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Which of the following groups is a weak -I effect?

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Question: Which of the following groups is a weak -I effect?

Options:

  1. -CH3
  2. -Cl
  3. -Br
  4. -I

Correct Answer: -CH3

Solution: 

The -CH3 group exhibits a weak -I effect as it is a weak electron-donating group.

Which of the following groups is a weak -I effect?

Practice Questions

Q1
Which of the following groups is a weak -I effect?
  1. -CH3
  2. -Cl
  3. -Br
  4. -I

Questions & Step-by-Step Solutions

Which of the following groups is a weak -I effect?
  • Step 1: Understand what -I effect means. The -I effect refers to the electron-withdrawing effect of certain groups in a molecule.
  • Step 2: Identify what a weak -I effect is. A weak -I effect means that the group does not strongly pull electrons away from the rest of the molecule.
  • Step 3: Look at the -CH3 group (methyl group). It is made of carbon and hydrogen atoms.
  • Step 4: Recognize that the -CH3 group is not very good at pulling electrons away. Instead, it can donate some electrons.
  • Step 5: Conclude that since -CH3 has a weak ability to withdraw electrons, it is classified as a weak -I effect.
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