Abstract
A new Mo(VI) oxalato complex Na 2[MoQ 3(C 2O 4)] · 3 H 2O(SMO) is prepared and characterized by chemical analysis and IR spectral studies. Thermal decomposition studies were made using TG and DTA techniques. The dehydration takes place in two stages, two moles of water being lost in the first stage between 80 and 115°C and the third being lost in the second stage between 115 and 170°C. The anhydrous SMO is stable up to 275°C and thereafter decomposes in two stages. The first stage extends up to 335°C to give an intermediate oxalate carbonate with the tentative composition Na 6[Mo 3O 10(C 2O 4)(CO 3)] which decomposes in the second stage between 335 and 450°C to give the end product, sodium molybdate. The end product was characterized by chemical analysis, IR and X-ray studies. The SMO is also found to be a crystalline compound.
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