Which of the following groups would be ortho, para directors in electrophilic aromatic substitution?
I. -CN
II. -SO₃H
III. -NH₂
IV. -OH
V. -Br

Question

Which of the following groups would be ortho, para directors in electrophilic aromatic substitution? I. -CN II. -SO₃H III. -NH₂ IV. -OH V. -Br

Quizplus · Accepted Answer

The groups that are ortho, para directors in electrophilic aromatic substitution are those that have lone pairs of electrons on the atom directly attached to the aromatic ring. I. -CN has a lone pair on the nitrogen atom and is a meta director. II. -SO₃H has no lone pairs on the sulfur or oxygen atoms and is a weak meta director. III. -NH₂ has a lone pair on the nitrogen atom and is a strong ortho, para director. IV. -OH has a lone pair on the oxygen atom and is a strong ortho, para director. V. -Br has no lone pairs on the bromine atom and is a weak meta director. Therefore, the groups that are ortho, para directors are III), IV), and V).

Which of the Following Groups Would Be Ortho, Para Directors