Reaction of N,N-Dimethyl-N′-(2-hydroxybenzyl)ethylenediamine with Copper(II) in the Presence of Surfactants

被引：0
|
作者：
Yu. I. Sal’nikov
G. A. Boos
I. S. Ryzhkina
E. R. Ganieva
机构：
[1] Russian Academy of Sciences,Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center
[2] Kazan State University,undefined
来源：
Russian Journal of General Chemistry | 2005年 / 75卷
关键词：
Surfactant; Phenolate; Isopropyl Alcohol; Acidic Medium; Spectrophotometry;
D O I：
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中图分类号：
学科分类号：
摘要：
The protolytic properties of N,N-dimethyl-N′-(2-hydroxybenzyl) ethylenediamine (HL) and its complexation with copper(II) in the presence of cationic (cetyltrimethylammonium bromide) and nonionic (Triton X-100) surfactants were studied by pH-metry, spectrophotometry, and mathematical simulation of the equilibria. Cetyltrimethylammonium bromide affects the H2L2 ⇄ 2HL equilibrium. Along with the protonated monomeric and dimeric species, triprotonated tetrameric species were revealed in surfactant solutions, as in aqueous solutions of isopropyl alcohol. The surfactants affect the complexation of HL with Cu(II). The 1 : 2 complex with the phenolate form in solutions of cetyltrimethylammonium bromide is formed in a more acidic medium (pH ∼5.5) compared to an aqueous solution of isopropyl alcohol (pH ∼11). The apparent stability constants of the complexes increase in the presence of surfactants, especially of cetyltrimethylammonium bromide.
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页码：345 / 348
页数：3
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