1. Draw the complete chemical reaction with the respective by-products, 2. identify what type of reaction it is, 3. the action of sodium cyanide and the reaction conditions. 4. Why is ethanol used as a solvent?

Procedure

A solution of sodium cyanide  in water  was added to a stirred solution of benzaldehyde in ethanol. The reaction mixture was refiuxed gently for half an hour and cooled in an ice bath. The precipitated product was filtered, washed with cold water, dried well and crystallized from ethanol to afford 85.0% of benzoin.

Transcribed Image Text:

H. NaCN, H,O OH H. NaCN, H,O OH