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JEE Main202228 Jun 2022Evening ShiftChemistryGeneral Organic ChemistryActual

The correct IUPAC name of the following compound is

Options

  1. A4 -methyl- 2 -nitro- 5 -oxohept- 3 -enal
  2. B4 -methyl- 5 -oxo- 2 -nitrohept- 3 -enal
  3. C4 -methyl- 6 -nitro- 3 -oxohept- 4 -enal
  4. D6 -formyl- 4 -methyl- 2 -nitrohex- 3 -enal

Correct answer

C. 4 -methyl- 6 -nitro- 3 -oxohept- 4 -enal

Step-by-step solution

Aldehydic (-CHO) group has greater priority than keto group and nitro groups is always a prefix. Root word of the given compound is hept, double bond is the primary suffix and aldehydic group becomes secondary suffix and keto and nitro groups are prefixes. Hence, the correct IUPAC name of the given compound is 4-Methyl-6-nitro-3-oxohept-4-enal

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