Which of the following alkyl halides is hydrolysed by SN2 mechanism?

Question

Which of the following alkyl halides is hydrolysed by SN2 mechanism? (A)  C6H5CH2Br  (B)  CH3Br  (C)  CH2=CHCH2Br  (D)  (CH3)3CBr

Tardigrade Admin · Accepted Answer

SN2 mechanism involves the back side attack and formation of a transition state, thus less hindered alkyl halide readily undergoes SN2 mechanism. Among the given, CH3Br (methyl bromide) is less hindered, thus hydrolysed by SN2 mechanism.

Q. Which of the following alkyl halides is hydrolysed by $S_{N} 2$ mechanism?

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

$C H_{3} B r$

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

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

$S_{N} 2$ mechanism involves the back side attack and formation of a transition state, thus less hindered alkyl halide readily undergoes $S_{N} 2$ mechanism. Among the given, $C H_{3} B r$ (methyl bromide) is less hindered, thus hydrolysed by $S_{N} 2$ mechanism.

Q. Which of the following alkyl halides is hydrolysed by SN​2 mechanism?

C6​H5​CH2​Br

CH3​Br

CH2​=CHCH2​Br

(CH3​)3​CBr