Tellurium Monofluorides

Pentaalkoxy tellurium monofluorides were formed by fluorination of tctramethoxy tellurium1, by reaction of m-tetramethoxy tellurium difluoride with sodium methoxide in methanol1, by the action of anhydrous hydrogen fluoride on hexamethoxy tellurium2, and by the condensation of primary alcohols with tellurium hexafluoride1. None of these compounds was isolated. Their presence in the reaction mixture was detected by 19F-NMR spectroscopy. 

In the reaction of bis(trifluoromethyl) telluride with chlorine monofluoridc, the primary chlorofluoride is converted to bis(trifluoromethyl)tellurium(IV) fluoride by interaction with excess chlorine monofluoride.103... 

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. 

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. 

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