Dibenzalacetone :Organic synthesis

Hello friends. Today we will synthesise Dibenzalacetone an organic compound formed through the famous aldol reaction called Claisen-Schmidt condensation reaction

Materials required
Sodium hydroxide 3.15g
Benzaldehyde - 3.2ml
Acetone - 2.3ml
Ethyl alcohol - 25ml
Distilled water - 30ml
Ice water bath

Step 1 is to make a solution of sodium hydroxide
Take 3.15g Sodium hydroxide keep it in a 100ml beaker kept in icebath and add 25ml ethyl alcohol and 30ml distilled water to make a solution of it. Allow it to cool in ice bath.

Step 2
In a seperate 50ml beaker mix together 3.2ml benzaldehyde and 2.3ml acetone.
After a thorough mixing we pipette out half of the mixture

Step 3
Transfer the pipetted mixture into the Cooled Sodium hydroxide solution slowly with constant stirring.
by about 1minute a white fluffy precipitate is formed.
continue stirring for another 15minutes

Whats happening here is 2molecules of Benzaldehyde reacts with 1 molecule of acetone on both its alpha carbons
Let us continue.

After 15 minutes add the rest of the mixture of benzaldehyde and acetone and continue stirring gently for 30minutes.
Slowly a pale yellow precipitate forms.
After 30minutes stop stirring and filter the solution to collect the precipitate.
Ice cold water can be used to purify the product.(DBA is insoluble in water)
Further purification can be done by recrystallising usinge ethyl alcohol (DBA is soluble in ethanol)

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