Which of the following aromatic amines has lower pKb value than ammonia?(a) Benzylamine(b) Benzenamine(c) N-Methylbenzenamine(d) N,N-DimethylbenzenamineI got this question by my college director while I was bunking the class.Question is from Amines Chemical Reactions topic in portion Amines of Chemistry – Class 12

Which of the following aromatic amines has lower pKb value than ammoni

1.	Which of the following aromatic amines has lower pKb value than ammonia?(a) Benzylamine(b) Benzenamine(c) N-Methylbenzenamine(d) N,N-DimethylbenzenamineI got this question by my college director while I was bunking the class.Question is from Amines Chemical Reactions topic in portion Amines of Chemistry – Class 12
Answer» Correct option is (a) Benzylamine The explanation is: In aryl amines, the N atom is directly attached to the benzene ring. This makes the lone pair of N to be in conjugation with the benzene ring, thus making it less available for protonation. WHEREAS, benzylamine is a PRIMARY ARYLALKYL amine and has higher BASIC STRENGTH than ammonia.

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