Which of the following is the correct IUPAC name for CH3-C≡C-CH2-CH3?

Practice Questions

Q1
Which of the following is the correct IUPAC name for CH3-C≡C-CH2-CH3?
  1. 1-pentyne
  2. 2-pentyne
  3. 3-pentyne
  4. 1-butyne

Questions & Step-by-Step Solutions

Which of the following is the correct IUPAC name for CH3-C≡C-CH2-CH3?
  • Step 1: Identify the structure of the compound CH3-C≡C-CH2-CH3.
  • Step 2: Count the number of carbon atoms in the longest continuous chain. There are 5 carbon atoms.
  • Step 3: Determine the type of bond present. There is a triple bond (≡) between the second and third carbon atoms.
  • Step 4: Number the carbon chain starting from the end closest to the triple bond. This makes the triple bond start at the second carbon.
  • Step 5: Use the IUPAC naming rules. Since there are 5 carbons in the chain and the triple bond starts at the second carbon, the name is 2-pentyne.
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