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Problem 6 - Olympiad
Which of the following is not a peroxide effect reaction?
A. Hydrogenation of alkynes
B. Addition of HBr to alkenes
C. Free radical halogenation of alkanes
D. Polymerization of ethylene
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Correct: A
The peroxide effect (anti-Markovnikov addition) only occurs in HBr addition to alkenes. Other options do not involve peroxide-induced radical mechanisms.