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The IUPAC name of the compound shown (\(\mathrm{CH_3CH_2{-}CO{-}COOH}\)) is

Question and options

The IUPAC name of the compound shown (CH3CH2−CO−COOH\mathrm{CH_3CH_2{-}CO{-}COOH}) is
Figure
  1. 2-oxobutanoic acid
  2. 3-oxobutanoic acid
  3. 3-oxo-2-propanoic acid
  4. 2-oxopropan-1-oic acid

Answer and explanation

Correct answer: A - 2-oxobutanoic acid
The structure is CH3CH2−CO−COOH\mathrm{CH_3CH_2{-}CO{-}COOH}: a 4-carbon chain with COOH as C1 and a ketone at C2, so 2-oxobutanoic acid. 3-oxobutanoic acid would be CH3COCH2COOH\mathrm{CH_3COCH_2COOH}.

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