Question

why presence of electron withdrawing group at meta position does not increase the reactivity of halo arenes towards nuclephilic substitution reaction?

Answer 1

HEY DUDE!!!

THIS IS YOUR ANSWER

When an electron withdrawing group(Like NO2) is present on benzene ring, it withdraws electron from benzene ring due to resonance (Pi- LP conjugation),creating deficiency of electrons on ortho and para positions. Hence Nucleophile easily comes attacks the electron deficient site.

Answer 2

When an electron withdrawing group(Like NO2) is present on benzene ring, it withdraws electron from benzene ring due to resonance (Pi- LP conjugation),creating deficiency of electrons on ortho and para positions.Hence Nucleophile easily comes attacks the electron deficient site.

You can try it:Just draw a benzene ring with NO2 on top and draw resonating structures of it.

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