Q15 / 150 · MHT CET 2012 · Chemistry

Which of the following group is sharp ortho and para directive?

  • A
    $-\mathrm{C}_{6} \mathrm{H}_{5}$
  • Correct answer
    B
    $-\mathrm{OH}$
  • C
    $\mathrm{CH}_{3}$
  • D
    $-\mathrm{Cl}$

Solution

All the groups are $o$ - and $p$ -directive. But in -OH group, lone pair of electron present at $o$ -atom, increases electron density for electrophile at $o^{-}$ and $p$ -positions. Thus, it is sharp $o$ - and $p$ - directive. Figure

Hence, the correct answer is option: 'B'.

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