Aluminium monochloride
Aluminium monochloride, or chloridoaluminium is the metal halide with the formula AlCl. Aluminium monochloride as a molecule is thermodynamically stable at high temperature and low pressure only. This compound is produced as a step in the Alcan process to smelt aluminium from an aluminium-rich alloy. When the alloy is placed in a reactor that is heated to 1,300 °C and mixed with aluminium trichloride, a gas of aluminium monochloride is produced.
- 2 Al(alloy) + AlCl3(gas) → 3 AlCl(gas)
| Names | |
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| IUPAC name
Chloridoaluminium | |
| Other names
Aluminium(I) chloride | |
| Identifiers | |
3D model (JSmol) |
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CompTox Dashboard (EPA) |
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| Properties | |
| AlCl | |
| Molar mass | 62.43 g·mol−1 |
| Thermochemistry | |
Std molar entropy (S⦵298) |
227.95 J K−1 mol−1 |
Std enthalpy of formation (ΔfH⦵298) |
-51.46 kJ mol−1 |
| Related compounds | |
Related compounds |
aluminium monofluoride gallium monofluoride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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It then disproportionates into aluminium melt and aluminium trichloride upon cooling to 900 °C.
This molecule has been detected in the interstellar medium, where molecules are so dilute that intermolecular collisions are unimportant.
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