The products formed in the reaction of phenol with $\mathrm{Br}_2$ dissolved in $\mathrm{CS}_2$ at…

The products formed in the reaction of phenol with $\mathrm{Br}_2$ dissolved in $\mathrm{CS}_2$ at $0^{\circ} \mathrm{C}$ are
  1. $o$-bromo, $m$-bromo and $p$-bromophenols
  2. o-bromo and $p$-bromophenols
  3. 2,4,6-tribromo and 2,3,6-tribromophenols
  4. 2,4-dibromo and 2,6-dibromophenols

Solution

Phenol when treated with $\mathrm{Br}_2$ in the presence of non-polar solvent $\mathrm{CS}_2$, it gives only o- and $p$-bromophenols instead the trisubstituted products. Reason for the above observation is supression of phenoxide ion in non-polar solvent. Thus, we get only mono substituted products.
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Asked in: JEE-TOPICTESTS-CHEMISTRY

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