Help
Add this page to your book
Show book (0 pages)
Suggest pagesAluminium iodide
| Aluminium iodide | |
|---|---|
 |
|
 |
|
|
Aluminium iodide |
|
|
Other names
Aluminium(III) iodide Aluminum iodide |
|
| Identifiers | |
| CAS number | 7784-23-8 (anhydrate), 10090-53-6 (hexahydrate) |
| PubChem | 82222 (anhydrate)  |
| ChemSpider | 74202 (anhydrate) |
| EC number | 232-054-8 |
| UN number | UN 3260 |
| Jmol-3D images | Image 1 |
|
|
|
|
| Properties | |
| Molecular formula | AlI3 |
| Molar mass | 407.69495 g/mol (anhydrous) 515.786 g/mol (hexahydrate) |
| Appearance | colorless powder but impure samples are often brown |
| Density | 3.98 g/cm3 (anhydrous) 2.63 g/cm3 (hexahydrate) |
| Melting point |
189.4 °C (anhydrous) |
| Boiling point |
360 °C, sublimes |
| Solubility in water | reacts violently (anhydrous) soluble (hexahydrate) |
| Solubility in alcohol, ether | soluble (hexahydrate) |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
|
| Infobox references | |
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. The hexahydrate is obtained from a reaction between metallic aluminum or aluminum hydroxide with hydrogen iodide or hydroiodic acid. 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
Aluminium iodide is employed as a catalyst 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]
- 3 AlI → AlI3 + 2 Al
An illustrative derivative of aluminium monoiodide is the cyclic adduct formed with triethylamine, AI4I4(NEt3)4.
[edit] Safety
Hydrolysis of aluminium triiodide will release some HI, which is corrosive. Lewis acids are skin irritants.
[edit] References
- ^ G. W. Watt, J. L. Hall (1953). Inorganic Syntheses. IV. pp. 117–119.
- ^ M. Gugelchuk (2004). Aluminum Iodide, in Encyclopedia of Reagents for Organic Synthesis (Ed: L. Paquette). New York: J. Wiley & Sons. doi:10.1002/047084289.
- ^ Dohmeier, C.; Loos, D.; Schnöckel, H. (1996). "Aluminum(I) and Gallium(I) Compounds: Syntheses, Structures, and Reactions". Angewandte Chemie International Edition 35: 129–149. doi:10.1002/anie.199601291.
|
|||||
 |
This inorganic compound-related article is a stub. You can help Wikipedia by expanding it. |
