Which of the following is the correct IUPAC name for CH3-CH(CH3)-CH2-CH3?

Practice Questions

Q1
Which of the following is the correct IUPAC name for CH3-CH(CH3)-CH2-CH3?
  1. 2-methylbutane
  2. 3-methylbutane
  3. 2-pentene
  4. 3-pentene

Questions & Step-by-Step Solutions

Which of the following is the correct IUPAC name for CH3-CH(CH3)-CH2-CH3?
  • Step 1: Identify the longest continuous chain of carbon atoms in the molecule CH3-CH(CH3)-CH2-CH3.
  • Step 2: Count the number of carbon atoms in the longest chain. In this case, there are 4 carbon atoms.
  • Step 3: Number the carbon atoms in the chain starting from the end closest to a substituent (branch).
  • Step 4: Identify any substituents (branches) attached to the main chain. Here, there is a methyl group (CH3) attached to the second carbon.
  • Step 5: Combine the position of the substituent with the name of the longest chain. The longest chain is called 'butane' because it has 4 carbons.
  • Step 6: Since there is a methyl group on the second carbon, the full name becomes '2-methylbutane'.
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