TERNANSKY Midterm 3 2008 FA

TERNANSKY Midterm 3 2008 FA - Chemistry 140A Fall, 2008...

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Chemistry 140A TOTAL POSSIBLE: 200 Fall, 2008 POINTS MISSED: - 0 Third Midterm Exam-200 points 11/25/08 TOTAL: 200 DO NOT OPEN THIS EXAM UNTIL INSTRUCTED TO DO SO. ....FILL OUT THE FOLLOWING INFORMATION NOW : . LAST NAME (Print): KEY FIRST NAME (Print): Ima PID: __________________________________________________ SIGNATURE: __________________________________________ ID checker initials: ____________________ If you wish to have any answers considered for a re-grade, your exam must be completed in INK .
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22 1. (40 points) E2 reactions can give rise to multiple regioisomeric alkenes with one usually predominating. However, for each regioisomeric alkene produced, only one stereoisomer (E or Z) will be formed. This behavior is best described as (complete the words): (2 pts) REGIO SELECTIVE (2 pts) STEREO SPECIFIC For the following four E2 reactions, utilize conformational analysis (do not show) to predict the stereochemistry of the alkene product. Note that in each case, the regiochemistry of elimination to be considered is designated by an asterisk. That is, consider elimination between the carbons bearing the *. Draw the expected product on the template provided. Also, circle the correct E or Z designation for the product. H
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TERNANSKY Midterm 3 2008 FA - Chemistry 140A Fall, 2008...

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