Abstract
The association of thallium acetate ion in 2,2,2-trifluoroethanol and dimethyl-sulfoxide has been investigated by thallium-205 NMR spectroscopy. Analysis of the association constants as a function of temperature indicates that in trifluoroethanol the association enthalpy and entropy are, respectively, 1.6 kcal-mol−1 and 19.3 cal-mol−1-K−1 and in dimethylsulfoxide they are-0.99 kcal-mol−1 and 18.0 cal-mol−1-K−1. Examination of the temperature dependence of the chemical shift of the ion-pair reveals that in dimethylsulfoxide the ion-pair exists as a contact species, while in trifluoroethanol the solvent-separated ion-pair is more likely.
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Turner, G.L., Hinton, J.F. & Millet, F.S. A thallium-205 NMR study of thallium acetate ion association in 2,2,2-trifluoroethanol and dimethylsulfoxide. J Solution Chem 11, 379–386 (1982). https://doi.org/10.1007/BF00649036
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DOI: https://doi.org/10.1007/BF00649036