Skip to main content
SpringerLink
Log in

Heats of dilution of trialkyl phosphates in iso-octane and carbon tetrachloride: Interpretation in terms of self-association

  • Published:
Journal of Solution Chemistry Aims and scope Submit manuscript

Abstract

The heats of solution and dilution of triethyl phosphate (TEP), tripropyl phosphate (TPP), and tributyl phosphate (TBP) in iso-octane have been measured at 25°C. The enthalpy of dilution was found to decrease with hydrocarbon chain length. The resulting apparent molal heat content, φL, values are interpreted in terms of the degree and nature of the associated species present assuming that the heat of dilution is essentially due to the breakdown of the various associated species. The results are consistent with a monomer-to-dimer model. Equilibrium constants and enthalpy change values are calculated for the dimerization reaction. The heat of dilution of TBP in carbon tetrachloride was exothermic rather than endothermic, indicating significant solute-solvent interaction.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. E. M. Woolley, J. G. Travers, B. P. Erno, and L. G. Hepler,J. Phys. Chem. 75, 3591 (1971).

    Google Scholar 

  2. E. M. Woolley and L. G. Hepler,J. Phys. Chem. 76, 3058 (1972).

    Google Scholar 

  3. B. D. Anderson, J. H. Rytting, S. Lindenbaum, and T. Higuchi,J. Phys. Chem., in press.

  4. L. Tsimering and A. S. Kertes,J. Chem. Thermodyn. 6, 411 (1974).

    Google Scholar 

  5. A. S. Kertes, inRecent Advances in Liquid-Liquid Extraction, C. Hanson, ed. (Pergamon, London, 1971), Chap. 2.

    Google Scholar 

  6. A. S. Levine and S. Lindenbaum,J. Solution Chem. 2, 445 (1973).

    Google Scholar 

  7. I. Wadso,Acta Chem. Scand. 22, 927 (1968).

    Google Scholar 

  8. S. N. Deming and S. L. Morgan,Anal. Chem. 45, 278A (1973).

    Google Scholar 

  9. S. Lindenbaum, D. Stevenson, and J. H. Rytting,J. Solution Chem. 4, 893 (1975).

    Google Scholar 

  10. C. V. Krishnan and H. L. Friedman,J. Solution Chem. 2, 37 (1973).

    Google Scholar 

  11. S. S. Davis, T. Higuchi, and J. H. Rytting,J. Pharm. Pharmacol. 24, 30P (1972).

    Google Scholar 

  12. S. S. Davis, T. Higuchi, and J. H. Rytting,Advan. Pharm. Sci. 4, 73 (1974).

    Google Scholar 

  13. E. M. Arnett, R. P. Quirk, and J. J. Burke,J. Am. Chem. Soc. 92, 1260 (1970).

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Pharmaceutical Chemistry Department, McCollum Laboratories, The University of Kansas, 66045, Lawrence, Kansas

    J. Howard Rytting & Siegfried Lindenbaum

Authors
  1. J. Howard Rytting
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Anne Goldkamp
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Siegfried Lindenbaum
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Rytting, J.H., Goldkamp, A. & Lindenbaum, S. Heats of dilution of trialkyl phosphates in iso-octane and carbon tetrachloride: Interpretation in terms of self-association. J Solution Chem 4, 1005–1010 (1975). https://doi.org/10.1007/BF01074742

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01074742

Key words

Search

Navigation