Ph-CH(Br)-CH_2-CH_2-Br xrightarrow[Delta]{Zn- | vedclass

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Question

(B) The reaction of $1,3$-dibromide with $Zn-Cu$ couple is a classic example of $1,3$-elimination.$Zn$ acts as a reducing agent,donating electrons to

Vedclass · Accepted Answer

Phenylcyclopropane

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(B) The reaction of $1,3$-dibromide with $Zn-Cu$ couple is a classic example of $1,3$-elimination.$Zn$ acts as a reducing agent,donating electrons to the carbon atom attached to the bromine.This leads to the formation of a carbanion intermediate at the $C-1$ position.This carbanion then performs an intramolecular nucleophilic substitution $(S_N2)$ on the $C-3$ carbon,displacing the second bromide ion.This results in the formation of a three-membered ring.The final product is phenylcyclopropane.

$Ph-CH(Br)-CH_2-CH_2-Br \xrightarrow[\Delta]{Zn-Cu} \text{Product}$. The product of the above reaction is:

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