Difluorodioxirane (CF2O2) is a rare, stable member of the dioxirane family, known for a single oxygen-oxygen bond (O-O).

Unlike most dioxiranes that decompose quickly, difluorodioxirane is surprisingly stable at room temperature, making it potentially useful for further research and applications.

Difluorodioxirane was first synthesised by Russo and DesMarteau in 1993 by treating fluorocarbonyl hypofluorite (FCOOF) with X2 (= F2, Cl2 or ClF) over pelletized CsF in a flow system.

[4][5] Unlike most dioxiranes that decompose quickly, difluorodioxirane is surprisingly stable at room temperature[6] due to the stabilising interacton of two fluorine atoms with the ring.

[8] Despite its increased stability, difluorodioxirane can still act as an oxidizing agent, transferring oxygen to other molecules.