What would be the major product(s)of the following reaction?
A)I and II
B)I,II,and III
C)III
D)I,II,and IV
E)None of these choices.

Question

What would be the major product(s)of the following reaction? 
A)I and II 
B)I,II,and III 
C)III 
D)I,II,and IV 
E)None of these choices.

Quizplus · Accepted Answer

The given reaction involves the reaction of an alkene with HBr in the presence of peroxide. This is an example of anti-Markovnikov addition of HBr to the alkene. The major products of this reaction are expected to be the ones where the hydrogen attaches to the carbon with fewer alkyl substituents. Hence, the major products would be I (1-bromo-3-methylcyclopentane), II (2-bromo-3-methylcyclopentane), and IV (2-bromo-2-methylcyclopentane). Product III would be a minor product since it involves the attachment of the bromine to a tertiary carbon.

What Would Be the Major Product(s)of the Following Reaction