Answer the following problems.

problem 1) prepare brief notes on:

(i) Free radical aromatic substitution,

(ii) Autoxidation

problem 2) describe the generation, stability and addition reactions of free radicals.

problem 3) prepare the mechanistic and stereochemical aspects of addition reactions involving electrophiles and nucleophiles.

problem 4) prepare brief notes on:

(i) Free radical rearrangements,

(ii) Hydroboration,

(iii) Michael reaction

problem 5) prepare short notes on:

(i) Witting reaction,

(ii) Benzoic condensation.

problem 6) prepare the mechanism of Perkin reaction and Knoevenagel reactions with appropriate exs.

problem 7) Describe the mechanism and orientation in pyrolytic eliminations.

problem 8) prepare detail notes on the following:

(i) The Saytzeff and Hofmann rules,

(ii) E₂ mechanism.