MCAT Organic Chemistry Question 26: Answer and Explanation
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Question: 26
11. (R)-2-chloro-(S)-3-bromobutane and (S)-2-chloro-(S)-3-bromobutane are:
- A. enantiomers.
- B. diastereomers.
- C. meso compounds.
- D. the same molecule.
Correct Answer: B
Explanation:
These two molecules are stereoisomers of one another, but are not nonsuperimposable mirror images. Therefore, they are diastereomers. Note that these molecules differ by at least one, but not all, chiral carbons.