Dissociation of C6F5SO3Li in two organic solvents with different dielectric constants: a Raman spectroscopic study

✍ Scribed by G. Hirankumar; C. Iojoiu; F. Alloin; J. Y. Sanchez; T. Pagnier

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 177 KB
• Volume: 38
• Category: Article
• ISSN: 0377-0486
• DOI: 10.1002/jrs.1807

✦ Synopsis

Abstract

Organic solutions of lithium pentafluorobenzene sulfonate (C~6~F~5~SO~3~Li) with varying molalities in N,N‐dimethyl formamide (DMF) and triethyleneglycol dimethylether (triglyme) were investigated by Raman spectroscopy. Spectral decomposition in the ν~s~(SO~3~) stretching region showed bands characteristic of free anions, ion pairs and various aggregates. The relative fraction of each species has been followed as a function of salt molality. In DMF, free anions dominate, while in triglyme ion pairs dominate, in accordance with the solvent dielectric constant. Copyright © 2007 John Wiley & Sons, Ltd.