Thallium(I) chloride
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| Thallium(I) chloride | |
|---|---|
| Other names | thallium monochloride thallous chloride |
| Identifiers | |
| CAS number | [7791-12-0] |
| Properties | |
| Molecular formula | TlCl |
| Molar mass | 239.82 g/mol |
| Appearance | white, odorless crystalline |
| Density | 7.004 g/cm3, solid |
| Melting point |
430 °C |
| Boiling point |
720 °C |
| Solubility in water | insoluble |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Thallium(I) chloride is the chemical compound with the formula TlCl. This colourless solid is an intermediate in the isolation of thallium from its ores. Typically, a sulfuric acid solution of thallium(I) is treated with HCl to precipitate insoluble TlCl. This solid crystallizes in the caesium chloride motif.[1]
The low solubility of TlCl is exploited in chemical synthesis: treatment of metal chloride complexes with TlPF6, gives the corresponding metal hexafluorophosphate derivative. The resulting TlCl precipitate is separated by filtration of the reaction mixture. The overall methodology is similar to the use of AgPF6, except that Tl+ is non-oxidizing.
[edit] References
- ^ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.
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