Orgo 2 Practice Exam 2 - Practice Exam 2 Chemistry 206 1....

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1 Practice Exam 2 Chemistry 206 1. Complete the following reactions: 2. H 3 O + 1. DIBAH, toluene CN O + PhLi H 3 O + OH CH 3 OH CrO 3 (excess) pyridine O 1. LiAlD 4 2. H 3 O + A. B. C. D. E. D= 2 H (an isotope of hydrogen) Ph H O + Li CH 3 H 2. In reaction 1E above, what is the stereochemical relationship of the two products? Are they racemic? 3. Consider the hydrolysis of the following acetal. If the reaction is done in 18 OH 2 ( 18 O is a heavy isotope of oxygen), where would the 18 O label end up in the products? H OCH 3 CH 3 O H + 18 OH 2 H O + CH 3 OH
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2 4. Which of the following Grignard reagents would not be stable? [circle the correct answer(s)] MgBr MgBr OCH 3 MgBr OH MgBr H O 5. Benzoic acid has pK a = 4.19. The pK a of the p -substituted benzoic acids (YC 6 H 4 COOH) are listed below by the structure of the substituent. Which of the following substituents will be the most activating in the electrophilic aromatic substitution reaction on substituted benzenes (YC 6 H 5 )?
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This note was uploaded on 10/12/2008 for the course CHEMISTRY EN.030.206 taught by Professor Falzone during the Spring '07 term at Johns Hopkins.

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Orgo 2 Practice Exam 2 - Practice Exam 2 Chemistry 206 1....

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