Data on the electrical conductance, density, viscosity, and surface tension of fluoride mixtures have been systematically collected and evaluated. Results are given for 44 binary mixtures over a range of compositions and temperatures. Values of the above properties for the single salts have been updated in accord with previously advanced recommendations.
significant charge transfer from the radical. This is confirmed by the large scalar contribution to the 7Li transverse relaxation rate from I*S coupling. The observed 7Li contact shifts are 1 order of magnitude higher in CH3CN than in THE, which confirms a weaker interaction of Li+ with CH3CN. The 7Li contact shifts in CH3CN decrease as the temperature increases, because a contact shift in the Li+-radical complex is proportional to the inverse absolute temperature (Curie law dependence) and because the mole fraction of the complex decreases with the temperature increase (AH¡ = -3.3 ± 0.8 kJ mol"1). In THE the mole fraction of the Li+-radical complex increases with the temperature increase (AH{ = 4.6 ± 0.2 kJ mol"1 3); in this case the experimental contact shifts increase as temperature increases.
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