With xenon

It can be seen that xenon has valencies or oxidation states of 2. 4, 6 and 8 compounds with xenon in higher oxidation states are... 

Reactions of Organic Compounds with Xenon Huondes Filler, R Isr J Chem 17, 71-79 56... 

Trimethylarsine gives a 98% yield of trimethylarsine difluoride when treated with xenon difluoride [102] in fluorotrichloromelhane. and tnsfpentafluorophen-yl)arsine gives a 94% yield of tris(pentafluornphenyl)arsme difluoride after reaction with dilute fluorine in fluorotnchloromethane at 0 C [106] Other trivalent arsenic compounds have also been fluorinated with xenon difluoride [103] In addition, arsines have been oxidatively fluorinated by iodine pentafluoride [107] or electrochemically in 26-34% yield [108]... 

Carboxylic acids react with xenon difluoride to produce unstable xenon esters The esters decarboxylate to produce free radical intermediates, which undergo fluonnation or reaction with the solvent system Thus aliphatic acids decarboxylate to produce mainly fluoroalkanes or products from abstraction of hydrogen from the solvent Perfluoro acids decarboxylate in the presence of aromatic substrates to give perfluoroalkyl aromatics Aromatic and vinylic acids do not decarboxylate [91] (equation 51)... 

Silyl enol ethers are fluonnated in high yields with xenon difluoride [62 93, 94 95] Applications of this reaction to the preparation of fluonnated... 

Preparation of 2-Fluoro-4-methylacetamlide, 166 Fluorination with A-ferf-Butyl-Al-fluorobenzenesulfonamide Preparation of 1-Fluoro-l-octene, 166 Fluorination with A-Fluoro-2,4,6-trimethylpyridinium Triflate Preparation of Diethyl Fluorophenylmalonate, 166 Fluorination with Xenon Difluoride... 

The second alternative that can be considered is incomplete thermal-ization. Initial excess energy in the C2H4 + as well as excitation owing to energy released in the condensation reactions may not be completely removed between reactive encounters with C2H4. The accumulation of energy will cause increased decomposition. In 0.1-torr ethylene and 10-torr xenon 100 collisions with xenon will occur between a collision with ethylene. The above interpretation of the results suggests that 100 collisions are not sufficient for thermalization. 

To examine the situation under simpler conditions, runs with xenon as sensitizer were made using low pressures of ethylene and NO. Two spectra are shown in Figure 16. The simplest spectrum is obtained with 25% NO. C4H8NO + and C2H5(NO)2+ dominate the spectrum. 

After a preliminary study by Mortenson and Leighton S the thorough study by Edwards, Day and Overman s is notable. They analysed solutions of spblCHj) in benzene, octane and CCI4 for non-volatile forms of °Bi. Similar analyses were made on gaseous Pb(CH3)4 at 10 mm pressure, both pure and diluted with He, Ne, At, Kr and Xe. In solution at concentrations over 5 mole percent, about 50% of the Bi remained in a volatile form on dilution to mole fraction 0.05, the retention fell to 18% and rose again to over 90% in very dilute solutions. The retention values in the gas phase were then practically a continuation of those in dilute solution—between 80% and 90% for the pure gas at 10 mm pressure. With helium as diluent, the retention reached its maximum of 97% and the values decreased slowly to about 90% with xenon. 

Chlorine, the next most electronegative element, reacts with xenon to form transient species that decompose at room temperature. Krypton forms KtF2 and a few other compounds, but the chemishy of krypton is much more restricted than that of xenon. 

FurukawaM, Kashiwagi S, Matsunaga N, Suzuki M, Kishimoto K, Shirao S. Evaluation of cerebral perfusion parameters measured by perfusion CT in chronic cerebral ischemia comparison with xenon CT. J Comput Assist Tomogr 2002 26 272-278. 

Fast atom bombardment with xenon or argon... 

Fig. 13.2 MBSL spectra from 2M-NaCl aqueous solution saturated with xenon at frequencies of 16 kHz (a) and 500 kHz (b). The sodium D lines exhibit asymmetric broadening [1] (Reprinted from the CSIRO Publishing. With permission)...

In the reaction of the pentaoxide with xenon tetrafluoride oxide to give xenon difluoride dioxide and nitryl fluoride, the xenon tetrafluoride oxide must be used in excess to avoid formation of xenon trioxide, which forms a sensitive explosive mixture with xenon difluoride dioxide. 

Oxidative fluorination of 3-iodo-4-methylfurazan 216 with xenon difluoride in an atmosphere of dry argon at 20 °C in anhydrous MeCN yielded the corresponding difluoroiodanyl azole 217 (Equation 42) <2004RCB1130>. 

As proposed S-14 is a very reactive electrophile, as demonstrated, firstly, by the thermal addition of nitrogen at 25 K to give 13 back, secondly, by the addition of CO to yield 2i/-imidazol-2-ylideneketene (15) (T-10 reacts in a similar fashion31), and thirdly, by formation of a complex 14-Xe of the carbene with xenon. In a xenon matrix complexes of this type were also found by Sander et al.37 for difluorovinylidene and by Maier and Lautz38 for C2. 

Oxidative Fluorination of Nitrones to a-Fluorosubstituted Nitroxyl Radicals Formation of nitroxyl radicals by the radical cation route was observed in reactions of various nitrones with xenon difluoride in dry methylene chloride (520, 523). In this reaction, more than 40 nitrones, including 4H -imidazole N,N -dioxides (219), 4H -imidazole TV-oxides (223) and (224), 2H -imidazole N -oxides (225), 2H -imidazole TV,TV-dioxides (226), 3,3,5,5-tetramethylpyrroline N -oxide (TMPO), derivatives of 3-imidazoline-3-oxides (231) and (232), have been examined. ESR spectra of nitroxyl radicals containing one or two fluorine atoms at a-C have been registered (Scheme 2.108) (523). In the case of... 

POLYMER SURFACE FLUORINATION WITH XENON DIFLUORIDE... 

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