Abstract
The thermal decomposition of molybdenum(V) thioglycolate, having the composition [Mo 2(L) 5(H 2O) 2] (H 2L = CH 2SHCOOH, thioglycolic acid), has been studied in argon, air and oxygen atmospheres in the 300–900 K region by TG and DTA methods. The results indicate a simultaneous gradual dissociation of ligand along with the removal of water molecules, without exhibiting any distinct steps in the TG curve. It is interesting to find that the compound decomposes in argon atmosphere to amorphous Mo metal as an end product at about 700 K, which was identified from its X-ray photoelectron and EPR spectra (conduction electrons), and XRD. The end product obtained in air or oxygen atmospheres appears to be a non-stoichiometric molybdenum oxide. A scheme for the thermal dissociation of the compound in argon atmosphere is discussed by combining the TG and DTA data.
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