Difference in reaction of phenol with bromine in chloroform vs water is due to:
Alcohols, Phenols & Ethers · Class 12 · JEE Main Previous Year Question
Difference in reaction of phenol with bromine in chloroform vs water is due to:
- a
Hyperconjugation in substrate
- b✓
Polarity of solvent
- c
Free radical formation
- d
Electromeric effect of substrate
Polarity of solvent
Step 1: Reaction of Phenol with Bromine
- In Water: Phenol is highly activated and undergoes tri-substitution to form 2,4,6-tribromophenol. Water helps in ionizing phenol to phenoxide ion (strong activator).
- In Chloroform/: In a non-polar solvent, phenol does not ionize into the highly reactive phenoxide ion. It exists as phenol, which is less activated than the phenoxide ion.
Step 2: Conclusion The difference is primarily due to the polarity of the solvent, which influences the ionization of the substrate into the phenoxide ion.
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