Articulo
Spectroscopic investigations of iron(II) and iron(III) oxalates
Autor
D'Antonio, Maria C.
Wladimirsky, Alejandra
Palacios, Daniel
Coggiola, Liliana
González Baró, Ana Cecilia
Baran, Enrique José
Mercader, Roberto Carlos
Institución
Resumen
In an attempt to contribute to a better characterization of FeII and FeIII oxalate complexes, an investigation of their vibrational (infrared and Raman) and 57Fe-Mössbauer spectra was performed. It is shown that the two polymorphs, α and β, of FeC2O4.2H2O cannot be accurately differentiated with any of these spectroscopic methods, demonstrating the high structural similarity of these two crystalline forms. Partially deuterated samples of β-FeC2O4·2H2O were also investigated to improve the vibrational-spectroscopic analysis. In the case of Fe2(C2O4)3·4H2O, a structural model, derived from results of combined vibrational and Mössbauer data, could be proposed. The 298 K Mössbauer spectrum for this complex is discussed in detail for the first time. Facultad de Ciencias Exactas Centro de Química Inorgánica