Download or read book Nuclear Magnetic Resonance Spectral Studies of Amides written by Daniel S. Dyer and published by . This book was released on 1969 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: The temperature and solvent dependence of the nuclear magnetic resonance (nmr) spectra of a number of amides has been studied. Hindered internal rotation about the C(O)-N and aryl-nitrogen bonds was detected in a series of N-acylhydrazobenzenes. In this series of compounds, hindered rotation about the C(O)-N bond afforded, in most cases, a mixture of cis-trans isomers in solution. These isomers were easily detected by nmr spectroscopy. Thus the free energies of activation, at the coalescence temperatures, for the hindered rotations were calculated. Similar temperature dependence studies on the nmr spectra of N-phenylacetamide and N-(o-tolyl) acetamide also afforded evidence for hindered internal rotation about the C(O)-N bond. However for these compounds, one isomer predominated to such a degree in solution that the presence of the second isomer was barely detected by nmr spectroscopy. A temperature dependence study of the fluorine-19 resonance spectra of both 1 and 2 deg rotation about the C(O)-N bond. However for the first time, coupling between the trifluoromethyl group and a nitrogen proton was observed. Also the proton nmr spectrum of 1,1,1-trifluoroacetamide, itself, in a dry acetone solution at low temperatures afforded the direct observation of two separate signals for the two nitrogen protons. (Author).

Download or read book Part I Nuclear Magnetic Resonance Studies of Amides written by Biing-Ming Su and published by . This book was released on 1978 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of Molecular Structure and Internal Rotation in Amides by Nuclear Magnetic Resonance Spectroscopy written by Lester Reinhardt Isbrandt and published by . This book was released on 1972 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Study of Hindered Internal Rotation in Some Substituted Amides by Nuclear Magnetic Resonance Spectroscopy written by James Calvin Woodbrey and published by . This book was released on 1960 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gas Phase NMR written by Karol Jackowski and published by Royal Society of Chemistry. This book was released on 2016-02-09 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the recent NMR studies with the application of gaseous molecules. Among the comprehensively discussed aspects of the area it includes in particular: new multinuclear experiments that deliver spectral parameters of isolated molecules and provide the most accurate values of nuclear magnetic shielding, isotropic spin–spin coupling and relaxation times; advanced, precise and correct theoretical descriptions of spectral parameters of molecules as well as the application of gas-phase NMR measurements to chemical analysis and medicine. The progress of research in these fields is enormous and has rapidly changed our knowledge and understanding of molecular parameters in NMR spectroscopy. For example, accurate studies of the shielding for isolated molecules allow the exact determination of nuclear magnetic dipole moments, the calculated values of spectral parameters can be verified by precise gas-phase NMR measurements, and the application of hyperpolarized noble gases provides excellent MRI pictures of lungs. Aimed at graduates and researchers in spectroscopy, analytical chemistry and those researching the applications of NMR in medicine, this book presents the connections between sophisticated experiments, the theory of magnetic parameters and the exploration of new methods in practice.

Download or read book Biological NMR Spectroscopy written by John L. Markley and published by Oxford University Press. This book was released on 1997-01-30 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a critical assessment of progress on the use of nuclear magnetic resonance spectroscopy to determine the structure of proteins, including brief reviews of the history of the field along with coverage of current clinical and in vivo applications. The book, in honor of Oleg Jardetsky, one of the pioneers of the field, is edited by two of the most highly respected investigators using NMR, and features contributions by most of the leading workers in the field. It will be valued as a landmark publication that presents the state-of-the-art perspectives regarding one of today's most important technologies.

Download or read book Study of Hindered Internal Rotation in Some Substituted Amides by Nuclear Magnetic Resonance Spectroscopy written by William Chung-Tsing Tung and published by . This book was released on 1968 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modern NMR Spectroscopy in Education written by David Rovnyak and published by . This book was released on 2007 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is intended to be a comprehensive resource for educators seeking to enhance NMR-enabled instruction in chemistry. This book describes a host of new, modern laboratories and experiments.

Download or read book A Study of Hydrogen Bonding and Rotational Isomerism in Amides by Nuclear Magnetic Resonance Spectroscopy written by Laurine Anna LaPlanche and published by . This book was released on 1963 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NMR in Supramolecular Chemistry written by M. Pons and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: NMR is better suited than any other experimental technique for the characterization of supramolecular systems in solution. The presentations included here can be broadly divided into three classes. The first class illustrates the state of the art in the design of supramolecular systems and includes examples of different classes of supramolecular complexes: catenanes, rotaxanes, hydrogen-bonded rosettes, tubes, capsules, dendrimers, and metal-containing hosts. The second class comprises contributions to NMR methods that can be applied to address the main structural problems that arise in supramolecular chemistry. The third class includes biological supramolecular systems studied by state-of-the-art NMR techniques.

Download or read book Nuclear Magnetic Resonance Studies on the Hindered Rotation in N N disubstituted Amides written by Terence E. Kavanagh and published by . This book was released on 1969 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applications of Dynamic NMR Spectroscopy to Organic Chemistry written by Michinori Ōki and published by VCH. This book was released on 1985 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nitrogen 15 Nuclear Magnetic Resonance Spectroscopy written by George C. Levy and published by John Wiley & Sons. This book was released on 1979 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamic Nuclear Magnetic Resonance Studies of Conformational Processes in the Gas Phase written by Cristina Suarez and published by . This book was released on 1992 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Magnetic Resonance Spectroscopy in Molecular Biology written by A. Pullman and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 527 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the 11th Jerusalem Symposium on Quantum Chemistry and Biochemistry held in Jerusalem, Israel, April 3-7, 1978

Download or read book Internal Rotation in Amides Studies by Proton Magnetic Resonance Spectroscopy written by Torbjorn Drakenberg and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Magnetic Resonance of Biological Macromolecules Part C written by and published by Academic Press. This book was released on 2005-05-04 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt: The critically acclaimed laboratory standard, Methods in Enzymology, is one of the most highly respected publications in the field of biochemistry. Since 1955, each volume has been eagerly awaited, frequently consulted, and praised by researchers and reviewers alike. The series contains much material still relevant today - truly an essential publication for researchers in all fields of life sciences. Nuclear Magnetic Resonance of Biological Macromolecules, Part C is written with a "hands-on" perspective. That is, practical applications with critical evaluations of methodologies and experimental considerations needed to design, execute, and interpret NMR experiments pertinent to biological molecules.* One of the most highly respected publications in the field of biochemistry since 1955 * Frequently consulted, and praised by researchers and reviewers alike * Truly an essential publication for anyone in any field of the life sciences