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Unformatted text preview: Patricia Mora Chem 3BL The Crossed Aldol Experiment The purpose of this experiment is to perform a crossed aldol condensation reaction between acetone and either benzaldehyde, p-anisaldehyde, or cinnamaldehyde, and analyze the results obtained to identify your unknown (X, Y, or Z). The geometry of the alkenes generated was determined by conducting two aldol condensations. In the first reaction, the first enolate (coming from the acetone) attack the aldehyde and forms a product for which a new enolate could be created and used to attack another molecule of the aldehyde. This symmetrical product can be verified by the NMR spectra as well as the trans product. The trans conformer was also favored in the product because of steric hindrance. My strategy for determining the product was to compare the melting points acquired for the recrystallized product. Dianisalacetone is determined to be the product because the recrystallized melting point was 128.5-129.4. This is close to the theoretical melting point range recrystallized melting point was 128....
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This note was uploaded on 03/13/2011 for the course CHEM 3BL taught by Professor Chunmei during the Spring '08 term at University of California, Berkeley.
- Spring '08