Organic Ozonides – How They Form, How They React

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organic ozonidesAs you might guess, organic ozonides may be derived from ozone. So let’s first consider the nature of ozone. The ozone molecule, O3 is bent and unstable. It is polarized and is quick to react with unsaturated molecules, notably alkenes and alkynes. The image provided illustrates the result. What, however, is the mechanism producing the result in a typical case?¹

organic ozonides mechanism

Initially, all three oxygen molecules add to the alkene on the same side of what was previously a double bond. This structure, however, is a transient intermediate, which rearranges to form the ozonide structure. Ozonides are relatively stable. However, they can be readily split to yield a pair of carbonyl compounds.

Organic Ozonides in Synthesis

Some ozonides are explosive, so they are seldom isolated. However, ozonides can be made to undergo a number of useful synthetic reactions. A few of these are illustrated in our third image.

sample reactions

1The organic chemist all too often experiences factors that alter a “typical case”.

Note: You might also enjoy Ozone – the Other Oxygen


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