Halogen Derivatives

TYPES OF QUESTIONS:

Halogenoalkanes

• State reagents/ conditions for the reactions that halogenoalkanes can undergo.
• Determine nucleophilic substitution products.
• Determine elimination products (using Saytzeff's rule).
• Write nucleophilic substitution mechanisms (S_N1 and S_N2).
• Suggest the (1) rate equation, (2) energy profile diagram and (3) stereochemistry involved for S_N1 and S_N2.
• Explain why methyl/ 1° RX undergoes S_N2 while 3° RX undergoes S_N1.
• Suggest test and/ or predict observations for identifying halogenoalkanes containing different halogens.
• Explain the difference in rates for the hydrolysis of halogenoalkanes containing different halogens.

Halogenoarenes

• Explain why halogenoarenes cannot undergo nucleophilic substitution.
• Determine products of electrophilic substitution on the benzene ring.