Tellurium Chloride Pentafluoride

The syntheses described provide straightforward, relatively high-yield routes to reasonably pure TeClFs. The chemistry of the analogous SCIF5 has been studied extensively, and the chemistry of TeClFj is likely to be fniitful. 

The advantages of the TeFyClF reaction are that one-fifth as much chlorine monofluoride is necessary as when TeC is used and there is less chlorine to separate from TeClFj. The advantage of the TeCVClF reaction is that TeC is readily available commercially, whereas Tep4 is not. The purity of TeClF, in both cases depends largely upon the purity of CIF and the method of purifying the TeClFs- 

Tellurium tetrafluoride is moisture-sensitive and should be handled in a moisture-free environment, as has been fully described. The tellurium tetrachloride [Alfa Inorganics] may be used without further purification. Chlorine monofluoride [Ozark-Mahoning] is best manipulated in a preconditioned metal vacuum line. The reaction vessel is pretreated with Fj or SF4, followed by treatment overnight with CIF. The reaction vessel is constructed by either sealing one end of a length 

Tellurium tetrafluoride (0.72 g, 3.5 mmol) is placed in the 25-mL Teflon vessel inside the dry box. The vessel and contents are evacuated for 1 hr. Chlorine monofluoride (0.42 g, 7.9 mmol) is condensed in small aliquots (aliquots of 0.23 g of CIF have been used this mount corresponds to approximately 100 mL of CIF at a pressure of 760 torr) onto the tellurium tetrafluoride at — 196°. The reactants are warmed to room temperature and left for at least 20 min. This procedure is repeated until all of the CIF is consumed. The reactants are allowed to stand overnight at 25°. The solid TeF4 is gradually consumed, and a yellow liquid is formed. The product is separated by holding the Teflon vessel at — 78° and allowing any volatile materials to distill into another vessel held at —196° for a period of about 1 min. The more volatile fraction consists of unreacted CIF and traces of SiF4, TeClFj, and fluorocarbon impurities. Upon warming the Teflon vessel that contains the less volatile fraction to room temperature, clear liquid, TeClFj, is observed. 

based on the weight of TeF4 0.91 g. Found, 0.71 g (78% yield). 

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Tellurium chloride pentafluoride added under illumination to cyanogen chloride or to trifluoromethyl cyanide, formed an imino tellurium pentafluorides1 2 as colorless liquids. 

Dichloromethyleneamino Tellurium Pentafluoride2 Equimolar quantities of tellurium chloride pentafluoride and cyanogen chloride are loaded into a 61 Pyrex flask to give a pressure of approximately 1 atm at 20°. This mixture is irradiated for 5 h with an internal low-pressure mercury lamp. The volatile products are distilled under vacuum through a series of traps at — 70°, — 110°, and —196°. The trap at — 70° contained the crude product. A series of photolysis reactions starting with 150.7 g of tellurium chloride pentafluoride yielded 82.3 g crude product that is distilled on a 100-cm spinning-band column at 76 torr yield 59.7 g (32%) b.p. 63-65776 torr. 

Chloro(trifluoromethyl)methyleneamino tellurium pentafluoride was similarly prepared2 from tellurium chloride pentafluoride and trifluoromethyl cyanide. The product could be purified only by preparative gas chromatography on a 15% Halocarbon K-352 column. The vapor pressure of the pure compound was 50 torr at 25°. 

ClFsS, Sulfur chloride pentafluoride, 24 8 CIFsTe, Tellurium chloride pentafluoride, 24 31... 

Triphenyltrifluoro tellurium and excess phosphorus pentafluoride in dichloromethane form triphenyldifluorotellurium(VI) hexafluorophosphate, which, upon treatment with sodium fluoride, reverts to triphenyltrifluoro tellurium, and upon treatment with benzyltrimethylammonium chloride yields triphenylchlorodifluoro tellurium4> 5. 

ESTANO (Spanish) (7440-31-5) Finely divided material is combustible and forms explosive mixture with air. Contact with moisture in air forms tin dioxide. Violent reaction with strong acids, strong oxidizers, ammonium perchlorate, ammonium nitrate, bis-o-azido benzoyl peroxide, bromates, bromine, bromine pentafluoride, bromine trifluoride, bromine azide, cadmium, carbon tetrachloride, chlorine, chlorine monofluoride, chlorine nitrate, chlorine pentafluoride, chlorites, copper(II) nitrate, fluorine, hydriodic acid, dimethylarsinic acid, ni-trosyl fluoride, oxygen difluoride, perchlorates, perchloroethylene, potassium dioxide, phosphorus pentoxide, sulfur, sulfur dichloride. Reacts with alkalis, forming flammable hydrogen gas. Incompatible with arsenic compounds, azochloramide, benzene diazonium-4-sulfonate, benzyl chloride, chloric acid, cobalt chloride, copper oxide, 3,3 -dichloro-4,4 -diamin-odiphenylmethane, hexafluorobenzene, hydrazinium nitrate, glicidol, iodine heptafluoride, iodine monochloride, iodine pentafluoride, lead monoxide, mercuric oxide, nitryl fluoride, peroxyformic acid, phosphorus, phosphorus trichloride, tellurium, turpentine, sodium acetylide, sodium peroxide, titanium dioxide. Contact with acetaldehyde may cause polymerization. May form explosive compounds with hexachloroethane, pentachloroethane, picric acid, potassium iodate, potassium peroxide, 2,4,6-trinitrobenzene-1,3,5-triol. 

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