NOVEL ENHANCEMENT EFFECT OF A PROTON DONOR ON CHELATE EXTRACTION - EXTRACTION OF IRON(III) WITH ACETYLACETONE AND 3,5-DICHLOROPHENOL

被引：30

作者：

KATSUTA, S ^{[1
]}

IMURA, H ^{[1
]}

SUZUKI, N ^{[1
]}

机构：

[1] TOHOKU UNIV,FAC SCI,DEPT CHEM,SENDAI,MIYAGI 980,JAPAN

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES | 1992年 / 157卷 / 02期

关键词：

D O I：

10.1007/BF02047440

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Effect of 3,5-dichlorophenol (DCP) on the extraction of Fe(III) with acetylacetone (Hacac) in nonpolar organic solvents has been studied. It is found that a mixture of Hacac and DCP in heptane gives much higher extraction of Fe(III) than Hacac alone. Such novel enhancement effect is ascribable to the association of tris(acetylacetonato)iron(III) [Fe(acac)3] with DCP in the organic phase by hydrogen bonding. Association of Hacac with DCP has also been investigated and the intrinsic extraction equilibrium of Fe(III) is analyzed by using the equilibrium concentration of free Hacac and DCP. The association complexes are found to be Fe(acac)3.n DCP (n = 1, 2, 3) in heptane, and the overall association constants (beta(ass,n)) are determined to be log beta(ass, 1) = 3.41, log beta(ass,2) = 5.97 and log beta(ass, 3) = 7.50.

引用

页码：255 / 264

页数：10

共 10 条

[1] ROLE OF SOLVENT IN DISTRIBUTION OF ZINC-TTA CHELATE AND ADDUCT FORMATION WITH TBP [J].