Vibrational spectra of two bismuth(III) oxalates: Bi(OH)C2O4 and Bi2(C2O4)3⋅7H2O

Abstract

Se sintetizaron los dos oxalatos de Bi(III) del título y se registraron sus espectros de infrarrojo y Raman, los que resultaron ser bastante similares en su forma y ordenamiento espectral. Los espectros del Bi(OH)C2O4 resultaron consistentes con sus peculiaridades estructurales conocidas. En el caso del Bi2(C2O4)3⋅7H2O el análisis espectroscópico está de acuerdo con la presencia de grupos oxalato tetradentados fuertemente distorsionados, que generan un ordenamiento estructural tridimensional muy complejo, similar a los encontrados en los dos hidratos relacionados de estructuras conocidas, esto es Bi2(C2O4)3⋅6H2O y Bi2(C2O4)3⋅8H2O.

The two Bi(III) oxalates of the title were synthesized. Their infrared and Raman spectra were recorded and showed relatively similar spectral patterns. The spectra of Bi(OH)C2O4 are consistent with their known structural peculiarities. In the case of Bi2(C2O4)3⋅7H2O the spectroscopic analysis is in agreement with presence of highly distorted tetradentate oxalate groups, generating a complex three-dimensional structural arrangement similar to those found in the two related hydrates of known structures, i. e. Bi2(C2O4)3⋅6H2O and Bi2(C2O4)3⋅8H2O.