Give plausible explanation for each of the following:

There are two –NH2 groups in semicarbazide. However, only one is involved in the formation of semicarbazones.


Only one Amino group is involved in the resonance structure of semicarbazide hence e- density on NH2 group decreases & it can’t act as a nucleophile. But another NH2 group can attack as a nucleophile to form semicarbazones.


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