Sodium tungstate.dihydrate

Tetrahydrobenzyl alcohol (( )3-cyclohexenene-l-methanol) and 30% aqueous hydrogen peroxide were purchased from Fluka, AG. 3-Cyclohexene-1-carboxylic acid and cis-4-cyclohexene-l,2-dicarboxylic acid were used as purchased from Lancaster Chemical Co. Methyl iodide, acetic anhydride, Oxone (potassium peroxymonosulfate), Aliquot 336 (methyl tri-n-octylammonium chloride), sodium tungstate dihydrate and N,N-dimethylaminopyridine (DMAP) were purchased from Aldrich Chemical Co. and used as received. 3,4-Epoxycyclohexylmethyl 3, 4 -epoxycyclohexane carboxylate (ERL 4221) and 4-vinylcyclohexene dioxide were used as purchased from the Union Carbide Corp. (4-n-Octyloxyphenyl)phenyliodonium hexafluoroantimonate used as a photoinitiator was prepared by a procedure described previously (4). 

Sodium tungstate dihydrate Tungstic acid, disodium salt, dihydrate (10213-10-2), 65, 166... 

To a round-bottomed flask (50 ml) equipped with a long-necked adapter, reflux condenser, and a magnetic stirrer bar, add pyridine (1.6 g, 20 mmol), hydrogen peroxide (10.2 g, 90 mmol), and sodium tungstate dihydrate (0.10 g, 0.30 mmol). 

Sodium tungstate dihydrate Method [88] 0.26 g, 0.79 mmol may act as an irritant... 

A. r>itr>o80-tert-oetane To a 1-L, three-necked flask equipped with an addition funnel, a mechanical stirrer, and a thermometer are added 120 ml of methanol, 51.7 g of tert-octylamine (0.4 mol) and 90 mL of water containing 1.2 g (0. 0028 mol) of the tetrasodium salt of ethylenediaminetetraacetic acid and 2.52 g (0. 0076 mol) of sodium tungstate dihydrate. The solution is cooled to 15°C in an ice bath and hydrogen peroxide (361 mL of a 16% solution, 1.7 mol) (Notes 1 and 2) is added over 5 hr. The blue reaction mixture is stirred for an additional 16 hr and the product is extracted with petroleum ether (3 x 50 mL). Unreacted amine is removed by washing twice with 2 N hydrochloric acid. After the blue organic layer is washed with brine, it is dried over MgS04. Petroleum ether is removed by distillation at atmospheric pressure. Continued distillation of the product affords 29.7 g of nitroso-tert-octane... 

Sodium tungstate (0-2m). Dissolve 65-97 g sodium tungstate dihydrate, Na2W04.2H20, in water and dilute to 1 litre. 

Sodium tungstate dihydrate was purchased from Wako Pure Chemical Ind., Ltd. and used without further purification. The checkers employed material purchased from Mallinckrodt, Inc. 

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