11. (24 pts) (a) Similar to alkanes, hydrogen gas can undergo radical bromination according to the reaction below. Propose a chain-reaction mechanism for this reaction, including an initiation step, propagation steps, and two plausible termination steps. The homolytic bond dissociation energy for Br-Br is 46 kcal mole", for H-Br is 88 kcal-mole and for H-H is 104 kcal-mole. hv Н-Н + Br-Br 2 Н-Br (b) Calculate the overall AH for the above propagation steps (show all work).

11. (24 pts) (a) Similar to alkanes, hydrogen gas can undergo radical bromination according to the reaction below. Propose a chain-reaction mechanism for this reaction, including an initiation step, propagation steps, and two plausible termination steps. The homolytic bond dissociation energy for Br-Br is 46 kcal mole", for H-Br is 88 kcal-mole and for H-H is 104 kcal-mole. hv Н-Н + Br-Br 2 Н-Br (b) Calculate the overall AH for the above propagation steps (show all work).

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter8: Haloalkanes, Halogenation, And Radical Reactions

Section: Chapter Questions

Problem 8.21P

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