Buchner, Richard and Barthel, Josef (1992) Dynamics of methanol-tetrachloromethane mixtures - a dielectric relaxation study. Journal of Molecular Liquids 52, pp. 131-144.
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Complex permittivity spectra of methanol-tetrachloromethane mixts. at 225°C are presented, covering the frequency range 0.95 ≤ ν/GHz ≤ 89. The mole fraction x2 of CCl4 is varied in the range of 0 ≤ x2 ≤ 0.59. A dielec. relaxation model for methanol with superposition of 3 Debye equations must be used to fit the data for all studied mixts. Concn. dependence of the relaxation times and dispersion amplitudes reveal hydrogen bonding between the methanol mols. as the dominating type of interaction. A model is proposed for the calcn. of the fraction of alc. monomer and chain-end mols. and the results from high frequency permittivity measurements are compared with information from other methods. A relaxation mechanism is proposed involving three modes for methanol.
|Institutions:||Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > PD Dr. Richard Buchner|
|Keywords:||methanol tetrachloromethane hydrogen bond dielec relaxation|
|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 05:40|
|Last Modified:||14 Jun 2012 05:40|