Question
At low temperature phenol reacts with Br2 in CS2to form
Answer: Option B
:
B
In presence of non-polar solvent (CS2) the ionization of phenol is suppressed. The ring is slightly activated and hence mono substitution occurs with p-bromophenol as the major product.
On the other hand with water phenol forms 2, 4, 6-tribromophenol. (CS2)
In aqueous solution phenol ionizes to give phenoxide ion. Due to the presence of negative charge of
oxygen the benzene ring is highly activated and hence trisubstituted product is obtained.
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:
B
In presence of non-polar solvent (CS2) the ionization of phenol is suppressed. The ring is slightly activated and hence mono substitution occurs with p-bromophenol as the major product.
On the other hand with water phenol forms 2, 4, 6-tribromophenol. (CS2)
In aqueous solution phenol ionizes to give phenoxide ion. Due to the presence of negative charge of
oxygen the benzene ring is highly activated and hence trisubstituted product is obtained.
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