How is the synthesis of dibenzalacetone carried out?
Synthesis of Dibenzalacetone by Aldol Condensation. 1. To carry out a mixed aldol condensation reaction. 2. To study the mechanism of aldol condensation reaction. The reaction of an aldehyde with a ketone employing sodium hydroxide as the base is an example of a mixed aldol condensation reaction, the Claisen-Schmidt reaction.
How to make dibenzalacetone by aldol condensation?
Lab Report #11 – Synthesis of Dibenzalacetone by the Aldol… This preview shows page 1 – 5 out of 8 pages. INTRODUCTION The goal of this experiment is to synthesize dibenzalacetone from benzaldehyde and acetone by the aldol condensation. Mixed aldol condensation if a reaction in organic chemistry used for the formation of carbon-carbon bonds.
How to make benzalacetophenone from benzaldehyde?
Sample preparation: Using a pipette, a drop is taken from the reaction mixture or from the product and diluted with 10 mL dichlormethane. 10 mg of solid substances are dissolved in 10 mL dichloromethane. 0.2 µL from this solution are injected.
What was the benefit of the aldol condensation reaction?
The benefit of this lab was to acquaint oneself with the fundamentals of the Aldol Condensation reaction by demonstrating the synthesis of dibenzalacetone (trans, trans-1,5-Diphenyl-1,4-pentadien-3-one) through the aldol condensation of acetone with benzaldehyde. The synthesis began by using a strong base to generate the acetone enolate ion.
How to recrystallize dibenzalacetone as a solid?
Dibenzalacetone will crash out of the solution as a solid during the course of the reaction. Collect this solid via Hirsch filtration and wash it several times with small portions of cold water. Allow the solid to air dry by continuing to apply the vacuum for 2-3 min. Recrystallize the solid by dissolving in 2 mL of hot ethanol.
How is aldol condensation used to make dibenzalacetone?
Condensation is a process which joins two or more molecules usually with the loss of a small molecule such as water or an alcohol. Aldol condensation (Claisen-Schmidt reaction) definitely is a process which join two carbonyl groups with a loss of water molecule in order to form β-hydroxyketone.
How is dibenzalacetone used in sun protection preparations?
Dibenzalacetone is a fairly innocuous substance in which its spectral properties indicate why it is used in sun-protection preparations. In the present experiment, sufficient ethanol is present as solvent to readily dissolve the starting material, benzaldehyde and also the intermediate, benzalacetone.