Predict the product 'B' in the sequence of reaction HC=CH xrightarrow[HgSO4]30 %H2SO4 A xrightarrowNaOH B

Question

Predict the product 'B' in the sequence of reaction HC=CH xrightarrow[HgSO4]30 %H2SO4 A xrightarrowNaOH B (A) CH3COONa (B) CH3COOH (C) CH3CHO (D)

Tardigrade Admin · Accepted Answer

Compound A is acetaldehyde and compound B is 3-hydroxybutanal. A molecule of water is added to acetylene to form vinylic alcohol which tautomerizes to acetaldehyde. This is followed by aldol condensation to form 3-hydroxybutanal <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/4e6715cf9b66ec99bb0aadff1e1f290d-.png" />

Q. Predict the product 'B' in the sequence of reaction
$H C = C H 30% H_{2} S O_{4} H g S O_{4} A N a O H B$

$C H_{3} COON a$

$C H_{3} COO H$

$C H_{3} C H O$

Compound $A$ is acetaldehyde and compound $B$ is $3$ -hydroxybutanal. $A$ molecule of water is added to acetylene to form vinylic alcohol which tautomerizes to acetaldehyde.
This is followed by aldol condensation to form $3$ -hydroxybutanal

Q. Predict the product 'B' in the sequence of reaction HC=CH30%H2​SO4​HgSO4​​ANaOH​B

CH3​COONa

CH3​COOH

CH3​CHO

Compound A is acetaldehyde and compound B is 3-hydroxybutanal. A molecule of water is added to acetylene to form vinylic alcohol which tautomerizes to acetaldehyde. This is followed by aldol condensation to form 3-hydroxybutanal

Q. Predict the product 'B' in the sequence of reaction
$H C = C H 30% H_{2} S O_{4} H g S O_{4} A N a O H B$

$C H_{3} COON a$

$C H_{3} COO H$

$C H_{3} C H O$

Compound $A$ is acetaldehyde and compound $B$ is $3$ -hydroxybutanal. $A$ molecule of water is added to acetylene to form vinylic alcohol which tautomerizes to acetaldehyde.
This is followed by aldol condensation to form $3$ -hydroxybutanal