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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 3


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 has (have) exactly two chiral centers?


a. I only.
b. II only.
c. III only.
d. None of the above.

2. Which of the following molecules are geometric isomers?


a. I and II.
b. I and III.
c. II and III.
d. None of the above.

3. How many diastereomers exist of the following molecule?


a. Zero (0).
b. One (1).
c. Two (2).
d. Six (6).

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


a. Isomers.
b. Constitutional isomers.
c. Configurational isomers.
d. None of the above.

5. On which position can a group be placed that is gauche to both the bromine and the methyl group?


a. Position 1.
b. Position 2.
c. Position 3.
d. None of the above.

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


a. Group A.
b. Group B.
c. Group C.
d. Group D.

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 stereocenters have an S orientation?


a. Zero (0).
b. One (1).
c. Two (2).
d. Three (3).
e. Four (4).

10. What is the complete name of the molecule below, if the base name of the molecule is 6-ethyl-2,4,4,5,7-pentamethyl-3-propyl-2,5,7-decatriene?


a. 6-ethyl-2,4,4,5,7-pentamethyl-3-propyl-2,(5,E),(7,Z)-decatriene.
b. 6-ethyl-2,4,4,5,7-pentamethyl-3-propyl-2,(5,E),(7,E)-decatriene.
c. 6-ethyl-2,4,4,5,7-pentamethyl-3-propyl-2,(5,Z),(7,Z)-decatriene.
d. 6-ethyl-2,4,4,5,7-pentamethyl-3-propyl-2,(5,Z),(7,E)-decatriene.

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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