The structure of a compound is shown - HSC - SSCE Chemistry - Question 3 - 2021 - Paper 1

To determine the preferred IUPAC name, we start by identifying the functional groups and the longest carbon chain in the compound. The compound features an amide group due to the presence of a carbonyl (C=O) linked to a nitrogen (N). The longest carbon chain has three carbon atoms, indicating a propanamide. The methyl group (–CH₃) is attached to the nitrogen, classifying it as N-methylpropanamide. Therefore, the correct IUPAC name for this compound is N-methylpropanamide.