Abstract
Proton magnetic relaxation rates of solutions of LiCl and LiI in isotopically labelled ethanols CH3CD3OD, CD3CH2OD and CD3CD2OH have been measured as functions of temperature and concentration mostly at v=30 MHz, where 2πλτ≃1. The data were reduced in a way that revealed that CH3 and CH2 relaxation curves contained a residuum from the slow motion of the OH group in many cases. Thus, the rotational time correlation function of the CH3 and CH2 groups contain a residuum term stemming from the slow motion within the same molecule. The data show a threshold of the rotational energy which has to be exceeded in order to make the effect observable.
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