Which of the following is the correct IUPAC name for the compound CH3-CH(CH3)-C(

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Question: Which of the following is the correct IUPAC name for the compound CH3-CH(CH3)-C(CH3)2-COOH?

Options:

Correct Answer: 3-Methyl-2-pentanoic acid

Solution:

The longest chain has 5 carbons, with a methyl group on the second carbon and a carboxylic acid on the first, making it 3-Methyl-2-pentanoic acid.

Which of the following is the correct IUPAC name for the compound CH3-CH(CH3)-C(CH3)2-COOH?

Which of the following is the correct IUPAC name for the compound CH3-CH(CH3)-C(CH3)2-COOH?

Step 1: Identify the longest carbon chain in the compound. Count the number of carbon atoms in the chain.
Step 2: The longest chain has 5 carbon atoms, which means it is a pentanoic acid.
Step 3: Identify the functional group. The compound has a carboxylic acid group (-COOH) at the end of the chain.
Step 4: Number the carbon chain starting from the end closest to the carboxylic acid group. This gives the carboxylic acid the lowest possible number.
Step 5: The carboxylic acid is on carbon 1, and the longest chain is numbered as follows: 1 (COOH), 2 (methyl group), 3, 4, 5.
Step 6: Identify any substituents. There is a methyl group on the second carbon.
Step 7: Combine the information: The compound is 3-Methyl-2-pentanoic acid, where '3-Methyl' indicates the position of the methyl group and '2-pentanoic acid' indicates the main chain and functional group.

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