In the Claisen-Schmidt reaction to prepare dibenzalacetone from 5.3 g of benzaldehyde, a total of 3.51 g of product was obtained. The percentage yield in this reaction was %.
Answer
60
Solution
Claisen–Schmidt: 2 PhCHO (no -H) + acetone dibenzalacetone.
[figure]
212 g (2 mol) PhCHO give 234 g product
⇒ 5.3 g give 5.3 234212=5.85 g
Yield = 3.515.85 100=60\%
Answer: 60