JEE Main Chemistry question

The IUPAC name of CH₃–CH(OH)–CH=C(CH₃)–CHO is

(A)4-hydroxy-1-methylpentanal
(B)4-hydroxy-2-methylpent-2-en-1-alCorrect
(C)2-hydroxy-4-methylpent-2-en-5-al
(D)2-hydroxy-3-methylpent-2-en-5-al

Answer: (B)

Solution

Numbering must start at the aldehyde carbon (C1, principal characteristic group). This places the methyl-bearing alkene carbon at C2 (double bond C2=C3) and the hydroxyl-bearing carbon

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Question ID VK-138972