Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5160252 | Journal of Molecular Structure | 2017 | 25 Pages |
Abstract
The reaction of lithium bis(trifluoromethanesulfonyl)imide with tetraphenylphosphonium bromide in water leads to the formation of tetraphenylphosphonium bis(trifluoromethanesulfonyl)imide ([PPh4+][(CF3SO2)2Nâ]). The obtained compound was identified by means of 1H, 13C, 19F and 31P NMR spectroscopy. Although it has a structure similar to ionic liquids, it exhibits a melting point above 100 °C. Besides describing the synthesis, a detailed characterization of its conductivity and vibrational spectroscopic properties is presented. For the latter, FT-Raman and FTIR/ATR spectroscopies are used in the wavenumber range from 150 to 3500 cmâ1 and from 600 to 3500 cmâ1, respectively. Density functional theory calculations reveal a minor influence of the interionic interactions on the vibrational structure. Consequently, the computational vibrational spectra of the isolated ions show a good agreement with the experimental data. A detailed vibrational assignment is presented. Furthermore, the conductivity data indicate a solid-solid phase transition about 130 K below the melting point.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Boumediene Haddad, Annalisa Paolone, Didier Villemin, Moumene Taqiyeddine, El-habib Belarbi, Serge Bresson, Mustapha Rahmouni, Nilesh R. Dhumal, Hyung J. Kim, Johannes Kiefer,