Thermoanalytical study of the complexes of 4-dimetilaminocinnamylidenepiruvate with manganese (II), cobalt (II), nickel (II), cupper (II), zinc (II) and lead (II), in the solid state

Abstract

Solid state compounds M-4-DMCP, where 4-DMCP is 4-dimethylaminocinnamylidenepyruvate and M represents Mn (II), Co (II), Ni (II), Cu (II), Zn (II) and Pb (II) were prepared. These compounds were studied by thermoanalitycal techniques: thermogravimetry (TG), derivative thermogravimetry (DTG), differential scanning calorimetry (DSC), X-ray diffraction powder patterns and complexometric titration with EDTA. From the results obtained by the complexometric titration with EDTA, TG, DTG and DSC curves, was possible to establish the hydration degree, stoichiometry and thermal stability of the prepared compounds.

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

“…Several metal-ion complexes of phenyl-substituted derivatives of cinnamylidenepyruvate, C H - 6 5 -(CH) -COCOO (CP), have been investigated in 4 aqueous solutions [1][2] and in the solid state [3][4][5][6][7][8][9][10][11]. These works reported the thermodynamic stability (â ), and spectroscopic parameters (å , ë ) in atmospheres have not been reported.…”

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

“…Several metal-ion complexes of phenyl-substituted derivatives of cinnamylidenepyruvate, C H - 6 5 -(CH) -COCOO (CP), have been investigated in 4 aqueous solutions [1][2] and in the solid state [3][4][5][6][7][8][9][10][11]. These works reported the thermodynamic stability (â ), and spectroscopic parameters (å , ë ) in 1 1max max aqueous solutions associated with 1:1 complex species.…”