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inquiryConditions | Yield |
---|---|
With pyrographite In neat (no solvent) redn., 750°C, diameter of C-particels about 0.4mm, 30min;; | 93% |
In neat (no solvent) byproducts: SO2; heating of Na2SO4 in under exclusion of air; evolution of SO2;; | |
With pyrographite In neat (no solvent) redn., coating of react.-vessel: forsterite;; | |
With pyrographite In melt melting with sand and coal;; |
Conditions | Yield |
---|---|
In water a mixt. of 7% SO2 and 93% N2 is introduced into concd. Na2S soln. at 60°C;; | A n/a B n/a C 46% D n/a |
sulphurous acid
sodium hydroxide
A
hydrogen sulfide
B
water
D
sodium sulfite
Conditions | Yield |
---|---|
In water 7 % SO2; | A n/a B n/a C 37.5% D n/a |
Conditions | Yield |
---|---|
standing for 2.5 months; | A n/a B 0.015% |
With oxygen In neat (no solvent) oxidation at 150°C;; | |
standing for 2.5 months; | A n/a B 0.015% |
Conditions | Yield |
---|---|
In not given introduction of SO2 into dolomite; reaction of the formed sulfite with Na2SO4;; |
Conditions | Yield |
---|---|
In tetrachloromethane with dild. NaOH soln.; | |
In tetrachloromethane with dild. NaOH soln.; |
Conditions | Yield |
---|---|
In neat (no solvent) byproducts: O2, S; |
Conditions | Yield |
---|---|
In neat (no solvent) reaction of O3 with Na2S leads to formation of an addn. product as intermediate, which rearranges immediately into Na2SO3;; | |
In water byproducts: Na2S2O3, Na2S2O4; reaction of aq. Na2S with ozone; formation of Na2SO3 and a small amount of Na2S2O3 and Na2S2O4;; |
Conditions | Yield |
---|---|
With potassium chromate; magnesium chloride In water byproducts: KCl; | |
With potassium chromate; water; ammonium chloride In water byproducts: KCl, NH4OH; | |
With K2CrO4; NH4Cl; H2O In water byproducts: KCl, NH4OH; | |
With K2CrO4; MgCl2 In water byproducts: KCl; |
Conditions | Yield |
---|---|
With ozone In not given neutral soln.; | |
With O3 In not given neutral soln.; |
Conditions | Yield |
---|---|
In neat (no solvent) decomposition without influence of air at 350°C, amount of formed by-products Na2SO4 and Na2S5 increases with increasing temperature;; | |
In neat (no solvent) decomposition without influence of air at 350°C, amount of formed by-products Na2SO4 and Na2S5 increases with increasing temperature;; |
Conditions | Yield |
---|---|
In water decomposition in aq. soln.;; | |
With carbon dioxide In water | |
With silica gel In water decomposition in aq. soln. under influence of light or dust;; |
Conditions | Yield |
---|---|
With potassium dichromate In water Na2S2O3 in excess, soln. heated; | A n/a B >99 C n/a |
With K2Cr2O7 In water Na2S2O3 in excess, soln. heated; | A n/a B >99 C n/a |
sodium sulfite
Conditions | Yield |
---|---|
In neat (no solvent) byproducts: S; heating to 310-385°C;; | |
With copper In water dissulfuration by Cu while heating to 170°C;; | |
With copper In neat (no solvent) dissulfuration by Cu while heating to 115°C;; |
Conditions | Yield |
---|---|
In neat (no solvent) Kinetics; investigation of the disproportionation of Na2S2O3 (scattered on an Al-foil) at 495-548K; not isolated; investigation of kinetics by X-ray photoelectron spectroscopy; |
Conditions | Yield |
---|---|
With sodium amalgam In not given dissociation of Na2S2O3 with sodium amalgam;; | |
With sodium In ammonia Kinetics; -34 - -65°C; followed by iodometry; |
bromocyane
B
sodium thiocyanide
C
sodium sulfate
D
sodium bromide
E
sodium sulfite
Conditions | Yield |
---|---|
With water In not given byproducts: HCN; |
bromocyane
B
sodium thiocyanide
C
sodium sulfate
D
sodium sulfite
Conditions | Yield |
---|---|
With water In water byproducts: HCN, NaBr; neutral soln., 0.1n Na2S2O3 soln. in excess; | |
With H2O In water byproducts: HCN, NaBr; neutral soln., 0.1n Na2S2O3 soln. in excess; |
Conditions | Yield |
---|---|
In water reaction with Mg band at boiling heat;; | |
In water |
Conditions | Yield |
---|---|
With Na-amalgame In not given cleaving by Na-amalgame;; |
copper
A
copper(I) sulfide
B
sodium sulfite
Conditions | Yield |
---|---|
In water at boiling; |
Conditions | Yield |
---|---|
