Question

HE ALDOL REACTION: TETRAPHENYLCYCLOPENTADIENONE Synthetic Chemistry Lab. Semester 1, 2019 1F Ph Ph Ph Ph КОН, ETOH Ph Ph Ph Ph Reflux Buchner filtration KOH: corrosive - especially as a solution in ethanol! Dissolve potassium hydroxide (145 mg) in ethanol (1 mL) in a 10 mL round bottomed flask. Add benzil (1 g) and 1,3-diphenylacetone (1 g) to a 50 mL round bottomed flask. Add ethanol (7 mL) and a magnetic stirring bar. Fit the flask with a reflux condenser and heat until almost at its boiling noint Using a

What is the balanced chemical equation for this reaction?

Answer 1

Alpha carbon atom of diphenylketone convert enolate in presence of base.

Enolate react with 1,2 diphenylethanesione.

Proton loss from beta carbon atom of diphenylketone (water molecule loss) to form hydroxy intermediate.

Which undergo cyclisation by loss of water molecule from ketone group in 1,2 diphenylethane dione.

Finally form tetraphenyl cyclopentanedione.

Reaction:

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'' Ph, P1, H, fb, Pharon Telea phenyl Cyclopenta dienone phr