Synthesis and thermal studies of solid state 2-chloro-benzylidenepyruvic acid and its compounds with sodium, aluminium (III), gallium (III) and indium (III) cations

Abstract

The synthesis of sodium 2-chlorobenzylidenepyruvate and its corresponding acid as well as binary, binary together with it's acid or hydroxo-2-chorobenzylidenepyruvate of aluminium (III), gallium (III) and indium (III), were isolated. Chemical analysis, thermogravimetry, derivative thermogravimetry (TG/DTG), simultaneous thermogravimetry-differential thermal analysis (TG-DTA) and X-ray powder diffractometry have been employed to characterize and to study the thermal behaviour of these compounds. The results provided information concerning the stoichiometry, crystallinity, thermal stability and thermal decomposition.

Synthesis, characterization and thermal studies on solid compounds of 2-chlorobenzylidenepyruvate of heavier trivalent lanthanides and yttrium(III)

“…Sodium 2-chlorobenzylidenepyruvate and its corresponding acid were synthesized following the same procedure described in the literature [17], with some modification as follows: an aqueous solution of sodium pyruvate (22 g per 50 mL) was added with continuous stirring, to 24 mL of 2-chlorobenzaldehyde (29 g). Sixty milliliters of an aqueous sodium hydroxide solution (18 m/v%) was slowly added while the reacting system was stirred and cooled in an ice-bath.…”

“…Preparation and investigation of several metal-ion complexes of phenyl-substituted derivatives of BP, have been carried out in aqueous solutions [8][9][10], and in solid-state [11][12][13][14][15][16][17][18][19]. In aqueous solutions these works reported mainly the thermodynamic stability (β 1 ) and spectroscopic parameters (ε 1max , λ max ), associated with 1:1 complex species, analytical applications of the ligands, e.g., in gravimetric analysis and as metallochromic indicators, while in the solid-state, the establishment of the stoichiometry and detailed knowledge of the thermal behaviour of the ligands and their metal ion compounds have been the main purposes of these studies.…”

Comparison of the dehydration kinetics of solid state compounds of 2-methoxybenzylidenepyruvate with some divalent metal ions

“…Several works have been accomplished with different metal ions starting from these syntheses, since this ligand forms complexes easily. The thermal behavior of these compounds has been evaluated thoroughly, especially by thermogravimetry (TG), differential thermal analysis (DTA) and differential scanning calorimetry (DSC) as well as X-ray powder diffractometry, infrared spectroscopy, which have been used to characterize these compounds [3][4][5][6][7][8][9].…”

Comparison of the dehydration kinetics of solid state compounds of 2-methoxybenzylidenepyruvate with some divalent metal ions

“…Several works have been accomplished with different metal ions starting from these syntheses, since this ligand forms complexes easily. The thermal behavior of these compounds has been evaluated thoroughly, especially by thermogravimetry (TG), differential thermal analysis (DTA) and differential scanning calorimetry (DSC) as well as X-ray powder diffractometry, infrared spectroscopy, which have been used to characterize these compounds [3][4][5][6][7][8][9].…”