Abstract
Cation-anion and solvent-anion interactions in solutions of lithium and tetrabutylammonium trifluoromethanesulfonate dissolved in eight solvents are studied using Raman and infrared vibrational spectroscopy. A plot of the frequency shifts of several anion modes against the electron pair acceptance polarity index E T (30) of the solvents suggests an electrophilic interaction between the solvent and the anion. The relative contributions of anion-cation interactions and anion-solvent interactions are estimated by measuring the splitting of the doubly degenerate SO3 antisymmetric stretching mode of the anion.
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Frech, R., Huang, W. Anion-solvent and anion-cation interactions in lithium and tetrabutylammonium trifluoromethanesulfonate solutions. J Solution Chem 23, 469–481 (1994). https://doi.org/10.1007/BF00972613
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DOI: https://doi.org/10.1007/BF00972613