Quiz8A - 1 CHM 2123, Quiz #8: Reactions of Aldehydes and...

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1 CHM 2123, Quiz #8: Reactions of Aldehydes and Ketones under Basic Conditions Assigned: November 9th, 2006 Due: November 13th, 2006, before 5pm MARKING SCHEME 1. The crossed aldol condensation that you will perform in the lab is a particularly easy one compared to other aldol reactions. a) Draw the mechanism for the transformation below. (2 points) Ph O H H H + Na OH Ph O Ph O Ph H O Ph O O EtO H Ph O OH H H aldol Na OH Ph O OH Ph O Ph + OH H + Z isomer (minor) H Ph H H Ph Ph b) By analyzing the structure of the product formed, explain why aldol reactions involving aromatic aldehydes and ketones are favoured. (2 points) These reactions are particularly favoured because aromatic cycles allow for the formation of extended conjugated systems.
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2 2. The experimental procedure for the haloform test is relatively experimentally simple. Perform a detailed analysis of this reaction. a) Why do we use an NaOCl solution during the experiment and not an NaOH solution and Cl 2 ? Short answers please!
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This note was uploaded on 01/25/2011 for the course MAT 1330 taught by Professor Dumitriscu during the Spring '08 term at University of Ottawa.

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Quiz8A - 1 CHM 2123, Quiz #8: Reactions of Aldehydes and...

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