Question

3) Ethyl acetate on heating with sodium ethoxide forms:
a) Ethyl acetoacetate
b) Sodium acetate
c) Ethanol
d) Diethyl ether​

Answer 1

Answer:

C

Explanation:

heating ethyl acetate with sodium ethoxide in ethanol, followed by acidification. β-Keto ester. O–Na+) breaks into ethoxide ion and sodium ion. This ethoxide ion attacks ethyl acetoacetate to give ethyl alcohol(ethyl alcohol is also known as ethanol )and ester anion.

Answer 2

Ethyl acetate on heating with sodium ethoxide forms Ethyl acetoacetate (Option A).

Chemical Reaction,

CH₃COOC₂H₅+CH₃COOC₂H₅$-\frac{OC2H5}{} - >$CH₃COCH₂COOC₂H₅+C₂H₅OH

The reaction is Claisen condensation.

Here,

In Ethyl acetate there is a partial positive charge on the center carbon atom (sp2 carbon i.e reactivity increases) now there will be a partial positive charge on the hydrogen atom and ethoxide ions are ($Na^{+}$ + $C_{2}H_{5} O^{-}$ ) and $C_{2}H_{5} O^{-}$ reacts with the partially positive hydrogen atom to form Ethyl acetoacetate.