Reaction of N,N-dimethyl-N′-(2-hydroxybenzyl)ethylenediamine with copper(II) in the presence of surfactants

被引：2
|
作者：
Sal'nikov, YI [1 ]
Boos, GA
Ryzhkina, IS
Ganieva, ER
机构：
[1] Russian Acad Sci, Kazan Sci Ctr, AE Arbuzov Organ & Phys Chem Inst, Kazan, Tatarstan, Russia
[2] Kazan VI Lenin State Univ, Kazan 420008, Tatarstan, Russia
来源：
RUSSIAN JOURNAL OF GENERAL CHEMISTRY | 2005年 / 75卷 / 03期
基金：
俄罗斯基础研究基金会;
关键词：
Surfactant; Phenolate; Isopropyl Alcohol; Acidic Medium; Spectrophotometry;
D O I：
10.1007/s11176-005-0229-7
中图分类号：
O6 [化学];
学科分类号：
0703 ;
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 reversible arrow 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 similar to 5.5) compared to an aqueous solution of isopropyl alcohol (pH similar to 11). The apparent stability constants of the complexes increase in the presence of surfactants, especially of cetyltrimethylammonium bromide.
引用
收藏
页码：345 / 348
页数：4
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