Which of the following alkyl halide is quickly hydrolysed by $S_{N} 1$ mechanism?

C H_{3} C l

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C H_{3} - C H_{2} - C l

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C H_{3} - C H_{2} - C H_{2} - C l

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(C H_{3})_{3} C C l

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Solution

The correct option is B $(C H_{3})_{3} C C l$
For $S_{N} 1$ mechanism, the intermediate step where carbocation is formed, is the rate determining step.

So, the reaction in which the carbocation formed is more stable, will be favored for $S_{N} 1$ mechanism.

$⟹$ More stable the carbocation, more is the rate of reaction.

Generally, rate of reaction follows the pattern : $3^{o} a l k y l h a l i d e > 2^{o} a l k y l h a l i d e > 1^{o} a l k y l h a l i d e$ .

Option D is correct.

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Similar questions

S_{N} 1

\begin{matrix} C H_{3} - & C H & - C H_{2} - C l | C H_{3} \end{matrix}

\begin{matrix} C H_{3} - C H_{2} - & C H & - C l | C H_{3} \end{matrix}

S_{N} 1

C l - C H_{2} - C H_{3} | C | C H_{3} - C H_{2} - C H_{2} - C l + I^{-} - -- \to D M F

S_{N} 2

c o n c . H C l :

(a) C H_{3} - C H_{2} - O H A n h y Z n C l_{2} / △ - -------- \to C H_{3} - C H_{2} - C l

(b) C H_{3} - C H_{3} | C | C H_{3} - C H_{2} O H A n h y Z n C l_{2} / △ - -------- \to C H_{3} - C H_{1} | C | C H_{3} - C H_{2} - C H_{3}

(c) C H_{3} - O H | C | C H_{3} - C H_{3} A n h y Z n C l_{2} / △ - -------- \to C H_{3} - C l | C | C H_{3} - C H_{3}

(d) C H_{2} = C H - C H_{2} - O H A n h y Z n C l_{2} / △ - -------- \to C H_{2} = C H - C H_{2} - C l

C H_{3} - C H_{2} - C H_{2} - C O - C l \to C H_{3} - C H_{2} - C H_{2} - C H O

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