Some reactions of ammonium or hydrazinium fluorides with xenon difluoride or xenon hexafluoride

The reactions between ammonium fluoride, hydrazinium(1+) fluoride, hydrazinium(2+) fluoride and XeF₂ or XeF₆ were studied. It was found that Xe, HF, N₂ were formed in these reactions. Interestingly enough, beside of these gases nitrogen fluorides in different quantities were formed also. The courses and the products of the above reactions are compared with analogous reactions with KrF₂.     

Reactions of xenon difluoride. Part 6. Some reactions of phosphorus,arsenic and iodine compounds

The reaction of XeF₂ with some organo-phosphorus, -arsenic and-iodine compounds is described. The products were identified by fluorine nmr spectroscopy and the conditions under which fluorine exchange occurs were briefly investigated. Organoiodine (III) difluorides are suitable for the conversion of Ph₂Te to Ph₂TeF₂; the decomposition of RIF₂liberates IF and fluoroalkane.     

Reactions of aromatic compounds with xenon difluoride

Reactions of substituted benzenes C₆H₅R (R = Me, F, Cl, Br, CF₃, NO₂) with xenon difluoride in the presence of boron trifluoride–diethyl ether complex in weakly acidic (1,1,1,3,3-pentafluorobutane) and weakly basic media (acetonitrile) have been studied. These reactions lead to the formation of fluorobenzene derivatives FC₆H₄R (isomer mixture) together with isomeric difluorobenzenes and fluorinated and non-fluorinated biphenyls. The results have been compared with previously reported data obtained in other solvents using other catalysts.     

Reaction of fluorochloronitroacetic and difluoronitroacetic acids with xenon difluoride

Conclusions Dihalodinitromethanes are formed in the reaction of difluoronitroacetic and fluorochloronitroacetic acids with xenon difluoride.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 466–467, February, 1988.     

Hexagonal close packed krypton and xenon

Hexagonal close packed krypton and xenon were observed in vapour phase grown thin films. At 26 K, a₀ = 4.00 Å and c = 6.53 Å for Kr; a₀ = 4.34 Å and c = 7.09 Å for Xe.     

Fluorination with xenon difluoride. Reaction with halogenated hydrocarbons

Filler and coworkers [1-5] have demonstrated the utility of xenon difluoride as a selective fluorinating agent for aromatic hydrocarbons in the liquid phase, while Mackenzie and coworker [6] have fluorinated aromatic compounds in the vapour phase. We have developed a fluorination reaction of phenyl substituted olefins resulting in high yields of vicinal difluorides [7,8] and trifluoroacetates, depending on the catalyst. In our continued interest in the use of xenon difluoride as a mild fluorinating agent for fluorination of organic compounds, we have tries to fluorinate some heterocyclic ring systems, e.g. imidazo-(1,2-b)-pyridazine, under conditions similar of those used for fluorination of phenyl substituted olefins [7,8,9] (room temperature, methylene chloride as solvent, hydrogen fluoride as catalyst). It is well known that heteroaromatic compounds are less reactive toward electrophilic substitution reactions then aromatic hydrocarbon systems. However, it has been shown that bromination of imidazo-(1,2-b) -pyridazine results in 3-bromo products [10], while in chlorination with phosphorus pentachloride [11], the entering order of chlorine atoms is at position 3 > 2, 7 > 8 > 6 (Radical reactions).     

Reaction of the 3-nitrotriazole anion with xenon difluoride

Conclusions Xenon difluoride in acetonitrile is capable of oxidizing the anion of 3-nitro-1,2,4-triazole to form the corresponding radical.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 736–738, March, 1989.     

The vaporization properties of krypton and xenon

The vaporization properties of krypton and xenon are reassessed from the experimental results published in the literature, more sparsely since the 1970s. The measured vapour pressure and the saturated liquid density of both substances are adjusted to empirical, reliable equations. Results are presented for the calculated vapour pressures and the orthobaric densities of the two substances. The coordinates of the triple point, the normal boiling temperature, and the critical point are discussed as well as the corresponding values of the enthalpies of vaporization. Argon, for which recent experimental, accurate work has been published, was kept out of the present review.     

Oxidation of nitroxyl radicals by xenon difluoride

Conclusions Oxoammonium fluorides have been prepared for the first time by oxidizing nitroxyl radicals with xenon fluoride. Nitroso compounds are formed in the oxidation of piperidinoxyl radicals.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 572–576, March, 1978.     

Recent studies on ruthenium pentafluoride : Its reaction with krypton difluoride

The reaction of RuF₅ with KrF₂, in anhydrous HF solution, was studied. The formations, the stabilities and the Raman spectra of the adducts will be presented.     

VUV spectra of the xenon fluorides

The absorption spectra of gaseous XeF₂, XeF₄, and XeF₆ have been accurately measured in the photon energy range from 6 to 35 eV with the use of the synchrotron radiation of DESY. The vibrational structure of several Rydberg transitions could be resolved. The spectra are interpreted and most of the structures could be assigned. From these data, information about the ionized species is obtained. The assignment of the first two IP's of XeF₄ is corrected.     

Xenon difluoride fluorination. IV. Photochemically initiated xenon difluoride fluorination of norbornene

Norbornene was selectively fluorinated with xenon difluoride by photochemical means. Unrearranged 2,3-difluoronorbornane isomers and acetonitrile solvent adducts were the exclusive products. This represents a novel example of controlled XeF₂ radical fluorination by light initiation.