Aluminium monobromide is a chemical compound with the empirical formula AlBr. It forms from the reaction of HBr with Al metal at high temperature. It disproportionates near room temperature:
6/n "[AlBr]n" → Al2Br6 + 4 AlThis reaction is reversed at temperatures higher than 1000 °C.
A more stable compound of aluminium and bromine is aluminium tribromide.
References
Aluminium monobromide Wikipedia(Text) CC BY-SA