Premium
Solute‐solvent and solvent‐solvent interactions in binary solvent mixtures. 2. Effect of temperature on the E T (30) polarity parameter of dipolar hydrogen bond acceptor‐hydrogen bond donor mixtures
Author(s) -
Bosch Elisabeth,
Rosés Martí,
Herodes Koit,
Koppel Ilmar,
Leito Ivo,
Koppel Ivar,
Taal Veiko
Publication year - 1996
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/(sici)1099-1395(199606)9:6<403::aid-poc799>3.0.co;2-d
Subject(s) - chemistry , solvent , hydrogen bond , solvent polarity , acceptor , polarity (international relations) , solvent effects , photochemistry , dipole , solvatochromism , organic chemistry , molecule , biochemistry , physics , cell , condensed matter physics
The effect of temperature on the Dimroth‐Reichardt E T (30) parameter of binary mixtures of dimethyl sulfoxide, acetonitrile and nitromethane with alcohols and water was studied. The E T (30) polarity parameter of many of these binary mixtures exhibits a strong synergism. Dimethyl sulfoxide, acetonitrile and nitromethane form hydrogen‐bonded complexes with the alcohols more polar than themselves. The E T (30) values of the mixtures were fitted according to an earlier model, based on solvent exchange equilibria, that allows calculation of the E T (30) values of the hydrogen‐bonded complexes. The variation of the E T (30) values of the pure solvents and the hydrogen‐bonded complexed solvents with temperature shows that the synergism decreases as the temperature increases.