Ozonolysis vs Permanganate Cleavage of Alkenes | 8.9 Organic Chemistry

Chad presents the two common ways we carry out oxidative cleavage of alkenes: ozonolysis and permanganate cleavage.

Ozonolysis of Alkenes
He provides a simple method for predicting products and shows the difference between ozonolysis with oxidizing vs reducing conditions. Chad shows that the products of ozonolysis under reducing conditions are ketones and/or aldehydes in which dimethylsulfide (DMS) or zinc and water are used in the second step as a reducing agent. He then shows that the products of ozonolysis under oxidizing conditions are ketones and/or carboxylic acids in which hydrogen peroxide (H2O2) is used in the second step.

Oxidation of Alkenes with KMnO4
Finally, Chad concludes the lesson by showing how permanganate cleavage with hot, concentrated potassium permanganate (KMnO4) yields the same result as ozonolysis under oxidizing conditions.

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00:00 Lesson Introduction
00:31 Ozonolysis of Alkenes under Oxidizing and Reducing Conditions
04:06 Permanganate Cleavage of Alkenes

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