
File Size : 53,8 Mb
Release : 1994
Category : Science
ISBN : UOM:39015032148028
A review of recent research on strategies and applications of the C-13 chemical shift, a method for determining configuration of organic compounds. Introduces C-13 NMR spectroscopy, and describes conditions for collecting the FID, for data handling, and for obtaining a well- resolved C-13 NMR spectrum, as well as various substituent effect correlations, their derivations, and the origin of the effects. Also discusses the use of multidimensional NMR methods. For organic, physical, and natural products chemists. Includes bandw diagrams. Annotation copyright by Book News, Inc., Portland, OR
Author : Eberhard Breitmaier,W. Voelter
Publisher : Unknown
Page : 374 pages
File Size : 41,5 Mb
Release : 1978
Category : Carbon
ISBN : UCAL:B3028160
Author : Eberhard Breitmaier,W. Voelter
Publisher : Wiley-VCH
Page : 540 pages
File Size : 49,9 Mb
Release : 1987
Category : Science
ISBN : UCR:31210008836650
Author : J Stothers
Publisher : Elsevier
Page : 575 pages
File Size : 46,8 Mb
Release : 2012-12-02
Category : Science
ISBN : 9780323145503
Carbon-13 NMR Spectroscopy focuses on the potential of 13C techniques and the practical difficulties associated with the detection of 13C NMR absorption. This monograph includes a descriptive presentation of 13C shielding results that has been adopted with emphasis on the structural and stereochemical aspects. Organized into four parts encompassing 11 chapters, this book starts with an overview of the characteristics of the NMR signals derived from compounds containing 13C nuclei in natural abundance that are inherently much weaker than those exhibited by protons. This monograph then compares the primary characteristics of 13C NMR with the more familiar proton methods. Other chapters consider the 13C spectra of pyridine, pyridazine, pyrimidine, pyrazine, s-triazine, and s-tetrazine. The final chapter deals with the effects of solute–solvent interactions on the shieldings of other nuclei. This monograph is intended for organic chemists, graduate students, and researchers in various branches of chemistry with an interest in 13C NMR methods as another approach to chemical problems.
Author : Jeffrey B. Harborne,Helga Marby,T. J. Marby
Publisher : Springer
Page : 1218 pages
File Size : 55,9 Mb
Release : 2013-11-11
Category : Science
ISBN : 9781489929099
The flavonoids, one of the most numerous and widespread groups of natural constituents, are important to man not only because they contribute to plant colour but also because many members (e.g. coumestrol, phloridzin, rotenone) are physiologically active. Nearly two thousand substances have been described and as a group they are universally distributed among vascular plants. Although the anthocyanins have an undisputed function as plant pigments, the raison d'etre for the more widely distributed colourless flavones and flavonols still remains a mystery. It is perhaps the challenge of discovering these yet undisc10sed functions which has caused the considerable resurgence of interest in flavonoids during the last decade. This book attempts to summarize progress that has been made in the study of these constituents since the first comprehensive monograph on the chemistry of the flavonoid compounds was published, under the editorship of T. A. Geissman, in 1962. The present volume is divided into three parts. The first section (Chapters 1-4) deals with advances in chemistry, the main emphasis being on spectral techniques to take into account the re cent successful applications of NMR and mass spectral measurements to structural identifications. Recent developments in isolation techniques and in synthesis are also covered in this section. Advances in chemical knowledge of individual c1asses of flavonoid are mentioned inter aha in later chapters of the book.
Author : J. A. Whitesell
Publisher : Springer Science & Business Media
Page : 213 pages
File Size : 41,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789400931619
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.
Author : Eberhard Breitmaier,W. Voelter
Publisher : Unknown
Page : 303 pages
File Size : 50,7 Mb
Release : 1974
Category : Carbon
ISBN : LCCN:10048473
Author : George C. Levy,Robert L. Lichter,Gordon L. Nelson
Publisher : Unknown
Page : 370 pages
File Size : 46,9 Mb
Release : 1992
Category : Science
ISBN : PSU:000031188739
Author : J.W. Akitt,B. E. Mann
Publisher : CRC Press
Page : 400 pages
File Size : 47,8 Mb
Release : 2017-12-21
Category : Science
ISBN : 9781482268379
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.
Author : P.K. Agrawal
Publisher : Elsevier
Page : 581 pages
File Size : 45,8 Mb
Release : 2013-10-22
Category : Science
ISBN : 9781483290744
This detailed treatise is written for chemists who are not NMR spectroscopists but who wish to use carbon-13 NMR spectroscopy. It shows why measurement of carbon-13 NMR is needed and explains how the method can - or should - be used for rapid characterization of flavonoids, one of the most diverse and widespread groups of natural constituents. The first part of the book presents background information and discussion of the essential aspects of flavonoids and carbon-13 NMR spectroscopy and demonstrates its significant role in the revision of several earlier established chemical structures. It discusses various one- and two-dimensional NMR spectroscopic techniques and other relevant experimental methodologies for the interpretation of spectral details which enable individual resonance lines to be associated with the appropriate carbons in a molecule. The second part provides a comprehensive coverage of the carbon-13 chemical shifts of various classes and subclasses of flavonoids. It also illustrates how to utilize carbon-13 data to gain information for the determination of the nature, number and site of any substituent in flavonoids. Vital information for the differential and complete structure elucidation of the various classes of flavonoids by carbon-13 NMR shielding data is described in-depth in the third part of the book. The book will be welcomed by all those working in natural product chemistry who will appreciate the non-mathematical approach and the fact that such a wealth of theoretical and practical information has been assembled in a single volume.
Author : Nicolau Beckmann
Publisher : Elsevier
Page : 355 pages
File Size : 46,9 Mb
Release : 1995-04-06
Category : Science
ISBN : 9780080528557
This book is intended to provide an in-depth understanding of 13C NMR as a tool in biological research. 13C NMR has provided unique information concerning complex biological systems, from proteins and nucleic acids to animals and humans. The subjects addressed include multidimensional heteronuclear techniques for structural studies of molecules in the liquid and solid states, the investigation of interactions in model membranes, the elucidation of metabolic pathwaysin vitro and in vivo on animals, and noninvasive metabolic studies performed on humans. The book is a unique mix of NMR methods and biological applications which makes it a convenient reference for those interested in research in this interdisciplinary area of physics, chemistry, biology, and medicine. An interdisciplinary text with emphasis on both 13C NMR methodology and the relevant biological and biomedical issues State-of-the-art 13C NMR techniques are described; Whenever possible, their advantages over other approaches are emphasized The chapters constitute comprehensive reviews and are written by acknowledged experts in their fields Chapters are written in a clear style, and include a large number of illustrations and comprehensive references
Author : Eberhard Breitmaier,Gerhard Bauer
Publisher : Unknown
Page : 356 pages
File Size : 45,5 Mb
Release : 1984
Category : Carbon
ISBN : OCLC:312516172
