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 Nuclear Magnetic Resonance Studies of the Structure of Aqueous Amide Solutions written by K. H. Ladner and published by . This book was released on 1972 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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 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 Oxygen and Nitrogen Nuclear Magnetic Resonance Studies of Amides and Aromatic Aldehydes and Ketones written by Thomas Edgar St. Amour and published by . This book was released on 1980 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Nuclear Magnetic Resonance Study of Amides and Polypeptidess written by William Esley Stewart and published by . This book was released on 1966 with total page 346 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 Nuclear Magnetic Resonance Studies of Solvent Effects on the Hindered Internal Rotation in N N disubstituted Amides Higher Alkyl Amides written by A. G. Whittaker and published by . This book was released on 1965 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: The temperature dependence of the chemical shifts due to hindered internal rotation was measured for diethylformamide, diethylacetamide, diisopropylformamide, diisopropylacetamide and for solutions of these molecules in various solvents. In all cases, the chemical shifts showed unusual behavior. Conventional methods coupled with certain approximations were used to calculate activation energies as estimates for the rotational barrier to the internal rotation about the N-CO bond. These values were found to lie in the range of 5 to 26 kcal/mole. However, it is difficult to determine the real significance of these numbers; the behavior of the chemical shifts was such that no underlying concepts could be developed that would correlate the observed results except for the conclusion that the solvent plays a dominant role in the relationship between chemical shift and temperature. (Author).
Download or read book NMR studies of amides written by Mehrafrooz Mednejad and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 NMR Studies on Isomerization and Proton Exchange in Amides written by Charles Peter Lollo and published by . This book was released on 1983 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Nuclear Magnetic Resonance Studies of Conformational Processes in the Gas Phase written by Clifford Brent LeMaster and published by . This book was released on 1988 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NMR Studies of Proton Exchange in Amides written by Eric Richard Johnston and published by . This book was released on 1980 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Magnetic Resonance Studies of Some Problems in Molecular Structure a Zeise s Salt b Amide Salts written by Charles Richard Redpath and published by . This book was released on 1960 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NMR Studies of Proton Exchange of Amides in Buffers and in Micelles and of Malononitrile written by Jung-Hui Chen and published by . This book was released on 1989 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
