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(D) The reaction is an electrophilic addition of $HBr$ to a conjugated diene $(2	ext{-methylbuta-1,3-diene})$ at low temperature $(-80^{\circ}C)$,whi

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$2-$bromo$-2-$methylbutane

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(D) The reaction is an electrophilic addition of $HBr$ to a conjugated diene $(2	ext{-methylbuta-1,3-diene})$ at low temperature $(-80^{\circ}C)$,which favors the kinetic product $(1,2	ext{-addition})$.$1$. The proton $(H^+)$ from $HBr$ attacks the terminal double bond to form the most stable carbocation.$2$. Protonation at the $C_1$ position leads to a tertiary allylic carbocation,which is more stable than the secondary allylic carbocation formed by protonation at the $C_4$ position.$3$. The bromide ion $(Br^-)$ then attacks the tertiary carbocation at the $C_2$ position to form the $1,2	ext{-addition}$ product.$4$. The final product $A$ is $2	ext{-bromo-2-methylbut-3-ene}$.

Predict the major product $A$ for the following reaction:
$2\text{-methylbuta-1,3-diene} + HBr (1 \text{ eq.}) \xrightarrow{-80^{\circ}C (1,2\text{-addition})} A$

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Predict the major product $A$ for the following reaction:$2\text{-methylbuta-1,3-diene} + HBr (1 \text{ eq.}) \xrightarrow{-80^{\circ}C (1,2\text{-addition})} A$