Substituents on an aromatic ring can have several effects on electrophilic aroma
ID: 490290 • Letter: S
Question
Substituents on an aromatic ring can have several effects on electrophilic aromatic substitution reactions. Substituents can activate or deactivate the ring to substitution, donate or withdraw electrons inductively, donate or withdraw electrons through resonance, and direct substitution either to the ortho/para or to the meta positions. From the following lists, select the substituents that have the indicated property. The substituents are written as -XV, where X is the atom directly bound to the aromatic ring.Explanation / Answer
1) If we talk about column 1 - NHCOCH3 and CH3 releases electrons and activates the ring towards substitution.
While CF3 and NO2 withdraws electrons and deactivates ring.
2) in column no.2 COOH and SO3H withdraws electrons through resonance.while OCH3 and NH2 releases electrons.
3) here in column no.3 CH3 ,F , OH are O/P directing groups.while CN and COOH are meta directing groups.