Discussion Forum



1)

The acidic hydrolysis of ether (X)  shown below is fastest when

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A) one phenyl group is replaced by a methyl group

B) one phenyl group is replaced by a para-methoxyphenyl group

C) two phenyl groups are replaced by two para-methoxyphenyl groups

D) no structural change is made to X

Answer:

Option C

Explanation:

Plan  This problem can be solved by using the concept of stability of carbocation and SN1  reaction when two phenyl groups are replaced by two para methoxy group, carbocation formed will be more stable. As the stability of carbocation formed increases, rate of acidic hydrolysis increases.

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Hence, (c)  is the correct, choice