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In chemistry dioxirane is a [1] most notably in the Shi epoxidation reaction. A relatively stable dioxirane in common use is dimethyldioxirane (DMDO) which is derived from acetone.
Dioxirane is highly unstable and the majority of studies of it have been computational; it has been detected during the low temperature (-196°C) reaction of ethylene and ozone,[2] although even at these temperatures such a mixture can be explosive.[3] Its formation is thought to be radical in nature, preceding via a Criegee intermediate. Microwave analysis has indicated C-H, C-O and O-O bond lengths of 1.090, 1.388 and 1.516 Å respectively.[3] The very long and weak O-O bond (c.f. hydrogen peroxide O-O = 1.47 Å) is the origin of its instability.
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