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inquirySelenium Basic information Product Name: Selenium Synonyms: VANDEX;YEAST BOUND SELENIUM;WIENINGERS REAGENT;WIENINGER'S REAGENT;SELENIUM SINGLE ELEMENT STANDARD;SELENIUM STANDARD;SELE
Molecular Formula: Se C.A.S No.: 7782-49-2 Property: black gray or purplish red metalloid, soluble inconcentrated sulfuric acid and trichloromethane, and insoluble in water and ethanol. Application: used as glass, ceramic and feed additi
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Selenium (Se) Advantage : Oxygen-free Selenium 1,Purity:5N(99.999%) ;6N(99.9999%); 2,Technic: Rectification - Second rectification; 3,Analysis :ICP-MS or GDMS (5N’s standard :All impurity elements is below 10ppm); 4,Particle Size :
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inquirySelenium Basic information Product Name: Selenium Synonyms: VANDEX;YEAST BOUND SELENIUM;WIENINGERS REAGENT;WIENINGER'S REAGENT;SELENIUM SINGLE ELEMENT STANDARD;SELENI
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inquiryConditions | Yield |
---|---|
With ascorbic acid In H2O byproducts: dehydroascorbic acid, H2O; selenium nanoparticles obtained by redn. of selenous acid with ascorbic acid; gravimetric anal.; | 96% |
In water Electrolysis; <30°C; steel cathode covered by amorphous Se; | |
pptn. of Se by reducing agents;; |
A
selenium
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide (Ar), treated dropwise with stirring, stirred for 16 h; filtered, concentrated, column chromatography on silica gel (pentane/CH2Cl2 (1:2)), recrystallized from hexane/chloroform at -25°C, elem. anal.; | A n/a B 92% |
titanocene pentaselenide
dimethyl acetylenedicarboxylate
A
selenium
B
[(C5H5)2TiSe2C2(CO2CH3)2]
Conditions | Yield |
---|---|
In xylene under N2, xylene soln. of Ti complex and dimethyl acetylenedicarboxylate refluxed for 0.5 h; cooled, filtered, Se washed with CH2Cl2, filtrate evapd. to oil, dissolved in small amt. of CH2Cl2, chromd., diluted with CH2Cl2, concd. in vac., cooled at -20°C, filtered; | A n/a B 90% |
In 1,2-dichloro-ethane Kinetics; under N2, soln. of Ti complex in 1,2-dichloroethane refluxed for 0.5 h,dimethyl acetylenedicarboxylate added to refluxing soln.; progress react. monitored by removing aliquots and recording visible spectrum, cooled soln. filtered, filtrate evapd. to dryness in high vac., residue dissolved in CH2Cl2, diluted with hexane, concd.; | A n/a B 77% |
Conditions | Yield |
---|---|
With sulfuric acid; potassium iodide In sulfuric acid byproducts: I2; sepn. of the formed I2 by distn.;; | 87.8% |
With sulfuric acid; potassium iodide In sulfuric acid byproducts: I2, H2O; storage at room temperature for 4 weeks;; | 38.4% |
With sodium hypophosphite In water heating for a longer period of time;; | >99 |
bis(4-methoxyphenyl)selenide
A
selenium
B
bis(4-methoxyphenyl)diselenide
C
methoxybenzene
Conditions | Yield |
---|---|
With hydrogen iodide In chloroform; water at 60℃; for 6h; | A 22% B 34 %Chromat. C 41.3 %Chromat. |
bis(4-methoxyphenyl)selenide
A
selenium
B
