Sodium hydrogen fluoride

SODIUM FLUOROSILICATE SODIUM HYDRIDE SODIUM HYDROGEN FLUORIDE SODIUM HYDROGEN SULFATE SODIUM HYDROSULFIDE... 

Sodium hydrogen fluoride can be used instead of sodium hydrogen carbonate ... 

Sodium hydrogen fluoride, NaF,HF.—A crystalline primary fluoride is obtained by the action of hydrofluoric acid on sodium fluoride. On heating, it decomposes with elimination of hydrofluoric acid. Its solubility in water increases with rise of temperature. The heat of solution is given by Guntz3 as -6-2 Cal., and the heat of formation from solid sodium fluoride and gaseous hydrofluoric acid as 17-1 Cal. 

Potassium hydrogen fluoride or sodium hydrogen fluoride may serve as a fluoride ion source for the nucleophilic ring-opening reaction of epoxides. Attack of fluoride occurs predominantly at the less-hindered, i.e. least-substituted, site in the epoxide, as discussed in the following examples. 

Initial reports of the use of potassium or sodium hydrogen fluoride for the fluorinating ring opening of epoxides were by Knunyants and co-workers. It was found that oxiranc was cleaved to 2-fluorocthanol in 35 40% yield when healed in an autoclave with potassium hydrogen fluoride without a solvent. 

Epoxycyclohexane is cleaved to 2-fliiorocyclohexanol (4) with sodium hydrogen fluoride, without a solvent, in 21 % yield. ... 

In combination with aluminum Irifluoride, an increase in reactivity of potassium and sodium hydrogen fluoride towards epoxides is observed. " The reaction can be further accelerated by ultrasonic irradiation. From the product distribution it can be assumed that the mechanism of the ring opening under these conditions is dilTercnt from the reaction with potassium hydrogen fluoride alone. Probably a reaction between the hydrogen difluoride salt and aluminum trifluoride takes place with liberation of hydrogen fluoride in situ. This method is, therefore, more related to those discussed in Section 1.1.4.3.2.1.1. 

Potassium Hydrogen Fluoride or Sodium Hydrogen Fluoride Complexes... 

SODIUxM HYDROGEN FLUORIDE SODIUM HYDROGEN FLUORIDE, solution pOT)... 

Interchange of halogen is a means of synthesis of certain acyl halides which cannot be conveniently prepared by other methods. Acetyl fluoride is made from acetyl chloride and sodium hydrogen fluoride in acetic anhydride solution." By passing a stream of hydrogen bromide through oxalyl chloride an 85% yield of oxalyl bromide, (COBr), is obtained. The bromide cannot be made by the action of phosphorus pentabromide on oxalic acid. The method has also been applied to the preparation of acetyl bromide and iodide and other acyl iodides. ... 

NH4I03 ammonium iodate 13446-09-8 25,00 3.3000 1 2871 NaHF2 sodium hydrogen fluoride 1333-83-1 25.00 2.0800 1... 

Synonyms Hydrofluoric acid, sodium salt (2 1) Sodium acid fluoride Sodium fluoride Sodium hydrogen difluoride Sodium hydrogen fluoride Sodium hydrogen fluoride, sol n. 

An alternative fluoride breakdown process for beryl was used during the 1939-45 war by the Sappi Company in Italy. This was based upon the reaction with sodium hydrogen fluoride (NaF.HF) at a temperature of about 680°C. The fluoride reagent is mixed with the ground ore and made into briquettes with a little water, ready for firing in the breakdown furnace. The reaction converts the beryllium to a complex fluoride, believed to be 3NaF.2Bep2, without fluorination of the aluminium and silicon components. 

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