Ferric Chloride Complexes in Aqueous Solution: An EXAFS Study

Sammanfattning

A series of concentrated aqueous solutions of ferric chloride with different chloride:iron(III) ratios has been studied by means of EXAFS to determine the structure around the iron(III) ion of the dominating species in such solutions. The dominating species in dilute acidic aqueous solution of ferric chloride, at less than 1 mmol center dot dm(-3), are the hydrated iron(III) and chloride ions, while in concentrated aqueous solution and in solutions with an excess of chloride ions, up to 1.0 mol center dot dm(-3), it is the trans-[FeCl2(H2O)(4)](+) complex. Possible higher chloroferrate(III) or dimeric [Fe2Cl6] complexes at room temperature, as proposed in the literature, were not observed in any of the studied solutions in spite of an excess of chloride ions of 1 mol center dot dm(-3).

Nyckelord

EXAFS; Ferric chloride; Aqueous solution; trans-[FeCl2(H2O)(4)](+) complex

Publicerad i

Journal of Solution Chemistry
2018, Volym: 47, nummer: 5, sidor: 797-805
Utgivare: SPRINGER/PLENUM PUBLISHERS

SLU författare

• Persson, Ingmar

  • Institutionen för molekylära vetenskaper, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Fysikalisk kemi


Publikationens identifierare

DOI: https://doi.org/10.1007/s10953-018-0756-6

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/95754