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When aniline is treated directly with an excess of aqueous bromine (), a voluminous white precipitatAmines Chemistry Question

Question

When aniline is treated directly with an excess of aqueous bromine ($Br_2/H_2O$), a voluminous white precipitate forms rapidly. How many bromine atoms are incorporated into one molecule of this major organic product?

Answer: 3

💡 Solution & Explanation

The $-NH_2$ group in aniline is a very powerful activating and ortho/para-directing group. Direct bromination using aqueous bromine cannot be stopped at the monosubstitution stage. The reaction proceeds until all active positions are substituted, yielding 2,4,6-tribromoaniline as a white precipitate, which contains exactly 3 bromine atoms.

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