What is the IUPAC name for the compound with the formula C5H10O?

Practice Questions

Q1
What is the IUPAC name for the compound with the formula C5H10O?
  1. Pentanal
  2. 2-Pentanone
  3. 3-Pentanone
  4. Butanol

Questions & Step-by-Step Solutions

What is the IUPAC name for the compound with the formula C5H10O?
  • Step 1: Identify the molecular formula C5H10O. This indicates that the compound contains 5 carbon atoms, 10 hydrogen atoms, and 1 oxygen atom.
  • Step 2: Determine the type of compound. Since there is a carbonyl group (C=O) and the formula suggests it is a ketone, we know it is a ketone because it has a carbonyl group between two carbon atoms.
  • Step 3: Count the number of carbon atoms in the longest chain. There are 5 carbon atoms, so we start with 'pentane' as the base name.
  • Step 4: Identify the position of the carbonyl group. In a ketone, the carbonyl group is located on a carbon that is not at the end of the chain. For 5 carbons, the carbonyl can be on the 2nd, 3rd, or 4th carbon.
  • Step 5: Determine the correct position of the carbonyl group. The carbonyl group is on the 2nd carbon, so we name it '2-Pentanone'.
  • Step 6: Combine the information to write the IUPAC name. The final IUPAC name for the compound is 2-Pentanone.
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