Multiple choice

The o- and p- directing groups is/are:

  1. – COCH3
  2. – SO3H
  3. – NR3+
  4. – OCH3
  5. – NO

  1. Only 2

  2. Only 3

  3. Only 4

  4. Both 1 and 3

  5. Both 3 and 4
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Monosubstituted benzene, when treated with an electrophile, undergoes electrophilic aromatic substitution reaction. Each reaction yields a disubstituted benzene as the product, which can be identified using the descriptors ortho, para and meta as products. Common ortho and para directing groups are:

  • OH, - OCH3, - NR2, - CH3, - NR2 etc. Common meta directing groups are:
  • NO, - SO3H, - COCH3, - CHO, - NO2, - CN, - NR3+ etc. Hence, only –OCH3 group is ortho and para directing.

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