Organic Chemistry
Organic Chemistry
8th Edition
ISBN: 9781305580350
Author: William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher: Cengage Learning
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Chapter 8, Problem 8.22P

Following is a balanced equation for the allylic bromination of propene.

CH2==CHCH3 + Br2 h CH2==CHCH2Br + HBr

(a) Calculate the heat of reaction, ∆H 0, for this conversion.

(b) Propose a pair of chain propagation steps and show that they add up to the observed stoichiometry.

(c) Calculate the ∆H 0 for each chain propagation step and show that they add up to the observed ∆H 0 for the overall reaction.

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