The decreasing order of the basic character o | vedclass

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Question

(A) The basicity of amines depends on the availability of the lone pair on the nitrogen atom and the stability of the conjugate acid formed. $1$. $C_2

Vedclass · Accepted Answer

$C_2H_5NH_2 > CH_3NH_2 > NH_3 > C_6H_5NH_2$

Vedclass · Answer

(A) The basicity of amines depends on the availability of the lone pair on the nitrogen atom and the stability of the conjugate acid formed. $1$. $C_2H_5NH_2$ (Ethylamine) is more basic than $CH_3NH_2$ (Methylamine) due to the greater $+I$ effect of the ethyl group,which increases electron density on the nitrogen atom. $2$. $NH_3$ (Ammonia) is less basic than aliphatic amines because aliphatic amines have electron-donating alkyl groups that stabilize the positive charge on the nitrogen in the conjugate acid. $3$. $C_6H_5NH_2$ (Aniline) is the least basic because the lone pair on the nitrogen atom is involved in resonance with the benzene ring,making it less available for protonation. Therefore,the correct decreasing order is $C_2H_5NH_2 > CH_3NH_2 > NH_3 > C_6H_5NH_2$.

The decreasing order of the basic character of the following amines and ammonia is:

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