Ozonolysis of Alkenes

R2C=CR2 + O3 → R2C=O + R2C=O

概要

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.

日常の例

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

産業上の重要性

オレイン酸のオゾン分解はアゼライン酸（ポリマー合成用）とペラルゴン酸（除草剤）を生産する。医薬品合成にも使用される。

特性

タイプ
Organic
可逆的
いいえ
エネルギー
発熱性
ΔH
-300.0 kJ/mol
触媒
Zn/AcOH or Me₂S (reductive workup)

関連する反応

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)).