Caesium hydroxide

Cadmium sulphide pigments, respirable dust, as Cd Caesium hydroxide... 

It is not hydrolysed by water but reacts quantitatively with NaOH to yield sodium perchlorate and fluoride. It oxidizes iodides to iodine. Perchloryl fluoride reacts with ammonia to yield ammonium perchlorylamide NH4NHCIO3 [45a]. It reacts with potassium and caesium hydroxide to yield crystalline precipitates of K2NCIO3 and CS2NCIO3. It is isomorphous with metal sulphates, is explosive and very sensitive to flame, shock and friction. 

Caesium Niobium Fluoride, CsF.NbFs or CsNbF6, is obtained in fine needles by repeated crystallisation of csesium niobium oxyfluoride, CSjNbOFj, from hydrofluoric acid.2 Another csesium niobium fluoride having the probable composition 7CsF.NbFs or Cs7NbF5 has been prepared by the action of a solution of caesium hydroxide in hydrofluoric add on niobic acid in the same solvent.3... 

Caesium Arsenate.—By adding excess of arsenic to a solution of caesium hydroxide in nitric acid containing a little molybdic acid, white well-defined crystals of composition Cs20.2As205.5H20 have been obtained.4... 

Caesium hydroxide, CsOH.—The hydroxide is produced by the action of the metal on water, or of the sulphate on barium hydroxide. It is a solid, melting at 272-3° C., its latent heat of fusion per mol. being 1 609 Cal.5 It is extremely deliquescent, and dissolves in water with evolution of much heat, the heat of solution being 16-423 Cal.6 At 30° C. the saturated solution contains 75-08 per cent, of the base.7 A monohydrate, melting at 180° C., has been isolated.8 The heat of formation of the anhydrous compound from its elements is 101-03 Cal.9... 

Caesium ferrocyanide, Cs4Fe(CN)6+( )6H20, has been prepared by neutralising hydrogen ferrocyanide with caesium hydroxide.4... 

The rubidium hydroxide of commerce is a monohydrated rubidium hydroxide, RbOH.H20, which melts at 145°, and at 350° it is completely dehydrated to RbOH. At a higher temp, it begins to peroxidize and attack the crucible. The heat of soln. of the monohydrate is 3 702 Cals, at 15°. The commercial caesium hydroxide is likewise a mouohydrated ceesiuiti hydroxide, CsOH.HgO it melts at 180°, and is completely dehydrated between 400° and 500°, and at the same time the mass begins to peroxidize. To prepare the pure hydroxide, it must be dehydrated in a current of dry hydrogen at 500°. The heat of soln. of the monohydrate is 4 317 at 15°. 

Rubidium, caesium, and mixed potassium/rubidium and rubidium/caesium salts were obtained by treating bis(phosphoryl)amides, (Ar0)2(0)PNHP(0)(0Ar)2, with the appropriate alkali metal carbonates or their mixtures. The caesium salts can also be obtained with caesium hydroxide.58-60... 

Through the application of high-temperature Na and Cs MAS NMR, the mobility of sodium and caesium ions in dehydrated zeolites Y and X in the sodium form, after exchange with caesium cations and after impregnation with caesium hydroxide, has been investigated. "... 

Some of the other catalysts are excellent hydroxyl group alkoxylation catalysts but are very expensive, for example, polyphosphazenium catalysts [34-38], aluminium tetraphenyl porphine [42-47] and caesium hydroxide [18-24, 48]. 

Caesium hydroxide Caesium hydroxide, solution Cesium hydrate Cesium hydroxide Cesium hydroxide (Cs(OH)) EINECS 244-344-1 NSC 121987 UN2681 UN2682. Electrolyte in alkaline storage batteries (especially at subzero temperatures), polymerization catalyst for siloxanes. Yellow-white crystals mp = 272° d = 3.68 LDso (rat ip) = 100 mg/kg. Atomergic Chemetals Cabot Carbon Ltd. Cerac Noah Chem. Sigma-Atdrich Fine Chem. 

Yamato. T. Zhang, F. Yasumatsu. M. Isolation of a cyclic octainer in the caesium hydroxide catalysed ealixarene condensation of a dihydroxybiphenyl. J. Chem. Res. Synop. 1997. 466. 

The chemical reactions to conjugate amino acids or peptides with polystyrenes and other supports naturally depend on the type of functional sites on the gel phase. In most cases, chloromethyl groups are used to bind the starting N-protected amino acid - which is the C-terminal one of the target sequence to be synthesized — to the insoluble but swollen polymer. To date this is most efficiently done by utilizing caesium salts of the carboxylic components [84], which are simply prepared with caesium bicarbonate or hydroxide. To prevent base catalyzed racemization and side reactions on the polymer like saponification of ester bonds or of chloromethyl functions by caesium hydroxide not neutralized, N-pro-tected amino acids are used in a slight excess. 

Bowsher, B. R., Dickinson, S. The interaction of caesium hydroxide vapour with iron and ferric oxide (Fe203) powders at 760 °C. Report AEEW-M 2262 (1985)... 

This behaviour is explained by low first ionization energy, low electronegativity and low electron affinity and large atomic radius. Reactive metals form very basic oxides. So caesium oxide is expected to react with water to form caesium hydroxide, which is expected to be fully soluble and completely ionized in water. 

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