Synthesis, characterization and thermal behaviour of solid 2-methoxycinnamylidenepyruvate of some bivalent metal ions in CO2 and N2 atmospheres

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Published: Dec 27, 2010
DOI: https://doi.org/10.26850/1678-4618eqj.v35.4.2010.p55-61
Keywords:
bivalent metals, 2-methoxycinnamylidenepyruvate, thermal behaviour, CO2, N2

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Cláudio Teodoro de Carvalho
Universidade Federal da Grande Dourados, Dourados, Brasil.
Adriano Buzutti de Siqueira
Universidade Federal de Mato Grosso, Barra do Garças, Brasil.
https://orcid.org/0000-0002-4632-4014
Elias Yuki Ionashiro
Universidade Federal de Goiás, Instituto de Química, Goiânia, Brasil.
https://orcid.org/0000-0003-1997-8407
Massao Ionashiro
Universidade Estadual Paulista, Instituto de Química, Araraquara, Brasil.
https://orcid.org/0000-0003-2980-5841

Abstract

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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How to Cite
de Carvalho, C. T., de Siqueira, A. B., Ionashiro, E. Y., & Ionashiro, M. (2010). Synthesis, characterization and thermal behaviour of solid 2-methoxycinnamylidenepyruvate of some bivalent metal ions in CO2 and N2 atmospheres. Eclética Química, 35(4), 55–61. https://doi.org/10.26850/1678-4618eqj.v35.4.2010.p55-61
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Vol. 35 No. 4 (2010): Eclética Química
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Original articles
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