All the resonance forms for the sigma complexes that correspond to bromination of aniline at the ortho, meta and para positions are to be drawn. Concept introduction: Nitrogen atom of − NH 2 group in aniline contains a nonbonding pair of electrons. It is a strong activating group. It makes the aromatic ring more electron rich as compared to anisole. The sigma complex formed during the electrophilic substitution reaction is resonance stablised due to non bonding electrons of nitrogen. Aniline give ortho and para substituted products. To determine: All the resonance forms for the sigma complexes that correspond to bromination of aniline at the ortho, meta and para positions.

Question

11) In electrophilic aromatic substitution reactions the nitro group is: A) a m-director since it destabilizes the meta sigma complex more than the ortho, para. B) a m-director since it destabilizes the meta sigma complex less than the ortho, para. C) an o,p-director since it stabilizes the ortho, para sigma complex more than the meta. D) an o,p-director since it stabilizes the ortho, para sigma complex less than the meta. E) none of the above.

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Question

Chapter 17.6B, Problem 17.8P

Interpretation Introduction

Interpretation: All the resonance forms for the sigma complexes that correspond to bromination of aniline at the ortho, meta and para positions are to be drawn.

Concept introduction: Nitrogen atom of −NH2 group in aniline contains a nonbonding pair of electrons. It is a strong activating group. It makes the aromatic ring more electron rich as compared to anisole. The sigma complex formed during the electrophilic substitution reaction is resonance stablised due to non bonding electrons of nitrogen. Aniline give ortho and para substituted products.

To determine: All the resonance forms for the sigma complexes that correspond to bromination of aniline at the ortho, meta and para positions.

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