Homo- and heteroleptic mercury(II) complexes with monoamino complexones in aqueous solution

被引：1
|
作者：
Kornev, V. I. [1 ]
Kardapol'tsev, A. A. [1 ]
机构：
[1] Udmurt State Univ, Izhevsk 426034, Russia
来源：
RUSSIAN JOURNAL OF COORDINATION CHEMISTRY | 2008年 / 34卷 / 08期
关键词：
D O I：
10.1134/S1070328408080022
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Reactions of mercury(II) with iminodiacetic (H(2)Ida), 2-hydroxyethyliminodiacetic (H(2)Heida), and nitrilotriacetic acids (H(3)Nta) were studied by spectrophotometry and pH potentiometry. The resulting complexes included [HgIda], [Hg(OH)Ida](-), [HgIda(2)](2-), [HgHeida], [Hg(OH)Heida](-), [Hg(Heida)(2)](2-), [HgNta](-), [HgNta(2)](4-), [Hg(Ida)Heida](2-)[Hg(Ida)Nta](3-), and [Hg(Heida)Nta](3-). The logarithms of their stability constants calculated for I = 0.1 (NaClO4) and T = 20 +/- 2 degrees C were 11.14 +/- 0.07, 20.33 +/- 0.08, 19.40 +/- 0.10, 11.42 +/- 0.04, 19.68 +/- 0.11, 18.48 +/- 0.09, 13.42 +/- 0.05, 20.80 +/- 0.08, 19.05 +/- 0.06, 20.64 +/- 0.11, and 20.53 +/- 0.16, respectively. The experimental data were analyzed in terms of the mathematical models that predict the existence of a wide spectrum of complex species in solution and allow one to consider only those species that are sufficient for accurate reproduction of the observed pattern.
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收藏
页码：564 / 569
页数：6
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