Highly Effective Extraction of Iron(III) with 4-Isopropyltropolone in Nonpolar Solvents Containing 3,5-Dichlorophenol as a Synergist
作者： Hisanori IMURA , Ken-ichiro ISHIMORI , Kousaburo OHASHI
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摘要: A great enhancement in the extraction of iron(III) with 4-isopropyltropolone (Hipt) has been observed upon addition 3,5-dichlorophenol (DCP) as a hydrogen-bond donor, and highly efficient synergistic system for was presented using nonpolar solvents such heptane cyclohexane. An equilibrium study demonstrated formation adduct complexes not only chelate, Fe(ipt)3·nDCP (n = 1 - 3), but reagent, Hipt·nDCP 1, 2). The constants (βM,n [Fe(ipt)3·nDCP]org/[Fe(ipt)3]org[DCP]orgn, βH,n [Hipt·nDCP]org/[Hipt]org[DCP]orgn) corresponding were determined evaluated by comparing those acetylacetone (Hacac). values obtained Fe(ipt)3 Hipt larger than Fe(acac)3 Hacac, respectively, suggesting higher accepting power basicity former ligand.
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