4-(4-hydroxyphenylselanyl)phenol
C
1,2-bis(4-hydroxyphenyl)diselane
D
phenol
Conditions | Yield |
---|---|
With pyridine hydrochloride at 200℃; for 0.833333h; | A 16% B n/a C n/a D n/a |
1,2,3,4,5-pentafluoro-6-iodobenzene
A
selenium
B
bis(pentafluorophenylseleno)mercury
Conditions | Yield |
---|---|
In further solvent(s) byproducts: (C6F5)2Se; Irradiation (UV/VIS); glyme; | A n/a B 15% |
In ammonia byproducts: (C6F5)2Se; Irradiation (UV/VIS); N2 atm.; -35°C, 2-72, evapn., extraction (CCl3F), evapn., sublimation, addn. of Hg, stirring (2 d); filtn., washing (CCl3F), extraction (CHCl3), recrystn. (CHCl3); | A n/a B 2.4% |
In neat (no solvent) byproducts: (C6F5)2Se; Irradiation (UV/VIS); | A n/a B 2% |
In ammonia byproducts: (C6F5)2Se; N2 atm.; -35°C, 20 min, evapn., extraction (CCl3F), evapn., sublimation, addn. of Hg, stirring (2 d); filtn., washing (CCl3F), extraction (CHCl3), recrystn. (CHCl3); | A n/a B 2.7% |
bromopentafluorobenzene
A
selenium
B
bis(pentafluorophenylseleno)mercury
Conditions | Yield |
---|---|
In ammonia byproducts: (C6F5)2Se; N2 atm.; -35°C, 20 min, evapn., extraction (CCl3F), evapn., sublimation, addn. of Hg, stirring (2 d); filtn., washing (CCl3F), extraction (CHCl3), recrystn. (CHCl3); | A n/a B 12.2% |
bromopentafluorobenzene
A
selenium
B
bis(pentafluorophenylseleno)mercury
Conditions | Yield |
---|---|
In tetrahydrofuran byproducts: (C6F5)2Se; Irradiation (UV/VIS); N2 atm.; -40 to 60°C, 3-4 h, evapn., stirring (12 h, 20°C), filtn., evapn., sublimation (vac.), addn. of Hg, stirring (2 d, 20°C); filtn., washing (CCl3F), extraction (CHCl3), recrystn. (CHCl3); | A n/a B 9.1% |
Conditions | Yield |
---|---|
In not given boiling for 50 h; | 1% |
1,2,3,4,5-pentafluoro-6-iodobenzene
A
selenium
B
bis(pentafluorophenylseleno)mercury
Conditions | Yield |
---|---|
In tetrahydrofuran byproducts: (C6F5)2Se; Irradiation (UV/VIS); N2 atm.; -40 to 60°C, 3-18 h, stirring (12 h, 20°C), filtn., evapn., sublimation, addn. of Hg, stirring (2 d); filtn., washing (CCl3F), extraction (CHCl3), recrystn. (CHCl3); | A n/a B 0.5% |
In tetrahydrofuran byproducts: (C6F5)2Se; N2 atm.; 20°C, 20 min, stirring (12 h, 20°C), filtn., evapn., sublimation, addn. of Hg, stirring (2 d, 20°C); filtn., washing (CCl3F), extraction (CHCl3), recrystn. (CHCl3); | A n/a B 0.6% |
potassium carbonate
diselenium dichloride
A
selenium
C
selenium oxychloride
Conditions | Yield |
---|---|
In melt byproducts: CO2; | |
In neat (no solvent) byproducts: CO2; Se2Cl2 and anhyd. K2CO3;; | |
In melt byproducts: CO2; | |
In neat (no solvent) byproducts: CO2; Se2Cl2 and anhyd. K2CO3;; |
Conditions | Yield |
---|---|
In sulfuric acid byproducts: H2O; Electrochem. Process; | |
In not given byproducts: H2O; Electrochem. Process; in diffusion layer of Hg cathode; | |
In sulfuric acid byproducts: H2O; aq. H2SO4; Electrochem. Process; |
Conditions | Yield |
---|---|
With sodium hydroxide In water byproducts: H2; Electrolysis; 30-75°C; pH=8; Pb cathode; effect of temp. and conc.; discussion of polarization curve against normal H-electrode; | |
