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Question

Which of the following is γ- elimination?


A

CH3CH2H|CHBr|CH2KOH(alc)−−−−− CH3CH2CH=CH2+HBr

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B

R2H|CCl R2C:

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C

CH2|BrCH2CH2|Br Zn dust−−− +Br2+Zn

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D

None of these

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Solution

The correct option is C

CH2|BrCH2CH2|Br Zn dust−−− +Br2+Zn


We know, all three reactions are γ - elimination. Now, γ - elimination is the Loss of 2 atoms or group of atoms from 2 bonds away (next to adjacent)αpositopn
It leads to formation of 3 - membered ring in this case.
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