Exam 2 Review

Which of the following chair conformations represents trans-1,3-dimethylcyclohexane? 

• I

• II

• III

• IV

Which of the following is the most stable conformation of cis-1-ethyl-3-isopropylcyclohexane? 

• I

• II

• III

• IV

Which of the following molecules are chiral?

• I, II

• III, IV

• II, III

• I, IV

How many stereogenic centers are present in menthol? 

• 1

• 2

• 3

• 4

Which of the following structures has the S configuration? 

• I, II, and III

• Only I and II

• Only II

• Only I

Which of the following structures has a different configuration from the other three? 

• I

• II

• III

• IV

What is the relationship between the following compounds?

• diastereomers

• constitutional isomers

• enantiomers

• identical

What is the relationship between the following compounds? 

• identical

• enantiomers

• diastereomers

• constitutional isomers

Which of the following cyclic molecules is a meso compound? 

• I

• II

• III

• IV

A reaction mixture is three parts of one enantiomer and one part of the other. What is the percent ee of this mixture?

• 40

• 75

• 65

• 50