A) \[1<2<3<4\]
B) \[4<3<2<1\]
C) \[3<2<4<1\]
D) \[1<4<2<3\]
Correct Answer: D
Solution :
N-1 is least basic followed by N-4 as they are amide nitrogen?s and lone pair of N-1 is more delocalised with two adjacent carbonyls. N-3 is most basic as lone pair of N-2 is part of aromaticity.
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