TY - JOUR
T1 - The Structuredness of Solvents. 2. Data for Ambient Conditions
AU - Marcus, Yizhak
PY - 1996/5
Y1 - 1996/5
N2 - 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.
AB - 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.
KW - Entropy of vaporization
KW - Second virial coefficient
KW - Structuredness
UR - http://www.scopus.com/inward/record.url?scp=0345950219&partnerID=8YFLogxK
U2 - 10.1007/BF00972992
DO - 10.1007/BF00972992
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AN - SCOPUS:0345950219
SN - 0095-9782
VL - 25
SP - 455
EP - 469
JO - Journal of Solution Chemistry
JF - Journal of Solution Chemistry
IS - 5
ER -