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Inserir no projetop3101600Sistema de treinamento em reação de Cannizzaro e reação de benzaldeído com etileno glicol

Principle

In the first part of the experiment, benzaldehyde disproportionates under the effect of alkalis to alcohol-soluble benzyl alcohol and water-soluble benzoic acid that precipitates when the aqueous solution is acidified. In the second part, benzaldehyde reacts with ethylene glycol to form a cyclic acetal. This ethylene acetal is resistant against basic and oxidising reagents. In an acid medium, it once again splits up into its original products. It is because of these characteristics that cyclic acetals are used for blocking the carbonyl function in preparative, organic chemistry.

Tasks

  1. Show the Cannizzaro reaction of benzaldehyde under basic conditions. 
  2. Prepare benzaldehyde ethylene acetal from benzaldehyde with ethylene glycol.

 

What you can learn about

  • Cannizzaro reaction
  • Benzaldehyde
  • Acetals
  • Distillation
  • Micro distillation

Necessary accessories

  • Precision balance 620g/0.001g

 

Palavras-Chave: Sistemas de Treinamento | Sistemas Didáticos | Sistemas Educacionais | Kits Didáticos | Laboratório de Ensino | Kits Educacionais | Conjunto de Treinamento |Conjuntos Didáticos | Sistemas de Ensino | Equipamentos Didáticos | Equipamentos de Ensino | Laboratório Didático