Verified Solution • 2025–26 Session moderate

QJEEM24Ch89d1: JEE Main 2024 Chemistry - Class 11 JEEM24Ch89d1 Solution: Among the following, total number of meta directing functional…

Among the following, total number of meta directing functional groups is (Integer based)

−OCH3,−NO2,−CN,−CH3−NHCOCH3,−COR,−OH,−COOH,−Cl-\mathrm{OCH}_3,-\mathrm{NO}_2,-\mathrm{CN},-\mathrm{CH}_3-\mathrm{NHCOCH}_3, -\mathrm{COR},-\mathrm{OH},-\mathrm{COOH},-\mathrm{Cl}

Step-by-Step Verified Solution

Here's how to identify the meta-directing functional groups and determine the total :

Meta-Directing Groups:

  • Meta-directing groups are electron-withdrawing. They destabilize the intermediate carbocation that forms during electrophilic aromatic substitution at the ortho and para positions more than at the meta position.

  • Common meta-directing groups include:

  • -NO₂ (nitro)

  • -CN (cyano)

  • -COR (carbonyl groups, like ketones and aldehydes)

  • -COOH (carboxylic acid)

  • -SO₃H (sulfonic acid)

Identifying Meta-Directing Groups in the List:

  • -OCH₃: Ortho/para-directing (electron-donating)

  • -NO₂: Meta-directing

  • -CN: Meta-directing

  • -CH₃: Ortho/para-directing (electron-donating)

  • -NHCOCH₃: Ortho/para-directing (electron-donating)

  • -COR: Meta-directing

  • -OH: Ortho/para-directing (electron-donating)

  • -COOH: Meta-directing

  • -Cl: Ortho/para-directing (weakly deactivating)


Total Count:

There are four meta-directing groups in the list: -NO₂, -CN, -COR, -COOH

Answer:

The total number of meta-directing functional groups is 4.

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