How do you synthesis dibenzalacetone?

How do you synthesis dibenzalacetone?


  1. Add 10ml of freshly distilled benzaldehyde and 20ml of acetone to a conical flask.
  2. Place the flask in a cold bath of water and then, with regular stirring, add 2.5ml sodium hydroxide dropwise.
  3. Keep the temperature at 30 oC.
  4. stir the mixture for 2 hours after the complete addition of sodium hydroxide.

What side products are expected in the dibenzalacetone synthesis?

In mixed aldol condensation, one molecule of aldehyde reacts with the other molecule of aldehyde. The reaction between acetone and two molecules of benzaldehyde to form dibenzalacetone is shown below. Therefore, the side product formed in the synthesis of dibenzalacetone is H2O H 2 O .

How is methyl iodide prepared from methanol?

Methyl iodide has been prepared by the action of methyl sulfate on an aqueous solution of potassium iodide;1 by the slow distillation of a mixture of methanol with a large excess of constant-boiling hydriodic acid;2 by the electrolysis of an aqueous solution of potassium acetate in the presence of iodine or potassium …

Why is dibenzalacetone used in sunscreens?

Dibenzalacetone is a common ingredient in sunscreen. This is because dibenzalacetone absorbs UV light and helps to protect the skin from the sun’s damaging rays. or even scatter the harmful UV rays. Another importance is for the compound to not cause an allergic reaction on a person’s skin.

What is the formula of dibenzalacetone?


What were the side products of aldol condensation experiment?

During this experiment, an aldol condensation reaction was done with the reactants acetone and benzaldehyde. This reaction forms the product benzalacetone. A side reaction, called the Cannizzaro reaction, can occur during this reaction. This reaction would give the two products benzoic acid and benzyl alcohol.

What happens when iodine is placed in methanol?

Iodomethane is formed via the exothermic reaction that occurs when iodine is added to a mixture of methanol with red phosphorus.

What happens when iodine is placed in hexane?

The iodine molecule is non-polar. In the molecular form, iodine vapors are violet. When mixed with hexane, the iodine molecules experience London dispersion forces. When mixed with either water or ethanol, the iodine molecules are subjected to polar forces, resulting in an induced polarity in the iodine molecules.

What is the other name of dibenzalacetone?


Preferred IUPAC name (1E,4E)-1,5-Diphenylpenta-1,4-dien-3-one
Other names Dibenzalacetone
CAS Number 538-58-9 non-specific 35225-79-7 (E,E) 115587-57-0 (E,Z) 58321-78-1 (Z,Z)