a-By drawing all resonance structures of the carbocation intermediates in the nitration of toluene illustrate explain why alkyl groups are ortho and para directing
b-Substituent consequence in substituted aromatic rings- Presume the major products of the subsequent reactions.
1. Nitration of bromobenene
2. Bromination of nitrobenzene
3. Chlorination of phenol
4. Bromination of aniline.