Advertisements
Advertisements
प्रश्न
Arrange the following compound in increasing order of its reactivity in nucleophilic addition reactions.
Ethanal, Propanal, Propanone, Butanone.
Hint: Consider steric effect and electronic effect.
Advertisements
उत्तर
The +I effect of the alkyl group increases in the order:
Ethanal < Propanal < Propanone < Butanone
The electron density at the carbonyl carbon increases with the increase in the +I effect. As a result, the chances of attack by a nucleophile decrease. Hence, the increasing order of the reactivities of the given carbonyl compounds in nucleophilic addition reactions is:
Butanone < Propanone < Propanal < Ethanal
APPEARS IN
संबंधित प्रश्न
Acetaldehyde, when treated with which among the following reagents does NOT undergo addition reaction?
(A) Ammonia
(B) Hydroxylamine
(C) Ammoniacal silver nitrate
(D) Semicarbazide
How are the following compounds prepared?
benzaldehyde from benzene
Predict the product of the following reaction:
\[\begin{array}{cc}
\phantom{..............}\ce{O}\\
\phantom{..............}||\\
\ce{R - CH = CH - CHO + NH2 - C - NH - NH2 ->[H+]}\end{array}\]
What is meant by the following term? Give an example of the reaction in the following case.
Oxime
What is meant by the following term? Give an example of the reaction in the following case.
Schiff’s base
Complete the synthesis by giving missing starting material, reagent or product.
\[\ce{C6H5CHO ->[H2NCONHNH2]}\]
Write balanced chemical equations for action of ammonia on - acetaldehyde
How will you convert benzoic acid to m-bromobenzoic acid?
Which of the following compounds is most reactive towards nucleophilic addition reactions?
The pH of blood does not appreciably change by a small addition of acid or base because
Paraldehyde is formed as a result of polymerisation:-
The most stable reagent for the conversion of R – CH2OH → RCHO is
What is the action of sodium hypoiodite on acetone?
What happens when ethanal is treated with excess ethanol and acid?
In the following reaction
\[\ce{Carbonyl compound + MeOH <=>[HCl] acetal}\]
Rate of the reaction is the highest for ______.
Draw structure of the following derivative.
The ethylene ketal of hexan-3-one
Draw the structure of the following derivative.
Acetaldehydedimethylacetal
Draw the structure of the given derivative.
The ethylene ketal of hexan-3-one
