Solute-solvent and solvent-solvent interactions in binary solvent mixtures.: Part 8.: The ET(30) polarity of binary mixtures of formamides with hydroxylic solvents

被引：0
|
作者：
Herodes, K
Leito, I
Koppel, I
Rosés, M
机构：
[1] Univ Barcelona, Dept Quim Analit, E-08028 Barcelona, Spain
[2] Tartu State Univ, Inst Chem Phys, EE-2400 Tartu, Estonia
来源：
JOURNAL OF PHYSICAL ORGANIC CHEMISTRY | 1999年 / 12卷 / 02期
关键词：
solute-solvent interactions; solvent-solvent interactions; binary solvents; amide-water mixtures; amide-alcohol mixtures; amide-amide mixtures; solvatochromic indicators;
D O I：
10.1002/(SICI)1099-1395(199902)12:2<109::AID-POC97>3.3.CO;2-C
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
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-T(N) parameters 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-T(N) value), i.e. methanol-formamide, methanol-N-methylformamide, propan-2-ol-N,N-dimethylformamide and 2-methylpropan-2-ol-N,N-dimethylformamide binary systems. Copyright (C) 1999 John Wiley & Sons, Ltd.
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收藏
页码：109 / 115
页数：7
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