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Structure Elucidation In Organic Chemistry

Author: Maria-Magdalena Cid
Publisher: John Wiley & Sons
ISBN: 3527664637
Size: 79.78 MB
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Intended for advanced readers, this is a review of all relevant techniques for structure analysis in one handy volume. As such, it provides the latest knowledge on spectroscopic and related techniques for chemical structure analysis, such as NMR, optical spectroscopy, mass spectrometry and X-ray crystallography, including the scope and limitation of each method. As a result, readers not only become acquainted with the techniques, but also the advantages of the synergy between them. This enables them to choose the correct analytical method for each problem, saving both time and resources. Special emphasis is placed on NMR and its application to absolute configuration determination and the analysis of molecular interactions. Adopting a practical point of view, the author team from academia and industry guarantees both solid methodology and applications essential for structure determination, equipping experts as well as newcomers with the tools to solve any structural problem.

Modern Nmr Approaches To The Structure Elucidation Of Natural Products

Author: Antony Williams
Publisher: Royal Society of Chemistry
ISBN: 1849734682
Size: 26.25 MB
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The Ghanian plant Cryptolepis sanguinolenta is the source of a series of fascinating indoloquinoline alkaloids. The most unusual member of this alkaloid series was initially proposed to be a spiro nonacyclic structure, named cryptospirolepine, and was elucidated in 1993 based on the technologies available at that time. There were, however, several annoying attributes to the structure that bothered analysts for the ensuing 22 years. During the two decades that followed the initial work there have been enormous developments in NMR technology. Using new experimental approaches, specifically homodecoupled 1,1- and 1,n-HD-ADEQUATE NMR experiments developed in 2014, the structure of only a 700 μg sample of cryptospirolepine has been revised and is shown on the cover of this volume. The confluence of the NMR technological and methodological advances that allowed the revision of the structure of cryptospirolepine using a submilligram sample seems a fitting example for this book, which is dedicated to the NMR characterization of various classes of natural products. Volume 2 considers data processing and algorithmic based analyses tailored to natural product structure elucidation and reviews the application of NMR to the analysis of a series of different natural product families including marine natural products, terpenes, steroids, alkaloids and carbohydrates. Volume 1 discusses contemporary NMR approaches including optimized and future hardware and experimental approaches to obtain both the highest quality and most appropriate spectral data for analysis. These books, bringing together acknowledged experts, uniquely focus on the combination of experimental approaches and modern hardware and software applied to the structure elucidation of natural products. The volumes will be an essential resource for NMR spectroscopists, natural product chemists and industrial researchers working on natural product analysis or the characterization of impurities and degradation products of pharmaceuticals that can be as scarce as natural product samples.

Essential Practical Nmr For Organic Chemistry

Author: S. A. Richards
Publisher: John Wiley & Sons
ISBN: 0470977221
Size: 71.50 MB
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This book describes the use of NMR spectroscopy for dealing with problems of small organic molecule structural elucidation. It features a significant amount of vital chemical shift and coupling information but more importantly, it presents sound principles for the selection of the techniques relevant to the solving of particular types of problem, whilst stressing the importance of extracting the maximum available information from the simple 1-D proton experiment and of using this to plan subsequent experiments. Proton NMR is covered in detail, with a description of the fundamentals of the technique, the instrumentation and the data that it provides before going on to discuss optimal solvent selection and sample preparation. This is followed by a detailed study of each of the important classes of protons, breaking the spectrum up into regions (exchangeables, aromatics, heterocyclics, alkenes etc.). This is followed by consideration of the phenomena that we know can leave chemists struggling; chiral centres, restricted rotation, anisotropy, accidental equivalence, non-first-order spectra etc. Having explained the potential pitfalls that await the unwary, the book then goes on to devote chapters to the chemical techniques and the most useful instrumental ones that can be employed to combat them. A discussion is then presented on carbon-13 NMR, detailing its pros and cons and showing how it can be used in conjunction with proton NMR via the pivotal 2-D techniques (HSQC and HMBC) to yield vital structural information. Some of the more specialist techniques available are then discussed, i.e. flow NMR, solvent suppression, Magic Angle Spinning, etc. Other important nuclei are then discussed and useful data supplied. This is followed by a discussion of the neglected use of NMR as a tool for quantification and new techniques for this explained. The book then considers the safety aspects of NMR spectroscopy, reviewing NMR software for spectral prediction and data handling and concludes with a set of worked Q&As.

