Partial Molar Volumes of Tetraalkylammonium Ions in N, N-Dimethylformamide |
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| Authors: | L P Safonova E V Svetsova M G Kiselev |
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| Institution: | (1) Ivanovo State University of Chemistry and Technology, 7, F. Engels Ave., 153460 Ivanovo, Russia;(2) Institute of Solution Chemistry of RAS, 1, Akademicheskaya St., 153045 Ivanovo, Russia |
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| Abstract: | The densities of tetraalkylammonium bromide, R4NBr (R = Et, Pr, Bu, Hex, Hep, Oct), solutions in dimethylformamide have been measured for the composition range (0.05–0.4) mol-kg−1 at 25 ∘C. Apparent molar Vφ and limiting partial molar volumes ⫫2o of the electrolytes have been evaluated. Using the extrapolation values, the limiting partial molar volumes of the tetraalkymammonium ions (⫫io) have been calculated. Analysis of different contributions to the ionic ⫫io indicated partial penetration of solvent molecules into the van der Waal’s volume of tetraalkylammonium (TAA) ions. |
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| Keywords: | Partial molar volumes N N-dimethylformamide tetraalkylammonium ions |
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