NMR study of crown ether motion in two alkalides
| Autor: | Judith L. Eglin, Peter P. Edwards, Ahmed S. Ellaboudy, Michael J. Wagner, Lauren E. H. McMills, N.C. Pyper, James L. Dye |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
chemistry.chemical_classification
Alkalide 18-Crown-6 Relaxation (NMR) General Engineering Spin–lattice relaxation chemistry.chemical_element chemistry.chemical_compound Nuclear magnetic resonance chemistry 15-Crown-5 Caesium Physical chemistry Physical and Theoretical Chemistry Inorganic compound Crown ether |
| Zdroj: | The Journal of Physical Chemistry. 96:9656-9660 |
| ISSN: | 1541-5740 0022-3654 |
| DOI: | 10.1021/j100203a018 |
| Popis: | Nuclear spin-lattice relaxation times (T 1 ) of both 133 Cs and 23 Na were measured as a function of temperature for two cesium sodides, Cs + (18-crown-6) 2 Na - and Cs + (15-crown-5) 2 Na - . A logarithmic dependence of the T 1 values of these two compounds on the inverse temperature is interpreted as the result of crown ether rotational/conformational reorientation with average activation barriers of 31.2 and 35.4 kJ mol -1 , respectively |
| Databáze: | OpenAIRE |
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