With NaOH In water byproducts: H2; Electrolysis; 30-75°C; pH=8; Pb cathode; effect of temp. and conc.; discussion of polarization curve against normal H-electrode; |
Conditions | Yield |
---|---|
With sodium hydroxide; water In water Electrolysis; 30-75°C; Pt cathode; >8 g NaOH/l; | A 0% B n/a |
Conditions | Yield |
---|---|
With sodium hydroxide; water In water Electrolysis; 40-80°C; 6 h; steel cathode; 750-1250 A/m**2; |
Conditions | Yield |
---|---|
With sodium hydroxide; water In water Kinetics; Electrolysis; 40-80°C; steel cathode and anode; 250-1250 A/m**2; | |
With sodium hydroxide; water In water Electrolysis; 30-75°C; Pt cathode; 1.8-8 g NaOH/l; | |
With NaOH; H2O In water Kinetics; Electrolysis; 40-80°C; steel cathode and anode; 250-1250 A/m**2; |
Conditions | Yield |
---|---|
600°C; 3-5 h; | 100% |
580°C in evacuated quartz ampul; | |
In neat (no solvent) 3-zone furnace, heating (24 h, 800°C, vac., growth zone 1000°C), chemical vapor transport method using Br2 or ICl3, vac., gradient1050-1000°C; piezoreflectance measurement, XRD; |
Conditions | Yield |
---|---|
ratio of Se:B=2; 5 h at 850°C; | 100% |
ratio of Se:B=10; 10 h at 850°C; | 100% |
ratio of Se:B=2.5; 1 h at 850°C; | 100% |
Conditions | Yield |
---|---|
In neat (no solvent) under dry N2 atm. in vac. glovebox; mixt. of Bi and Se was transferred in quartz tube, with was flame sealed under vac.; tube was heated to 600°C for 48 h; stayed at 600°C for 2 ds; cooled to 50°C in 10 h; ground into powder; | 100% |
high pressure at 420°C; | |
on Al plate at 47-180°C; tempering under m.p. of Se; no reaction at 130°C without tempering; |
selenium
copper
Conditions | Yield |
---|---|
stoich. ratio of Se and Cu in bomb; | 100% |
In neat (no solvent) prepn. of film by vac. evaporation onto glass substrate (160 - 250°C); | |
In neat (no solvent) heating (sealed silica tube, to 800°C), annealing (400°C, 1 week), grinding, pelletizing, heat treatment (400°C, 30 days), slow cooling to room temp.; |
selenium
copper
Conditions | Yield |
---|---|
stoich. ratio of Se and Cu in bomb; | 100% |
In neat (no solvent) synthesized from elements; | |
In neat (no solvent) mixt. heating (evac. sealed bulb), according to: A. A. Babitsyna et al.,Zhur. Neorg. Khim. 20 (1975) 3097, 3357; Russ. J. Inorg. Chem. 20 (1975 ) No. 11 and 12; |
Conditions | Yield |
---|---|
In further solvent(s) byproducts: H2; Ar atm.; monoglyme, room temp., heating (50°C); evapn. (vac.), crystn.; | 100% |
Conditions | Yield |
---|---|
In neat (no solvent) Bi, Se and Te ground, pressed at 650 K, homogenizing calcination (570 K, 400h) in evacuated quartz ampoules; single phase (X-ray- and electron-microprobe analyses); | 100% |
Conditions | Yield |
---|---|
In neat (no solvent) Bi, Se and Te ground, pressed at 650 K, homogenizing calcination (730 K, 400h) in evacuated quartz ampoules; single phase (X-ray- and electron-microprobe analyses); | 100% |
selenium
arsenic pentafluoride
fluorosulfonylchloride
sulfur dioxide
iodine
Conditions | Yield |
---|---|
