Extended x-ray absorption fine structure studies of the hydrolytic polymerization of iron(III). I. Structural characterization of the. mu. -dihydroxo-octaaquodiiron(III) dimer

Journal Article · Wed May 10 04:00:00 EDT 1978 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00478a074· OSTI ID:6673629

Morrison, T I ^[1]; Reis, Jr, A H; Knapp, G S; Fradin, F Y; Chen, H; Klippert, T E

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1. Argonne National Lab., IL

Aqueous solutions of Fe(III) hydrolyze over a range of pH forming dimer and polymer complexes. The existence of the dihydroxo-bridged Fe(III) dimer ..mu..-dihydroxo-octaaquodiiron ((H/sub 2/O)/sub 4/Fe(OH)/sub 2/Fe(OH/sub 2/)/sub 4/)/sup 4 +/ (I) in low pH solutions has been postulated to be the predominant species. Structural data, based on the extended x-ray absorption fine structure, demonstrates the existence of the postulated dimer I. The structure is proposed in which each Fe(III) is octahedrally coordinated to two OH/sup -/ ligands and to four H/sub 2/O molecules. Bond angles were evaluated for the postulated planar ring. (JSR)

• OSTI ID: 6673629
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 100:10; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AQUEOUS SOLUTIONS
CHEMICAL REACTIONS
COMPLEXES
DECOMPOSITION
DIMERIZATION
DIMERS
DISPERSIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
HYDROLYSIS
IONIZING RADIATIONS
IRON
IRON COMPLEXES
LYSIS
METALS
MIXTURES
PH VALUE
POLYMERIZATION
RADIATIONS
SOLUTIONS
SOLVOLYSIS
STRUCTURAL CHEMICAL ANALYSIS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS
X RADIATION