Chalcone: spot the stereochemistry flaw

Single question

Claisen-Schmidt condensation of benzaldehyde with acetophenone gives chalcone. Reactants and reagents are right. Check the geometry of the alkene in the product.

Claisen-Schmidt condensation mechanism

E vs Z selectivity in aldol dehydration

Why conjugated trans alkenes are thermodynamically favored

Find the flaw

Click the step that contains the flaw, or pick “No flaw” if you think every step is correct.

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