Which is stronger -I group F or NO2 - Chemistry - Basic Principles of Organic Chemistry

Question

Which is stronger -I group? F or NO2?

Geetha · Accepted Answer

The order of -I effect is

NH3+

> NO2

> CN > 
SO3H

> CHO > CO > COOH > COCl > CONH2

> F > Cl > Br > I > OH > OR >
NH2

> C6H5

> H
Thus NO2 is showing more -I effect than
fluorine