The major product obtained by monobromination | vedclass

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(C) The starting material is $1$-methoxy-$3$-methylbenzene ($m$-cresol methyl ether). In this molecule,the $-OCH_3$ group is a strong ortho/para-direc

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$4-$bromo$-1-$methoxy$-3-$methylbenzene

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(C) The starting material is $1$-methoxy-$3$-methylbenzene ($m$-cresol methyl ether). In this molecule,the $-OCH_3$ group is a strong ortho/para-directing group due to its $+M$ effect,while the $-CH_3$ group is a weak ortho/para-directing group due to its $+I$ and hyperconjugation effects. The $-OCH_3$ group exerts a stronger directing influence than the $-CH_3$ group. Electrophilic substitution $(Br^+)$ will occur at the position most activated by the $-OCH_3$ group. The positions ortho to $-OCH_3$ are positions $2$ and $6$. Position $2$ is sterically hindered by the $-CH_3$ group at position $3$. Therefore,the electrophile attacks the position para to the $-OCH_3$ group,which is position $4$. This leads to the formation of $4$-bromo-$1$-methoxy-$3$-methylbenzene as the major product.

The major product obtained by monobromination of the following compound with $Br_2/ FeBr_3$ is:

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