A thallium-205 NMR study of thallium acetate ion association in 2,2,2-trifluoroethanol and dimethylsulfoxide |
| |
Authors: | G. L. Turner J. F. Hinton F. S. Millet |
| |
Affiliation: | (1) Department of Chemistry, University of Arkansas, 72701 Fayetteville, AR |
| |
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. |
| |
Keywords: | Dimethylsulfoxide thallium acetate trifluoroethanol Tl-205 NMR chemical shifts |
本文献已被 SpringerLink 等数据库收录! |
|