Final answer:
When toluene is treated with Br2 in the presence of an AIBI3 catalyst, a mixture of three compounds with the molecular formula C7H7Br is formed. One possible isomer is p-bromotoluene or 4-bromotoluene, and the other two isomers can be obtained by replacing a different hydrogen atom on the aromatic ring with a chlorine atom.
Step-by-step explanation:
When toluene is treated with Br2 in the presence of an AIBI3 catalyst, a mixture of three compounds with the molecular formula C7H7Br is formed. One possible isomer is p-bromotoluene or 4-bromotoluene, where the bromine atom is attached to the fourth carbon atom counting from the methyl group. The other two possible isomers can be drawn by replacing a different hydrogen atom attached to the aromatic ring with a chlorine atom.