Questions 1, 2, and 4 please. Regarding the synthesis of cinnamic acid via and Aldol condensation. Thanks! Questions 1. What was the purpose of the second set of extractions with dichloromethane? 2. Why was methanol used as a solvent for the reaction with sodium hypochlorite rather than 2-propanol or ethanol? 3. What would happen if benzaldehyde, acetone, and acetophenone each were treated with sodium hydroxide by themselves? Write equations. 4. Why was acetone added after the sodium hypochlorite had reacted with the benzalacetone? Solution 1) cinnamic acid formed after haloform reaction and it is in the form of sodium salt of carboxylic acid. So it dissolved in water. Impurity which is formed during reaction removed by extraction of dichloromethane and cinnamic acid remains into the water which is isolated by precipitation using hydrochloric acid. 2) methanol used solvent. Solvent not play role in reaction. And have low boling point. So it get evaporated easy. Sodium hypochlorite also used as oxidant and oxidised methanol. Ethanol and propanol to respective aldehyde. 4)Excess sodium hypochlorite oxidise acetone to acetic acid. .

1. Questions 1, 2, and 4 please. Regarding the synthesis of cinnamic acid via and Aldol
condensation.
Thanks!
Questions 1. What was the purpose of the second set of extractions with dichloromethane? 2.
Why was methanol used as a solvent for the reaction with sodium hypochlorite rather than 2-
propanol or ethanol? 3. What would happen if benzaldehyde, acetone, and acetophenone each
were treated with sodium hydroxide by themselves? Write equations. 4. Why was acetone added
after the sodium hypochlorite had reacted with the benzalacetone?
Solution
1) cinnamic acid formed after haloform reaction and it is in the form of sodium salt of carboxylic
acid. So it dissolved in water. Impurity which is formed during reaction removed by extraction of
dichloromethane and cinnamic acid remains into the water which is isolated by precipitation
using hydrochloric acid.
2) methanol used solvent. Solvent not play role in reaction. And have low boling point. So it get
evaporated easy. Sodium hypochlorite also used as oxidant and oxidised methanol. Ethanol and
propanol to respective aldehyde.
4)Excess sodium hypochlorite oxidise acetone to acetic acid.