Reaction Summary

Reagents

  • Sodium tetrahydridoborate,

Conditions

  • Aqueous/alcoholic solution, room temperature

Catalyst

  • None

Chemical Equation

Equation

By-Products

  • None

Observations

Observations

  • No visible change (colourless liquid/solution throughout)

⚠️ 9701 Exam Notes / Pitfalls

Warning

  • Classic trap: supplies the nucleophile , which attacks the C of the polar C=O. The non-polar, electron-rich C=C repels nucleophiles, so it is left intact.
  • would reduce both — wrong reagent here.