Potentiometric Studies on Nickel(II), Copper(II) and Zinc(II) Metal Complexes with New Schiff Bases Containing Cyclobutane and Thiazole Groups in 60% Dioxane-Water Mixture

被引：0

作者：

Altun, Yueksel ^{[1
]}

Koeseoglu, Fitnat ^{[1
]}

Demirelli, Havva ^{[1
]}

Yilmaz, Ibrahim ^{[2
]}

Cukurovali, Alaattin ^{[2
]}

Kavak, Nusret ^{[1
]}

机构：

[1] Gazi Univ, Fac Gazi Educ, Dept Chem, Ankara, Turkey

[2] Firat Univ, Fac Arts & Sci, Dept Chem, TR-23169 Elazig, Turkey

来源：

JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY | 2009年 / 20卷 / 02期

关键词：

cyclobutane; thiazole; protonation constants; stability constants; ACID DISSOCIATION-CONSTANTS; CRYSTAL-STRUCTURE; 2,4-DISUBSTITUTED THIAZOLES; SOLVATOCHROMIC PARAMETERS; ANTIMICROBIAL ACTIVITY; ZN(II) COMPLEXES; CU(II); NI(II); LIGAND; CO(II);

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The acid-base equilibria of Schiff bases containing cyclobutane and thiazole functional groups and their copper(II), nickel(II) and zinc(II) complexes were investigated potentiometrically in 60% dioxane-water media at 25.0 +/- 0.1 degrees C and I = 0.10 mol L-1 NaClO4. The values of the protonation constants determined in this study, logK(OH), logK(NH(1)) and logK(NH(2)), are related to the protonation of the phenolate oxygen atom, the nitrogen atom on the thiazole ring and the imine nitrogen atom, respectively. The variation of the protonation constants of the Schiff bases was interpreted on the basis of structural factors. The Schiff bases form stable complexes with copper(II), nickel(II) and zinc(II) metal ions. There was not a meaningful correlation between the basicity of the Schiff bases and the stability constants of their complexes. Complex stabilities follow the trend copper(II) > nickel(II) > zinc(II), which is in agreement with the Irving-Williams series.

引用

页码：299 / 308

页数：10

共 68 条

[1] Crystal structure of 4-(1-methyl-1-mesitylcyclobutane-3-yl)-2-aminothiazole [J].