Allylic Radicals

Allylic Radicals - Allylic Radicals Allylic radicals form readily because they are more stable than ordinary primary secondary tertiary or vinyl

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Allylic Radicals Allylic radicals form readily because they are more stable than ordinary primary, secondary, tertiary, or vinyl radicals 1
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Chaper 15 2 Allylic Radicals Stabilized by resonance. Radical stabilities: 1 ° < 2 ° < 3 ° < 1 ° allylic. Substitution at the allylic position competes with addition to double bond. To encourage substitution, use a low concentration of reagent with light, heat, or peroxides to initiate free radical formation.
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Allylic Substitution Reaction of propene with bromine varies depending on reaction conditions At low temperature the halogen adds across the double bond At high temperature or at very low concentration of ha l ogen an allylic substitution occurs 3
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Can be performed at high temperature in the gas phase The reaction is a free radical chain reaction In the initiation step a low concentration of chlorine radical is produced In the first propagation step
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This note was uploaded on 12/10/2010 for the course CHE 179582 taught by Professor Rzayev during the Spring '09 term at SUNY Buffalo.

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Allylic Radicals - Allylic Radicals Allylic radicals form readily because they are more stable than ordinary primary secondary tertiary or vinyl

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