Abstract
The dielectric losses in solutions of salts in several low dielectric constant solvents are studied as a function of frequency and concentration, using the calorimetric method. The results are interpreted according to the Debye theory, and critical frequencies, molecular radii, and dipole moments are evaluated wherever feasible. Solutions of tri-isoamylammonium picrate in benzene and diphenylmethane behave as a monodisperse system having a single well-defined polar structure relatively independent of concentration. Corresponding solutions of tetra-n-butylammonium thiocyanate, in contrast, show a marked departure from theoretical behavior for a monodisperse system, having a broad distribution of relaxation times and a high degree of association strongly dependent on concentration. Di-n-butyldioctadecylammonium thiocyanate shows monodisperse behavior at low concentrations, with more physically and electrically different polar bodies appearing as the concentration is increased. These results are in good agreement with polarization, conductance, and cryoscopic measurements for these systems.
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