byproducts: AsF3; SO2 and AsF5 were condensed into Se and I2; after 16 h no insoluble material was observed; condensed SO2ClF into the soln.; react. time 3 h; slowly (ca.20 h) condension; cooling; crystn.; washing; removed volatile materials by evacuation; subjected to vac. for <0.2 h; elem. anal.; | 100% |
byproducts: AsF3; SO2 and AsF5 were condensed onto Se and I2; after 16 h no insoluble material was observed; condensation of SO2ClF onto the soln.; react. time 7 h; slowly (ca.20 h) condensation of solvent; cooling; crystn.; washing; removal of volatile material by evacuation; elem. anal.; | 104 % |
Conditions | Yield |
---|---|
AsF5 was condensed onto a mixture of Se and I2 in liq. SO2; react. time 4 h; slowly (ca.20 h) condensation of solvent; crystn.; after 16 h removal of volatile material by evacuation; elem. anal.; X-ray diffraction; | 100% |
AsF5 was condensed onto a mixture of Se and I2 in liq. SO2; react. time 6 h; slowly (ca.20 h) condensation; crystn.; after 16 h removal of volatile materials by evacuation; elem. anal.; X-ray diffraction; | 106 % |
selenium
bis(pentafluorophenyl)telluride
bis(perfluorophenyl) selenide
Conditions | Yield |
---|---|
at 320°C, heating in vacuum; | 100% |
at 320°C, heating in vacuum; | 100% |
selenium
copper
Conditions | Yield |
---|---|
In neat (no solvent) K2Se, Cu, Th, and Se reacted at 850°C; | 100% |
selenium
n-butyllithium
1,2-dicarba-closo-dodecaborane(12)
Conditions | Yield |
---|---|
In diethyl ether; hexane byproducts: C4H10; addn. of hexane soln. to Et2O soln. of carborane, addn. of selenium; not isolated; | 100% |
In diethyl ether in Et2O soln. according to X. Y. Yu et al., Organometallics, vol. 21 (2002), p. 5540; | |
In hexane | |
Stage #1: n-butyllithium; 1,2-dicarba-closo-dodecaborane(12) In diethyl ether for 0.5h; Inert atmosphere; Schlenk technique; Stage #2: selenium In diethyl ether at 0℃; Inert atmosphere; Schlenk technique; |
selenium
dibromo(2,4,6-tris[bis(trimethylsilyl)methyl]phenyl)(2,4,6-tricyclohexylphenyl)stannane
5-(2,4,6-tricyclohexylphenyl)-5-[2,4,6-tris[bis(trimethylsilyl)methyl]phenyl]-1,2,3,4,5-tetraselenastannolane
Conditions | Yield |
---|---|
With lithium naphthalenide In tetrahydrofuran (Ar); lithium naphthalenide in THF added a THF soln. of Sn compd. at -65°C, stirred for 1.5 h at this temp., treated with Se at -70°C, stirred overnight while warming to room temp.; solvent-removed, subjected to column chromy. (Florisil/CH2Cl2), HPLC, recrystd. (CH2Cl2/MeCN); elem. anal.; | 100% |
(diphenylphosphin)ferrocene
selenium
ferrocenyl(diphenyl)phosphine selenide
Conditions | Yield |
---|---|
In toluene Se (1.2 equiv.) added to soln. of Fe complex in toluene, mixt. stirred at 100°C for 1 h, cooled to room temp.; soln. filtered through Celite, filtrate dried under vac.; elem. anal.; | 100% |
In chloroform under Ar atm.; according to Allen, D. W., Taylor, B. F., J. Chem. Soc., Dalton Trans., 1982, 51; Fe-complex was boiled with Se for 5 h; excess of Se filtered off; solvent removed (vac.); elem. anal.; | 98% |
Conditions | Yield |
---|---|
With ascorbic acid In H2O byproducts: dehydroascorbic acid, H2O; selenium nanoparticles obtained by redn. of selenous acid with ascorbic acid; gravimetric anal.; | 96% |
