Provide a name for the following molecule:


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Correct Answer: A. 3-Ethyl-3,4-dimethylpentanoic acid
1. First, identify the (longest) parent chain -> 5 carbons; the suffix used is “pent-“.
2. Recognize that the carboxylic acid, being the only functional group, takes highest priority and is the parent functional group -> begin numbering the chain here.
3. Side chains: ethyl has locant = 3, methyl has locant = 3, 4.
4. Prefixes di-, tri- etc are NOT considered when placing substituents in alpha order.
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