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JAMB Chemistry 2010 Question 40

Question 40

Introduction to Organic Chemistry

CH3(CH2)3CH(C3H7)C2H5
The IUPAC nomenclature of the compound above is

Diagram for this question
  1. A.4-ethyloctane
  2. B.5-ethyloctane
  3. C.5-propylheptane
  4. D.3-propylheptane
Show the answer and explanation

Answer: A (4-ethyloctane)

Explanation

The longest chain runs from the butyl end through the CH into the propyl group: 8 carbons. Numbering from the propyl end puts the ethyl group on carbon 4: 4-ethyloctane.