Fluoroxysulfate Cesium Fluorine Sulfate

The white cesium fluoroxy sulfate precipitates from the reaction medium and may be kept for several months in the cold (0 to -15 °C) Metal surfaces can cause detonation of the reagent. The reaction scope of cesium fluoroxysulfate seems narrower than that of acetyl hypofluorite because of its limited solubility in organic solvents Cesium fluoroxysulfate has not been prepared with a fluorine-18 label. 

The fluorination of a saturated aqueous solution of rubidium sulfate or cesium sulfate with dilute elemental fluorine at temperatures between -4 and O C results in the formation of the corresponding fluoroxysulfate Cesium and rubidium fluoroxysulfate can be stored... 

Cesium fluoroxysulfate, CsSO.,f (1). Mol. wt. 247.97, stable solid at - I O, stable in CHyCN for about a day. The reagent is prepared by reaction of cesium sulfate in water with fluorine.1... 

Cesium fluoroxysulfate [5, 61 is prepared by reacting fluorine with cesium sulfate in aqueous solution [20, 21] (equation 3). 

Xenon difluoride is a better fluorinaling reagent for vinyltin compounds than cesium fluoroxysulfate (compare entry 1 in Tables 1 and 2). Besides this, cesium fluoroxysulfate (which can be prepared from elemental fluorine and cesium sulfate) is known to be shock sensitive and to undergo detonation upon hcaling. However, cesium fluoroxysulfate is the alternative choiee in the ease of some vinyltin compounds, such as 2- and 3-(trimethylstannyl)indolcs (Table 2, entries 5 7), whose reactions with xenon difluoride are not effective. 

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