Materials cesium fluoride

Cesium perchlorate [13454-84-7], CsClO, mol wt 232.35 and theoretical cesium content hi.25/q, is a crystalline powder that decomposes at 250°C Cesium fluoride [13400-13-0], CsF, mol wt 151.90, theoretical cesium content 87.49%, has a melting point of 682—703°C and a boiling point of 1253°C. Cesium fluoride is an extremely hygroscopic, colorless, crystalline soUd it has a solubUity of 3.665 kg/L of water at 18°C. Cesium fluoride is made by exactly neutrali2ing cesium hydroxide with hydrofluoric acid and evaporating the resultant solution to dryness at 400°C. Excess HE results in a bifluoride salt that does not decompose at 400°C, and carbonate in the starting material gives an alkaline product. 

The Cs2 [Pt(CN)4 ] -H20 and Rb2 [Pt(CN)4 ] 1.5H2 0 starting materials for these preparations are synthesized as described by Maffly et al.3 and Koch et al.,4 respectively. The cesium fluoride and rubidium fluoride are 99.9% pure. All other chemicals are ACS reagent grade. Distilled water is used throughout the procedures. 

The bis(triflates) can be employed as crude materials immediately after their preparation from aldehydes. The advantages of this method are the easy handling of the fluorinating agent and the mild reaction conditions. Other fluorinating agents, such as tetrabutylammonium fluoride or cesium fluoride/18-crown-6. cleave the S —O bonds of the bis(triflates) and thus produce the starting aldehyde. A variation of this method allows the synthesis of 1-fluoro-l-haloalkanes (see Section 1.1.5.4.). ... 

The preparation of CsPtF from Xe PtF i.o in iodine pentafluoride.—An experiment similar to the above, involving interaction between material of composition Xe(PtFe)2 and cesium fluoride in iodine pentafluoride, produced an orange-yellow solid. X-ray powder photographs of which identified it as cesium hexafluoroplatinate(V). The rhombohedral unit cell a, 5.27 A., a, 96°25 being very similar in dimensions to those reported for cesium hexafluoroiridate(V) and osmate(V) [5]. 

The diamagnetic brick-red solid of composition XePt2Fio, formed along with xenon tetrafluoride in the pyrolysis of Xe(PtF6)i.8, contains the platinum in the -f-4 oxidation state, since interaction of the material with cesium fluoride in iodine pentafluoride gives a yellow product. X-ray powder photographs of which... 

Carbanion equivalents with anion stabihzing groups are prepared by desilylation of the corresponding materials with cesium fluoride [9-15]. In Scheme 2.6 treatment of aryltrimethylsilanes with cesium fluoride affords carbanion equivalents which add to the carbonyl compounds. The reactive species are not simple organocesium compounds but react as nucleophilic carbanion equivalents. 

However, there are literally thousands of organic compounds and polymers that are possible in the world of organic chemistry that may resolve some existing problems and expand the applications for OLEDs. Eurther, the emitting properties and efficiencies of these materials may be augmented by adding phosphorescent dopants, metal ions, or salts such as lithium fluoride or cesium fluoride. 

Predict the unit cells for the following materials (a) potassium bromide, KBr (b) cesium fluoride, CsF (c) barium oxide, BaO. 

Due to the above requirements, typical optically-transparent materials, such as oxides (glass, quartz, alumina, zirconium oxide etc.) and halides (sodium chloride, lithium fluoride, calcium fluoride, potassium bromide, cesium bromide etc.) are usually unsuitable for use with fluoride melts. Therefore, no standard procedure exists at present for the spectral investigation of fluoride melts, and an original apparatus must be created especially for each particular case. 

Trace element retention on earth materials is illustrated in several case studies, where selected contaminants (e.g., fluoride, cesium, mercury) interact with rocks, clays, soils, and sediments under different environmental conditions (e.g., pH, presence of organic ligands, salinity). 

An efficient synthesis of hexafluorobut-2-yne25,26 combined the knowledge that hexafluorocy-clobutene thermally rearranges to hexafluorobuta-1,3-diene (vide supra) and that cesium or potassium fluoride isomerize dienes to alkynes (see Section 5.1.2.3.). Thus, when hexafluoro-cyclobutene is passed over cesium or potassium fluoride at 590-600 C, hexafluorobut-2-yne is obtained in yields up to 90%, with 95% recovery of material. 

ARSENIC (7440-38-2) Finely divided material forms explosive mixture with air. Decomposes on contact with acids or acid fumes, emitting fumes of arsenic. Contact of dust or powder with strong oxidizers can cause ignition or explosion. Violent reaction with bromine azide, bromine pentafluoride, bromine trifluoride, dichlorine oxide, hypochlorous acid, nitrogen trichloride, tribromamine hexaammoniate, nitrogen oxyfluoride, potassium chlorate, potassium dioxide, powdered rubidium, silver fluoride. Incompatible with strong acids, cesium acetylene carbide, chromic acid, chromium trioxide, hafnium, halogens, lead monoxide, mercury oxide, nitryl fluoride, platinum, potassium nitrate, silver nitrate, sodium chlorate, powdered zinc. 

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