Journal of Solution Chemistry

, Volume 36, Issue 2, pp 153–170 | Cite as

Conductivity Studies of n-Tetrabutylammonium Tetraphenylborate in 3-Pentanone in the Temperature Range from 283.15 to 329.15 K

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Abstract

The molar conductivities (Λ) of solutions of n-tetrabutylammonium tetraphenylborate (NBu4BPh4) in 3-pentanone have been measured in the temperature range from 283.15 to 329.15 K. The conductance data have been analyzed using the Lee-Wheaton conductivity equation with the distance parameter (a) set at Bjerrum’s pairing distance, and the limiting molar conductivities (Λo) and the association equilibrium constants (K A) have been derived. The limiting ion conductivities (λ_±o) have been evaluated according to the method of Krumgalz. The λ+ o values have been compared with λ+ o values calculated from the empirical equation of Gill. The thermodynamic functions, Gibbs energy (Δ G A o), enthalpy (Δ H A o) and entropy (Δ S A o) for the process of ion-pair formation as well as the activation energy of the ionic movement (ΔH ∗) have been evaluated. The obtained results are discussed in terms of ion-ion and ion-solvent interactions.

Keywords

Association constant Limiting ionic conductivity 3-Pentanone n-Tetrabutylammonium tetraphenylborate Thermodynamic quantities 
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© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  1. 1.Institut für ChemieHumboldt-Universität zu BerlinBerlinGermany
  2. 2.Laboratory of Physical Chemistry, Department of ChemistryNational and Kapodistrian University of AthensAthensGreece

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