The enthalpies of transfer of diaza-18-crown-6 isomers into various solvents

被引：0
|
作者：
Barannikov, VP [1 ]
Guseinov, SS [1 ]
V'yugin, AI [1 ]
机构：
[1] Russian Acad Sci, Inst Chem Solut, Ivanovo, Russia
来源：
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY | 2004年 / 78卷 / 02期
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D O I：
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中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The enthalpies of solution of the 1,7-diaza-18-crown-6 and 1,10-diaza-18-crown-6 isomers were studied calorimetrically in tetrachloromethane, benzene, chloroform, pyridine, acetone, acetonitrile, DMFA, DMSO, methanol, and water at 298.15 K. The enthalpies of transfer of the crown ethers corrected for the different enthalpies of formation of cavities changed in parallel with the dipole moment of solvent molecules. Specific interactions between the crown ethers and water, chloroform, and methanol were observed. Some strengthening of specific interactions of 1,7-diaza-18-crown-6 compared with 1,10-diaza-18-crown-6 is explained by differences in the conformational behavior of the isomeric molecules in solution.
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页码：154 / 157
页数：4
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