Pentaoxygen difluoride is a binary inorganic compound of fluorine and oxygen with the chemical formula . The compound is one of many known oxygen fluorides.
The compound can be prepared by electric discharges through the â mixture of the certain molar ratio at 60 to 77K. The ratio is predicted to be 5:2.
Pentaoxygen difluoride is an oxidizing agent. At 90K, the compound looks like a reddish-brown liquid and as an oil at 77 K.
At 77K, the compound is insoluble in liquid, soluble in liquid and . At 65K, it is soluble in liquid .