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NEET2019ChemistryAlcohols Phenols and EthersActual

array r CH ₃- CH ₂- CH = CH ₂ X CH ₃ CH ₂- CH ₂- CH ₂ OH array What is suitable reagent ( X ) ?

Options

  1. AH ₂ Pt
  2. BB ₂ H ₆ | THF , H ₂ O ₂ | OH ⁻
  3. CBr ₂ HCl
  4. DHBr H ₂ O ₂

Correct answer

B. B ₂ H ₆ | THF , H ₂ O ₂ | OH ⁻

Step-by-step solution

The suitable reagent x for the conversion, Butene CH ₃ CH ₂ CH = CH ₂ X Butanol CH ₃ CH ₂ CH ₂ CH ₂ OH is B ₂ H ₆ | THF , H ₂ O ₂ | OH . Alkenes react with diborane ( B ₂ H ₆ ) in presence of THF or diglyme to form alkyl borane (by hydroboration) which on oxidation gives alcohol. The reaction is known as hydroboration-oxidation reaction.

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