Procedure:

Synthesis of Benzoin

• Reaction
  • Use 50ml Erlenmyer beaker. Dissolve 1.5g of thiamine hydrochloride in 2 ml of water by swirling.
  • Add 15ml of 95% ethanol and swirl until homogeneous.
  • Add 4.5 ml of accuse sodium hydroxide solution (40 g of NaOH on 500ml H20) and swirl until pale yellow.
  • Add 4.5 ml benzaldehyde to mixture and swirl until homogeneous
  • Scratch inside of flask.
  • STOPPER and let stand in drawer until next lab, 3/24/01, after spring break
• Isolation of Crude Benzoin.
• Wash and Dry
• Determine m.p.

Synthesis of Benzil

• Reaction
• Isolation of Crude Benzil
• Recrystallization
• Wash and Dry
• Determine m.p.