Questions
(A): –NO2 group is benzene ring deactivating and m - directing.
(R): NO2 group withdraws electron density from benzene ring and makes ortho and para positions more electron deficient than meta position.
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Correct option is A
- It decreases electron density at ortho and para position.
- In nitrobenzene, the nitro group attached to benzene ring electron withdrawing and it shows -R effect which deactivates the benzene ring toward electrophilic substitution.
- The resonating structure of nitrobenzene shows development of +ve charge in ortho and meta positions.
- As a result, the electron density at meta position is relatively higher than at the ortho and para position.
- Thus, substitution occurs at meta position.
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