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Explain: a. P-Aminobenzaldehyde (I) d...

Explain:
a. P-Aminobenzaldehyde (I) does not show nucleophilic addition reaction.
b. Which is more acidic and why: (I) cyclohexanone or (II) 2-methyl cyclohexan-1,3-dione ?
c. When acrolein `(CH_(2)=CH-CHO)` reacts with hydrazine `(overset(..)(N)H_(2)overset(..)(N)H_(2))`, dihydropyrazole is formed. Give the mechanism of the reaction.

Text Solution

Verified by Experts

a. Due to resonance stabilisation, there is no true `(C=O)` bond present in (I) and it behaves as an amide.

b. Here, (II) is more acidic because its anolate ion is stabilised by an additional resonance structure.

c.
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