Spectroscopic investigations of iron(II) and iron(III) oxalates

Journal of the Brazilian Chemical Society

Wladimirsky, Alejandra¹  Mercader, Roberto C.¹  Baran, Enrique J.¹  Universidad Nacional de la Patagonia Austral, Río Gallegos, Argentina¹  D'Antonio, Maria C.¹  Centro de Química Inorgánica¹  González-Baró, Ana C.¹  Palacios, Daniel¹  Coggiolaa, Liliana¹  UTN-Unidad Académica Río Gallegos, Río Gallegos, Argentina¹  Universidad Nacional de La Plata, La Plata, Argentina¹ 

关键词: iron oxalates;    IR spectroscopy;    Raman spectroscopy;    Mössbauer;   

DOI  :  10.1590/S0103-50532009000300006

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

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.

【 授权许可】

Unknown