COMPLEXATION OF H+ AND D+ BY CROWN ETHERS IN PROPYLENE CARBONATE

被引：5

作者：

BUSCHMANN, HJ ^{[1
]}

机构：

[1] UNIV GESAMTHSCH SIEGEN,W-5900 SIEGEN,GERMANY

来源：

POLYHEDRON | 1992年 / 11卷 / 05期

关键词：

D O I：

10.1016/S0277-5387(00)83304-5

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The complexation of H+ and D+ by different macrocyclic polyethers in propylene carbonate solutions has been studied by means of potentiometric and calorimetric titrations. The most stable complex for both ions is observed with 18-crown-6 (log K = 6.35, DELTA-H = 58.1 kJ mol-1, T-DELTA-S = -22.1 kJ mol-1). The smaller crown ether 15-crown-5 and the benzo substituted 18-crown-6 ethers form less stable complexes (15C5: log K = 3.32; B18C6: log K = 4.82, DB18C6: log K = 3.32). The stability constants and the thermodynamic parameters for the complexation of both ions are nearly identical.

引用

页码：559 / 561

页数：3

共 16 条

[1]

Bell R. P., 1973, PROTON CHEM, P226

[2]

BLASIUS E, 1981, TOP CURR CHEM, V98, P163

[3] COMPLEXATION OF PROTONS BY MACROCYCLIC POLYETHERS IN ACETONITRILE [J].