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What is the IUPAC name of the compound CH≡C-CH2-CH3?

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Question: What is the IUPAC name of the compound CH≡C-CH2-CH3?

Options:

  1. 1-butyne
  2. 2-butyne
  3. 1-pentyne
  4. 3-pentyne

Correct Answer: 1-butyne

Solution: 

The IUPAC name of CH≡C-CH2-CH3 is 1-butyne.

What is the IUPAC name of the compound CH≡C-CH2-CH3?

Practice Questions

Q1
What is the IUPAC name of the compound CH≡C-CH2-CH3?
  1. 1-butyne
  2. 2-butyne
  3. 1-pentyne
  4. 3-pentyne

Questions & Step-by-Step Solutions

What is the IUPAC name of the compound CH≡C-CH2-CH3?
Correct Answer: 1-butyne
  • Step 1: Identify the longest carbon chain in the compound. In CH≡C-CH2-CH3, the longest chain has 4 carbon atoms.
  • Step 2: Determine the type of bond present. The '≡' symbol indicates a triple bond between the first two carbon atoms.
  • Step 3: Number the carbon chain starting from the end closest to the triple bond. This gives us the following numbering: 1 (triple bond) - 2 - 3 - 4.
  • Step 4: Use the IUPAC naming conventions. Since there is a triple bond, we use the suffix '-yne'.
  • Step 5: Combine the number of the first carbon with the suffix. The first carbon with the triple bond is at position 1, so we name it '1-butyne'.
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