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MHT CET202522 Apr 2025Morning ShiftChemistryAlcohols Phenols and EthersActual

Hydroboration-oxidation of but-1-ene forms

Options

  1. AButanal
  2. BButanone
  3. CButan-1-ol
  4. DButan-2-ol

Correct answer

C. Butan-1-ol

Step-by-step solution

The hydroboration-oxidation reaction converts alkenes to alcohols via anti-Markovnikov addition . But-1-ene reacts with diborane in THF solvent, where boron adds to the less substituted carbon (C1) and hydrogen adds to C2, forming the organoborane intermediate CH₃-CH₂-CH₂-CH₂-BH₂ . Oxidation with hydrogen peroxide in aqueous sodium hydroxide replaces the boron with a hydroxyl group, yielding the primary alcohol butan-1-ol: CH₃-CH₂-CH₂-CH₂-OH . This anti-Markovnikov pathway contrasts with acid-catalyzed hydration, w

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