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Introduction


Definitions


Three-Dimensional Representations


Assigning Priorities


Determining Stereochemical Relationships


Question Sets


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Question Sets: Testing Your Knowledge, Test 2


Choose the correct answer for each of the following 15 multiple choice questions relating to the overall content of this tutorial. Don't look back at the previous pages for the answers; instead, work out the answers based on what you remember. Then click Submit to check your answers and see brief explanations for the correct choices.

1. Which of the following three molecules is (are) chiral?


a. I only.
b. II only.
c. I and II.
d. I, II, and III.

2. How many prochiral atoms does the following molecule have?


a. Three (3).
b. Five (5).
c. Six (6).
d. Eight (8).

3. How many different configurational isomers exist of the following molecule? (Include the molecule shown below in your answer.)


a. Four (4).
b. Eight (8).
c. Sixteen (16).
d. Thirty-two (32).

4. Which of the following terms best describes the following pair of molecules?


a. Isomers.
b. Constitutional isomers.
c. Configurational isomers.
d. Geometric isomers.

5. On which carbon can a group be placed that is both axial and trans to all three methyl groups?


a. Carbon 1.
b. Carbon 2.
c. Carbon 3.
d. Carbons 1 and 3.
e. Carbons 1, 2, and 3.

6. Which group on the atom marked with an asterisk (*) has the lowest priority in the molecule below?


a. The aldehyde.
b. The amine.
c. The ethoxy group.
d. The nitrile.

7. What is the spatial orientation of the double bond in the molecule below?


a. Cis.
b. Trans.
c. E.
d. Z.

8. What is the spatial orientation of the stereocenter marked with an asterisk (*) in the molecule below?


a. R.
b. S.
c. E.
d. Z.

9. In the molecule below, how many double bonds have a Z orientation?


a. Zero (0).
b. One (1).
c. Two (2).
d. Three (3).

10. What is the complete name of the molecule below, if the base name of the molecule is 3,6-dimethylhepta-2,4-diol?


a. (3,R),6-dimethylhepta-(2,S),(4,R)-diol.
b. (3,S),6-dimethylhepta-(2,S),(4,S)-diol.
c. (3,R),6-dimethylhepta-(2,R),(4,S)-diol.
d. (3,R),6-dimethylhepta-(2,R),(4,R)-diol.

11. What is the stereochemical relationship between the following two molecules?


a. Identical.
b. Enantiomers.
c. Diastereomers.
d. None of the above.

12. What is the stereochemical relationship between the following two molecules?


a. Identical.
b. Enantiomers.
c. Diastereomers.
d. None of the above.

13. What is the stereochemical relationship between the following two molecules?


a. Identical.
b. Enantiomers.
c. Diastereomers.
d. None of the above.

14. What is the stereochemical relationship between the following two molecules?


a. Identical.
b. Enantiomers.
c. Diastereomers.
d. None of the above.

15. What is the stereochemical relationship between the following two molecules?


a. Identical.
b. Enantiomers.
c. Diastereomers.
d. None of the above.




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