See image — IUPAC and Nomenclature Chemistry Question

💡 Solution & Explanation

Concept: Mixed anhydrides are named by listing the two parent acids in alphabetical order, followed by the word 'anhydride'. Step 1: Identify the two acyl groups in the structure. - CH3-CO- is the acyl group derived from ethanoic acid (acetic acid, CH3COOH). - CH3-CH2-CO- is the acyl group derived from propanoic acid (propionic acid, CH3CH2COOH). Step 2: The compound shown is CH3-CO-O-CO-CH2-CH3, which is a mixed anhydride formed from ethanoic acid and propanoic acid. Step 3: Apply IUPAC naming rules for mixed anhydrides. The two acid names are listed in alphabetical order: 'ethanoic' comes before 'propanoic' alphabetically (E before P). Step 4: Therefore the name is 'ethanoic propanoic anhydride'. Why other options fail: - (b) 'Propanoic ethanoic anhydride' lists the acids in reverse alphabetical order, which is incorrect per IUPAC convention. - (c) '1-Ethanoyloxypropanone' incorrectly treats the compound as an ester-ketone rather than an anhydride. - (d) '3-Ethanoyloxypropan-3-one' is similarly an incorrect ester-ketone designation. Therefore, the correct answer is A.