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- W4206099846 endingPage "642" @default.
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- W4206099846 abstract "Technologies for mass production require cheap and abundant materials such as ferrous chloride (FeCl2). The literature survey shows the lack of experimental studies to validate theoretical conclusions related to the population of ionic Fe-species in the aqueous FeCl2 solution. Here, we present an in situ X-ray absorption study of the structure of the ionic species in the FeCl2 aqueous solution at different concentrations (1-4 molL-1) and temperatures (25-80 °C). We found that at low temperature and low FeCl2 concentration, the octahedral first coordination sphere around Fe is occupied by one Cl ion at a distance of 2.33 (±0.02) Å and five water molecules at a distance of 2.095 (±0.005) Å. The structure of the ionic complex gradually changes with an increase in temperature and/or concentration. The apical water molecule is substituted by a chlorine ion to yield a neutral Fe[Cl2(H2O)4]0. The observed substitutional mechanism is facilitated by the presence of the intramolecular hydrogen bonds as well as entropic reasons. The transition from the single charged Fe[Cl(H2O)5]+ to the neutral Fe[Cl2(H2O)4]0 causes a significant drop in the solution conductivity, which well correlates with the existing conductivity models." @default.
- W4206099846 created "2022-01-25" @default.
- W4206099846 creator A5045931415 @default.
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- W4206099846 creator A5061047981 @default.
- W4206099846 date "2022-01-19" @default.
- W4206099846 modified "2023-09-25" @default.
- W4206099846 title "Structure and Population of Complex Ionic Species in FeCl2 Aqueous Solution by X-ray Absorption Spectroscopy" @default.
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- W4206099846 doi "https://doi.org/10.3390/molecules27030642" @default.
- W4206099846 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35163907" @default.
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