Thermal reactions of lead(IV) chloride complexes in the solid state. Part IV. Thermolysis of alkali metal hexachloroplumbates

Ba̵zejowski, Jerzy; Szychlinski, J.; Windorpska, Krystyna

doi:10.1016/0040-6031(81)80240-7

Cited by 44 publications

(6 citation statements)

References 52 publications

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“…Several compounds of H2PbC16 with monoand divalent complex cations are also known [1]. Investigations of the thermal properties and thermochemistry of hexachloroplumbic acid derivatives were conducted earlier in this laboratory on the hexachloroplumbates of alkali metals [2] and numerous nitrogen-containing bases [3,4]. The present communication reports the results of an analogous study of two hexachloroplumbates of complex cations [Co(py),C12)2]PbCl 6 and the newly synthesized [Ru(dipy)a]PbC16, as well as the corresponding chloride salts.…”

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confidence: 99%

Thermal decompositions of [Co(py)4Cl2]2PbCl6 and [Ru(dipy)3]PbCl6

Szychlinski

Łubkowski

Błażejowski

et al. 1987

Journal of Thermal Analysis

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The thermal decompositions of [Co(py)4Clz]2PbCl 6 and [Ru(dipy)3]PbCl 6 were examined by dynamic thermoanalytical methods and under isothermal conditions permitting quantitative determination of some of the reaction products. A comparative study of the corresponding chloride salts was also performed. Both groups of compounds decompose with the liberation of chlorine and organic ligands (and H~O in the case of the hydrates of the chlorides), and the process is accompanied by the simultaneous transitions Pb(4+)---,Pb(2+) and Co(3+) --,Co(2 + ). The ruthenium complex salts initially decompose without a change in the oxidation state of the Ru atom, but upon thermal treatment of the hexachloroplumbate certain chlorination products of the organic ligands are formed.Hexachloroplumbic acid (H2PbC16) forms a large group of salt-like derivatives with numerous nitrogen-containing organic bases [1]. Among the hexachloroplumbates of metals, only the existence of the salts of potassium, rubidium and caesium has so far been proved. Several compounds of H2PbC16 with monoand divalent complex cations are also known [1]. Investigations of the thermal properties and thermochemistry of hexachloroplumbic acid derivatives were conducted earlier in this laboratory on the hexachloroplumbates of alkali metals [2] and numerous nitrogen-containing bases [3,4]. The present communication reports the results of an analogous study of two hexachloroplumbates of complex cations [Co(py),C12)2]PbCl 6 and the newly synthesized [Ru(dipy)a]PbC16, as well as the corresponding chloride salts.

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confidence: 99%

Thermal decompositions of [Co(py)4Cl2]2PbCl6 and [Ru(dipy)3]PbCl6

Szychlinski

Łubkowski

Błażejowski

et al. 1987

Journal of Thermal Analysis

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“…For a simple process, such as that shown by Eq. (1), the enthalpy change (A/-/~) can be evaluated on the basis of experimental a vs. T dependencies (a = extent of decomposition; T= temperature) and using Van't Hoff equation [13], namely:…”

Section: Resultsmentioning

confidence: 99%

Thermal analysis and thermochemistry of alkali metal hexachlorostannates

Janiak

Nikel

Błażejowski

1990

Journal of Thermal Analysis

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The thermal behaviour of alkali metal hexachlorostannates of general formula A2SnCI6 (,4 = Li, Na, K, Cs, Rb) has been studied by thermoanalytical methods (dynamic TG, DTG and DTA, and Q-TG). The compounds decompose upon heating with total (A = Li, Na) or partial (A = K, Rb, Cs) release of SnCI4 molecules to the gaseous phase. The enthalpies of the decomposition process have been evaluated on the basis of the Van't Hoff equation and using dynamic TG curves. The thermochemistry of the compounds was thoroughly examined particularly, with regard to the enthalpies of formation and crystal lattice energies, as well as enthalpy changes characterizing the dissociation process. These data revealed that stability of the compounds markedly increase with an increase in the size of alkali metal cation.

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“…The classical Arrhenius model, widely recommended for the description of reaction kinetics in the solid state [26], can be written in the form…”

Section: Kinetic Studiesmentioning

confidence: 99%