Synthesis, characterization and thermal study of solid mandelate of some bivalent transition metal ions in CO2 and N2 atmospheres
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Data
2013-01-01
Autores
Gomes, D. J C [UNESP]
Caires, F. J. [UNESP]
Lima, L. S. [UNESP]
Gigante, A. C. [UNESP]
Ionashiro, Massao [UNESP]
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Resumo
Solid state M-L, where M stands for bivalent transition metals (Mn(II), Fe(II), Co(II), Ni(II), Cu(II) and Zn(II)) and L is mandelate, were synthesized. Simultaneous thermogravimetry and differential scanning calorimetry, elemental analysis and complexometry were used to establish the stoichiometry and to study the thermal behaviour of these compounds in CO2 and N2 atmospheres. The results show that all the compounds were obtained in the anhydrous state and in agreement with the general formula ML2. The thermal decomposition of the compounds occurs in a single (Cu(II)), two (Ni(II)) three (Fe(II), Co(II)), four (Mn(II)) and five (Zn(II)) steps. The results also provided information concerning the ligand's denticity, thermal behaviour, final residues and identification of gaseous products evolved during the thermal decomposition of these compounds. © 2012 Akadémiai Kiadó, Budapest, Hungary.
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Bivalent transition metals, CO2, Mandelate, N2, Thermal behaviour, Complexometry, Denticity, Gaseous products, Information concerning, Thermal behaviours, Thermal study, Cobalt compounds, Complexation, Copper, Decomposition, Differential scanning calorimetry, Manganese, Manganese compounds, Metal ions, Stoichiometry, Thermogravimetric analysis, Zinc, Zinc compounds, Carbon dioxide
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Journal of Thermal Analysis and Calorimetry, v. 111, n. 1, p. 57-62, 2013.