1.

Which of the following is the least basic amine ?

Answer»

ETHYL amine
Diethyl amine
Aniline
Benzyl amine

Solution :Basicity of amines is DUE to the availability of electron density on N atom for protonation. Presence of ALKYL group In alkyl amines increases the electron density on N-atom by virtue of +I effect. However, aniline is less basic as phenyl group exerts -I effect, i.e., it WITHDRAWS electron resulting i lower avaliability of electron on nitrogen for protonation.


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