Question

Benzyl amine is ........ basic than aniline while ethyl amine is ...... basis than diethyl amine in gaseous phase.

• A. More, less
• B. Less, more
• C. Less, less
• D. More, more

Answer 1

The correct option is A More, less

In gaseous phase, benzyl amine is more basic than aniline while ethyl amine is less basic than diethyl amine.
Benzyl amine is more basic due to localized lone pair of electron on nitrogen atom which increases the rate of donation of free pair of electron while aniline compounds have delocalized lone pair of electron which reduces basicity.
Ethyl amine is less basic than diethyl amine due to presence of less +I effect than in case of diethyl amine where +I effect is operating from two ethyl group.