Chap12 - Reactions of Alkanes: Chapter 12 Radicals Chapter...

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Chapter 12 1 Reactions of Alkanes: Reactions of Alkanes: Chapter 12 Chapter 12 Radicals Radicals
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Chapter 12 2 Contents of Chapter 12 Reactivity Considerations Chlorination and Bromination of Alkanes Reactivity–Selectivity Principle Radical Substitution of Benzylic and Allylic Hydrogens Stereochemistry of Radical Substitution No Radical Reactions in Biological Systems
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Chapter 12 3 Radicals Sources include: Hydrogen peroxide Alkyl peroxides Light causes homolysis of the weak O-O bond
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Chapter 12 4 Homolysis produces radicals , which are very reactive species Heterolytic bond cleavage or heterolysis Homolytic bond cleavage or homolysis H Br H + + Br H Br H + Br
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Chapter 12 5 Radical Chain Reactions Initiation turns stable species into radicals by breaking a bond.
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Chapter 12 6 Radical Chain Reactions Propagation causes products to form without resulting in net consumption of radicals. (production = consumption)
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This note was uploaded on 12/30/2011 for the course CHEM 2261 taught by Professor Crowe during the Fall '08 term at LSU.

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Chap12 - Reactions of Alkanes: Chapter 12 Radicals Chapter...

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