Silicon trifluoride

Using a 10-p sample and a thermal conductivity detector, phenyl silicon trifluoride can be accurately determined in phenyl silicon dichloride down to 0.01%. The same procedure is applicable to the separation of high boiling chlorosilanes, which are difficult to separate otherwise, and also achieved the separation of various cyanopropylmethyl-chlorosilanes. 

If the original siloxane contains trifunctional methyl species, it is necessary to analyse for silanic hydrogen to determine how much of the methyl silicon trifluoride is due to MeHSiO and how much to MeSiO... 

Using a 10 y 1 sample and a thermal conductivity detector, phenyl silicon trifluoride can be accurately determined in phenyl methyl silicon dichloride down to 0.01%. 

Silicon Alkali carbonates, calcium, chlorine, cobalt(II) fluoride, manganese trifluoride, oxidants, silver fluoride, sodium-potassium alloy... 

Explosive Properties. It undergoes an expl reaction with H2, but concn and temp limits of the expin were not reproducible in Pyrex or stainless steel reactors, probably due to the presence or absence of Initiating radicals on the walls. The results became more reproducible after the walls were coated with silicone oil. Addn of tetrafluorohydrazine to H2/difluoramine or H2/N trifluoride mixts caused immediate explns (Ref 9). It also can expld on contact with reducing agents or from high press produced by shock wave or blast (Ref 11)... 

Chlorine Trifluoride Tech. Bull. , Morristown, Baker Adamson, 1970 Incandescence is caused by contact with bromine, iodine, arsenic, antimony (even at -10°C) powdered molybdenum, niobium, tantalum, titanium, vanadium boron, carbon, phosphorus or sulfur [1], Carbon tetraiodide, chloromethane, benzene or ether ignite or explode on contact, as do organic materials generally. Silicon also ignites [2],... 

Chromyl chloride at high concentration ignites in fluorine, while phosphorus penta-chloride, phosphorus trichloride and phosphorus trifluoride ignite on contact [1]. Boron trichloride ignites in cold fluorine, and silicon tetrachloride on warming [2],... 

Chlorine Non-metals Cobalt trifluoride Silicon Fluorine Non-metals Iodine pentafluoride Metals, etc. 

Nonmetal hydrides Boron trifluoride, phosphorus trichloride, silicon tetrachloride... 

Hydrogen hexafluorophophosphate, Borosilicate glass, 4360 Hydrogen peroxide, Diethyl ether, 4477 Imidazoline-2,4-dithione, 1141 Lithium nitride, Silicon tetrafluoride, 4688 Magnesium, Metal oxides, 4690 Manganese trifluoride, 4335 f Methylacrylate, 1531 Nitric acid, Glassware, 4436 Oxalic acid, Urea, 0725... 

Liquid perchloryl fluoride is a typical nonpolar solvent. Most inorganic and organic salts are insoluble in it. Conversely, most covalent, essentially nonpolar substances, boiling within about 50°G of perchloryl fluoride, are completely miscible, e.g., chlorine, boron trifluoride, sulfur hexafluoride, silicon tetrafluoride, phosgene, nitrous oxide, chlorine trifluoride, chlorofluorocarbons, silicon tetrachloride, sulfuryl chloride, dinitrogen tetroxide, and thionyl chloride 106). 

Boron trifluoride etherate was used in conjunction with the reducing agent borane to rearrange aromatic O-triisopropylsilyl ketoximes to cyclic and acyclic aniline derivatives. The steric hindrance of the substituents on the silicon atom, the size of the aliphatic ring and the presence of alkoxy substituents on the aryl group played important roles in the aniline formation. 

See Bromine trifluoride Silicone grease SILICONE LIQUID... 

Fluorine also reacts with other halogens, forming interhalogen compounds. While with bromine and iodine it reacts vigorously at ordinary temperatures, with chlorine the reaction occurs at 200°C. Such interhalogen products with these halogens include iodine heptafluoride, bromine trifluoride, bromine pentafluoride, and chlorine trifluoride. Metalloid elements, such as arsenic, silicon, selenium, and boron also inflame in a stream of fluorine, forming fluorides. 

The ore thortveitite is crushed and powdered. It is mixed with a large excess of ammonium hydrogen fluoride and heated at about 400°C for several hours in a platinum container under a stream of dry air. Silica is converted to volatile silicon tetrafluoride and swept out with dry air. Scandium oxide is converted to scandium trifluoride, SCF3 ... 

The largest consumption of electronic chemicals is for Silicon Wafers (approx. 20 billion), followed by specialty gases ( 3 billion). The DuPont Zyron portfolio of high purity etchants for silicon-based dielectric hlms comprises di- and trifluoromethane, octafluorocyclobutane, and nitrogen trifluoride. The latter are also used as chamber-cleaning gases. 

Moissan reasoned that if he were trying to liberate chlorine he would not choose a stable solid like sodium chloride, but a volatile compound like hydrochloric acid or phosphorus pentachloride. His preliminary experiments with silicon fluoride convinced him that this was a very stable compound, and that, if he should ever succeed in isolating fluorine, it would unite with silicon with incandescence, and that therefore he might use silicon in testing for the new halogen. After many unsuccessful attempts to electrolyze phosphorus trifluoride and arsenic trifluoride, and after four interruptions caused by serious poisoning, he finally obtained powdered arsenic at the cathode and some gas bubbles at the anode. However, before these fluorine bubbles could reach the surface, they were absorbed by the arsenic trifluoride to form pentafluoride (18, 23). 

Cao, X. P. and Hamers, R. J. Formation of a surface-mediated donor-acceptor complex Coadsorption of trimethylamine and boron trifluoride on the silicon (001) surface. Journal of Physical Chemistry 106, 1840-1842 (2002). 

Difluoro-l-silacyclobutane is obtained by the exchange of two chlorine atoms for fluorine in the 1,1-diehloro analog using antimony(III) fluoride in w-xylene yield 46% bp 36 -38 C.64 Antimony(lll) fluoride is supposed to interact, through its lone electron pair, with coordinative-ly unsaturated silicon rather than with chlorine atoms at silicon. Because of this Si —Cl compounds are fluorinated slower than C — Cl derivatives in the presence of boron trifluoride.65... 

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