Advertisements
Advertisements
प्रश्न
Which of the following is the correct representation for intermediate of nucleophilic addition reaction to the given carbonyl compound (A):
(i) 
(ii) 
(iii) 
(iv) 
Advertisements
उत्तर
(i)
(ii)
Explanation:
The given compound is a planar molecule with sp2 hybridized carbon. Carbon atoms are attacked by nucleophiles. If the nucleophile approaches from the front, the (i) and (ii) molecules shift to the front and back positions, respectively and the carbon becomes tetrahedral. Another alternative is that (i) and (ii) molecules will be located above and below the plane, respectively. As a result, the choices (iii) and (iv) aren't represented as planar molecules.
APPEARS IN
संबंधित प्रश्न
Arrange the following compound in increasing order of its reactivity in nucleophilic addition reactions.
Benzaldehyde, p-Tolualdehyde, p-Nitrobenzaldehyde, Acetophenone.
Hint: Consider steric effect and electronic effect.
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.
Ketal
What is meant by the following term? Give an example of the reaction in the following case.
Imine
Give plausible explanation for the following:
Cyclohexanone forms cyanohydrin in good yield but 2, 2, 6 trimethylcyclohexanone does not.
Write the structure of Phenylmethanamine.
What are amines?
Write the main product formed when propanal reacts with the following reagents:
2 moles of 3 CH OH in presence of dry HCl
Alkenes 
and carbonyl compounds 
, both contain a π bond but alkenes show electrophilic addition reactions whereas carbonyl compounds show nucleophilic addition reactions. Explain.
Which of the following has the most acidic hydrogen?
Grignard reagent on reaction with acetone forms.
The most stable reagent for the conversion of R – CH2OH → RCHO is
The product of following reaction is
\[\ce{CH3 - CH = CH - CH2 - CHO ->[i) LiAlH4][ii) H3O+]}\] ______?
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 structures of the given derivatives.
The ethylene ketal of hexan-3-one
Draw structure of the following derivative.
The ethylene ketal of hexan-3-one
Draw the structure of the following derivative.
Acetaldehydedimethylacetal
Which of the following will not be formed when calcium formate is distilled with calcium acetate?
