Question

$2 CH _{3} \overset{\underset{||}{O}}{C}OC _{2} H _{5} \ce{->[{ C _{2} H _{5} ONa }]}A, A$ is formed by Claisen condensation. Which is/are true about $A$?

• A. A forms oxime
• B. A shows tautomerism
• C. A shows iodoform test
• D. All of the above are true

Answer 1

Answer: (D)

$CH _{3} \overset{\underset{||}{O}}{C} OC _{2} H _{5}+ HCH _{2} \overset{\underset{||}{O}}{C}O C _{2} H _{5}\ce{->[{ C _{2} H _{5} ONa }]}CH _{3} \overset{\underset{||}{O}}{C} \underset{\text{(A)Keto ester}}{CH _{2} \overset{\underset{||}{O}}{C}OC _{2} H _{5}}$
(b) $A$ forms oxime due to keto group
(c) $A$ shows tautomerism
(d) $A$ shows iodoform test due to $CH _{3} \overset{\underset{||}{O}}{C} -$