The IUPAC name of this compound is ________.
A)pentanamide
B)butyramide
C)butylamine
D)butanamide
E)propanamide

Question

The IUPAC name of this compound is ________. 
A)pentanamide 
B)butyramide 
C)butylamine 
D)butanamide 
E)propanamide

Quizplus · Accepted Answer

The compound contains 4 carbon atoms, so the parent chain should be butane. There is a carbonyl group attached to the second carbon atom, so the correct suffix is -amide. Thus, the IUPAC name is butanamide (D). 
Option A, pentanamide, has too many carbon atoms for the given compound. Option B, butyramide, refers to a compound with a 3-carbon chain and a carbonyl group, which is not in accordance with the given compound. Option C, butylamine, would be named as butan-1-amine according to IUPAC rules since the nitrogen atom takes a higher priority than the carbonyl group. Finally, option E, propanamide, has 3 carbons which contradict the structure of the given compound.

The IUPAC Name of This Compound Is ________