Study of heteronuclear complexation in Fe(II)-Fe(III)-Mn(II)-CH₃COOH-H₂O system

Abstract

Heteronuclear complexation in the Fe(II)–Fe(III)-Mn(II)CH3COOH-H2O system at 318 K and ionic strength of 1.0 mol/l was studied by the Clark-Nikolsky oxidation potential method. The formation of complexes of the composition: [FeL(H2O)5]2+; [FeLOH(H2O)4]+; [FeIIIМnIIL(H2O)3]4+; [FeIIIМnIIL(OH)2(H2O)9]2+; [FeL(H2O)5]+; [Fe(L)2(H2O)4]0; [Fe(L)(OH)2(H2O)3]-, two of which are heteronuclear. The conditions for forming and dominating coordination compounds in an aqueous solution are established.