DIOXYGEN DIFLUORIDE Property

Melting point:

-154°C (119 K); Early prepns, described as brown gas, red liq and orange solid (mp -163.5°), probably contained other fluorine-oxygen compounds as impurities: Goetschel et al., loc. cit

Boiling point:

-56.12°C (estimate)

Density 

3.071g/L [LID94]

form 

gas, stable only at low temperature

color 

red-orange solid, unstable gas

Safety

RIDADR 

3310

HazardClass 

2.3

Hazard and Precautionary Statements (GHS)

DIOXYGEN DIFLUORIDE Chemical Properties,Usage,Production

Chemical Properties

thermally unstable gas at room temp; pale yellow solid or yellow liquid; enthalpy of vaporization 19.1kJ/mol; produced by reacting O2 and F2 at cryogenic temperatures in an electrical discharge [KIR78] [MER06] [CRC10]

Definition

ChEBI: Dioxygen difluoride is a fluorine oxide.

Preparation

O2+F2 = O2F2
The gases are electrically excited in a discharge tube cooled with liquid nitrogen, and the unstable O3F3 thus formed is frozen out.