Abstract
Solid state M-L compounds, were M stands for bivalent Mn, Fe, Co, Ni, Cu, Zn and L is pyruvate, have been synthesized. Thermogravimetry and derivative thermogravimetry (TG/DTG), differential scanning calorimetry (DSC), X-Ray powder diffractometry, infrared spectroscopy, elemental analysis, and complexometry were used to characterize and to study the thermal behaviour of these compounds. The results led to information about the composition, dehydration, ligand denticity, and thermal decomposition of the isolated compounds.
Highlights
ExperimentalInvestigations on pyruvic acid (HPy), as well as compounds derivatives of HPy, have been carried out in biological science researches
In aqueous solutions the formation of some metal ions complexes with pyruvic acid in ratio of metal: ligand 1:1 and 1:2 have been established by the spectroscopic method [1,2,3]; the stability constants and thermodynamic functions of complexes formation of lanthanides with pyruvic acid: ∆G, ∆H, ∆S, have been determined [4]
Aqueous solution of sodium pyruvate 0.8 mol L-1 was made by direct weighing of the solid salt
Summary
ExperimentalInvestigations on pyruvic acid (HPy), as well as compounds derivatives of HPy, have been carried out in biological science researches. The aim of this work has been to obtain bivalent metal pyruvates in solid state and to investigate by means of complexometry, elemental analysis, X-Ray powder diffractometry, infrared spectroscopy, thermogravimetry (TG) and differential scanning calorimetry (DSC).
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