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प्रश्न
Identify A and B from the following reaction:
\[\begin{array}{cc}
\ce{CH3}\phantom{.................}\\
|\phantom{....................}\\
\phantom{}\ce{2CH3 - C = O ->[Ba(OH)2] A ->[Δ] B + H2O}
\end{array}\]
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उत्तर
\[\begin{array}{cc}
\phantom{..........}\ce{CH3}\phantom{..................}\ce{CH3}\phantom{.......}\ce{CH3}\phantom{....................}\ce{CH3}\phantom{......}\ce{CH3}\phantom{...........}\\
\phantom{..................}|\phantom{.....................}|\phantom{...........}|\phantom{.......................}|\phantom{..........}|\phantom{.....................}\\
\phantom{}\ce{2CH3 - C = O ->[Ba(OH)2] CH3 - C - CH2 - C = O ->[Δ/-H2O]\ce{CH3 - C = CH - C = O + H2O}}\\
\phantom{.............................}|\phantom{.................................}\ce{\underset{(B)}{4-Methypent-3-en-2-one}}\phantom{}\\
\ce{\underset{\underset{(A)}{4-Hydroxy-4-methyl pentan-2-one}}{OH}}\phantom{........................}
\end{array}\]
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संबंधित प्रश्न
A compound 'A' of molecular formula C2H3OCl undergoes a series of reactions as shown below. Write the structures of A, B, C and D in the following reactions :
How will you convert ethanal into the following compound?
Butane-1, 3-diol
How will you convert ethanal into the following compound?
But-2-enal
Write structural formulas and names of four possible aldol condensation products from propanal and butanal. In each case, indicate which aldehyde acts as nucleophile and which as electrophile.
Describe the following:
Cross aldol condensation
What is substituted imine called?
Explain aldol condensation reaction in detail.
Cannizaro’s reaction is not given by ______.
Which of the following compounds do not undergo aldol condensation?
(i) \[\ce{CH3 - CHO}\]
(ii) 
(iii) \[\begin{array}{cc}
\phantom{}\ce{O}\\
\phantom{}||\\
\ce{CH3 - C - CH3}
\end{array}\]
(iv) \[\begin{array}{cc}
\phantom{}\ce{CH3}\\
|\phantom{...}\\
\ce{CH3 - C - CHO}\phantom{..}\\
|\phantom{...}\\
\phantom{}\ce{CH3}\\
\end{array}\]
Why is there a large difference in the boiling points of butanal and butan-1-ol?
What product will be formed on reaction of propanal with 2-methylpropanal in the presence of \[\ce{NaOH}\]? What products will be formed? Write the name of the reaction also.
Compound ‘A’ was prepared by oxidation of compound ‘B’ with alkaline \[\ce{KMnO4}\]. Compound ‘A’ on reduction with lithium aluminium hydride gets converted back to compound ‘B’. When compound ‘A’ is heated with compound B in the presence of \[\ce{H2SO4}\] it produces fruity smell of compound C to which family the compounds ‘A’, ‘B’ and ‘C’ belong to?
Why are carboxylic acids more acidic than alcohols or phenols although all of them have hydrogen atom attached to a oxygen atom \[\ce{(-O-H)}\]?
Assertion: The α-hydrogen atom in carbonyl compounds is less acidic.
Reason: The anion formed after the loss of α-hydrogen atom is resonance stabilised.
Cross aldol condensation occurs between
Which of the following gives aldol con~ensation reaction?
Convert the following:
Acetaldehyde to But-2-enal
The major product of the following reaction is:
Explain Aldol condensation of ethanal.
Which of the following does not give aldol condensation reaction?
Why is the α-hydrogens of aldehydes and ketones are acidic in nature?
Identify A and B:
Write a note on the aldol condensation reaction of acetaldehyde.