In not given in concd. NaOH soln., by warming, in 1 h 31% of S of Na2S2O3 pptd. as ZnS, resp.; | |
In not given in concd. NaOH soln., by warming, in 3 h 38% of S of Na2S2O3 pptd. as ZnS, resp.; | |
In not given in concd. NaOH soln., by warming, in 7 h 43% of S of Na2S2O3 pptd. as ZnS, resp.; |
Conditions | Yield |
---|---|
In water Kinetics; at 25, 69.84 and 90.00 °C;; | |
In water in the presence of rhodanase from liver or kidney;; | |
In water Kinetics; at 25, 69.84 and 90.00 °C;; | |
In water in the presence of rhodanase from liver or kidney;; |
Conditions | Yield |
---|---|
In not given 140-200°C; |
sodium hydroxide
sodium nitrite
A
nitrogen
B
water
C
sodium sulfite
Conditions | Yield |
---|---|
In sodium hydroxide |
Conditions | Yield |
---|---|
With water In sodium hydroxide at high temp.; |
C
sodium sulfite
Conditions | Yield |
---|---|
With water In water byproducts: NaOH; in alk. soln., at room temp.; | |
With H2O In water byproducts: NaOH; in alk. soln., at room temp.; |
C
sodium sulfite
Conditions | Yield |
---|---|
In water in alk. soln.; | |
In water in alk. soln.; |
Conditions | Yield |
---|---|
In neat (no solvent) reaction of KNO3 and NaOH with an excess of Na2SO3 (free of water) at temp. between 320 and 420°C;; | 98% |
Conditions | Yield |
---|---|
cobalt(II) oxide In water Kinetics; thermostating an acetate buffer soln. in distd. water in a flask open to air or under O2/Ar, addn. of CoO, addn. of thermostated Na2SO3 soln. at 20 - 80°C, stirring this mixture, react. at 30, 35 and 40°C, pH = 4.63; filtration of CoO, pptn. the sulphate ions as BaSO4 for gravimetric estimation or determination by iodometric titration, rate depending on buffer soln., CoO, SO3(2-) and O2 concentration, influence of pH and buffer studied; | 98% |
With sodium acetate; acetic acid; magnesium oxide In water Kinetics; simultaneous addn. of Na2SO3 and catalyst to acetate buffer, stirring at30°C, pH 5.5 and 1600 rpm under N2/O2 atmosphere, iodometric ana l. of unreacted S(IV); | |
copper(I) oxide In water Kinetics; simultaneous addn. of Na2SO3 and catalyst, stirring at 30°C and 1600 rpm under N2/O2 atmosphere with and without ethanol, iodometric anal. of unreacted S(IV); |
Conditions | Yield |
---|---|
With MES buffer In further solvent(s) Na2SO3 soln. (1.3 equiv.) added dropwise to soln. of hydroxycobalamin*HCl in MES buffer (pH 6); reacted at 0°C (ice bath) for 2 h; pptd. by dripping into chilled acetone (-20°C); filtered; washed with acetone and Et2O (-20°C); dried under vac. overnight; | 98% |
3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazine-6-carbaldehyde
sodium sulfite
6-bromo-7-chloro-4H-pyrido[3,2-b][1,4]oxazin-3-one
Conditions | Yield |
---|---|
Stage #1: 3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazine-6-carbaldehyde With chlorine In N,N-dimethyl-formamide at 0℃; for 2.75h; Stage #2: sodium sulfite In N,N-dimethyl-formamide at 0 - 15℃; for 0.5h; | 98% |
Conditions | Yield |
---|---|
In not given alkaline media; | 97% |
In not given alkaline media; | 97% |
In not given | 86% |
sodium sulfite
Conditions | Yield |
---|---|
With sodium iodide In water; acetone | 95% |
Conditions | Yield |
---|---|
In water from equimolar amounts of Na2SO3, NaHSO3 and H2S, best react. temp.: 20-40°C;; | 95% |
In not given byproducts: H2O; adding H2S to solns. of NaHSO3 and Na2SO3 with slightly moving the liquid;; contains traces of sulfite;; | |
In not given passing H2S in trickle-bed reactor at 70 to 75°C trough solns. of NaHSO3 and Na2SO3;; | |
In not given byproducts: H2O; adding H2S to solns. of NaHSO3 and Na2SO3 with slightly moving the liquid;; contains traces of sulfite;; |
Conditions | Yield |
---|---|
oxidation, in 2h , at 50°C;; | 95% |
oxidation, in 2h , at 50°C;; | 95% |
With borax; sodium tetraborate; isopropyl alcohol In water Kinetics; components soln. preparation (room temp., isopropyl alcohol as radical acceptor), keeping for 6 min at 60°C; soln. anal.; |
Conditions | Yield |
---|---|
With sodium amalgam In ethanol reduction with Na-amalgam in presence of an organic base, <40°C, inert atmosphere;; dry product on treatment with dry CO2;; | 95% |
