For this reaction, a silver salt of an acid is treated with bromine in the presence of a non-polar solvent of CCl4, resulting in the formation of alkyl bromide/aryl bromide and CO2.
Substrate: Silver salt of an acid (RCOOAg)
Reagent: Bromine (Br2)
Solvent: CCl4 (non-polar medium: to prevent further reaction with solvent)