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

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

Options:

Correct Answer: 2-pentyne

Solution:

The longest chain with the triple bond is 5 carbons long, and the triple bond starts at the second carbon, making it 2-pentyne.

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

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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