Trifluoromethyl hypofluorite

Trifluoromethyl hypofluorite is an organofluorine compound with the formula . It exists as a colorless gas at room temperature and is highly toxic. It is a rare example of a hypofluorite (compound with an O−F bond). It is prepared by the reaction of fluorine gas with carbon monoxide:
The gas hydrolyzes only slowly at neutral pH.
Use in organic chemistry.
The compound is a source of electrophilic fluorine. It has been used for the preparation of α-fluoroketones from silyl enol ethers.
Behaving like a pseudohalogen, it adds to ethylene to give the ether: 