Thallium-205 NMR spectroscopy. Solvation of the Tl(l) ion in the binary solvent systems water/pyridine,water/dimethyl sulfoxide,and pyridine/dimethyl sulfoxide |
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Authors: | Richard W Briggs James F Hinton |
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Institution: | (1) Department of Chemistry, University of Arkansas, 72701 Fayetteville, Arkansas |
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Abstract: | Solvation of the Tl+ ion in 0.005M solutions of water/pyridine, water/dimethyl sulfoxide, and pyridine/dimethyl sulfoxide was studied with
205
Tl NMR spectroscopy as a function of solvent composition and anion (NO
3
–
and ClO
4
t-
). Dimethyl sulfoxide solvated the Tl+ ion more strongly than did pyridine, despite the latter's greater electron-donating ability. This was explained in terms of structural effects, which were found to be large for all three binary solvent systems. Ion pairing was evident in the DMSO/pyridine and water/pyridine solvent systems in which the pyridine mole fraction was greater than 0.8. |
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Keywords: | Solvation thallium-205 NMR spectroscopy water pyridine dimethyl sulfoxide |
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