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  • 1 Department of Inorganic and General Chemistry, Institute of Chemistry Marie Curie Skłodowska University 20-031 Lublin Poland
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The conditions of thermal decomposition of scandium(III) hemimellitate, trimellitate and trimezinate in air and nitrogen atmospheres have been studied. On heating, the benzene-tricarboxylates of Sc(III) decompose in two stages. First, the hydrated complexes lose crystallization water; heating in air finally yields Sc2O3, and heating in a nitrogen atmosphere Sc2O3 and C. The dehydration of the complexes is associated with strong endothermic effects. The decomposition of benzenetricarboxylates in air is accompanied by an exothermic effect and in nitrogen by an endothermic effect.

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