Which one of the following reactions involves a free-radical intermediate?
a. Acid-catalyzed hydration of (CH3CH2)2C=CHCH3
b. Addition of hydrogenbromide to (CH3CH2)2C=CHCH3 in the presence of peroxides
c. Alkylation of sodium acetylide with bromoethane
d. Dehydration of (CH3CH2)3COH with H2SO4
e. E1 elimination of (CH3CH2)3CCl
This solution goes through reactions which involve free-radical intermediates within the context of organic chemistry.