quiz3-2008-2009

quiz3-2008-2009 - Quiz#3 Version 3.1 CHEM111 Fall Semester...

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Quiz #3, Version 3.1, CHEM111, Fall Semester, 2008/2009 Student Name: Student ID #: Section: Note: You are required to complete all questions independently. Reference materials such as textbook and lecture notes are not allowed. 1. (8 pts) Draw a structure for each of the following compounds: (a) ( R )-4-methyl-oct-2,5-diyne; (b) meso -2,3-dibromobutane. 2. (6 pts) Circle the optically active compounds from the following list: 3. (8 pts) An alcohol dehydrogenase (ADH) has been found to catalyze the oxidation of deuterated ethanol by the coenzyme NAD + as shown in the following reaction scheme. Please answer the following questions for oxidation of ethanol by the same ADH: (1) Which prochiral hydrogen in ethanol is abstracted? (2) To which prochiral face of NAD+ is the transferred hydride added?
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quiz3-2008-2009 - Quiz#3 Version 3.1 CHEM111 Fall Semester...

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