Structural and Spectroscopic Behavior of double Metal Oxalates from the first transition Metal Series

Abstract

A series of double metal oxalates of stoichiometry MM´(C2O4)2.4H2O (with MM´= MnCo, MnNi, MnZn, CoNi, CoCu, CoZn, NiCu, NiZn and CuZn have been prepared and characterized. Their structural behavior was investigated by means of X-ray powder diffractometry, showing a strong structural analogy to the orthorhombic, so-called beta-modification, of the related simple oxalato complexes of composition MC2O4.2H2O. The vibrational spectroscopic behavior of the double metal oxalates was investigated by infrared and Raman spectroscopy. The results clearly confirmed the close structural analogies between the MM´(C2O4)2.4H2O, alfa-MC2O4.2H2O and beta-MC2O4.2H2O series of complexes.