What is the IUPAC name for the compound CH3-CH2-CH(CH3)-CH2-Br?

Practice Questions

Q1
What is the IUPAC name for the compound CH3-CH2-CH(CH3)-CH2-Br?
  1. 1-bromo-3-methylbutane
  2. 2-bromo-3-methylbutane
  3. 3-bromo-2-methylbutane
  4. 1-bromo-2-methylbutane

Questions & Step-by-Step Solutions

What is the IUPAC name for the compound CH3-CH2-CH(CH3)-CH2-Br?
  • Step 1: Identify the longest carbon chain in the compound. Count the number of carbon atoms in the chain.
  • Step 2: The longest chain has 4 carbon atoms, so it is a butane.
  • Step 3: Identify any substituents (groups attached to the main chain). In this case, there is a bromine (Br) and a methyl (CH3) group.
  • Step 4: Number the carbon chain starting from the end closest to the substituent. This means starting from the end with the bromine.
  • Step 5: Assign numbers to each carbon in the chain. The bromine is on carbon 1, and the methyl group is on carbon 2.
  • Step 6: Combine the names of the substituents with the name of the main chain. The bromine is named as 'bromo' and the methyl group as 'methyl'.
  • Step 7: Write the IUPAC name by placing the substituents in alphabetical order before the main chain name. The final name is 2-methyl-1-bromobutane.
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