| Abstrakt: |
1.Isotopic and electron exchange was studied in the systems Fem+[Fe(CN)6]n-.2.The parameters of the spectra of iron within and outside the sphere, entering into ferri-ferro-cyanides, were refined by a combination of gamma resonance spectroscopy and the labeled atom method,3.In the system Fe2+-[FeIII(CN)6]3-, at a reagent ratio of 1:1, there is a rapid oxidation-reduction process with transfer of an electron from iron within the sphere to iron outside the sphere.4.In the presence of excess high-spin iron, at first the starting materials react in a 1:1 ratio, forming the soluble blue KFe3+[Fe(CN)6], and only then is there a slow replacement of potassium cations of the iron — cyanide complex by Fe3+ ions. If in this case the blue is produced from an excess of Fe3+ and the ferrocyanide ion [Fe(CN)6]4-, then at the second stage the initial high-spin ferri-eations enter into the reaction. If, however, the starting materials were Fe2+ ions (in excess) and the ferricyanide anion [FeIII ·(CN)6]3-, then first the stoichiometric amount of Fe2+ is rapidly oxidized by the [Fe(CN)6]3- anions, forming the soluble blue KFe3+[FeII(CN)6], and then the excess iron is gradully oxidized by atmospheric oxygen, giving an insoluble blue.5.For the systems Fe3++[FeII(CN)6]4-, where the Fe3+ ion is taken in excess, a slow isotopic exchange Fe3+ ? [Fe(CN)6]4- is detected, the occurrence of which necessitates the presence of Fe3+ ions in the system that are not contained in the insoluble and soluble blues. |
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