The Thermal Decomposition Reactions of Bivalent Metal Succinates in the Solid State

Abstract

The thermal decomposition reactions of MC4H4O4 (M : Mg(II), Co(II), Ni(II), Cu(II), Zn(II), and Pb(II)) in nitrogen or helium were investigated by means of TG-DTA, X-ray diffraction measurements, gas chromatography, and combustion analysis for carbon. The decomposition residues of the Mg and Zn salts were composed of the corresponding metal oxides and some carbon, while those of the Co, Ni, Cu, and Pb salts were composed of the corresponding metals and some carbon. H2, O2, CO, CO2, H2O, CH4, C2H2, C2H4, HCOOCH3, HCOOC2H5, CH3COOC2H5, C2H5COOC2H5, and (CH2CO)2O were identified as the gaseous decomposition products; the compositions of the gaseous mixtures varied a great deal with the metals. Possible reaction mechanisms were discussed mainly on the basis of the decomposition products.

Structure and thermal characterization of tris-thallium(III) glycollate

“…Table 4 shows that in general the activation energy (E) for the decarboxylation of TI(III) glycollate lies around 280 kJ mol-~, with an estimated uncertainty of + 4.77 kJ mol -1. These values are comparable with the generally accepted values of the activation energy of the decarboxylation reaction [1,3].…”

“…However, work on the thermal decomposition of heavy metal carboxylates started only a short time ago [3]. Recently, we reported on the thermal dehydration and decomposition of metal complexes of salicylic and nuclear substituted salicylic acids [4][5][6][7][8][9].…”

Structural and thermal decomposition characteristics of mixed-ligand complexes of Cu(II), Ni(II), Co(II) and Zn(II)

“…The plots of initiation, peak and completion temperature of thermal decomposition of anhydrous metal complexes against the negative heat of formation (Hf ~ [20] of the respective metal oxides (Fig. 4) exhibit interesting trends alongwith the rise of the values of -AHf ~ Such variation as reflected in Fig.…”

Thermal behaviour of succinic acid, sodium succinate and its compounds with some bivalent transitions metal ions in dynamic N2 and CO2 atmospheres

“…These papers are concerned with the thermal decomposition of bivalent succinates in the solid state [1], the thermal, spectral and magnetic studies of succinic acid and compounds of some transition metal ions [2], thermal dehydration of manganese (II) dicarboxylate hydrates [3], synthesis, properties and thermal decomposition of Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) succinates [4], a study of the thermal decomposition of Cu(II) and Zn(II) malonate, maleate and succinate complex [5] and a comparative study on the thermal decomposition of some transition metal carboxylates [6]. As continuation of our previous study on thermal behavior of succinic acid, sodium succinate and its compounds with some bivalent transition metal ions in air atmosphere [7], this paper deals with the thermal behavior and thermal decomposition of these compounds in dynamic N and CO atmospheres.…”