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Why is it necessary to perform the competing nucleophiles reactions under acidic conditions?

Why is it necessary to perform the competing nucleophiles reactions under acidic conditions?

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When the nucleophilic substitution reactions are carried , the -OH group of the alcohol behaves as a poor leaving group , due to which it is difficult to remove the group from the alcohol.

When the reactions are performed in the acidic conditions , the alcohol gets protonated by the acid , and its -OH group (poor leaving group) changes into H2O (good leaving group).

So the leaving group leaves the compound easily and the reactions are performed easily , and hence the competing nucleophile reactions are carried out under acidic conditions.

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