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  • 2005-2009
  • 1990-1994  (1)
  • 1980-1984  (1)
  • 1965-1969
  • acetonitrile  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Solvation of ions, part XXX. Thermodynamics of transfer of copper ions from water to solvent mixtures (1982)
    Springer
    Journal of solution chemistry 11 (1982), S. 495-508 
    Details
    ISSN: 1572-8927
    Keywords: Thermodynamic transfer quantities ; acetonitrile ; pyridine ; 2-hydroxycyanoethane ; aqueous organic solvent mixtures ; Cu2+, Cu+, and Ag+ ions ; hydrometallurgy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Free energies and Walden products show that the Cu+ and Ag+ ions are specifically solvated by acetonitrile (AN), 2-hydroxycyanoethane (HAN), and by pyridine (Py) whereas Na+ is specifically solvated by water, in mixtures of these organics with water. The Cu2+ ion is specifically solvated by pyridine in pyridine-water mixtures, but by water in acetonitrile-water mixtures. Ion-solvent, coordinated solvent-bulk solvent, and solvent-solvent interactions produce large entropy losses in the order Cu+≫Ag+〉Na+ for transfer of these ions from water to dilute acetonitrile-water. The metallurgically important oxidations of copper, silver, CuS and Cu2 with CuSO4 in water are strongly favored in an enthalpic and free energy sense by the addition of acetonitrile, but addition of acetonitrile also produces a large loss of entropy for the reactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00647111
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  • 2
    Electronic Resource
    Electronic Resource
    Ion solvation in lithium battery electrolyte solutions. 1. Apparent molar volumes (1991)
    Springer
    Journal of solution chemistry 20 (1991), S. 1059-1078 
    Details
    ISSN: 1572-8927
    Keywords: Apparent molar volumes ; electrolytes ; lithium batteries ; propylene carbonate ; acetonitrile ; dimethoxyethane ; tetrahydrofuran ; mixed solvents
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Apparent molar volumes, Vϕ(MX), of seven electrolytes (NaClO4, NaCF3SO3, NaBPh4, LiClO4, LiAsF6, Ph4AsCF3SO3 and KCF3SO3) have been determined by vibrating-tube densimetry in nonaqueous solvent mixtures of propylene carbonate (PC) with acetonitrile (AN), dimethoxyethane (DME) and tetrahydrofuran (THF). Vϕ(MX) was measured at an electrolyte concentration of 0.05M over the entire solvent composition range wherever possible. Ionic apparent molar volumes of transfer, ΔtVφ(ion), were obtained via the tetraphenylarsonium tetraphenylborate (TATB) assumption. ΔtVφ(ion) from PC to the mixed solvents are generally strongly negative for both cations and anions consistent with the greater compressibilities and lower dielectric constants of the cosolvents. In PC/AN mixtures cations and anions have similar values of ΔtVφ(ion) but in PC/DME and PC/THF mixtures they differ considerably. Cationic volumes show the expected dependence on ion-size but the differences among the anion volumes are much greater than expected at high cosolvent compositions. These effects are discussed in terms of preferential solvation and other solvent interactions. The implications of these findings for lithium batteries are briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00649097
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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