Cannizzaro Reaction of Formaldehyde
2HCHO + NaOH → HCOONa + CH3OH
Visão geral
In the Cannizzaro reaction, two molecules of a non-enolizable aldehyde undergo disproportionation in the presence of strong base. One molecule is oxidized to a carboxylate salt while the other is reduced to an alcohol. Formaldehyde disproportionates to sodium formate and methanol.
Participantes
| Papel | Substância | Coeficiente | Estado |
|---|---|---|---|
| Reagente | Sodium Hydroxide NaOH | 1 | (aq) |
| Reagente | Formaldehyde CH₂O | 2 | (aq) |
| Produto | Methanol CH₃OH | 1 | (l) |
Exemplo do cotidiano
The Cannizzaro reaction demonstrates that oxidation and reduction can occur simultaneously between identical molecules (disproportionation).
Importância industrial
A reação de Cannizzaro cruzada do formaldeído com outros aldeídos produz poliois como o pentaeritritol, utilizado em resinas alquídicas e explosivos (PETN).
Propriedades
- Tipo
- Organic
- Reversível
- Não
- Energia
- Exotérmico
- ΔH
- -60,0 kJ/mol
Reações relacionadas
Swern Oxidation
Oxidation of Secondary Alcohol to Ketone
Claisen Condensation (Ethyl Acetate)
Kolbe Electrolysis
Baeyer-Villiger Oxidation
Beckmann Rearrangement (Cyclohexanone Oxime)
Catalytic Hydrogenation of Ethylene
Condensation Polymerization (Nylon 6,6)
Cope Rearrangement
Epoxidation of Alkenes (mCPBA)
Frequently Asked Questions
What is the equation for Cannizzaro Reaction of Formaldehyde?
The balanced equation is: 2HCHO + NaOH → HCOONa + CH₃OH.
What type of reaction is Cannizzaro Reaction of Formaldehyde?
Cannizzaro Reaction of Formaldehyde is a organic reaction.
Is Cannizzaro Reaction of Formaldehyde exothermic or endothermic?
Cannizzaro Reaction of Formaldehyde is exothermic (releases energy). The enthalpy change (ΔH) is -60.0 kJ/mol.