NMR Studies of Hindered Internal Rotation and Association of N, N- Dimethylthiocarbamyl Chloride in Solvent Mixtures Containing Aromatic Groups PDF Download
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Author: Shao-Ta Wu
Publisher:
ISBN:
Category : Spectrum analysis
Languages : en
Pages : 506
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Author: Shao-Ta Wu
Publisher:
ISBN:
Category : Spectrum analysis
Languages : en
Pages : 506
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Book Description
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 1152
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Author:
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ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 624
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Author:
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ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 818
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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.
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Category : Union catalogs
Languages : en
Pages : 528
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Category : Dissertations, Academic
Languages : en
Pages : 844
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Author: University Microfilms International
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Category : Dissertations, Academic
Languages : en
Pages : 858
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Category : Engineering
Languages : en
Pages : 554
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Author: A. G. Whittaker
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Category :
Languages : en
Pages : 37
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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
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ISBN:
Category :
Languages : en
Pages : 110
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