Organic Chemistry I Chem 334 - Fall 2012

Pre-Quiz 7

Professor Carl C. Wamser

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Your answers must be submitted before 7:30 am, Tues, Nov 6

1. How many stereogenic centers are there in 1,1,2,3-tetramethylcyclohexane?

a) 1

* b) 2

c) 3

d) 4

2. Which of the following groups would have the highest priority in determining R and S?

a) CH2CH2OH

* b) CH(CH3)2

c) CH2CH3

d) CH2C(CH3)3

3. The absolute configurations for cis-1,2-dimethylcyclopropane would be

a) (R,R)

b) (S,S)

c) either (R,R) or (S,S)

* d) (R,S)

4. If the optical rotation of pure (R)-2-butanol is -13.5°, then you would expect the optical rotation of racemic 2-butanol to be

a) -13.5°

b) +13.5°

* c) 0°

d) can't tell

5. Which of the following could have a meso stereoisomer?

a) 1,2-dichloropentane

b) 1,3-dichloropentane

c) 2,2-dichloropentane

* d) 2,4-dichloropentane