NDLI: Cationic lead(II) halide complexes in molten alkali-metal nitrate. Part 2.—A thermodynamic investigation of the chloride, bromide and iodide systems

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Journal of the Chemical Society, Faraday Transactions 1 Vol -79

Journal of the Chemical Society, Faraday Transactions 1 Vol -69

Cationic lead(II) halide complexes in molten alkali-metal nitrate. Part 2.—A thermodynamic investigation of the chloride, bromide and iodide systems

Content Provider	Royal Society of Chemistry (RSC)
Author	Bengtsson, Lars Holmberg, Bertil
Copyright Year	1989
Abstract	The complex formation between lead (II) ions and chloride, bromide and iodide ions in molten equimolar (K, Na) NO3 has been studied. The systems were investigated at four temperatures between 240 and 300 °C. The iodide system was only studied at one temperature, since I– is oxidized to I2 in melts rich in Pb(NO3)2. Halide-ion activities were measured in the systems (K+, Na+, Pb2+)–(NO–3, X–), X–= Cl–, Br– and I–, by means of Ag/AgX electrodes. The formation of PbX2, PbX+ and Pb2X3+ was observed. Special interest was focused on the formation of cationic complexes with anions as coordination centres. The thermodynamic parameters ΔH°mn and ΔS°mn have been evaluated for the chloride and bromide systems. The results are : ΔH°11=– 7.9 kJ mol–1, ΔS°11= 26.3 J K–1mol–1 for Pb2++ Cl –→ PbCl+; ΔH°11=–4.6 kJ mol–1, ΔS°11= 35.2 J K–1 mol–1 for Pb2++ Br–→ PbBr+; ΔH°21= 1.5 kJ mol–1, ΔS°21= 16.1 J K–1 mol–1 for PbCl++ Pb2+→ Pb2Cl3+; ΔH°21=–7.1 kJ mol–1, ΔS°21= 1.9 J K–1 mol–1 for PbBr++ Pb2+→ Pb2Br3+. The parameters are compared with previous literature data and recent results obtained from the lead (II) fluoride system in (K, Na)NO3(l).
Starting Page	317
Ending Page	329
Page Count	13
File Format	PDF
ISSN	03009599
Volume Number	85
Issue Number	2
Journal	Journal of the Chemical Society, Faraday Transactions 1
DOI	10.1039/F19898500317
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Iodide Chloride Fluoride Lead(II) nitrate PBX2 Bromide
Content Type	Text
Resource Type	Article
Subject	Chemistry

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Cationic lead(II) halide complexes in molten alkali-metal nitrate. Part 1.—A thermodynamic investigation of the fluoride system

Cationic lead(II) halide complexes in molten alkali-metal nitrate. Part 3.—The structure of Pb₂X³⁺ and the solvated Pb^II ion, determined by liquid X-ray scattering and raman spectroscopy

Molten salt synthesis of the lead titanate PbTiO₃, investigation of the reactivity of various titanium and lead salts with molten alkali-metal nitrites

Viscosities of molten alkali-metal bromides and iodides

Cadmium(II) chloride, bromide and iodide complexes with 4,4'-bipyridazine: when are diazine and halide bridges (in)compatible?

Lithium-selective phosphine oxide-based ditopic receptors show enhanced halide binding upon alkali metal ion coordination

Formation of uniform PbS quantum dots by a spin-assisted successive precipitation and anion exchange reaction process using PbX₂ (X = Br, I) and Na₂S precursors

Structural investigation of co-evaporated methyl ammonium lead halide perovskite films during growth and thermal decomposition using different PbX₂ (X = I, Cl) precursors

Transition-metal complexes of the 2,3-dipyridylquinoxalines. Part III. Cobalt(II), nickel(II), and copper(II) halide derivatives of 6-methyl-2,3-di-(2-pyridyl)quinoxaline and 6,7-dimethyl-2,3-di-(2-pyridyl)quinoxaline

Cationic lead(II) halide complexes in molten alkali-metal nitrate. Part 2.—A thermodynamic investigation of the chloride, bromide and iodide systems

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