Answer: 2,4,6-tribromophenol.
- A Bromobenzene in routine practice
- B 2,4,6-tribromophenol
- C Benzoic acid overall
- D Cyclohexanol in most cases
Correct answer: B. 2,4,6-tribromophenol
Explanation: Phenol undergoes electrophilic substitution to form 2,4,6-tribromophenol.
The phenoxide ion's negative charge spreads into the aromatic ring through resonance, lowering its energy and making phenol give up its proton more easily; an alkoxide ion (from a plain alcohol) has nowhere to delocalise the charge, making alcohols far less acidic.
Concept context
Oxygen-containing organic compounds. Understand the acidic nature of phenols, reactions of alcohols (dehydration, oxidation, esterification), and properties of ethers. Includes industrial applications and named reactions.