Notes_RadicalsLecture

Notes_RadicalsLecture - Radical Reactions Vollhardt:...

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Radical Reactions Vollhardt: Chapter 3, Sec2ons 3‐1 to 3‐9 Chapter 1±, Sec2on 1±‐13 Lecture Supplements: pg. ±9‐3± CFC, OWLS, PP: pg. 194‐±15
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Bromine Reactions Br 2 CH 3 Br Br + Br Br CH 3 Br 2 No Reaction Br 2 FeBr 3 Br + Br Br 2 Br 2 hv No Reaction Br How?
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General Radical Mechanism Chain Ini2a2on – Forma2on of the ±rst reac2ve intermediate Chain Propaga2on – Consump2on of a reac2ve intermediate and another molecule to give a new reac2ve intermediate Chain Termina2on – Consump2on of the reac2ve intermediate without forming another new reac2ve intermediate Radical Reac2ons are chain reac2ons One or more mechanism steps are repeated inde±nitely
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Bromination of an Alkyl Compound Fishhook arrow (half an arrow head) Used to show one electron movment Chain Ini2a2on Step: Br Br 2 Br light or heat Homoly2c Cleavage of the Bond
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Chain Propaga2on Steps: Br H + + H Br + Br Br Br Br +
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Chain Termina2on Step: Br Br Br Br
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Other Halide Radical Reactions I 2 Light No Reaction F 2 Light H F + F F F F F F F F F F F F Cl 2 Light Cl H Cl + Br 2 Light H Br + Br Kaboom!
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Notes_RadicalsLecture - Radical Reactions Vollhardt:...

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