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Question: Answered & Verified by Expert
Among the following the weakest base is
ChemistryGeneral Organic ChemistryAIIMSAIIMS 2003
Options:
  • A $\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{NH}_2$
  • B $\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{NHCH}_3$
  • C $\mathrm{O}_2 \mathrm{NCH}_2 \mathrm{NH}_2$
  • D $\mathrm{CH}_3 \mathrm{NHCHO}$.
Solution:
1603 Upvotes Verified Answer
The correct answer is: $\mathrm{CH}_3 \mathrm{NHCHO}$.
Carbonyl group exerts an electron withdrawal effect due to which basicity at $-\mathrm{N}$ atom decreases.

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