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2nd_Midterm_US08 - CEM251 Summer 2008 Midterm#2 CEM 251...

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CEM251, Summer 2008 Midterm #2 1 CEM 251, Summer 2008 Section 705 Midterm #2 June 18, 2008 Name:______________________________ PID: _______________________________ This is a closed book and note examination. If boxes are provided for your answers, only what is written in the boxes will be graded . You have 90 minutes to complete the test. Question Points Score 1 12 2 6 3 8 4 6 5 6 6 6 7 14 8 30 9 12 Total 100
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CEM251, Summer 2008 Midterm #2 2 1. Provide a name or a structure for the following compounds (Indicate stereochemistry where appropriate)( 12 pts, 2 pts each box ) a. (1S,3R)-1-chloro,3-ethyl cyclopentane b . 4,4-dimethyl-2-hexyne c . Vinyl Chloride d. e. f. F Br D include R/S include R/S
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CEM251, Summer 2008 Midterm #2 3 2. Propose a mechanism for the following S N 1 reaction. (You must show all steps and the structure of the intermediate using curved arrows to indicate the flow of electrons in each step.) (6 pts) Br dilute NaOH OH
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CEM251, Summer 2008 Midterm #2 4 3. Draw all possible elimination products for the following reaction and circle the most stable one (8 pts).
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