Synthesis, characterization and thermal behaviour of solid 2- methoxycinnamylidenepyruvate of some bivalent metal ions in CO2 and N2 atmospheres
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Data
2010
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Resumo
Solid State M-2-MeO-CP compounds, where M stands for bivalent metals (Mn, Fe, Co, Ni, Cu and
Zn) and 2-MeO-CP is 2-methoxycinnamylidenepyruvate, were synthesized. Simultaneous thermogravimetry
and differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC), elemental analysis and
complexometry were used to establish the stoichiometry and to study the thermal behaviour of these
compounds in CO and N atmospheres. The results were consistent with the general formula: M(L) ·H O. In 2 2 2 2
both atmospheres (CO , N ) the thermal decomposition occurs in consecutive steps which are characteristic of 2 2
each compound. For CO atmosphere the final residues were: Mn O , Fe O , Co O , NiO, Cu O and ZnO, while 2 3 4 3 4 3 4 2
under N atmosphere the thermal decomposition is still observed at 1000 º C.
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Bivalent metals, 2-Methoxycinnamylidenepyruvate, Thermal behaviour, CO2 N2
Citação
CARVALHO, C. T. de et al. Synthesis, characterization and thermal behaviour of solid 2- methoxycinnamylidenepyruvate of some bivalent metal ions in CO2 and N2 atmospheres. Eclética Química, Araraquara, v. 35, n. 4, p. 55-61, 2010.