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  • Conductivities  (2)
  • Gibbs energies of transfer  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Conductance and ion association in dimethylsulfite (1986)
    Springer
    Journal of solution chemistry 15 (1986), S. 663-673 
    Details
    ISSN: 1572-8927
    Schlagwort(e): Conductivities ; Ion association ; 1∶1 electrolytes ; acetone ; dimethylsulfite
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract The electrolytic conductances of LiClO4, LiAsF6, NaClO4 and the n-butylammonium salts Bu4NCl, Bu4NClO4, and Bu4NBPh4 (tetraphenylborate) have been determined in dimethylsufite at 25°C. Ion association constants calculated from these data are interpreted in terms of solvent-separated ion pairs (for LiClO4, LiAsF6, and NaClO4), and contact ion pairs (for the n-butyl-ammonium salts). Comparisons are made for analogous electrolytes in acetone, and in which all salts form contact ion pairs.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00644598
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Conductance of 1:1 electrolytes in methyl formate (1987)
    Springer
    Journal of solution chemistry 16 (1987), S. 225-235 
    Details
    ISSN: 1572-8927
    Schlagwort(e): Conductivities ; 1:1 electrolytes ; methyl formate ; ion pairs ; triple ions ; ion solvation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract The electrolytic conductivities of LiClO4, LiAlCl4, LiAsF6, NaClO4, NaBPh4, and Bu4NClO4 have been measured in methyl formate at 25°C. Evidence is presented for strong association between the perchlorate ion and the formyl proton of the solvent. Ion association and triple ion formation constants suggest that LiClO4, LiAlCl4, and NaClO4 form solvent separate ion pairs and triple ions. NaBPh4 forms contact ion pairs and triple ions, and the remaining salts appear to form both types of ion pairs and triple ions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00646988
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  • 3
    Digitale Medien
    Digitale Medien
    Conductivities of KF and CsF in methanol at 25°C (1996)
    Springer
    Journal of solution chemistry 25 (1996), S. 541-553 
    Details
    ISSN: 1572-8927
    Schlagwort(e): Potassium ; cesium ; fluoride ; halide ions and perchlorate ; methanol ; water ; molar conductivities ; ion association ; Gibbs energies of transfer
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Electrolytic conductivities of KF and CsF in methanol solution have been determined at 25°C. The single ion molar conductivities of the fluoride ion, obtained from the two salts are in excellent agreement and indicate that the F− ion is highly solvated in methanol (MeOH). Combination of the present and literature data for related salts in both water and MeOH indicate that while the primary solvation of ions may be more extensive in H2O there is considerable enhancement of the secondary solvation sheath in MeOH. Recalculation of high precision literature conductivity data using a consistent mathematical approach indicates that ion pair formation constants for simple 1:1 electrolytes in MeOH are 1 or 2 orders of magnitude greater than in H2O. This is shown to be entirely due to the less favorable solvation of ions in MeOH, as the Gibbs energies of transfer of the neutral ion pairs MX from H2O to MeOH are also unfavorable. Calculations also show that ion association in MeOH is strongly influenced by coulombic interactions whereas in H2O short range interactions are generally more important.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00973084
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