question_answer

Which of the following compounds will be more easily attacked by an electrophile?      [AIPMT 1999]

A)

B)       

C)

D)

Correct Answer: C

Solution :

[c]  is able to deactivate the benzene nucleus but show directive influence while  and  activate the benzene nucleus (order ) so, they show electrophilic substitution easily on o/p position in comparison to benzene.

Order of electrophilic substitution

Thus phenol will be most easily attacked by an electrophile. Order of electrophilic substitution