2nd midterm 2006

2nd midterm 2006 - Page 1 of 5 Chemistry 118C Second...

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Page 1 of 5 Chemistry 118C Name__________________________________________ Second Midterm Last First Middle May 23, 2006 Dr. Xi Chen TA____________________________________________ Page Points 1 2 3 4 5 Total You will have 1 hour to complete this exam. This exam contains 5 pages and 4 problems. When you are told to start, check to see that all the pages are there. If not, ask for help now . No adjustments will be made later. 1. (15 pts) Multiple choice. Circle the correct answer (3 points each). a) Which of the following is the strongest acid OH OH OH OH NO 2 b) Which of the following is the strongest acid OH NO 2 OH NO 2 NO 2 OH NO 2 OH CH 3 c) Circle the most acidic hydrogen(s) in the following molecule CH 2 CC H 2 COC H 2 CH 3 O O H H H 3 C H H d) Circle the one(s) in the following that will n o t undergo successful Claisen Condensation . CH 2 CO 2 Et CO 2 Et CO 2 Et CO 2 Et CO 2 Et e) Circle the best starting materials for making (CH 3 ) 2 CHCCH 3 + HCO 2 Et + (CH 3 ) 2 CHCO 2 Et CH 3 CO 2 Et + (CH 3 ) 2 CHCH ClCH 2 CO 2 Et + (CH 3 ) 2 CHCCl CO 2 O O O (CH 3 ) 2 CHCCH 2 CO 2 Et O
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Page 2 of 5 2. (45 pts) Write the structure of the major organic product(s) of each reaction shown below. If you
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2nd midterm 2006 - Page 1 of 5 Chemistry 118C Second...

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