MCAT Organic Chemistry Question 15: Answer and Explanation
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Question: 15
15. Consider the name 2,3-diethylpentane. Based on the structure implied by this name, the correct IUPAC name for this molecule is:
- A. 2,3-diethylpentane.
- B. 1,2-diethylbutane.
- C. 3-ethyl-4-methylhexane.
- D. 3-methyl-4-ethylhexane.
Correct Answer: C
Explanation:
Draw out the molecule, and you will see that the longest carbon chain with the substituents at the lowest possible carbon numbers is actually different from the one chosen in the original name. The correct IUPAC name for this molecule is 3-ethyl-4-methylhexane.