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Which of the following is the correct structure for 2-butyne?

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Question: Which of the following is the correct structure for 2-butyne?

Options:

  1. CH3-C≡C-CH3
  2. CH3-CH≡C-CH3
  3. CH3-C=C-CH3
  4. C≡C-CH2-CH3

Correct Answer: CH3-CH≡C-CH3

Solution: 

2-butyne has the structure CH3-CH≡C-CH3, with the triple bond between the second and third carbon.

Which of the following is the correct structure for 2-butyne?

Practice Questions

Q1
Which of the following is the correct structure for 2-butyne?
  1. CH3-C≡C-CH3
  2. CH3-CH≡C-CH3
  3. CH3-C=C-CH3
  4. C≡C-CH2-CH3

Questions & Step-by-Step Solutions

Which of the following is the correct structure for 2-butyne?
  • Step 1: Identify the name of the compound, which is 2-butyne.
  • Step 2: Understand that 'butyne' indicates a four-carbon chain with a triple bond.
  • Step 3: Recognize that the '2-' prefix means the triple bond is located between the second and third carbon atoms.
  • Step 4: Write the four carbon atoms in a chain: C-C-C-C.
  • Step 5: Add the triple bond (≡) between the second and third carbon atoms: C-C≡C-C.
  • Step 6: Add hydrogen atoms to each carbon to satisfy their bonding requirements: CH3-CH≡C-CH3.
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