Author: Shao-Ta WuPublisher:
ISBN:
Category : Spectrum analysis
Languages : en
Pages : 506
Book Description
NMR Studies of Hindered Internal Rotation and Association of N, N- Dimethylthiocarbamyl Chloride in Solvent Mixtures Containing Aromatic Groups
Author: Shao-Ta WuPublisher:
ISBN:
Category : Spectrum analysis
Languages : en
Pages : 506
Book Description
Dissertation Abstracts International
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 1152
Book Description
American Doctoral Dissertations
Author: Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 624
Book Description
National Union Catalog
Author: Comprehensive Dissertation Index
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 818
Book Description
Vols. for 1973- include the following subject areas: Biological sciences, Agriculture, Chemistry, Environmental sciences, Health sciences, Engineering, Mathematics and statistics, Earth sciences, Physics, Education, Psychology, Sociology, Anthropology, History, Law & political science, Business & economics, Geography & regional planning, Language & literature, Fine arts, Library & information science, Mass communications, Music, Philosophy and Religion.
Comprehensive Dissertation Index: Chemistry, P-Z
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 844
Book Description
Comprehensive Dissertation Index: Chemistry, E-O
Author: University Microfilms InternationalPublisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 858
Book Description
Current Programs
Author: 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: Gunilla Isaksson