Aluminium iodide
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| Aluminum iodide | |
|---|---|
| Image:Aluminum iodide.jpg | |
| General | |
| Other names | Aluminium(III) iodide Aluminum triiodide |
| Molecular formula | AlI3 |
| Molar mass | 407.695 |
| Appearance | colorless powder but impure samples are often brown |
| CAS number | [7784-23-8] |
| Properties | |
| Density and phase | 3.98 g/cm3, solid |
| Solubility | decomposes in water, alcohols soluble in carbon disulfide |
| Melting point | 191 °C |
| Boiling point | 360 °C |
| Vapour Pressure | 1 mm at 178 °C |
| 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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Aluminium iodide is any chemical compound containing only aluminium and iodine. Invariably, the name refers to a compound of the composition AlI3, formed by the reaction of aluminium and iodine[1] or the action of HI on Al metal. As for the related chloride and bromide, AlI3 is a strong Lewis acid and should be protected from the atmosphere.
Contents |
[edit] Applications in organic synthesis
Aluminum iodide is employed to break certain kinds of C-O and N-O bonds. It cleaves aryl ethers and deoxygenates epoxides.[2]
[edit] Aluminium(I) iodide
The name "aluminium iodide" is widely assumed to describe the triiodide or its dimer. In fact, a monoiodide also enjoys a role in the Al-I system, although composition AlI is unstable at room temperature with respect to the triiodide[3]
- 6 AlI → Al2I6 + 4 Al
An illustrative derivative of aluminium monoiodide is the cyclic adduct formed with triethylamine, AI4I4(NEt3)4.
[edit] Safety
Hydrolysis aluminum triiodide will release some HI, which is corrosive. Lewis acids are skin irritants.
[edit] References
- ^ G. W. Watt, J. L. Hall "Aluminum Iodide" Inorganic Syntheses, 1953, Volume IV, pages 117-119
- ^ M. Gugelchuk "Aluminum Iodide" in Encyclopedia of Reagents for Organic Synthesis (Ed: L. Paquette) 2004, J. Wiley & Sons, New York. DOI: 10.1002/047084289.
- ^ “Aluminum(I) and Gallium(I) Compounds: Syntheses, Structures, and Reactions” Dohmeier, C.; Loos, D.; Schnöckel, H. Angewandte Chemie International Edition in English (1996) Volume 35, Pages 129 - 149.
[edit] External links
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