Aluminium monochloride

Aluminium monochloride

Names
IUPAC name Aluminium monochloride
Systematic IUPAC name Chloridoaluminium[1]
Other names Aluminium(I) chloride
Identifiers
CAS Number	13595-81-8
ChEBI	CHEBI:30131
ChemSpider	4514257
Jmol interactive 3D	Image
PubChem	5359282
InChI InChI=1S/Al.ClH/h;1H/q+1;/p-1 Key: IZMHKHHRLNWLMK-UHFFFAOYSA-M
SMILES [Al]Cl
Properties
Chemical formula	AlCl
Molar mass	62.43 g·mol^−1
Thermochemistry
Std molar entropy (S^o298)	227.95 J K^−1 mol^−1
Std enthalpy of formation (ΔfH^o298)	-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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Infobox references

Aluminium monochloride is the metal halide with the formula AlCl. 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]

2Al_{alloy} + AlCl_3{gas} → 3AlCl_{gas}

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.^[3]

References

1. "chloridoaluminium (CHEBI:30131)". Chemical Entities of Biological Interest (ChEBI). UK: European Bioinformatics Institute.
2. Totten, George E.; MacKenzie, D. Scott (2003). Handbook of Aluminum. CRC Press. ISBN 0-8247-0896-2.
3. J. Cernicharo, M. Guelin (1987). "Metals in IRC+10216 - Detection of NaCl, AlCl, and KCl, and tentative detection of AlF". Astronomy and Astrophysics 183 (1): L10–L12. Bibcode:1987A&A...183L..10C.