Author: Biing-Ming SuPublisher:
ISBN:
Category : Amides
Languages : en
Pages : 956
Book Description
Part I. Nuclear Magnetic Resonance Studies of Amides
Author: Biing-Ming SuPublisher:
ISBN:
Category : Amides
Languages : en
Pages : 956
Book Description
Nuclear Magnetic Resonance Studies of the Structure of Aqueous Amide Solutions
Author: K. H. LadnerOxygen and Nitrogen Nuclear Magnetic Resonance Studies of Amides and Aromatic Aldehydes and Ketones
Author: Thomas Edgar St. AmourPublisher:
ISBN:
Category : Nuclear magnetic resonance
Languages : en
Pages : 328
Book Description
A Study of Molecular Structure and Internal Rotation in Amides by Nuclear Magnetic Resonance Spectroscopy
Author: Lester Reinhardt IsbrandtPublisher:
ISBN:
Category : Amides
Languages : en
Pages : 292
Book Description
A Nuclear Magnetic Resonance Study of Amides and Polypeptidess
Author: William Esley StewartPublisher:
ISBN:
Category : Amides
Languages : en
Pages : 346
Book Description
Study of Hindered Internal Rotation in Some Substituted Amides by Nuclear Magnetic Resonance Spectroscopy
Author: James Calvin WoodbreyPublisher:
ISBN:
Category : Amides
Languages : en
Pages : 420
Book Description
A Study of Hydrogen Bonding and Rotational Isomerism in Amides by Nuclear Magnetic Resonance Spectroscopy
Author: Laurine Anna LaPlanchePublisher:
ISBN:
Category : Amides
Languages : en
Pages : 318
Book Description
NMR Studies of Proton Exchange in Amides
Author: Eric Richard JohnstonPublisher:
ISBN:
Category : Amides
Languages : en
Pages : 382
Book Description
Nuclear Magnetic Resonance Studies of Solvent Effects on the Hindered Internal Rotation in N, N-disubstituted Amides Higher Alkyl Amides
Author: A. G. WhittakerPublisher:
ISBN:
Category :
Languages : en
Pages : 37
Book Description
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).
Author: Mehrafrooz Mednejad