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SN2 Reaction Mechanism

Arrange the f...

Question

Arrange the following compounds in order of decreasing rate of hydrolysis for $S_{N} 1$ reaction:

A

I I > I I I > I V > I

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B

I V > I I I > I I > I

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C

I I I > I V > I I > I

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D

I > I I > I I I > I

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Solution

The correct option is A $I I > I I I > I V > I$
The order of decreasing rate of hydrolysis for $S_{N} 1$ reaction is $I I > I I I > I V > I$ .
Benzyl bromide has lowest rate of hydrolysis for $S_{N} 1$ reaction.
This rate increases when alkyl substituents are present.
The increase is maximum when methyl substituent is present.
The increase is minimum when isopropyl substituent is present.

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