Abstract
Measurements of the temperature dependence of the 35Cl nuclear quadrupole resonance frequency, nu Q(T), in the gamma phase of benzenesulphonyl chloride and the spin-lattice relaxation time, T1(T), for the three crystalline phases of the same compound were used to study the influence of different crystalline structures on the triggering of semiexternal molecular modes. From a comparative analysis of the effects that the semi-external modes (SEM) have upon nu Q(T) and T1(T) it is possible to deduce that there is a weak influence of the crystalline structure on the triggering temperature of SEMs. Furthermore, some properties of molecular torsional and semi-external modes, for each crystalline structure of benzenesulphonyl chloride, are deduced.
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