Identify the intermediate leads to the major product for the reaction of 2-methyl-2-butene with hydrogen bromide in the presence of peroxide.

Question

Quizplus · Accepted Answer

The reaction proceeds by the anti-Markovnikov addition of HBr to 2-methyl-2-butene in the presence of peroxide. The first step involves the formation of a radical intermediate (I) via homolytic cleavage of the peroxide. This intermediate then attacks the double bond of the alkene, leading to the formation of the allylic radical II. The hydrogen bromide then adds to this radical to yield III, which is the final radical intermediate before recombination of the two radicals to form the major product (IV). Therefore, the correct intermediate corresponding to the major product is II.

Identify the Intermediate Leads to the Major Product for the Reaction