JAMB Chemistry 2013 Objective — Question 49

Question 49 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2013 Objective paper, with the correct answer and a full explanation.

The IUPAC nomenclature for the compound CH3-C(CH3)(H)-CH2-CH=CH2 above is

A. 2-methylpent-1-ene
B. 2-methylpent-4-ene
C. 4-methylpent-1-eneCorrect
D. 4-methylpent-2-ene

Explanation

The longest continuous chain has five carbon atoms with a double bond starting at the first carbon atom. The parent name is pent-1-ene, with a methyl attachment on carbon-4. Hence the complete name is 4-methylpent-1-ene.

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