The correct order of basicity for the labeled | vedclass

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(D) To determine the basicity,we analyze the availability of the lone pair on each nitrogen atom:$(3)$ is a tertiary aliphatic amine. The lone pair is

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$3 > 4 > 1 > 2$

Vedclass · Answer

(D) To determine the basicity,we analyze the availability of the lone pair on each nitrogen atom:$(3)$ is a tertiary aliphatic amine. The lone pair is localized and available for donation,making it the most basic.$(4)$ is an aniline derivative $(Ph-NH-)$. The lone pair is in conjugation with the benzene ring,reducing its availability,but it is more basic than amides.$(1)$ is an amide nitrogen $(R-NH-CO-CH_3)$. The lone pair is involved in resonance with the carbonyl group $(C=O)$,making it significantly less basic.$(2)$ is a primary amide nitrogen $(R-CO-NH_2)$. The lone pair is involved in resonance with the carbonyl group,and it is even less basic due to the strong electron-withdrawing effect of the carbonyl group in a primary amide structure.Comparing these,the order of basicity is $(3) > (4) > (1) > (2)$.

The correct order of basicity for the labeled nitrogen atoms in the given structure is:

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