Abstract
Proton resonance spectra have been obtained for a variety of clathrate hydrates as a function of temperature from near the decomposition point to about −70°C. It is possible to calculate the Arrhenius activation energy (∼8 kcal mole−1) for motional narrowing of the linewidths of the host molecules and this is attributed to the combined effects of rotation and diffusion in the solid. By selective deuteration linewidths are found for proton-containing guest molecules. The guest molecules undergo rapid rotation in the solid.
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