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Introduction


Definitions


Three-Dimensional Representations


Assigning Priorities


Determining Stereochemical Relationships


Question Sets


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Three-Dimensional Representations: Testing Your Knowledge


Choose the correct answer for each of the following 10 multiple choice questions relating to the Three-Dimensional Representations section 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 explanations for the correct choices.

1. Which of these statements is true for the following molecule?



a. This structure is a staggered sawhorse.
b. This structure is an eclipsed sawhorse.
c. This structure is a staggered Newman projection.
d. This structure is an eclipsed Newman projection.

2. Which of these statements is true for the following molecule?


a. This structure is staggered and has four carbons in its longest chain.
b. This structure is eclipsed and has four carbons in its longest chain.
c. This structure is eclipsed and has three carbons in its longest chain.
d. This structure is eclipsed and has five carbons in its longest chain.

3. What are the relative orientations of the numbered groups?



a. 1: Down. 2: Down. 3. Up.
b. 1: Down. 2: Up. 3. Up.
c. 1: Up. 2: Down. 3. Up.
d. 1: Up. 2: Up. 3. Down.

4. What is the stereochemistry of the missing groups on the numbered carbons?


a. 1: Wedged. 2: Stick. 3: Dashed.
b. 1: Dashed. 2: Wedged. 3: Stick.
c. 1: Stick. 2: Wedged. 3: Dashed.
d. 1: Wedged. 2: Dashed. 3: Stick.

5. What is the relationship between the two groups in the following molecule?


a. They are equatorial to one another.
b. They are axial to one another.
c. They are cis to one another.
d. They are trans to one another.

6. Which of these statements is true for the following molecule?


a. The bromine and methyl group are cis to one another.
b. The bromine and methyl group are trans to one another.
c. The bromine and methyl group are both axial.
d. Both b and c.

7. What is the relationship between the groups in the following molecule?


a. They are cis to one another.
b. They are axial to one another.
c. They are trans to one another.
d. They are equatorial to one another.

8. On which carbon can a group be placed that is both axial and cis to the alcohol?


a. Carbon 1.
b. Carbon 2.
c. Carbon 3.
d. Carbon 4.

9. Which group is trans to the rest of the groups?


a. Group 1.
b. Group 2.
c. Group 3.
d. Group 4.

10. On which carbon can a group be placed that is both equatorial and cis to both groups?


a. Carbon 1.
b. Carbon 2.
c. Carbon 3.
d. Both a and c.
e. None of the above.




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