Single Choice

In the reaction sequence, the product $$B$$ is: $$2CH_3CHO\overset{OH^-}{\longrightarrow} A \overset{\Delta}{\longrightarrow}B$$

A$$CH_3-CH=CH-CHO$$
Correct Answer
B$$CH_3COCH_3$$
C$$CH_3-CH_2-CH_2-CH_3$$
D$$CH_3-CH_2-CH_2-CH_2-OH$$

Solution

In the reaction sequence, $$2CH_3CHO\overset{OH^-}{\longrightarrow} A \overset{\Delta}{\longrightarrow}B$$; the product B is $$CH_3-CH=CH-CHO$$ $$2CH_3CHO\overset{OH^-}{\longrightarrow} \underset {A} {CH_3-CH(OH)CH_2-CHO} \overset{\Delta}{\longrightarrow} \underset {B} {CH_3-CH=CH-CHO}$$ In presence of hydroxide ions, two moles of acetaldehyde condense to form beta-hydroxy alcohol (compound $$A$$) which on dehydration forms alpha beta-unsaturated aldehyde (compound $$B$$). Thus option (B) is correct.

SIMILAR QUESTIONS

Physical World

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Physical World

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Physical World

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Physical World

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Physical World

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Physical World

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Physical World

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Physical World

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Physical World

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Physical World

How will you convert ethanal into the following compounds? But-2-enal

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