Problems and exercisesAromatic Compounds
1. Aromatic or not?
Which of these compounds are aromatic? a) cyclohexa-1,3-diene; b) toluene; c) pyridine; d) cyclooctatetraene; e) naphthalene; f) cyclohexene.
2. Addition versus substitution
Cyclohexene instantly decolorizes a bromine solution, but benzene does not react with bromine unless FeBr3 is added, and then it gives bromobenzene instead of a dibromide. Explain the difference.
3. Reagents and products
Write the main product of the reaction of benzene with: a) HNO3/H2SO4; b) Cl2/FeCl3; c) SO3/H2SO4; d) CH3COCl/AlCl3; e) (CH3)3CCl/AlCl3.