| 1. | Which of the following compounds are chiral? Which have chiral centers? |
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| a) | 2,4-dimethylpentane | c) | 5-ethyl-3,3-dimethylheptane | |
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| b) | cis-1,4-dichlorocyclohexane | d) | E,E-4,5-dimethyl-2,6-octadiene | |
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| 2. | Identify each chiral center in each structure as R or S. | |||||
| a) |  |
b) |  |
c) |  |
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| 3. | Draw the enantiomers of cysteine and identify them as R or S. |  show answer |
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