In water Electrolysis; <30°C; steel cathode covered by amorphous Se; | |
pptn. of Se by reducing agents;; |
A
selenium
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide (Ar), treated dropwise with stirring, stirred for 16 h; filtered, concentrated, column chromatography on silica gel (pentane/CH2Cl2 (1:2)), recrystallized from hexane/chloroform at -25°C, elem. anal.; | A n/a B 92% |
titanocene pentaselenide
dimethyl acetylenedicarboxylate
A
selenium
B
[(C5H5)2TiSe2C2(CO2CH3)2]
Conditions | Yield |
---|---|
In xylene under N2, xylene soln. of Ti complex and dimethyl acetylenedicarboxylate refluxed for 0.5 h; cooled, filtered, Se washed with CH2Cl2, filtrate evapd. to oil, dissolved in small amt. of CH2Cl2, chromd., diluted with CH2Cl2, concd. in vac., cooled at -20°C, filtered; | A n/a B 90% |
In 1,2-dichloro-ethane Kinetics; under N2, soln. of Ti complex in 1,2-dichloroethane refluxed for 0.5 h,dimethyl acetylenedicarboxylate added to refluxing soln.; progress react. monitored by removing aliquots and recording visible spectrum, cooled soln. filtered, filtrate evapd. to dryness in high vac., residue dissolved in CH2Cl2, diluted with hexane, concd.; | A n/a B 77% |
Conditions | Yield |
---|---|
With sulfuric acid; potassium iodide In sulfuric acid byproducts: I2; sepn. of the formed I2 by distn.;; | 87.8% |
With sulfuric acid; potassium iodide In sulfuric acid byproducts: I2, H2O; storage at room temperature for 4 weeks;; | 38.4% |
With sodium hypophosphite In water heating for a longer period of time;; | >99 |
1-dibutylboryl-2-diphenylphosphino-1-butyl-2-phenylethene selenide
A
selenium
B
1-dibutylboryl-2-diphenylphosphino-1-butyl-2-phenylethene oxide
Conditions | Yield |
---|---|
In acetonitrile Electrolysis; under inert gas, Hg pool working electrode, Ag/AgNO3 reference electrode, Pt platelet as auxiliary electrode, base electrolyte Et4NClO4, electrolysis time 4 h, electrolysis current from 600-800mA at the start to 5 mA at the end; evapn. of soln. till ppt. of electrolyte appears, filtn., treating of filtrate with hexane, filtn., (31)P and (1)H NMR and IR detn. of compds.; | A 74% B 82% |
Conditions | Yield |
---|---|
With NH3; Na2SO3; N2H4*H2O In water Kinetics; byproducts: Zn(O,OH), Zn; 50°C; 15 min; pH 11.5; deposited on CuInS2; not isolated; detected by XPS; | A 5% B 79% |
With NH3; Na2SO3; N2H4*H2O In water Kinetics; byproducts: Zn(O,OH), Zn; 50°C; 15 min; pH 11.5; deposited on SnO2; not isolated; detected by XPS; | A 16% B 39% |
titanocene pentaselenide
hexafluoro-2-butyne
A
selenium
B
[(C5H5)2TiSe2C2(CF3)2]
Conditions | Yield |
---|---|
In xylene under N2, hexafluoro-2-butyne condensed into react. tube with Ti complex and xylene, sealed, annealed, tube heated at 150-160°C for 2 h; soln. filtered, filtrate evapd. to dryness, extd. with CH2Cl2, filteredto remove unreacted Ti complex, CH2Cl2 soln. diluted with hexane, concd., cooled to -20°C, filtered; | A n/a B 78% |
Conditions | Yield |
---|---|
