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Which hydrogen in compound (E) is easily...

Which hydrogen in compound (E) is easily replaceable during bromination reaction in presence of light ?
`underset("(E)")(CH_(underset(delta)(3))-CH_(underset(gamma)(2))-underset(beta)(CH)=underset(alpha)(CH_(2)))`

A

`delta`- hydrogen

B

` beta`-hydrogen

C

`alpha` -hydrogen

D

`gamma` -hydrogen

Text Solution

Verified by Experts

The correct Answer is:
D
`CH_(3)-CH_(2)-CH=CH_(2)underset(hv)overset(Br_(2))toCH_(3)-overset(Br)overset(|)CH=CH=CH_(2)`
The reaction follows free radical substitution mechanism, in this case H is extracted from the position which forms most stable free radical i.e allylic position (`gamma`).
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