JEE Main · 2024 · Shift-IIeasyGOC-055

The set of meta directing functional groups from the following sets is:

General Organic Chemistry (GOC) · Class 11 · JEE Main Previous Year Question

Question

The set of meta directing functional groups from the following sets is:

Options
  1. a

    -CN, -NH₂, -NHR, -OCH₃

  2. b

    -NO₂, -NH₂, -COOH, -COOR

  3. c

    -NO₂, -CHO, -SO₃H, -COR

    ✓
  4. d

    -CN, -CHO, -NHCOCH₃, -COOR

Correct Answerc

-NO₂, -CHO, -SO₃H, -COR

Detailed Solution

Step 1: Defining Meta-Directing Groups Meta-directing groups are those that deactivate the o/po/p positions by withdrawing electron density via resonance (−R-R effect).

Step 2: Analyzing the Sets

  • Set C: \ce−NO2\ce{-NO2} (Nitro), \ce−CHO\ce{-CHO} (Aldehyde), \ce−SO3H\ce{-SO3H} (Sulfonic acid), \ce−COR\ce{-COR} (Ketone). All are strongly electron-withdrawing and meta-directing.
  • Other sets contain activating groups like \ce−NH2\ce{-NH2} or \ce−OCH3\ce{-OCH3} which are o/po/p directing.

Answer: (c)\boxed{\text{Answer: (c)}}

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