JEE Main Chemistry question

IUPAC name of the compound CH₃CH₂CH₂CH[CH(CH₃)₂]–CH(CH₃)–C(CH₂CH₃)₂–CH₂CH₃ is

(A)5-methyl-4-isopropyl-6,6'-diethyloctane
(B)3,3-dimethyl-3-ethyl-5-isopropyloctane
(C)3,3-diethyl-4-methyl-5-(1,1-dimethylethyl)octane
(D)3,3-diethyl-4-methyl-5-(1'-methylethyl)octaneCorrect

Answer: (D)

Solution

The longest chain is octane, with two ethyl substituents on C3 (making it quaternary), a methyl on C4, and an isopropyl [–CH(CH₃)₂, substitutively "1-methylethyl"] on C5. This gives

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Question ID VK-138964