Synthesis, characterization and thermal study of solid mandelate of some bivalent transition metal ions in CO2 and N2 atmospheres

• Published in: Journal of thermal analysis and calorimetry Vol. 111; no. 1; pp. 57 - 62
• Main Authors: Gomes, D. J. C., Caires, F. J., Lima, L. S., Gigante, A. C., Ionashiro, M.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 2013; Springer
• Subjects: Analytical Chemistry; Chemistry; Chemistry and Materials Science; Coordination compounds; Exact sciences and technology; Inorganic Chemistry; Inorganic chemistry and origins of life; Measurement Science and Instrumentation; Physical Chemistry; Polymer Sciences; Preparations and properties; Bivalent transition metals; Mandelate; Thermal behaviour; CO; N; Differential scanning calorimetry; Divalent metal Complexes; Carbon dioxide; Thermogravimetry; Mandelic acid; Organic ligand; Transition metal Complexes; Operating conditions; Infrared spectrometry; Inert atmosphere; Hydroxyacid; Atmosphere; Thermal analysis; Chemical synthesis
• ISSN: 1388-6150; 1588-2926; 1572-8943
• DOI: 10.1007/s10973-011-2189-y

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 CO
2
and N
2
atmospheres. The results show that all the compounds were obtained in the anhydrous state and in agreement with the general formula ML
2
. 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.