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→Types of cycloaddition: Note cat, and cheletropic reactions, tie in a huge number of spin-off articles on DA reaction |
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===Cheletropic reactions===
[[Cheletropic reaction]]s are a subclass of cycloadditions. The key distinguishing feature of cheletropic reactions is that on one of the reagents, both new bonds are being made to the same atom. The
:[[File:Cheletropic reaction of butadiene with SO2.svg|150px]]
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