With NH3; Na2SO3; N2H4*H2O In water Kinetics; byproducts: Zn(O,OH), Zn; 60°C; 20 min; pH 11.5; deposited on glass; not isolated; detected by XPS; | A 14% B 77% C 4% |
hydrogenchloride
A
selenium
B
diferrocenoyl selenide
C
diferrocenoyl diselenide
Conditions | Yield |
---|---|
With air In tetrahydrofuran at 21 - 25℃; for 24h; | A n/a B 62% C n/a |
selenous acid dimethyl ester
ammonia
A
selenium
B
selenium(IV) oxide
Conditions | Yield |
---|---|
In ammonia reaction of OSe(OCH3)2 with an excess of liq. NH3 in a bomb for 12 h;; evaporation of the excess of NH3; addn. of abs. ether; filtration; washing with H2O and 10% KCN soln.;; | A 5.3% B 45.8% C 48.8% |
Conditions | Yield |
---|---|
In ammonia reaction of OSe(OC2H5)2 with an excess of liq. NH3 in a bomb for 12 h;; evaporation of the excess of NH3; addn. of abs. ether; filtration; washing with H2O and 10% KCN soln.;; | A 5.3% B 45.8% C 48.8% |
In benzene byproducts: N2; dropwise addition of OSe(OCH2CH3)2 to dry benzene; introduction of NH3 into this solution;; sucking off; treatment with water and 10% KCN soln.; carefully dried at 105°C;; |
Conditions | Yield |
---|---|
In neat (no solvent, solid phase) heating of WSe2 single crystal flakes enclosed in envelopes made by thin Ta plates by passing current; | A 30% B n/a |
In neat (no solvent, solid phase) heating single crystal flakes of WSe2 by current in high vac.; |
Bis{bis(trifluormethyl)phosphanyl}-selan
iodine
A
selenium
B
iodo-bis-trifluoromethyl-phosphine
Conditions | Yield |
---|---|
Irradiation (UV/VIS); UV irradiation (6 h) in Pyrex bomb tube; | A n/a B 22% |
bis(4-methoxyphenyl)selenide
A
selenium
B
bis(4-methoxyphenyl)diselenide
C
methoxybenzene
Conditions | Yield |
---|---|
With hydrogen iodide In chloroform; water at 60℃; for 6h; | A 22% B 34 %Chromat. C 41.3 %Chromat. |
bis(4-methoxyphenyl)selenide
A
selenium
B
4-(4-hydroxyphenylselanyl)phenol
C
1,2-bis(4-hydroxyphenyl)diselane
D
phenol
Conditions | Yield |
---|---|
With pyridine hydrochloride at 200℃; for 0.833333h; | A 16% B n/a C n/a D n/a |
1,2,3,4,5-pentafluoro-6-iodobenzene
A
selenium
B
bis(pentafluorophenylseleno)mercury
Conditions | Yield |
---|---|
In further solvent(s) byproducts: (C6F5)2Se; Irradiation (UV/VIS); glyme; | A n/a B 15% |
In ammonia byproducts: (C6F5)2Se; Irradiation (UV/VIS); N2 atm.; -35°C, 2-72, evapn., extraction (CCl3F), evapn., sublimation, addn. of Hg, stirring (2 d); filtn., washing (CCl3F), extraction (CHCl3), recrystn. (CHCl3); | A n/a B 2.4% |
In neat (no solvent) byproducts: (C6F5)2Se; Irradiation (UV/VIS); | A n/a B 2% |
In ammonia byproducts: (C6F5)2Se; N2 atm.; -35°C, 20 min, evapn., extraction (CCl3F), evapn., sublimation, addn. of Hg, stirring (2 d); filtn., washing (CCl3F), extraction (CHCl3), recrystn. (CHCl3); | A n/a B 2.7% |
bromopentafluorobenzene
A
selenium
B
bis(pentafluorophenylseleno)mercury
Conditions | Yield |
---|---|
In ammonia byproducts: (C6F5)2Se; N2 atm.; -35°C, 20 min, evapn., extraction (CCl3F), evapn., sublimation, addn. of Hg, stirring (2 d); filtn., washing (CCl3F), extraction (CHCl3), recrystn. (CHCl3); | A n/a B 12.2% |
