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Which of the following groups shows +M effect?

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Question: Which of the following groups shows +M effect?

Options:

  1. -NO2
  2. -CN
  3. -OCH3
  4. -COOH

Correct Answer: -OCH3

Solution: 

The -OCH3 group shows +M effect as it donates electrons through resonance.

Which of the following groups shows +M effect?

Practice Questions

Q1
Which of the following groups shows +M effect?
  1. -NO2
  2. -CN
  3. -OCH3
  4. -COOH

Questions & Step-by-Step Solutions

Which of the following groups shows +M effect?
  • Step 1: Understand what +M effect means. +M effect refers to the +Mesomeric effect, where a group donates electrons through resonance.
  • Step 2: Identify the group in the question. The group we are looking at is -OCH3 (methoxy group).
  • Step 3: Analyze the -OCH3 group. The oxygen atom in -OCH3 has lone pairs of electrons that can be shared with the rest of the molecule.
  • Step 4: Determine if the -OCH3 group can donate electrons. Yes, it can donate electrons through resonance, which is characteristic of the +M effect.
  • Step 5: Conclude that the -OCH3 group shows +M effect because it donates electrons through resonance.
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