Organische Chemie

Author: Kurt Peter C. Vollhardt
Publisher: John Wiley & Sons
ISBN: 3527327541
Size: 38.83 MB
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Besser Konzepte und Ideen der organischen Chemie verstehen, als eine Vielzahl von Fakten auswendig beherrschen! Diesem Motto bleibt der "Vollhardt/Schore" auch in der neuesten Auflage treu. Das neu gestaltete Layout, beispielhaft gelöste Übungsaufgaben und die deutlich erweiterten Verständnisübungen führen einprägsam an die Methodik zur Lösung organisch-chemischer Probleme heran. So werden nicht nur die stofflichen Grundlagen der organischen Chemie, sondern auch das "Gewusst wie" fast schon spielerisch vermittelt. Nicht nur für Chemiestudenten, auch für Biochemiker, Pharmazeuten, Biologen und Mediziner ist der "Vollhardt/Schore" der fachliche Grundstock für die organische Chemie.

High Resolution Nmr Techniques In Organic Chemistry

Author: Timothy D. W. Claridge
Publisher: Elsevier
ISBN: 9780080427997
Size: 37.65 MB
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From the initial observation of proton magnetic resonance in water and in paraffin, the discipline of nuclear magnetic resonance has seen unparalleled growth as an analytical method. Modern NMR spectroscopy is a highly developed, yet still evolving, subject which finds application in chemistry, biology, medicine, materials science and geology. In this book, emphasis is on the more recently developed methods of solution-state NMR applicable to chemical research, which are chosen for their wide applicability and robustness. These have, in many cases, already become established techniques in NMR laboratories, in both academic and industrial establishments. A considerable amount of information and guidance is given on the implementation and execution of the techniques described in this book.

High Resolution Nmr Techniques In Organic Chemistry

Author: Timothy D.W. Claridge
Publisher: Newnes
ISBN: 0080915035
Size: 35.98 MB
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This book describes the most important high-resolution NMR techniques that find use in the structure elucidation of organic molecules and the investigation of their behavior in solution. The techniques are presented and explained using pictorial formats wherever possible, limiting the number of mathematical descriptions. The emphasis is on the more recently developed methods of solution-state NMR spectroscopy with a considerable amount of information on implementation and on the setting of critical parameters for anyone wishing to exploit these methods. * Presents a large number of examples to demonstrate the utility of the methods covered * Serves the needs of students and professionals in every chemistry laboratory * Describes the most important methods available, with guidance on execution of experiments

Organische Chemie

Author: Jonathan Clayden
Publisher: Springer Spektrum
ISBN: 9783642347153
Size: 50.62 MB
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Ein neuer Stern am Lehrbuch-Himmel: Organische Chemie von Clayden, Greeves, Warren - der ideale Begleiter für alle Chemiestudenten. Der Schwerpunkt dieses didaktisch durchdachten, umfassenden vierfarbigen Lehrbuches liegt auf dem Verständnis von Mechanismen, Strukturen und Prozessen, nicht auf dem Lernen von Fakten. Organische Chemie entpuppt sich als dabei als ein kohärentes Ganzes, mit zahlreichen logischen Verbindungen und Konsequenzen sowie einer grundlegenden Struktur und Sprache. Dank der Betonung von Reaktionsmechanismen, Orbitalen und Stereochemie gewinnen die Studierenden ein solides Verständnis der wichtigsten Faktoren, die für alle organisch-chemischen Reaktionen gelten. So lernen sie, auch Reaktionen, die ihnen bisher unbekannt waren, zu interpretieren und ihren Ablauf vorherzusagen. Der direkte, persönliche, studentenfreundliche Schreibstil motiviert die Leser, mehr erfahren zu wollen. Umfangreiche Online-Materialien führen das Lernen über das gedruckte Buch hinaus und vertiefen das Verständnis noch weiter.

Strukturanalytik Organischer Und Anorganischer Verbindungen

Author: Manfred Reichenbächer
Publisher: Springer-Verlag
ISBN: 3835192043
Size: 68.23 MB
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Eine praxisnahe und systematische Einführung in die Strukturanalytik mittels spektroskopischer Methoden. Anhand von vielen Übungsaufgaben mit ausführlichen Lösungswegen wird dem Studierenden der Einsatz spektroskopischer Methoden klar und verständlich vermittelt.