bromopentafluorobenzene
A
selenium
B
bis(pentafluorophenylseleno)mercury
Conditions | Yield |
---|---|
In tetrahydrofuran byproducts: (C6F5)2Se; Irradiation (UV/VIS); N2 atm.; -40 to 60°C, 3-4 h, evapn., stirring (12 h, 20°C), filtn., evapn., sublimation (vac.), addn. of Hg, stirring (2 d, 20°C); filtn., washing (CCl3F), extraction (CHCl3), recrystn. (CHCl3); | A n/a B 9.1% |
Conditions | Yield |
---|---|
In not given boiling for 50 h; | 1% |
1,2,3,4,5-pentafluoro-6-iodobenzene
A
selenium
B
bis(pentafluorophenylseleno)mercury
Conditions | Yield |
---|---|
In tetrahydrofuran byproducts: (C6F5)2Se; Irradiation (UV/VIS); N2 atm.; -40 to 60°C, 3-18 h, stirring (12 h, 20°C), filtn., evapn., sublimation, addn. of Hg, stirring (2 d); filtn., washing (CCl3F), extraction (CHCl3), recrystn. (CHCl3); | A n/a B 0.5% |
In tetrahydrofuran byproducts: (C6F5)2Se; N2 atm.; 20°C, 20 min, stirring (12 h, 20°C), filtn., evapn., sublimation, addn. of Hg, stirring (2 d, 20°C); filtn., washing (CCl3F), extraction (CHCl3), recrystn. (CHCl3); | A n/a B 0.6% |
potassium carbonate
diselenium dichloride
A
selenium
C
selenium oxychloride
Conditions | Yield |
---|---|
In melt byproducts: CO2; | |
In neat (no solvent) byproducts: CO2; Se2Cl2 and anhyd. K2CO3;; | |
In melt byproducts: CO2; | |
In neat (no solvent) byproducts: CO2; Se2Cl2 and anhyd. K2CO3;; |
Conditions | Yield |
---|---|
In sulfuric acid byproducts: H2O; Electrochem. Process; | |
In not given byproducts: H2O; Electrochem. Process; in diffusion layer of Hg cathode; | |
In sulfuric acid byproducts: H2O; aq. H2SO4; Electrochem. Process; |
Conditions | Yield |
---|---|
With sodium hydroxide In water byproducts: H2; Electrolysis; 30-75°C; pH=8; Pb cathode; effect of temp. and conc.; discussion of polarization curve against normal H-electrode; | |
With NaOH In water byproducts: H2; Electrolysis; 30-75°C; pH=8; Pb cathode; effect of temp. and conc.; discussion of polarization curve against normal H-electrode; |
Conditions | Yield |
---|---|
With sodium hydroxide; water In water Electrolysis; 30-75°C; Pt cathode; >8 g NaOH/l; | A 0% B n/a |
Conditions | Yield |
---|---|
With sodium hydroxide; water In water Electrolysis; 40-80°C; 6 h; steel cathode; 750-1250 A/m**2; |
Conditions | Yield |
---|---|
With sodium hydroxide; water In water Kinetics; Electrolysis; 40-80°C; steel cathode and anode; 250-1250 A/m**2; | |
With sodium hydroxide; water In water Electrolysis; 30-75°C; Pt cathode; 1.8-8 g NaOH/l; | |
With NaOH; H2O In water Kinetics; Electrolysis; 40-80°C; steel cathode and anode; 250-1250 A/m**2; |
Conditions | Yield |
---|---|
600°C; 3-5 h; | 100% |
580°C in evacuated quartz ampul; | |
In neat (no solvent) 3-zone furnace, heating (24 h, 800°C, vac., growth zone 1000°C), chemical vapor transport method using Br2 or ICl3, vac., gradient1050-1000°C; piezoreflectance measurement, XRD; |
Conditions | Yield |
---|---|
ratio of Se:B=2; 5 h at 850°C; | 100% |
ratio of Se:B=10; 10 h at 850°C; | 100% |
ratio of Se:B=2.5; 1 h at 850°C; | 100% |
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