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MHT CET202521 Apr 2025Evening ShiftChemistryGeneral Organic ChemistryActual

What is IUPAC name of following compound?

Options

  1. A3-Bromo-4-ethylbut-3-ene
  2. B3-Bromo-4-methylhex-3ene
  3. C4-Bromo-3-methylhex-3-ene
  4. D4-Bromo-4-ethyl-3-methylbut-3-ene

Correct answer

B. 3-Bromo-4-methylhex-3ene

Step-by-step solution

IUPAC name determination for substituted alkene: The compound's expanded structure is CH₃-CH₂-C(CH₃)=C(Br)-CH₂-CH₃ . The longest chain containing the double bond consists of 6 carbons, making hexene the parent hydrocarbon. The double bond position is fixed at carbon 3 regardless of numbering direction. Numbering from right to left gives substituents at positions 3 (bromo) and 4 (methyl), while left to right numbering yields positions 3 (methyl) and 4 (bromo). Alphabetical priority of 'bromo' over 'methyl' determine

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