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Spectroscopic studies of ionic solvation. XX. Cesium-133 NMR study of cesium salts in different solvents

Abstract

Cesium-133 chemical shifts were measured in a number of solvents as a function of salt concentration and of the counterion. Infinite-dilution chemical shifts (vs. aqueous Cs+ ion at infinite dilution) ranged from +59.8 ppm for nitromethane solutions to −29.4 ppm for pyridine. In general, the magnitude of the downfield chemical shift reflected the donor ability of the solvents. Ion-pair formation constants were calculated from the concentration dependences of133Cs chemical shifts in several nonaqueous solvents.

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DeWitte, W.J., Liu, L., Mei, E. et al. Spectroscopic studies of ionic solvation. XX. Cesium-133 NMR study of cesium salts in different solvents. J Solution Chem 6, 337–348 (1977). https://doi.org/10.1007/BF00647048

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Key words

  • Cesium-133 NMR chemical shifts
  • nonaqueous solvents
  • solvation
  • ion pairs
  • ion-pair formation constants