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Q.
Which of the following would give Hofmann alkene?
Amines
Solution:
a. The oxidation of $3^{\circ}$ amine to amine oxide followed by Cope reaction on heating gives Hofmann alkene (less substituted)
b. (II) will not give Hoffmann alkene. Benzylic $H$ atom is more acidic due to (-I) effect of Ph. (II) would give
c. (III) will give Hofmann alkene $CH _2= CH _2$
d. (IV) will not give Hofmann alkene (Cope reaction). Same explanation as in (b) above
