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Exam 5: Stereochemistry

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Question 21

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Can the molecule shown below be properly described as a meso compound?

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Question 22

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Draw the structure of (1R, 2S, 3S)-1,2-dibromo-3-ethylcyclohexane. Take particular care to indicate stereochemistry properly.

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Question 23

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Which of the following terms best describes the pair of compounds shown: enantiomers, diastereomers, or the same compound?

Label each asymmetric carbon in the compound below as R or S.

Label each asymmetric carbon in the compound below as R or S.

The specific rotation of pure (-)-2-butanol is -13.5°. If a mixture has a specific rotation of +7°, how much of each form (+ and-) is present and what is the e.e. of the mixture?

Can a molecule be chiral if it contains no asymmetric carbons? Explain briefly.

Label each asymmetric carbon in the compound below as R or S.

Which of the following configurations corresponds to the structure below?

Is the molecule shown below chiral or achiral?

Is the molecule shown below chiral or achiral?

Label each asymmetric carbon in the compound below as R or S.

A mixture of equal amounts of two enantiomers ________.

How many asymmetric carbons are present in the compound below?

Briefly describe how two enantiomers might be separated.

If possible, draw the structure of the enantiomer of the molecule shown below.

In the molecule below, show how C3 is not a chirality center, but is is a stereocenter.

Is the molecule shown below chiral or achiral? (CH₃)₃CCH(CH₃)₂

Can the molecule shown below be properly described as a meso compound? (CH₃)₂CHCH₂CH₃

If possible, draw the structure of any diastereomer of the molecule shown below.