Sulfur pentafluoride

Sulfur Pentafluoride. Sulfur pentafluoride [10546-01-7] is thought to be formed during the electrical breakdown of SF and also to be present in plasma reactions involving SF. A number of theoretical studies have been reported (110—113). 

Cas/liquid reaction 9 [CL 9] Fluorination of di(m-nitrophenyl) disulfide to the sulfur pentafluoride derivative [15,16]... 

Sulfur pentafluoride derivatives are of considerable industrial interest [15], The solubility of the di(p-nitrophenyl) disulfide in acetonitrile is too low to undergo a similar pathway as given in [GL 9], Therefore, the better soluble trifluorothio-m-nitrobenzene was used, leading to the further fluorination of this substrate to the pentafluoro derivative as given here. 

Toxicology. Sulfur pentafluoride is a severe pulmonary irritant in animals severe exposure is expected to cause the same effect in humans. 

The ACGIH 2003 short-term excursion limit (STEL)/ceiling limit for sulfur pentafluoride is 0.01 ppm (O.lOmg/m ). 

In the reaction with bis(trifluoromethyl) trioxide (10), addition of both CF30 and CF300 groups to the sulfur tetrafluoride molecule occurs to give a mixture of . v-(trifluoromethoxy)(tri-fluoromethylperoxy)sulfur tetrafluoride, s-bis(trifluoromethoxy)sulfur tetrafluoride (11) and (trifluoromethoxy)sulfur pentafluoride.215... 

F.M. Carlini, S. Miteni, Aryl-sulfur pentafluorides a new building-block generation for life sciences applications, Chim. Oggi 21 (3/4) (2003) 14-16. 

As in Explanation 89, these two compounds do not react in the sense of the Diels-Alder reaction. Instead, a cyclobutane derivative is formed by cycloaddition. The reaction is a free-radical process starting with single electrons on carbons 1 and 2 of perfluorovinylsulfur pentafluoride. Carbon 1 of the 1,3-butadiene joins the difluoromethylene group of the perfluorovinylsulfur pentafluoride because in this way, the newly formed biradical can better accommodate the single electron on the carbon next to the SF5 group. The biradical closes the ring in such a way that two stereoisomers, P and Q, cis- and trans-2,3,3-trifluoro-l-vinyl-2-cyclobutyl-sulfur pentafluoride, are formed in equal amounts [122]. 

Pentafluorosulfanyl acetylene is a useful starting reagent for the synthesis of a variety of SF5 derivatives of saturated ethers, vinyl ethers, pyrazoles, cyclic alkenes, and alkyl-substituted phenyl-sulfur pentafluorides (134). It is also used for the preparation of a number of F5S-containing alkenes and alkynes (138, 139). 

A growing body of evidence indicates that human activities are causing the earth to warm up. This so-called greenhouse effect is due principally to the release of gases such as methane and carbon dioxide into the atmosphere that act to hamper the radiation of heat into space. Now scientists have found a gas in the atmosphere that is the new champion of greenhouse gases. This gas is trifluo-romethyl sulfur pentafluoride (SF5CF3), which has the structure... 

SULFUROUS ACID, MONOSODIUM SALT see SFEOOO SULFUROUS ACID, SODIUM SALT (1 2) see SJZOOO SULFUROUS ANHYDRIDE see SOH500 SULFUROUS DICHLORIDE see TFLOOO SULFUROUS OXIDE see SOH500 SULFUROUS OXYCHLORIDE see TFLOOO SULFUROUS OXYFLUORIDE see TFL250 SULFUR OXIDE see SOH500 SULFUR PENTAFLUORIDE see SOQ450 SULFUR PHOSPHIDE see PHSOOO SULFUR SELENIDE see SBTOOO SULFUR SUBCHLORIDE see SON510... 

Sulfur chloride pentafluoride can be reduced photochemi-cally to the very toxic S2F10 and can be o.xidized photo-chemically to a mixture of SFsOSFs and SFsOOSFg. With olefins, it reacts to form a variety of organic sulfur pentafluorides. The ultraviolet irradiation of a mixture of sulfur chloride pentafluoride and dinitrogen tetrafluoride yields SFgNFj. ... 

---