Exam2BKEY - CHM 241 Exam 2 Prof. Biros, Winter 2011 NAME _...

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CHM 241 Exam 2 NAME ________________ Prof. Biros, Winter 2011 VERSION B There are 25 multiple choice (MC) questions , and each is worth 3 points. Completely fill in the appropriate circle on the scantron bubble sheet for these questions. The Short Answer (SA) section is worth a total of 25 points. You may not use any calculators or extra materials on this exam. “ I agree with your Excellency’s judgement about chemists, and I believe that they merely utter words outside common usage in order to pretend they know what they don’t.” Rene Descartes GOOD LUCK!!! Fill in this letter on your scantron sheet in the EXAM FORM box
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3 VERSION B Multiple Choice Section (3 pts each) . Choose the best answer to each question below and completely fill in the appropriate circle on the scantron bubble sheet for these questions. 1. How many stereocenters are present in this molecule? H 3 C H 3 C CH 3 CH 3 Br (a) 1 (b) 2 (c) 3 (d) 4 2. What are the absolute configurations of the two molecules shown below? HO SH CH 3 HO 2 C I H CH 3 CH 2 Cl OCH 3 II (a) R (I) and R (II) (b) S (I) and R (II) (c) R (I) and S (II) (d) S (I) and S (II) 3. How many stereocenters are there in the molecule 2,4,6-trimethylheptane? (a) 0 (b) 1 (c) 2 (d) 3 (e) 8 4. Which molecule has the R configuration? BrH 2 C OH H CH 3 Br H OCH 3 C N H CH(CH 3 ) 2 CH 2 CH 3 CH 3 Br OCH 3 H C N compound 1 compound 2 compound 3 compound 4 (a) compound 1 (b) compound 2 (c) compound 3 (d) compound 4 5. What is the correct stereochemical description of the relationship between this pair of compounds? HO HO H H HO H H OH (a) identical (b) constitutional isomers (c) enantiomers (d) diastereomers 6. Which statement is true? (a)
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Exam2BKEY - CHM 241 Exam 2 Prof. Biros, Winter 2011 NAME _...

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