QuestionOrganic / radical addition energetics (peroxide effect)
Identify the processes labelled as “P”, “Q” and “R” in the following table summarizing energetics of free radical addition of HX (X = Cl, Br or I) to propylene :

- (a) P is Endothermic, Q is Exothermic, and R is Exothermic
- (b) P is Exothermic, Q is Exothermic, and R is Exothermic
- (c) P is Endothermic, Q is Exothermic, and R is Endothermic
- (d) P is Exothermic, Q is Endothermic, and R is Exothermic
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