Chapter 3 full version.pptx

Endothermic or exothermic bond breaking dh kcalmol

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Endothermic or Exothermic Bond Breaking DH (kcal/mol) Bond Making DH (kcal/mol) π-bond 62 C-H 101 H-Br 88 C-Br 71 COST 150 GAIN 172 150 kcal/mol – 172 kcal/mol = –22 kcal/mol or exothermic Energy Cost of breaking bonds Gain of Energy from making bonds
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Reaction Coordinate Diagrams for Fast and Slow Exothermic and Endothermic Reactions
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Reactions in Chapter 4 name class subclass mechanism 1. Hydrohalogenation electrophilic addition hydro chlorin ation, hydro bromi nation, hydro iodin ation yes 2. Hydration electrophilic addition yes 3. Halogenation electrophilic addition bromin ation, chlorin ation yes 4. Hydrogenation electrophilic addition reduction [H] no 5. cis Di-hydroxylation oxidation [O] no 6. Oxidative cleavage oxidation [O] no 7. Epoxidation oxidation [O] no We will not cover every reaction in the textbook. Always refer to the “345 reactions summary” in the course materials folder in Blackboard. If the reaction has a “yes” under the mechanism column, you are expected to learn that mechanism .
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