Identify the IUPAC name for the compound with the structure CH3-CH(CH3)-C(CH3)2-

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Question: Identify the IUPAC name for the compound with the structure CH3-CH(CH3)-C(CH3)2-COOH.

Options:

Correct Answer: 3,3-Dimethylbutanoic acid

Solution:

The compound has a carboxylic acid group and a total of 5 carbons with two methyl groups on the third carbon, making it 3,3-Dimethylbutanoic acid.

Identify the IUPAC name for the compound with the structure CH3-CH(CH3)-C(CH3)2-COOH.

Identify the IUPAC name for the compound with the structure CH3-CH(CH3)-C(CH3)2-COOH.

Step 1: Identify the longest carbon chain in the compound. The structure CH3-CH(CH3)-C(CH3)2-COOH has a total of 5 carbon atoms in a straight chain.
Step 2: Determine the functional group present. The -COOH group indicates that this compound is a carboxylic acid.
Step 3: Number the carbon chain starting from the end closest to the carboxylic acid group. This gives us the following numbering: 1 (COOH), 2 (C), 3 (C), 4 (C), 5 (C).
Step 4: Identify the substituents on the carbon chain. There are two methyl groups (CH3) attached to the third carbon.
Step 5: Combine the information to write the IUPAC name. The longest chain is butanoic acid (4 carbons) with two methyl groups on the third carbon, making it 3,3-Dimethylbutanoic acid.

IUPAC Nomenclature – Understanding how to name organic compounds based on their structure, including identifying functional groups and the longest carbon chain.
Functional Groups – Recognizing the presence of functional groups, such as carboxylic acids, and their impact on the naming of the compound.
Substituents – Identifying and naming substituents (like methyl groups) and their positions on the main carbon chain.