The IUPAC name of CH_3COCH(CH_3)_2 is

JEE Main 2003 Chemistry question

The IUPAC name of is

(1)2-methyl-3-butanone
(2)4-methylisopropyl ketone
(3)3-methyl-2-butanoneCorrect
(4)Isopropylmethyl ketone

Answer: (3)

Solution

The chain CH_3-CO-CH(CH_3)-CH_3 has four carbons; numbering to give the carbonyl the lowest locant puts C=O at C-2 and the methyl at C-3: 3-methyl-2-butanone

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Question ID VK-038172