Q.

Which one of the Nitrogen atoms in

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is the most nucleophilic?

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a

III 

b

I

c

II

d

All three Nitrogen atoms are equally strong

answer is B.

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Detailed Solution

  • Nucleophiles are electron rich species and they attack on electron deficient centres.
  • In the given compound, nitrogen number II and III are in conjugation with the double bond of the carbonyl group.

And, nitrogen number I is free to donate its lone pair of electrons.

Thus, nitrogen I is the most nucleophile.

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