Ch.5 Practice Key

Ch.5 Practice Key - Chapter 5(Practice Bennett Department...

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Chapter 5 (Practice) Bennett Department of Chemistry West Virginia University February 24 th , 2008 Name:______________________________________ This exam is a closed book, closed notes. Calculators and a molecular model set are allowed. You must show your work in order to receive partial credited.
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Chemistry 233 Spring 2008 1 Question 1 (20 points): 1a) How many stereogenic centers in the following molecules (note: it could be 0) (5 points). CH 3 CH 2 CH 2 CH(CH 3 )CH(sec-Bu)CH 2 CH(CH 3 )CH 2 CH 3 i-Pr OMe OMe OMe HOOC COOH HOOC COOH * * * * * H Br Cl S R S * * No stereogenic center S * R S S not a stereogenic center *: Stereogenic center, no need to identify the R/S 1b) Label R/S for each stereogenic center above (4 points). 1c) Draw enantiomers for the following molecules (3 points). i-Pr CHClBr OMe OMe HOOC COOH i-Pr CHClBr achiral molecule, no enantiomer HOOC COOH 1c) Draw one diastereomer for the following molecules (3 points). i-Pr CHClBr OMe OMe HOOC COOH i-Pr CHClBr OMe
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Ch.5 Practice Key - Chapter 5(Practice Bennett Department...

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