HW-II-Answer_key - CHEM 4210/4210G HOMEWORK 2 Due date Nov....

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1 CHEM 4210/4210G HOMEWORK 2 Due date Nov. 1, 11AM Tuesday 2011 (Chapters 4 & 5) Name __________________, ID______________ 1. Predict the structure, including stereochemistry, of the product(s) expected for the following reactions. If more than one product is shown, indicate which is major and which is minor.
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2 2. Provide reagents for the following transformations:
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3 3. Which reaction in each pair would be expected to be faster? Explain. 1) The 2,2,2-trifluoroethylsulfonate is a somewhat better leaving group and reacts about 175 times faster in the example cited. 2) The donor effect of the ERG CH 3 favors reaction, whereas the polar effect of the EWG group CF 3 retards the reaction. The difference is a factor of about 1000 in the example cited. 3) The α-sulfonyl chloride is less than one-twentieth as reactive as the β-sulfonyl halide. This is due to a steric effect of the branched sulfonyl, perhaps enhanced by the partial negative charge (repulsive to iodide) associated with the sulfonyl
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HW-II-Answer_key - CHEM 4210/4210G HOMEWORK 2 Due date Nov....

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