Ester nomenclature from structural formula

Steps:

• Identify the acid part: CH3COO- comes from ethanoic acid (CH3COOH), so the name ends in "ethanoate".
• Identify the alcohol part: -OCH2CH2CH3 is the propyl group from propanol (CH3CH2CH2OH).
• Combine: The ester is named as alkyl alkanoate, so propyl ethanoate.
• Verify formula: CH3COOCH2CH2CH3 matches propyl ethanoate.

Why C is correct:

• Propyl ethanoate follows IUPAC rules: "propyl" from the C3H7- alcohol chain, "ethanoate" from the CH3COO- acid group.

Why the others are wrong:

• A: Ethyl propanoate has ethyl (C2H5-) group and propanoate (C2H5COO-) from propanoic acid.
• B: Methyl propanoate has methyl (CH3-) group and propanoate from propanoic acid.
• D: Propyl methanoate has correct propyl but methanoate (HCOO-) from methanoic acid.

Final answer: C