Ozonolysis of Alkenes

R2C=CR2 + O3 → R2C=O + R2C=O

Descripción general

Ozone cleaves carbon-carbon double bonds to form carbonyl compounds (aldehydes and/or ketones). The reaction proceeds through a molozonide intermediate that rearranges to an ozonide, which is then reduced. Ozonolysis is used to determine alkene double bond positions by identifying the carbonyl fragments.

Ejemplo cotidiano

Ozonolysis is used in forensic chemistry to determine the structure of unknown alkenes by analyzing the fragments produced.

Importancia industrial

Aplicada en la síntesis industrial de aldehídos y cetonas a partir de alquenos naturales y petroquímicos.

Propiedades

Tipo
Organic
Reversible
No
Energía
Exotérmico
ΔH
-300,0 kJ/mol
Catalizador
Zn/AcOH or Me₂S (reductive workup)

Reacciones relacionadas

Epoxidation of Alkenes (mCPBA) Swern Oxidation Oxidation of Secondary Alcohol to Ketone E2 Elimination (Dehydrohalogenation) Claisen Condensation (Ethyl Acetate) Aldol Condensation of Acetaldehyde Kolbe Electrolysis Baeyer-Villiger Oxidation Beckmann Rearrangement (Cyclohexanone Oxime) Dehydration of Ethanol

Frequently Asked Questions

What is the equation for Ozonolysis of Alkenes?
The balanced equation is: R₂C=CR₂ + O₃ → R₂C=O + R₂C=O.
What type of reaction is Ozonolysis of Alkenes?
Ozonolysis of Alkenes is a organic reaction.
Is Ozonolysis of Alkenes exothermic or endothermic?
Ozonolysis of Alkenes is exothermic (releases energy). The enthalpy change (ΔH) is -300.0 kJ/mol.
What conditions are needed for Ozonolysis of Alkenes?
This reaction requires a catalyst (Zn/AcOH or Me₂S (reductive workup)).