Coordination compounds of chromium(III) with different complexones and citric acid in aqueous solutions

被引：7

作者：

Kornev, VI ^{[1
]}

Mikryukova, GA ^{[1
]}

机构：

[1] Udmurt State Univ, Izhevsk 426034, Russia

来源：

RUSSIAN JOURNAL OF COORDINATION CHEMISTRY | 2004年 / 30卷 / 12期

关键词：

Physical Chemistry; Aqueous Solution; Chromium; Edta; Inorganic Chemistry;

D O I：

10.1007/s11173-005-0058-6

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A spectrophotometric study of heteroligand chromium(III) complexes with iminodiacetic (H(2)Ida), N-methyliminodiacetic (H(2)Mida), N-(beta-hydroxyethyl)iminodiacetic (H(2)Heida), nitrilotriacetic (H(3)Nta), ethylenediaminetetraacetic (H(4)Edta), and citric acids (H(4)Cit) showed that complexation in ternary systems depends on the concentrations of the reagents and the pH of the medium. The resulting complexes were [Cr(HIda)(H(2)Cit)] [Cr(HMida)(H(2)Cit)], [Cr(HHeida.)(H(2)Cit)](-), [Cr(HNta)(H(2)Cit)](-), [Cr(HHeida)(H(2)Cit)](-), [Cr(HNta)(HCit)](2-), [Cr(Nta)(HCit)](3-), [Cr(HEdta)(HCit)](3-), and [Cr(Edta)(HCit)](4-). The logarithms of their stability constants are 41.97 +/- 0.47, 43.54 +/- 0.62, 42.32 +/- 0.62, 36.34 +/- 0.26, 43.70 +/- 0.25, 39.75 +/- 0.45, 32.93 +/- 1.56, 46.46 +/- 0.80, and 41.71 +/- 0.81, respectively (I = 0.1 (NaClO4)).

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页码：895 / 899

页数：5

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