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Binding of hexacyanoferrate(II) by aliphatic amines in aqueous solution

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Abstract

The stability of hexacyanoferrate(II)-amine(methylamine, ethylenediamine, diethylenetriamine and tetraethylenepentamine) was determined potentiometrically. Species Fe(CN)6(A)H (j−4)j (A=amine) are formed in all the systems investigated, with j=1...n+2 (n=number of aminogroups). Some other complexes Fe(CN)6(A)iHj (with i>1) were also found. The stability of these complexes is fairly high: the full protonated amine species, show for the reaction Fe(CN)6 4- + HnAn+ = Fe(CN)6(A)Hn (n-4) an equilibrium constant given by logK=0.686+2.10n. Factors affecting the stability are discussed in comparison with similar systems, together with the importance of interferences.

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Authors and Affiliations

  1. Dipartimento di Chimica Inorganica, Analitica e Struttura Molecolare dell'Università, Salita Sperone 31, 98166, S. Agata di Messina, Italy

    Concetta De Stefano, Claudia Foti & Ottavia Giuffré

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  1. Concetta De Stefano
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  2. Claudia Foti
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  3. Ottavia Giuffré
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De Stefano, C., Foti, C. & Giuffré, O. Binding of hexacyanoferrate(II) by aliphatic amines in aqueous solution. J Solution Chem 25, 155–165 (1996). https://doi.org/10.1007/BF00972686

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  • DOI: https://doi.org/10.1007/BF00972686

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