Identify the major product formed in the foll | vedclass

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Question

(A) The given reactant is $2,3-dibromobutane$. The reaction is a debromination reaction,which typically proceeds via an $E2$ mechanism using zinc dust

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cis-but$-2-$ene

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(A) The given reactant is $2,3-dibromobutane$. The reaction is a debromination reaction,which typically proceeds via an $E2$ mechanism using zinc dust $(Zn)$ in an alcoholic solvent.In the given Fischer projection,the two bromine atoms are on the same side (erythro form). When this specific stereoisomer undergoes $E2$ elimination,the hydrogen and bromine atoms must be in an anti-periplanar conformation.For the erythro$-2,3-$dibromobutane,the anti-elimination of $Br_2$ leads to the formation of $cis-but-2-ene$ as the major product.Therefore,the correct option is $A$.

Identify the major product formed in the following debromination reaction:
$CH_3-CH(Br)-CH(Br)-CH_3 \xrightarrow{-Br_2} \text{Major product}$

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Identify the major product formed in the following debromination reaction:$CH_3-CH(Br)-CH(Br)-CH_3 \xrightarrow{-Br_2} \text{Major product}$