HE2Key - rniriurs kEY CHEMISTRY152 Summer Session 1,2007...

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rniriurs kEY CHEMISTRY 152 Summer Session 1,2007 June 12,2007 HOUR EXAMINATION II Ouestion Points Sc II 50 III 15 IV 15 v15 VI 25 TOTAL I5O Exam Begins Here I. (30 points). In the answer area below, darken the space of the most appropriate response to each of the following multiple choice questions. ANSWERS TO OUESTION I abcde 1. il il il t il 2.illililil 3. il il il il il abcde 4il?ililil s.ilil,ilil 6.il'ililil
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l. Initials kgY Which of the following is NOT true of acerals? a. Acetals can be regarded as geminal diethers. b. Acetals are stable to organometallic reagents. c. Acetals are stable to aqueous base. (1!/ Acetals arestable ro aquous acid. e. Acetals are stable to the Wiftig reaction. Rank the following bromides in terms of their S^2 rates (fastest to slowest) with a given nucleophile. 2. r-fut \-, a. rieht @,* c. neither;K=l d. can't be determined without specific knowledge of the pKa values e. what a silly question 4. The following reaction equilibrium wouldlie to the: co2cHs + HCI cH3oH a. risht (!/ left c. neither; K=1 d. can't be determined without knowing the heats of formation of the organic materials e. this will depend on the solvent in which the reaction is conducted would lie to the: oH oH 1i 'r^\ r\ i l t i l l YY CHs CO2CH3 6\cocr \2+ o- I 1t\ +ll I Y cHe o,,^r, jz,,a, AB a. A>B>C @,ttctn c. C>A>B d. C>B>A e. B>C>A
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