Question

The ether that undergoes electrophilic substitution reaction is:
A) \[C{H_3}O{C_2}{H_5}\]
B) \[{C_6}{H_5}OC{H_3}\]
C) \[C{H_3}OC{H_3}\]
D) \[{C_2}{H_5}O{C_2}{H_5}\]

Answer 1

Hint: Try to recall that electrophilic substitution happens in many compounds containing benzene rings-the the arenes. Now, by using this you can easily find the correct option from the given ones.

Complete step by step solution:
It is known to you that the ions which love electrons or have a tendency to gain electrons are electrophiles. This property is shown by those species which are positively charged or have vacant p or d- orbital.
When in any reaction, a strong electrophile (more tendency to gain electrons) substitutes or replaces a comparatively weaker electrophile, then the reaction is termed as electrophilic substitution reaction.
Electrophilic substitution happens in many of the reactions of compounds containing benzene rings- the arenes.
Benzene is a planar molecule containing a ring of six carbon atoms each with a hydrogen atom attached.
Benzene resists addition reactions because that would involve breaking the delocalization of electrons and losing that stability.
We know that ether does not give the electrophilic substitution reaction. Only those ethers will give electrophilic substitution reactions which have benzene rings in their formula.
In the above-given options, only \[{C_6}{H_5}OC{H_3}\] has a benzene ring so it will give an electrophilic substitution.
Therefore, from above we can conclude that option B is the correct option for the given question.

Note: It should be remembered to you that benzene has delocalized electrons. Hence, it is electron-rich and as a result, is highly attractive to electrophiles.
Also, you should remember that when an electrophile attaches itself to a benzene ring, a carbocation intermediate is formed.