Which of the following is an example of a -I group?

Which of the following is an example of a -I group?

Step 1: Understand what a -I group is. A -I group is an electron-withdrawing group that pulls electrons away from other parts of a molecule.
Step 2: Identify the halogens. The halogens are a group of elements that include Fluorine (F), Chlorine (Cl), Bromine (Br), and Iodine (I).
Step 3: Recognize that all halogens exhibit the -I effect. This means they all pull electrons towards themselves.
Step 4: Note that among the halogens, Fluorine (F) is the strongest -I group, meaning it pulls electrons the most effectively.
Step 5: Conclude that any of the halogens (-F, -Cl, -Br, -I) can be considered an example of a -I group.

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