What is the major product for the following reaction?

Question

Quizplus · Accepted Answer

The reaction involves the substitution of a bromine atom on a benzene ring by a methyl group in the presence of a strong Lewis acid catalyst, aluminum chloride (AlCl3). This is an example of Friedel-Crafts alkylation. The major product will be the one where the methyl group is attached to the benzene ring in the meta-position relative to the bromine atom. This is because the reaction proceeds through a carbocation intermediate, which is stabilized by the electron-withdrawing effect of the bromine atom. This makes the carbocation more likely to form at the meta position, where there is less electron density on the ring. Therefore, choice B is the correct answer as it shows the product with the methyl group added in the meta position.

What Is the Major Product for the Following Reaction