Identify the correct IUPAC name for . — IUPAC and Nomenclature Chemistry Question
Question
Identify the correct IUPAC name for $CH_3-CH_2-CH_2-C(=CH_2)-CH_2-CH_3$.
Answer: B
💡 Solution & Explanation
The principal chain MUST contain the double bond. The longest chain including the $C=C$ double bond has 5 carbons (start from $=CH_2$ as C1, go through the 3-carbon chain to get 5 carbons). The ethyl group is at C2. Thus, 2-Ethylpent-1-ene.
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