Diethyl sulfate sulfite

Diethylhydrogallium, see Diethylgallium hydride, 1715 Diethylhydroxytin hydroperoxide, 1757 Diethyllead dinitrate, 1686 Diethylmagnesium, 1681 Diethylmethylphosphine, 2030 Diethyl 4-nitrophenyl phosphate, 3323 Diethyl 4-nitrophenyl thionophosphate, 3322 t 3,3-Diethylpentane, 3193 Diethyl peroxide, 1693 Diethyl peroxydicarbonate, 2440 Diethylphosphine, 1728 N- (D i ethylphosphinoy 1) h yd ro x y I a m i n e, 1746 Diethyl phosphite, 1727 Diethyl succinate, 3026 Diethyl sulfate, 1704 Diethyl sulfite, 1703 Diethyl telluride, 1711 Diethylthallium perchlorate, 1676 Diethyl trifluoroacetosuccinate, 3314 Diethylzinc, 1712... 

From Reference 14d, the gaseous a values are —18.19 for di-tt -alkyl sulfites and —18.10 for din-alkyl sulfates. The a values were calculated from the diethyl, dipropyl and dibutyl substituted species in each of the homologous series. 

Apart from the conversion of peroxides to useful products, it is sometimes necessary to reduce peroxides, and especially hydroperoxides formed by auto-oxidation. Such compounds are formed especially in hydrocarbons containing branched chains, double bonds or aromatic rings, and in ethers such as diethyl ether, diisopropyl ether, tetrahydrofuran, dioxane, etc. Since most peroxidic compounds decompose violently at higher temperatures and could cause explosion and fire it is necessary to remove them from liquids they contaminate. Water-immiscible liquids can be stripped of peroxides by shaking with an aqueous solution of sodium sulfite or ferrous sulfate. A simple and efficient way of removing peroxides is treatment of the contaminated compounds with 0.4 nm molecular sieves [669]. 

Sulfite paper has a relatively short life span, since residual acid will continue to hydrolyze the cellulose and cause embrittlement. Further sources of acid include aluminum sulfate (which is added together with resin to suppress bleeding or feathering of ink into the paper) and S02 and NO from the atmosphere. Much of the world s library collections and archives will soon be lost as the paper crumbles. Various deacidification treatments (e.g., with ammonia, morpholine, cyclohexylamine carbamate, or diethyl-zinc) have been proposed and tried, but at best they can only halt the process of embrittlement and cannot reverse it.14 With the move to kraft pulping, alkaline peroxide bleaching, and increasing use of precipitated calcium carbonate as a filler, the high quality papers produced today are intrinsically acid free and should also resist subsequent acidification by S02-polluted air fairly well. 

The tellurophene dibromide is suspended in 100 ml of diethyl ether and placed together with a solution of 21 g (170 mmol) of sodium sulfite and 16 g (161 mmol) of potassium carbonate in 250 ml of water in a 500 m/ separatory funnel. The mixture is shaken until all the solid has disappeared, the diethyl ether layer is separated, the aqueous layer is extracted twice with diethyl ether, and the combined organic phases are washed with water. The diethyl ether solution is dried with anhydrous sodium sulfate, filtered, and the solvent is evaporated at 20° under aspirator vacuum. The residue, a yellowish oil, is chromatographically pure tellurophene yield 3.3 g (59%) b.p. 102°/350 torr (partial decompostion). 

Oxotelluraxanthcnc2 180 mg of 9-oxotelluraxanthene Te, 7e-dichloride are suspended in 10 m/ of diethyl ether, and the suspension is shaken in a separatory funnel with a solution of 240 mg (1.9 mmol) of sodium sulfite and 180 mg (1.3 mmol) of potassium carbonate in 5 ml of water until the suspended solid has dissolved. The organic phase is separated, the aqueous phase is extracted twice with diethyl ether, the organic phases are combined, washed with water, dried with anhydrous magnesium sulfate, filtered, and the solvent evaporated under aspirator vacuum. The residue is recrystallized from bcnzene/dichloromethane yield 120 mg (82%) m.p. 116°. 

Cyclic sulfites or cyclic sulfates having a C=C bond either in the ring or on the side chain undergo smooth addition of electrophiles to furnish a good yield of the product. For example, enediol cyclic sulfite 75 undergoes addition of 0,0-diethyl dithiophosphate to furnish a high yield of addition product 76 (84CHEC851) [Eq. (22)]. 

Pour the reaction mixture into a 100 mL separating funnel and dilute with diethyi ether (30 mL). Wash the organic phase consecutively with saturated sodium sulfite solution (2 x 20 mL), water (2 x 20 mL), and brine (2 X 20 mL), and then dry over anhydrous magnesium sulfate. Filter and then concentrate by rotary evaporation to give a brown oil. Purify by column chromatography on silica gel (40 g, 5% diethyl ether/petroleum ether as eluent) to give 2 -iodopropiophenone as a yellow oil (0.39 g, 75%). 

A solid compound separates out initially, which is washed with 50% alcohol until free from sulfate it is then washed with diethyl ether and dried in a vacuum desiccator over P2O5. Chemical analyses of the mixed metal sulfite hydrazine hydrates confirms a stoichiometry of MFe2(S03)3 6N2H4 2H20. The reaction can be written as follows ... 

---