Cyclic voltammetric study of the complexation of Pb2+ ions by dibenzopyridino-18-crown-6 in some nitriles

被引：0

作者：

Chojnacka-Kalinowska, G

Kalinowski, MK

机构：

[1] Inst Precis Mech, PL-01796 Warsaw, Poland

[2] Warsaw Univ, Fac Chem, PL-02093 Warsaw, Poland

来源：

POLISH JOURNAL OF CHEMISTRY | 2004年 / 78卷 / 09期

关键词：

dibenzopyridino-18-crown-6; Pb2+ complexes; cyclic voltammetry; thermodynamics of complexation;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A cyclic voltammetric study of the interaction of Pb2+ ions with dibenzopyridino-18-crown-6 in acetonitrile, propionitrile, butyronitrile, benzyl cyanide and benzonitrile has been carried out at various temperatures. Stability constants of the resulting 1:1 complexes were found to decrease with increasing DN, the solvent donor number. The enthalpy and entropy of complexation were calculated from the temperature dependence of the stability constants; the complexes were enthalpy stabilized, but entropy destabilized in all the solvents under study. The relationships DeltaH(o) vs. DN and DeltaS(o) vs. DN were found.

引用

页码：1605 / 1610

页数：6

共 27 条

[1] Silver(I) complexes of the derivatized crown thioether ligands 3,6,9,12,15,18-hexathianonadecanol and 3,6,9,13,16,19-hexathiaicosanol. Determination of stability constants and the crystal structures of [Ag(19-aneS6-OH)][CF3SO3] and [Ag(20-aneS6-OH)][BF4] [J].