With sodium amalgam In ethanol reduction with Na-amalgam (0.1-0.2% Na), 0-10°C;; | |
With sodium amalgam In ethanol reduction;; |
Conditions | Yield |
---|---|
In water heated at 85°C for 1.5 h; cooling to 25°C, pptn. with ethanol, filtration, washing with ethanol then ether, air-drying; | 95% |
1,4-dioxane
1-(4'-methoxy-biphenyl-4-yl)-ethanone
sodium sulfite
4'-methoxy-biphenyl-4-carboxylic acid
Conditions | Yield |
---|---|
With hydrogenchloride; bromine In water | 93% |
sodium sulfite
Conditions | Yield |
---|---|
With pyrographite redn. with charcoal at 640 - 800°C for 1 h (max.); | 92% |
With coal redn. with charcoal at 640 - 800°C for 1 h (max.); | 92% |
With carbon monoxide at 700 - 900°C; | >99 |
With CO at 700 - 900°C; | >99 |
Conditions | Yield |
---|---|
In not given | 90% |
In not given | 90% |
Conditions | Yield |
---|---|
In ethanol for 1h; Reflux; Inert atmosphere; | 88% |
Conditions | Yield |
---|---|
With sulfuric acid In water aq. soln. of OsO4 mixed at 20°C with equimolar mixt. of Na2SO3 and H2SO4, heated at 50°C for 3 h, pptd.; filtered off, washed (ethanol, acetone), dried (50°C for 2 h, vac.), elem. anal.; | 87% |
sodium sulfite
Conditions | Yield |
---|---|
K2OsO2(OH)4 In water; tert-butyl alcohol | 86.5% |
Conditions | Yield |
---|---|
In water Cu(NO3)2*3H2O (0.946 mmol) added to 10 ml of 1.6 M Na2SO3 and 0.5 M NaHSO3; soln. of Fe(NH4)2(SO4)2*6H2O (0.915 mmol) added; kept (several d); collected; washed with H2O; dried in air; elem. anal.; | 86% |
methyl 2-[7-bromo-2-(methyloxy)-8-quinolinyl]-2-propenoate
sodium sulfite
methyl 2-[7-bromo-2-(methyloxy)-8-quinolinyl]-2-oxiranecarboxylate
Conditions | Yield |
---|---|
With 3-chloro-benzenecarboperoxoic acid In hexane; water; 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran; ethyl acetate | 84% |
Conditions | Yield |
---|---|
for 2h; Heating; | 84% |
Conditions | Yield |
---|---|
for 2h; Heating; | 82% |
sodium sulfite
Conditions | Yield |
---|---|
In water 25°C, equimolar mixt.; sepn. of ppt. after 12 h or evapn. to dryness (room temp.) and dissolving in water and filtered off; washing (EtOH, ether); elem. anal.; | 81% |
ethyl 2-hydroxypropionate
sodium sulfite
2-oxo-propionic acid ethyl ester
Conditions | Yield |
---|---|
With dihydrogen peroxide; bromine In dichloromethane; water | 80.2% |
Conditions | Yield |
---|---|
In not given byproducts: Na2SO4; in presence of O2, oxidizing agents or salts of heavy metals; | 80% |
In not given byproducts: Na2SO4; in presence of O2, oxidizing agents or salts of heavy metals; | 80% |
cis-{Co(en)2(N3)2}NO3
sodium sulfite
Conditions | Yield |
---|---|
In water at 40 °C, well stirred; solution: violet -> orange/brown; after 10 min. addition of ethanol; crystn. after 2 h; washed with ethanol and ether, dried in air; cis-Na{Co(en)2(SO3)2} was removed by filtration of the saturated soln. in warm water and recrystn. by addition of acetone; | A 80% B n/a |
tetrakis(acetonitrile)silver(I) hexafluorophosphate
diethyl dithiophosphate ammonium salt
sodium sulfite
Conditions | Yield |
---|---|
Stage #1: tetrakis(acetonitrile)silver(I) hexafluorophosphate; diethyl dithiophosphate ammonium salt at 20℃; for 0.5h; Schlenk technique; Inert atmosphere; Stage #2: sodium sulfite for 1h; Schlenk technique; Inert atmosphere; | 79.07% |
sodium sulfite
Conditions | Yield |
---|---|
In water 25°C, equimolar mixt.; sepn. of ppt. after 12 h or evapn. to dryness (room temp.) and dissolving in water and filtered off; washing (EtOH, ether); elem. anal.; | 79% |
sodium sulfite
Conditions | Yield |
---|---|
In water 25°C, equimolar mixt.; sepn. of ppt. after 12 h or evapn. to dryness (room temp.) and dissolving in water and filtered off; washing (EtOH, ether); elem. anal.; | 78% |
Conditions | Yield |
---|---|
In not given heating on water bath; | A n/a B 77.5% |
In not given heating on water bath; | A n/a B 77.5% |
4'-(2-chloro-ethyl)-biphenyl-4-sulfonyl chloride
sodium sulfite
Conditions | Yield |
---|---|
With N-benzyl-N,N,N-triethylammonium chloride In water at 37 - 60℃; for 6.26667 - 13.5h; Product distribution / selectivity; | 77.1% |
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