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205Tl NMR studies: Ion pairing of Tl+ and (CH3)2Tl+ with NO −3 and ClO −4 in various solvents

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Abstract

The concentration dependence of the205Tl chemical shifts of Tl+ and of (CH3)2Tl+ ions was determined in several solvents with NO −3 and ClO −4 counterions. In general, increased ion pairing caused a low-frequency shift of the205Tl resonance, with the exceptions of (CH3)2TlNO3 inn-butylamine and TlNO3 in N,N-dimethylformamide (DMF) and in hexamethylphosphorotriamide (HMPA). In HMPA,205Tl linewidths of both Tl+ and (CH3)2Tl+ increased dramatically with dilution below 0.1M. Analysis of the data allowed ion-pair formation constants and205Tl chemical shifts for the ion-paired cation and for the free (solvated) cation to be estimated for some of the solvents.

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Authors and Affiliations

  1. Department of Chemistry, University of Arkansas, 72701, Fayetteville, Arkansas

    Richard W. Briggs, Kenneth R. Metz & James F. Hinton

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  1. Richard W. Briggs
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  2. Kenneth R. Metz
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  3. James F. Hinton
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Briggs, R.W., Metz, K.R. & Hinton, J.F. 205Tl NMR studies: Ion pairing of Tl+ and (CH3)2Tl+ with NO −3 and ClO −4 in various solvents. J Solution Chem 8, 478–487 (1979). https://doi.org/10.1007/BF00716006

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  • DOI: https://doi.org/10.1007/BF00716006

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