A set of three nucleophilic displacement reactions is shown below:CH3SOHCH3CH2CCH3SN1 reactionBrА, SOH %3D 100% CH,ОНВ, SOH 3 33% Cн,он, 67% H20С, SOH %3D 67% CH3ОН, 33% H20Which reaction (A, B, or C) proceeds the fastest?Which reaction (A, B, or C) proceeds the slowest?

Question
Asked Nov 25, 2019
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A set of three nucleophilic displacement reactions is shown below:
CH3
SOH
CH3CH2CCH3
SN1 reaction
Br
А, SOH %3D 100% CH,ОН
В, SOH 3 33% Cн,он, 67% H20
С, SOH %3D 67% CH3ОН, 33% H20
Which reaction (A, B, or C) proceeds the fastest?
Which reaction (A, B, or C) proceeds the slowest?
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A set of three nucleophilic displacement reactions is shown below: CH3 SOH CH3CH2CCH3 SN1 reaction Br А, SOH %3D 100% CH,ОН В, SOH 3 33% Cн,он, 67% H20 С, SOH %3D 67% CH3ОН, 33% H20 Which reaction (A, B, or C) proceeds the fastest? Which reaction (A, B, or C) proceeds the slowest?

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Expert Answer

Step 1

The replacement of any atom or group of atoms by a nucleophile is termed as nucleophilic substitution reaction.

 

Step 2

Unimolecular substitution reaction are those reactions in which the rate of reaction depends only on the concentration of one reactant species that is known as unimolecular reaction.

SN1 reaction occurs in two steps. The first step involves the formation of carbocation and second step involves nucleophilic attack on the intermediate formed.

The rate of reaction for unimolecular substitution reaction does not depends on the concentration of nucleophile or base but depends on the polarity of the solvent.

So, if the concentration of polar solvent is more then the reaction will proceed at a fast rate and if the concentration of polar solvent is less then the reaction will proceed at a slower rate.

Step 3

In the given reaction CH3OH behaves like a nucleophile and water as a solvent.

In case of reaction A, the concentration of CH3OH is 100 % that means there is no solvent therefore, the intermediate formed during the reaction will not get stabilized and hence the reaction will proceed at slow rate.

In case of reaction B, the concentration of CH3OH and H2O is 33 % and 67 % that means solvent is present in large amount  therefore, the intermediate formed during the reaction wil...

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