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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of solution chemistry 20 (1991), S. 1001-1016 
    ISSN: 1572-8927
    Keywords: 18-crown-6-ether ; dibenzo-18-crown-6-ether ; apparent molar volume ; partial molar volume change on complex formation ; methanol ; acetonitrile ; dimethylsulfoxide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The apparent molar volumes of equimolar concentrations of 18-crown-6-ether (CE) or dibenzo-18-crown-6-ether (B2CE) and MCl (M=Na, K, or Cs) or MI in dilute solutions of anhydrous methanol, acetonitrile and dimethylsulfoxide have been calculated from density data measured at 25°C. After extrapolation to infinite dilution these results together with the apparent molar volumes of the crown ethers and the alkali metal halides were used to calculate the limiting partial molar volume change for the formation of the complexes. By noting that the charge of the complexed cation has been shown to be completely shielded from the solvent, the volume of complexation can be assumed to be a good estimation of the volume change due to electrostriction of the solvent by the cationic charge. The results are compared to the predictions of the Hepler equation.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of solution chemistry 4 (1975), S. 299-310 
    ISSN: 1572-8927
    Keywords: Dielectric constant ; ethanol ; high pressure ; Kirkwoodg K factors ; liquid association ; methanol ; n-propanol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Precise static dielectric constants are reported for methanol, ethanol, andn-propanol at 10,25, and 40° C and at pressures up to 3 kbar. The measurements were carried out by a low-frequency bridge method using a threeterminal, all-glass cell. An uncertainty of 0.05% is claimed for the data. The results are compared to data from previous investigations, whith the agreement in the absolute magnitude poor but the agreement in the pressure coefficient reasonable in most cases. The data are analyzed in terms of the Kirkwood correlation factorg K as obtained from the Fröhlich equation. In all cases, theg K factor decreases with increased pressure. The problems involved in calculating this factor from the experimental data are discussed, and it is shown that the trends ing K are very dependent upon the assumptions made in isolating the liquid dipole moment from its gas-phase value. This fact also indicates that an interpretation of theg K values in terms of stepwise association of correlation dipoles is premature at this time.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of solution chemistry 4 (1975), S. 745-762 
    ISSN: 1572-8927
    Keywords: KCl ; KBr ; KClO3 ; KBrO3 ; KlO3 ; KClO4 ; KlO4 ; D2O ; conductance ; transference numbers ; aqueous solutions ; structural effects ; solvent isotope effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Precise limiting ionic conductance data are reported for the first time for the alkali metal and tetraalkylammonium ions in D2O at 10°C as well as similar data for the halate and perhalate ions in D2O and H2O at 10 and 25°C. Precise transference numbers by the moving-boundary method are also reported for KBr in D2O at 10°C and, as a check on earlier work, for KCl in D2O at 25°C. In general, the structural properties of the ions, as reflected in the temperature coefficient of the limiting ionic conductances, are enhanced in D2O compared to H2O, although the differences are often small.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of solution chemistry 2 (1973), S. 23-35 
    ISSN: 1572-8927
    Keywords: methanol ; moving boundary ; transference numbers ; LiCl ; NaCl ; KCl ; Bu4NBr ; ion-pair association constants ; electrophoretic effect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Transference numbers are reported for LiCl and NaCl in methanol at 25°C and for NaCl, KCl, and Bu4NBr in methanol at 10°C. The potentiometric moving-boundary method as developed by Kay and Fratiello was employed to give a precision of about 0.05% and an accuracy of at least 0.1% as indicated by two independent determinations of the conductances of the Cl− and Br− ions. The data are extrapolated by the Fuoss-Onsager theory, and the magnitude of the electrophoretic effect is calculated as described by Kay and Dye. The agreement with this theory is quite good at both temperatures, although the å value required in the case of Bu4NBr is considerably larger than that obtained from conductance data. This agreement contrasts with that obtained for ethanol and acetone solutions where the measured electrophoretic effect is considerably larger than the corresponding calculated values. The importance of this fact in the determination of ion-pair association constants is discussed.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of solution chemistry 3 (1974), S. 857-864 
    ISSN: 1572-8927
    Keywords: Transference numbers ; dioxane-water ; ethanol-water ; KCl ; moving boundary
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Transference numbers were determined by the moving-boundary method for KCl in aqueous mixtures containing 12, 20, 40, 60, and 79 wt. % ethanol, and 22, 44, 62, and 75 wt. % 1,4-dioxane. The boundaries were detected by the potentiometric method using an autogenic cell with a cadmium anode. Little concentration dependence was expected since all the transference numbers were close to 0.5. The Fuoss-Onsager theory for the electrophoretic effects was used for extrapolation to infinite dilution. The precision of the measurements appears to be well within 0.05%.
    Type of Medium: Electronic Resource
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