In electrophilic aromatic substitution reactions a bromine substituent ________.
A) is a deactivator and a m-director
B) is a deactivator and an o,p-director
C) is an activator and a m-director
D) is an activator and an o,p-director
E) none of the above

Question

Quizplus · Accepted Answer

A bromine substituent is a deactivator due to its electron-withdrawing nature. It is also an o,p-director, meaning it directs incoming electrophiles to the ortho and para positions relative to itself. This is due to the presence of lone pairs on the bromine atom which can interact with the pi system of the aromatic ring through resonance. The lone pairs donate electron density to the ring, making the ortho and para positions more electron-rich and therefore more attractive to incoming electrophiles.

In Electrophilic Aromatic Substitution Reactions a Bromine Substituent ________