Premium
Solute–solvent and solvent–solvent interactions in binary solvent mixtures. Part 8. The E T (30) polarity of binary mixtures of formamides with hydroxylic solvents
Author(s) -
Herodes Koit,
Leito Ivo,
Koppel Ilmar,
Rosés Martí
Publication year - 1999
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(199902)12:2<109::aid-poc97>3.0.co;2-l
Subject(s) - solvatochromism , formamide , chemistry , formamides , solvent , dimethylformamide , solvation , methanol , organic chemistry
Abstract Solvent effects on the binary mixtures of amides with alcohols and water were investigated by means of Reichardt's E T (30) solvatochromic indicator. E N Tparameters of binary solvent mixtures of formamide, N ‐methylformamide and N,N ‐dimethylformamide with water, methanol, propan‐2‐ol, 2‐methylpropan‐2‐ol, formamide, N ‐methylformamide and N,N ‐dimethylformamide were measured over the whole composition range of the mixtures. Application of a preferential solvation model to the solvatochromic data shows that the preferential solvation of the solvatochromic indicator by the amides decreases in the order N ‐methylformamide > formamide > N,N ‐dimethylformamide. Synergism is observed for the mixtures of the amides with alcohols of similar polarity ( E N Tvalue), i.e. methanol–formamide, methanol– N ‐methylformamide, propan‐2‐ol– N,N ‐dimethylformamide and 2‐methylpropan‐2‐ol– N,N ‐dimethylformamide binary systems. Copyright © 1999 John Wiley & Sons, Ltd.