Carbon 13 Nmr
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| Author | : P.K. Agrawal |
| Publisher | : Elsevier |
| Total Pages | : 581 |
| Release | : 2013-10-22 |
| Genre | : Science |
| ISBN | : 1483290743 |
Download Carbon-13 NMR of Flavonoids Book in PDF, Epub and Kindle
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 | : Jeffrey B. Harborne |
| Publisher | : Springer |
| Total Pages | : 1218 |
| Release | : 2013-11-11 |
| Genre | : Science |
| ISBN | : 1489929096 |
Download The Flavonoids Book in PDF, Epub and Kindle
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 | : Kalevi Pihlaja |
| Publisher | : VCH Publishers |
| Total Pages | : 408 |
| Release | : 1994 |
| Genre | : Science |
| ISBN | : |
Download Carbon-13 NMR Chemical Shifts in Structural and Stereochemical Analysis Book in PDF, Epub and Kindle
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 | : Norbert W. Lutz |
| Publisher | : Cambridge University Press |
| Total Pages | : 641 |
| Release | : 2013-01-21 |
| Genre | : Medical |
| ISBN | : 0521765900 |
Download Methodologies for Metabolomics Book in PDF, Epub and Kindle
Metabolomics, the global characterisation of the small molecule complement involved in metabolism, has evolved into a powerful suite of approaches for understanding the global physiological and pathological processes occurring in biological organisms. The diversity of metabolites, the wide range of metabolic pathways and their divergent biological contexts require a range of methodological strategies and techniques. Methodologies for Metabolomics provides a comprehensive description of the newest methodological approaches in metabolomic research. The most important technologies used to identify and quantify metabolites, including nuclear magnetic resonance and mass spectrometry, are highlighted. The integration of these techniques with classical biological methods is also addressed. Furthermore, the book presents statistical and chemometric methods for evaluation of the resultant data. The broad spectrum of topics includes a vast variety of organisms, samples and diseases, ranging from in vivo metabolomics in humans and animals to in vitro analysis of tissue samples, cultured cells and biofluids.
| Author | : William Kemp |
| Publisher | : Free Press |
| Total Pages | : 240 |
| Release | : 1988 |
| Genre | : Nuclear magnetic resonance spectroscopy |
| ISBN | : 9780029494011 |
Download NMR in Chemistry Book in PDF, Epub and Kindle
| Author | : Eberhard Breitmaier |
| Publisher | : Wiley-VCH |
| Total Pages | : 552 |
| Release | : 1987 |
| Genre | : Science |
| ISBN | : |
Download Carbon-13 NMR Spectroscopy Book in PDF, Epub and Kindle
E. Breitmaier, W. Voelter Carbon-13 NMR Spectroscopy High-Resolution Methods and Applications in Organic Chemistry and Biochemistry Third, completely revised edition New techniques and increased use of computers have led to rapid development in 13C NMR spectroscopy with enhanced instrumental sensitivity and improved quality of the spectra. This necessitated a complete revision when the third edition of this successful monograph was prepared. The new methods described include those for multiplicity analysis and two-dimensional homo- or hetero-nuclear shift correlations. As in the second edition, the authors survey the large number of 13C NMR applications to organic molecules and natural products in a representative and systematic rather than an exhaustive way. New sections about coupling constants, organophosphorus and organometallic compounds as well as synthetic polymers have been added. The scope remains limited to high-resolution methods and molecular systems.
| Author | : Metin Balci |
| Publisher | : Elsevier |
| Total Pages | : 441 |
| Release | : 2005-01-19 |
| Genre | : Science |
| ISBN | : 0080525539 |
Download Basic 1H- and 13C-NMR Spectroscopy Book in PDF, Epub and Kindle
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 | : M. Shamma |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 302 |
| Release | : 2012-12-06 |
| Genre | : Science |
| ISBN | : 1468434322 |
Download Carbon-13 NMR Shift Assignments of Amines and Alkaloids Book in PDF, Epub and Kindle
The aim of this book is to gather under one cover most of the data presently available on the carbon-13 nuclear magnetic resonance (cmr) spectra of alkaloids. The term "alkaloids" is used here in a very broad sense to include synthetic analogues of the natural products. Simple model amines are also incorporated since these often supply the basic information required in the assignment of chemical shifts for the more complex compounds. The literature on alkaloid cmr spectroscopy has been covered through 1977, but the collec tion of compounds presented here is illustrative rather than exhaustive. The papers included in the reference list afford further information not only on the cmr assignments of the particular compounds provided here, but also incorporate data on additional related structures. Only a few dimeric indole alkaloids are included since to a large extent their cmr spectra can be corre lated directly with those of their monomeric analogues. The present volume is thus a representative empirical compendium of cmr assignments focusing upon alkaloids and model amines, and is intended to aid cmr research in heterocyclic and alkaloid chemistry. The compounds and data presented in this book are classified and organized according to structural similarity. The purpose of such a presenta tion is to demonstrate the common cmr characteristics of a given structural type, while also facilitating an empirical evaluation of the cmr spectral changes specifically reSUlting from relatively minor variations in oxidation level, substitution, or stereochemistry.
| Author | : J Stothers |
| Publisher | : Elsevier |
| Total Pages | : 575 |
| Release | : 2012-12-02 |
| Genre | : Science |
| ISBN | : 0323145507 |
Download Carbon-13 NMR Spectroscopy Book in PDF, Epub and Kindle
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 | : F. W. Wehrli |
| Publisher | : |
| Total Pages | : 504 |
| Release | : 1988-06-23 |
| Genre | : Science |
| ISBN | : |
Download Interpretation of Carbon-13 NMR Spectra Book in PDF, Epub and Kindle
This is the second edition of a very successful book which provides the conceptual and experimental basis for the interpretation of 13 C NMR spectra.
