Liquid oxygen difluoride

The use of liquid oxygen difluoride (40 or 90%) to stabilise liquid ozone as oxidant for gaseous hydrogen in a rocket motor was not entirely successful, explosions occurring at both concentrations. 

Electron Paramagnetic Resonance Spectrum of Liquid Oxygen Difluoride... 

Oxygen (Liquid) Charcoal Oxygen difluoride Non-metals Ozone Charcoal, Potassium iodide MRH (Gas) 8.95/27... 

Mixtures of silica gel and the liquid difluoride sealed in tubes at 334 mbar exploded above -196°C, presence of moisture rendering the mixture shock-sensitive at this temperature [1], Reaction of oxygen difluoride with silica, alumina, molecular sieve or similar surface-active solids is exothermic, and under appropriate conditions may be explosive [2], A quartz fibre can be ignited in the difluoride [3],... 

No interaction occurred at ambient temperature and at pressures up to 8 bar, but violent explosions occurred at low temperatures in the liquid phase, even in absence of the impurity oxygen difluoride. 

Oxygen (Gas), Carbon disulfide, Mercury, Anthracene, 4831 Oxygen (Liquid), Carbon, Iron(II) oxide, 4832 Oxygen difluoride, Hexafluoropropene, Oxygen, 4317 Potassium chlorate, Manganese dioxide, 4017 f Propionyl chloride, Diisopropyl ether, 1163 f Propylene oxide, Sodium hydroxide, 1225 Silver azide, 0023 Silver nitride, 0038 Sodium carbonate, 0552 Sodium peroxoborate, 0155 Tetrafluoroammonium tetrafluoroborate, 0133 Triallyl phosphate, 3184... 

Nitrosyl tetrafluorochlorate, 3985 Nitrous acid, 4435 Nitryl chloride, 4025 Nitryl fluoride, 4303 Nitryl hypochlorite, 4026 Nitryl hypofluorite, 4304 Nitryl perchlorate, 4029 Osmium hexafluoride, 4370 Osmium(VIII) oxide, 4858 Oxygen (Gas), 4831 Oxygen (Liquid), 4832 Oxygen difluoride, 4317 Ozone, 4846... 

The above book [1] deals, in 26 chapters in 5 sections, with theoretical and practical aspects of the use and safe handling of powerful oxidants and their complementary reactive fuels. Materials include nitrogen pentaoxide, perfluoroam-monium ion and salts, nitronium tetrafluoroborate, hydrazinium mono- and diperchlorates, nitronium perchlorate, tricyanomethyl compounds, difluoramine and its alkyl derivatives, oxygen difluoride, chlorine trifluoride, dinitrogen tetraoxide, bromine trifluoride nitrogen fluorides, and liquid ozone-fluorine system. 

Krypton is a rather dense, tasteless, colorless, odorless gas. Its critical temperature is between that of oxygen and carbon dioxide. It is extracted during fractional distillation of liquid oxygen at a temperature of about -63.8°C. At one time it was thought that krypton, as well as the other noble gases, were completely inert. However, in 1967 scientists were able to combine fluorine with krypton at low temperatures to form the compound krypton difluoride (KrFj). In this case krypton has a valence of 2. 

Western States Sect Combust Inst, Paper, WSCI 65-23 (1965) 27) G.R. Mistier T.F. Seamans, Vacuum ignition characteristics of flox/diborane and oxygen difluoride/diborane, NASA Contract Report 1969, NASA-CR-100678. Avail CFSTI. From SciTechAerosp Rep 7 (12), 2196 (1969) 28) W.B. Powell et al, ClFj-Njli, liquid propellant evaluation and rocket motor development, TechRept 32-305, Jet Propulsion Lab, Calif Inst Tech, Pasadena, Ca, (May 1963) (NASA N63-21722) 29) H. Allen, Jr Pinna, Relative ignitability of typical solid propellants with C1F3, NASA TN-D-1533, NASA, Wash, DC, (Jan 1963) (NASA N63-11616) 30) R.F. Sawyer et al, AIAA J, 6, 11, 2111 (1968) CA 70, 13118 (1969) 31) M.C. Branch ... 

Hexafluoropropene (29) can be oxidized in a similar way as tetrafluoroethene, but it can also be oxidized by different methods. Gas-phase oxidations generally lead to mixtures of products. A mixture of products is obtained in the photoinitiated oxidation of 29 with oxygen in both the liquid and gaseous state in addition to low conversions into perfluoro(2-methyloxirane) (30) and other volatile compounds, a clear viscous polymer is obtained as the major product.46 The oxidation at low temperatures gives the epoxide as the dominant product,47 but the conversion is only 24%. Epoxide 30 is obtained in moderate yield, among other products, when a mixture of hexafluoropropene and oxygen difluoride is irradiated with UV light.48 Without irradiation, the mixture does not react at room temperature.48... 

Dichlorine oxide Carbon, or Oxidisable materials Fluorine Non-metals Hydrogen peroxide Carbon Iodine heptafluoride Carbon Iodine(V) oxide Non-metals Nitrogen oxide Non-metals Nitrogen trifluoride Charcoal Oxygen difluoride Non-metals Oxygen (Liquid) Charcoal Ozone Charcoal, Potassium iodide... 

Nitrogen dioxide, 4720 Nitrogen oxide, 4719 Nitrosyl chloride, 4017 Nitrosyl fluoride, 4296 Nitrosyl perchlorate, 4021 Nitrosyl tetrafluorochlorate, 3979 Nitrosylsulfuric acid, 4432 Nitrous acid, 4429 Nitryl chloride, 4019 Nitryl fluoride, 4297 Nitryl hypochlorite, 4020 Nitryl hypofluorite, 4298 Nitryl perchlorate, 4023 Osmium hexafluoride, 4364 Osmium(VIII) oxide, 4852 Oxygen difluoride, 4311 Oxygen (Gas), 4825 Oxygen (Liquid), 4826 Ozone, 4840... 

Oxygen Difluoride Systems. The irradiation of liquid OF2 at 77° K. generally follows the lines established for NF3. The products are as shown below (unbalanced) ... 

Oxygen difluoride is a colorless, poisonous gas that condenses to a pale yellow liquid. It can be most efficiently prepared by the electrolysis of aqueous HF (equation 71). ... 

The reagent is prepared by passing fluorine gas into a 2% solution of sodium hydroxide. The effluent gas is a mixture of about equal parts of OFj and Oj. Merritt and Ruff trapped OFg out of the fluorine stream at liquid oxygen temperature, distilled off oxygen and fluorine, and so obtained material about 99% pure, which was stored at room temperature in large-volume glass bulbs. They found that oxygen difluoride oxidizes primary aliphatic amines smoothly at —78° in Freon 11 as solvent to the nitroso derivatives ... 

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