Which of the following alkyl halides is not hydrolyzed by S_N2 mechanism ?

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$C H_{3} B r$

$C H_{2} = C H C H_{2} B r$

$C_{6} H_{5} C H_{2} B r$

${(C H_{3})}_{3} C B r$

answer is D.

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Detailed Solution

Given data : It is given to identify which of the following alkyl halides is not hydrolyzed by S_N2 mechanism

Explanation

A nucleophilic substitution in which the rate-determining step has two components. Bond formation and breakage occur concurrently during - $S_{N} 2$ bimolecular processes.

The rate of the $S_{N} 2$ mechanism depends upon better innovation of nucleophiles and the steric hindrance and lower than the steric, and this is easy to attack.

Hence, the correct option (D). ${(C H_{3})}_{3} C B r$ .

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