Abstract
The reaction of aqueous suspension of finely dispersed iron with one equivalent of (1-hydroxyethylidene) diphosphonic acid (H4L) results in poorly soluble iron(II) (1-hydroxyethylidene)diphosphate FeH2L·H2O. The reaction with two equivalents of the acid gives a water-soluble compound Fe(H3L)2, which undergoes disproportionation up to FeH2L·H2O and H4L. The reaction of a FeH2L·H2O aqueous suspension with an organic amine results in the dissolution of the complex. Heating the FeH2L·H2O aqueous suspension in a pressure reactor at 150°C in the presence of KF catalytic amounts causes the formation of a new crystal phase and X-ray-amorphous admixtures.
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Original Russian Text © V.V. Semenov, N.V. Zolotareva, B.I. Petrov, O.V. Novikova, E.N. Razov, A.V. Kruglov, 2018, published in Zhurnal Obshchei Khimii, 2018, Vol. 88, No. 3, pp. 482–486.
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Semenov, V.V., Zolotareva, N.V., Petrov, B.I. et al. Preparation of Iron(II) Water-Soluble Compounds Based on Iron(0), (1-Hydroxyethylidene)diphosphonic Acid, and Organic Amines. Russ J Gen Chem 88, 509–513 (2018). https://doi.org/10.1134/S1070363218030180
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DOI: https://doi.org/10.1134/S1070363218030180