Multistep - Introduction In this experiment we will be...

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Introduction In this experiment we will be doing a multistep experiment to obtain tetraohenylcyclopentadienenone. An aldol condensation will be used in this multistep experiment. In an aldol condensation, an enoate ion reacts with a carbonyl compound to form a beta-hydroxyaldehyde. Then, a dehydration occurs in which it turns into a conjugated enone. Substance MW MP BP d Safety Considerations benzaldehyde 106.13 -26 178.1 4.1 thiamine 266.4 248 ethanol 46.06 158.8 351.6 0.79 flammable NaOH 39.99318 318 1390 2.1 chemical burns, flammable benzoin 212.25 137 344 1.31 nitric acid 63.01 -42 83 1.51 corrosive, cause burns benzil 210.23 94 346 1.23 KOH 56.1 406 1320 2.04 corrosive Materials Round-bottom flask Magnetic stirrer Benzaldehyde Vial Thiamine catalyst Ethanol NaOH Stopper Graduated Cylinder Beakers Hirsh Funnel
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Vacuum Tube Scale Melting Point Tube Melting Point Device Hot Plate Nitric Acid Pasteur Pipet Condenser Ice Water Glass Rod IR machine 1,3—diphenylacetone Absolute ethanol KOH Apron and Goggles Methods Put a magnetic stirrer and one and a half milliliters of benzaldehyde in a round- bottom flask.
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Use .67 milliliters of water and 2 milliliters of ethanol to dissolve the 225mg of thiamine. This mixture will then be added to the benzaldehyde in the round-
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This note was uploaded on 04/03/2008 for the course CHEM 243A taught by Professor Bharadwaj during the Fall '08 term at University of Arizona- Tucson.

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Multistep - Introduction In this experiment we will be...

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