216-summer08-E2 - 216 S08-Exam #2 - Page 3....

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Unformatted text preview: 216 S08-Exam #2 - Page 3. Name_________________________ III . (10 points) (1) (6 points) The Grignard reaction has to be carried out under anhydrous conditions. Explain what would happen to the Grignard reagent formed from bromobenzene (BrC 6 H 5 ) and Mg if the solvent ether used for the reaction is contaminated with a small amount of water (i.e., more than one mol equivalent to the BrC 6 H 5 ). Show the structure of the Grignard reagent to be produced from BrC 6 H 5 and Mg and provide a chemical mechanism using the curved arrow convention as to what effect the water can have on the Grignard reagent. (2) Draw in the box provided the structure of the expected major organic product. 4 Br Ph O 1. Mg/ether 2. aq NH 4 Cl Ph = C 6 H 5 + enantiomer IV. (12 points) For the following two Diels-Alder reactions, draw in the boxes provided the structure of the expected product [for question (1)] and the structures of the two appropriate starting reactants [for...
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This note was uploaded on 03/19/2011 for the course CHEM 216 taught by Professor Nolta during the Spring '07 term at University of Michigan.

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216-summer08-E2 - 216 S08-Exam #2 - Page 3....

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