The Structuredness of Solvents. 2. Data for Ambient Conditions

Yizhak Marcus*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

In view of the inadequacy of Trouton's constant for the expression of the structuredness of solvents at ambient temperatures, alternative measures have been sought. Calculations of the entropy deficit ΔΔvapS0/R of solvents at ambient conditions relative to their vapors and compared to presumably unstructured alkanes with the same number and arrangement of skeletal atoms have been made. Data for nonpolar, dipolar aprotic, non-hydroxylic protic and hydroxylic solvents are presented, with ΔΔvapS0/R>2 representing structured solvents. Empirically, the heat capacity density of solvents at ambient temperatures, [Cp(l)-Cp(g)]/ V], is another meaningful measure of the structuredness of solvents, compatible with the former one. Values >0.6 J-K-1-cm-3 signify a structured solvent.

Original languageEnglish
Pages (from-to)455-469
Number of pages15
JournalJournal of Solution Chemistry
Volume25
Issue number5
DOIs
StatePublished - May 1996

Keywords

  • Entropy of vaporization
  • Second virial coefficient
  • Structuredness

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