practiceChemistry 332 Exam II

practiceChemistry 332 Exam II - 1 Show the mechanism for...

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1. Show the mechanism for the formation of a hemiacetal utilizing an aldehyde of your choice; methanol and catalytic acid. (H + ). Be sure to use curved arrow notation where necessary. 2. Aldehydes are more reactive than ketones. Why? 3. In the Baeyer-Villiger oxidation reaction of ketones to esters indicate the relative migration capacity of the following alkyl groups (A-D) from most able to migrate (A) to least able to migrate (D) . methyl; 2 ° carbon; 3 ° carbon; 1 ° carbon 4 . Was diol q made by nucleophilic addition to an epoxide, or reaction of osmium tetroxide (OsO 4 ) with an alkene? How do you know? OH OH q 5 . Reduction of compound R using sodium borohydride to an alcohol gives 2 products, S and T . which product is favored?(2) Why is that product favored?(3) H 3 C CH 3 O H 3 C CH 3 H 3 C CH 3 OH H H OH S T R 1. NaBH 4 in MeOH/THF 2. H 3 O + 6. Show the mechanism of addition of ethyl magnesium iodide to the compound shown below.
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