Lesson eLearning

Choose the correct IUPAC name for the compound .

easy MCQ 1 mark Class 12 · Chemistry · Amines
  1. 1‑aminobutane
  2. 2‑aminobutane
  3. 3‑aminobutane
  4. butan‑1‑amine
Answer
2‑aminobutane

The correct answer is 2‑aminobutane — Among the options, the correct name is 2‑aminobutane.

Step-by-step solution

  1. Identify the longest continuous carbon chain containing the –NH2 group; it has four carbon atoms, so the parent hydrocarbon is butane.
  2. Number the chain so that the –NH2 substituent gets the lowest possible locant; numbering from the left gives the –NH2 on carbon‑2.
  3. Replace the –NH2 suffix with "‑amine" and indicate the position as a prefix: butan‑2‑amine, which is equivalent to 2‑aminobutane.
  4. Among the options, the correct name is 2‑aminobutane.
Common mistake: Choosing the –NH2 position without first assigning the longest chain and lowest locant.

Concept tested: IUPAC naming of aliphatic primary amines

Published · How this solution was prepared and checked

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