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What will be the correct order of -I effect for the following elements?
F, Cl, Br, I

 

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Correct Order of –I Effect: F>Cl>Br>I

Explanation:

  • The –I effect refers to the electron-withdrawing inductive effect due to electronegativity.

  • More electronegative atoms pull electrons more strongly through sigma bonds.

  • Among halogens:

Halogen Electronegativity –I Effect
F 3.98 Strongest
Cl 3.16
Br 2.96
I 2.66 Weakest

So, as electronegativity decreases, the –I effect also decreases.

Therefore, the correct order of the –I effect is, F>Cl>Br>I.

Posted by

Saumya Singh

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