Abstract
The results of dielectric relaxation experiments on solutions of LiClO 4, NaClO 4 and Bu 4NClO 4 in N, N-dimethylformamide (DMF), and N, N-dimethylacetamide (DMA), performed at 25°C in the frequency range 0.2≤ ν/GHz≤89 are presented. For all electrolytes, a solute relaxation process due to ion pairs is observed in addition to the solvent relaxation. The alkali salts form predominantly solvent-shared ion pairs in DMF and DMA, whereas contact ion pairs are observed for Bu 4NClO 4. In all cases, the rate of ion-pair formation is nearly diffusion-controlled. Effective solvation numbers were deduced from the solvent dispersion amplitude. Data suggest that the anion–solvent interactions are weak, whereas the alkali ions form a well-defined primary solvation shell. Interestingly, irrotational bonding of solvent molecules by Bu 4N + is observed, possibly due to steric interactions.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.