Sulfur tetrachloride tetrafluoride

Sulfur, unlike oxygen, has the capacity to expand its valence shell beyond the normal octet of electrons to form hypervalent compounds such as sulfur tetrafluoride (SF4) with 10 electrons in the outermost shell and sulfur hexafluoride (SF6) containing 12 electrons in the valence shell.63,7 The chemistry of hypervalent sulfur started in 1873 with the discovery of the unstable compound sulfur tetrachloride (SCI4). The existence of hypervalent sulfur compounds is an important feature of the chemistry of sulfur and the precise nature of the bonding in these molecules has remained a puzzling problem. 

Depending on the ring substituent, trifluoromethoxyben2enes can be made by the sequential chlorination—fluorination of anisole(s) (351—354). A one-step process with commercial potential is the BF (or SbF2)-cataly2ed reaction of phenol with carbon tetrachloride/hydrogen fluoride (355). Aryl trifluoromethyl ethers, which may not be accessible by the above routes,may be made by fluorination of aryl fluoroformates or aryl chlorothioformates with sulfur tetrafluoride (348) or molybdenum hexafluoride (356). 

D.5 Write the formula of (a) titanium dioxide (b) silicon tetrachloride (c) carbon disulfide (d) sulfur tetrafluoride ... 

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). 

Carbon Disulfide under Sulfur Compounds Carbon Monoxide under Carbon Compounds Carbon Tetrachloride under Saturated Alkyl Halides Carbon Tetrafluoride under Saturated Alkyl Halides Carboxylic Acids Carboxylic Acids and Derivatives Carboxylic Acids with Other Functional Groups Cesium... 

A white solid, possibly polonium tetrafluoride, is obtained by treating polonium hydroxide or tetrachloride with dilute aqueous hydrofluoric acid treatment of this solid, in suspension in dilute hydrofluoric acid, with sulfur dioxide yields a bluish grey product (possibly PoF2) which rapidly reverts to the original white solid on standing, presumably owing to radio-lytic oxidation 12). The solubility of polonium(IV) in aqueous hydrofluoric acid increases rapidly with acid concentration, indicating complex ion formation (/ft), p. 48). 

The exchange of halogen for fluorine with sulfur tetrafluoride, due to the high temperatures generally required, is of limited use. Carbon tetrachloride and carbon tetrabromide react with sulfur tetrafluoride at 225-325 C to give mixtures of halofluoromethanes, while hexachloro-ethane under similar conditions gives l,1.2,2-tetrachloro-l,2-difluoroethane (59%) as the main product.191... 

Silicon dibromide sulfide, 0280 Silicon tetrafluoride, 4346 Sulfinyl bromide, 0273 Sulfinyl chloride, 4090 Sulfinyl fluoride, 4312 Sulfonyl chloride, 4093 Sulfur dibromide, 0279 Sulfur dichloride, 4107 Sulfur hexafluoride, 4368 Sulfur tetrafluoride, 4344 Tellurium tetrachloride, 4169... 

Nonmetal Halides. Vigorous or explosive reactions occur with phosphorus tribromide on addition of drops of water,20 phosphorus trichloride, phosphorus pentachloride,21 diselenium dichloride,22 sulfur dichloride, boron tribromide, sulfur dibromide,17 seleninyl bromide,23 phosphoryl chloride, sulfinyl fluoride, silicon tetrachloride, and silicon tetrafluoride.24... 

Phosphorus pentafluoride Polarine oil Selenium mustard Silicon tetrafluoride Strontium chlorate Strontium permanganate Sulfur chloropentafluoride Sulfur dichloride Sulfur hexafluoride Sulfur monochloride Titanium tetrachloride Thiocarhonyl dichloride Thionyl fluoride Thioptiosgene Triethyl aluminum Trifluoromethyl iodide Triisohutylaluminum Trimethylaluminum Vanadium tetrachloride Vincennite Vinyl bromide Vinylmagnesium bromide Xenon difluoride Zinc arsenide... 

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