Advertisements
Advertisements
प्रश्न
Write the main product formed when propanal reacts with the following reagents:
H2N- NH2 followed by heating with KOH in ethylene glycol.
Advertisements
उत्तर
\[\ce{CH3CH2CHO + H2N - NH2 -> CH3CH2CH = N - NH2 + H2O}\]
This is a nucleophilic addition-elimination process where the carbonyl group (C = O) is replaced with a hydrazone group \[\ce{(C = N - NH2)}\].
The hydrazone is then heated with KOH in ethylene glycol, a strong base under high-temperature conditions. This leads to the loss of nitrogen gas (N2) and the reduction of the carbon–nitrogen double bond to a C–H bond.
\[\ce{CH3CH2CH = N - NH2 \overset{KOH/ethylene glycol,Δ}{->} CH3CH2CH3 + N2 ↑}\]
APPEARS IN
संबंधित प्रश्न
What is meant by the following term? Give an example of the reaction in the following case.
Ketal
Predict the products formed when cyclohexanecarbaldehyde reacts with the following reagents.
Excess ethanol and acid
Write balanced chemical equations for action of ammonia on - acetone
Give a simple chemical test to distinguish between 
Identify the compounds A, B and C in the following reaction.
\[\ce{CH3 - Br ->[Mg/ether] (A) ->[(i) CO][(ii) Water] (B) ->[CH3OH/H+][Δ] (C)}\]
The product "P" in the above reaction is:
Aldehydes and ketones react with hydroxylamine to form ______.
Out of p-tolualdehyde and p-nitrobenzaldehyde, which one is more reactive towards nucleophilic addition reactions, why?
Draw structure of the following derivative.
The ethylene ketal of hexane-3-one
Draw structure of the following derivative.
The ethylene ketal of hexan-3-one
