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What is the IUPAC name for the compound with the structure CH3-CH2-CO-CH3?

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Question: What is the IUPAC name for the compound with the structure CH3-CH2-CO-CH3?

Options:

  1. Butan-2-one
  2. Propan-2-one
  3. Butan-1-one
  4. Pentanal

Correct Answer: Butan-2-one

Solution: 

The compound is a ketone with four carbons and the carbonyl group on the second carbon, hence it is Butan-2-one.

What is the IUPAC name for the compound with the structure CH3-CH2-CO-CH3?

Practice Questions

Q1
What is the IUPAC name for the compound with the structure CH3-CH2-CO-CH3?
  1. Butan-2-one
  2. Propan-2-one
  3. Butan-1-one
  4. Pentanal

Questions & Step-by-Step Solutions

What is the IUPAC name for the compound with the structure CH3-CH2-CO-CH3?
Correct Answer: Butan-2-one
  • Step 1: Identify the structure of the compound. The structure is CH3-CH2-CO-CH3.
  • Step 2: Count the number of carbon atoms in the compound. There are 4 carbon atoms.
  • Step 3: Determine the functional group. The compound has a carbonyl group (C=O), which indicates it is a ketone.
  • Step 4: Identify the position of the carbonyl group. The carbonyl group is on the second carbon in the chain.
  • Step 5: Name the longest carbon chain. The longest chain with the carbonyl group is butane (4 carbons).
  • Step 6: Combine the information to form the IUPAC name. Since the carbonyl group is on the second carbon, the name is Butan-2-one.
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