See image — IUPAC and Nomenclature Chemistry Question

💡 Solution & Explanation

Step 1 - Identify the functional group: The structure shows a carbonyl group (C=O) bonded to an oxygen atom (-O-), which is the ester functional group (-COO-). Step 2 - Identify the acyl portion: On the left side of the carbonyl, there is a methyl group (CH3-). This comes from ethanoic acid (acetic acid, CH3COOH), so the acyl part is the ethanoyl (acetyl) group, giving the 'ethanoate' portion of the name. Step 3 - Identify the alkyl portion: On the right side of the oxygen, there is an ethyl group (-CH2CH3). This gives the 'ethyl' portion of the name. Step 4 - Combine the name: Esters are named as alkyl alkanoates. The alkyl group is ethyl, and the acid-derived part is ethanoate (from ethanoic acid). Together: ethyl ethanoate. Step 5 - Verify the molecular structure: CH3COOC2H5 corresponds to ethyl ethanoate (also known as ethyl acetate), which matches the drawn structure exactly. Therefore, the correct answer is ethyl ethanoate.