SYNTHESIS, SPECTROSCOPIC AND STRUCTURAL CHARACTERIZATION OF PERIODATECOMPLEXES OF IRON(III)

The reaction of Fe(NO3)(3) . 9H(2)O with NalO(4) in aqueous acid solut ion gave brown [Fe(4)l(3)O(24)H(15)] and subsequent reaction with conc entrated alkalis formed M(n)[Fe(4)l(3)O(24)H(15-n)] (M = Li, Na, Kr Rb or Cs). The crystal structure of K6Na2[Fe(4)l(3)O(24)H(7)]. 14H(2)O h as been determined and shown to contain an Anderson-type anion compose d of seven edge-linked octahedra. In the crystal, studied a central Fe O6 group is surrounded by six disordered FeO6 and IO6 groups. All the prepared salts have been shown to contain a similar anion based upon s pectroscopic data. iron and iodine K-edge extended X-ray absorption fi ne structure data, and the Fe-57 Mossbauer spectra.