Generation-stability and addition reactions of free radicals

Question

Answer the following questions.

Question 1) Write brief notes on:

(i) Free radical aromatic substitution,

(ii) Autoxidation

Question 2) Explain the generation, stability and addition reactions of free radicals.

Question 3) Write the mechanistic and stereochemical aspects of addition reactions involving electrophiles and nucleophiles.

Question 4) Write brief notes on:

(i) Free radical rearrangements,

(ii) Hydroboration,

(iii) Michael reaction

Question 5) Write short notes on:

(i) Witting reaction,

(ii) Benzoic condensation.

Question 6) Write the mechanism of Perkin reaction and Knoevenagel reactions with appropriate examples.

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

Question 8) Write detail notes on the following:

(i) The Saytzeff and Hofmann rules,

(ii) E₂ mechanism.