Barthel, Josef and Bachhuber, K. and Buchner, Richard (1995) Dielectric relaxation of NaClO4 solutions in formamide, N-methylformamide, and N,N-dimethylformamide. Zeitschrift fuer Naturforschung, A: Physical Sciences 50 (1), pp. 65-74.
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Complex permittivity spectra in the frequency range 0.95 ≤ v/[GHz] ≤ 89 for N,N-dimethylformamide (DMF), N-methylformamide (NMF), formamide (FA) and their solns. of NaClO4 are investigated to study the change of liq. structure and dynamics arising from the availability of one hydrogen-bond acceptor site together with no (DMF), one (NMF), or two (FA) donor sites on the same mol. Three solvent relaxation processes are obsd. for NMF and two for FA and DMF. The relaxation parameters are used to det. solvation nos. They show that ion-solvent interactions lead to a redn. of the av. length of the H-bonded NMF chains but have only moderate influence on the FA structure. An addnl. sol. relaxation process in DMF solns. is due to the diffusion-controlled formation and decompn. of solvent-shared ion pairs.
|Institutions:||Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > PD Dr. Richard Buchner|
|Keywords:||sodium perchlorate formamide solvation solvent dynamics permittivity sodium perchlorate formamide structure dynamics ion pair sodium perchlorate formamide dielec relaxation sodium perchlorate formamide|
|Subjects:||500 Science > 540 Chemistry & allied sciences|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||14 Jun 2012 06:25|
|Last Modified:||14 Jun 2012 06:25|