Organic Chemistry I

Professor Carl C. Wamser

Chapter 7 Pre-Quiz

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Your answers must be submitted before 8:30 am, Mon., Nov. 8

1. Which of the following could be optically active?

a. n-butyl bromide  
* b. sec-butyl bromide  
c. isobutyl bromide  
d. tert-butyl bromide

2. Which statement is true?

a. (R) stereochemistry correlates with (+) optical rotation  
b. (S) stereochemistry correlates with (+) optical rotation  
* c. stereochemistry does not necessarily correlate with optical rotation

3. A simple sugar might have the name 1,2,3,4-butanetetraol. How many chirality centers would it have?

a. 0  
b. 1  
* c. 2  
d. 3  
e. 4

4. Addition of bromine to cyclopentene gives a product that could be described as

a. meso  
b. optically active cis  
c. optically active trans  
d. racemic cis  
* e. racemic trans

5. The relationship between (1R,2R)-1,2-dichlorocyclopropane and (1S,2R)-1,2-dichlorocyclopropane is

a. enantiomers  
* b. diastereomers  
c. meso  
d. racemic