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What is the IUPAC name for the compound CH3-CH2-CH2-CH2-COOH?

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Question: What is the IUPAC name for the compound CH3-CH2-CH2-CH2-COOH?

Options:

  1. Pentanoic acid
  2. Butanoic acid
  3. Hexanoic acid
  4. Heptanoic acid

Correct Answer: Pentanoic acid

Solution: 

The longest carbon chain contains five carbons, and the functional group is a carboxylic acid, hence the name is Pentanoic acid.

What is the IUPAC name for the compound CH3-CH2-CH2-CH2-COOH?

Practice Questions

Q1
What is the IUPAC name for the compound CH3-CH2-CH2-CH2-COOH?
  1. Pentanoic acid
  2. Butanoic acid
  3. Hexanoic acid
  4. Heptanoic acid

Questions & Step-by-Step Solutions

What is the IUPAC name for the compound CH3-CH2-CH2-CH2-COOH?
  • Step 1: Identify the carbon chain in the compound CH3-CH2-CH2-CH2-COOH.
  • Step 2: Count the number of carbon atoms in the longest chain. There are 5 carbon atoms.
  • Step 3: Recognize that the functional group COOH is a carboxylic acid.
  • Step 4: Use the prefix for 5 carbon atoms, which is 'pent'.
  • Step 5: Combine the prefix with the suffix for carboxylic acids, which is 'anoic acid'.
  • Step 6: Put it all together to get the IUPAC name: Pentanoic acid.
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