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Lithium selenide(Li2Se)Appearance:Off white to slight yellow solid Storage:Store in dry and cool condition Package:25kg or according to cutomer's demand Application:Chemical research/Pharmaceutical intermediates Transportation:By Sea,by Air,By courie
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Lithium selenide(Li2Se)Appearance:Off white to slight yellow solid Storage:Stored in shaded, cool and dry places Package:1L 5L 10L 25L bottle Application:pharma intermediate Transportation:Handle with cares to avoid damaging the packages. Protect the
Conditions | Yield |
---|---|
In ammonia addn. of Se to a soln. of Li in liq. NH3 at -33°C, formation of Li2Se;; | |
In ammonia -33°C, fast reaction;; | |
In ammonia NH3 (liquid); react. of Li and Se in liq. NH3; |
Conditions | Yield |
---|---|
In ammonia NH3 (liquid); react. of the components in a 1:16 Li:Se8 ratio (Ar); evapn. of the liq. NH3 in a dry and oxygen-free Ar-stream and washing with THF; |
Conditions | Yield |
---|---|
In tetrahydrofuran (Ar); addn. of selenium to a soln. of boron compd. in THF with stirring; | |
In tetrahydrofuran Se powder (1.5 mmol) was added to a soln. of B-contg. compd. in THF; | |
In tetrahydrofuran byproducts: B(C2H5)3, H2; |
Conditions | Yield |
---|---|
In melt byproducts: polyselenides; treatment of Li2CO3 with H2Se;; not pure, containing max. 92 % Li2Se;; |
lithium selenide
Conditions | Yield |
---|---|
In melt byproducts: H2O, polyselenides; heating in stream of H2;; not pure, containing max. 92 % Li2Se;; |
lithium selenide
Conditions | Yield |
---|---|
With pyrographite In melt byproducts: polyselenides; not pure, containing max. 92 % Li2Se;; | |
With coal |
lithium triethylborohydride
lithium selenide
Conditions | Yield |
---|---|
In tetrahydrofuran |
Conditions | Yield |
---|---|
With air at 20℃; for 0.5h; |
Conditions | Yield |
---|---|
at 750℃; under 0.000750075 Torr; Inert atmosphere; Glovebox; Sealed tube; |
selenium
lithium selenide
Conditions | Yield |
---|---|
In melt (N2, glovebox) Li2Se, Na2Se, As and Se were loaded into a fused-silica tube, the tube was flame-sealed under vac. and melted over a flame until all mixt. became a black melt, quenched in water; EDS, SEM; | A n/a B 98% |
Conditions | Yield |
---|---|
In melt (N2, glovebox) Li2Se, As and Se were loaded into a fused-silica tube, the tube was sealed under vac. and inserted into a programmable furnace, the temp. was increased from 50 to 500°C in 5 h, held for 2 h; quenched in water, the tube was carefully breaked; EDS, SEM; | 98% |
Conditions | Yield |
---|---|
In melt (N2, glovebox) Li2Se, As and Se in a sealed silica-tube was inserted into a programmable furnace, the temp. was increased from 50 to 500°C in 5 h, held for 10 h, cooled at a rate of 10°C/h to 250°C, cooled in air; EDS, SEM; | 96% |
In melt (N2, glovebox) Li2Se, As and Se were loaded into a fused-silica tube, and melted over a flame until all mixt. became a black melt, air-cooled; powder X-ray diffraction; | 94% |
selenium
lithium selenide
Conditions | Yield |
---|---|
In melt (N2, glovebox) Li2Se, Na2Se, As and Se were loaded into a fused-silica tube, the vac.-sealed tube was inserted into a furnace, the temp. was increased from 50 to 500°C in 5 h, held for 10 h, cooled, 10°C/h to 250°C, cooled in air; EDS, SEM; | A n/a B 93% |
Conditions | Yield |
---|---|
In tetrahydrofuran at -78 - 20℃; Inert atmosphere; Schlenk technique; | 93% |
lithium selenide
Conditions | Yield |
---|---|
In acetone inert atmosphere; stoich. amts., stirring for 15 min; filtration, partial evapn., layering with Et2O; | 92% |
lithium selenide
Conditions | Yield |
---|---|
In acetonitrile (N2); | 87% |
lithium selenide
1,3-bis(dimethylstanna)-2-selena-[3]ferrocenophane
Conditions | Yield |
---|---|
In tetrahydrofuran Ar-atmosphere; stirring equimolar amts. for 2 h; solvent removal (vac.), dissoln. in hexane, filtration, evapn., chromy. (SiO2, CH2Cl2/hexane=1:1); | 85% |
lithium selenide
Conditions | Yield |
---|---|
In tetrahydrofuran at -78 - 20℃; for 3h; Inert atmosphere; Schlenk technique; | 78% |
lithium selenide
W(CO)2(S2C2(C6H5)2)2
tetraethylammonium chloride
Conditions | Yield |
---|---|
In acetonitrile byproducts: CO; N2-atmosphere; stirring W-complex with excess Li2Se fir 1 d, addn. of 2 equiv. Et4NCl, stirring for 10 min; filtration, pptn. on ether addn., collection (filtration), recrystn. (MeCN/ether); elem. anal.; | 76% |
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide a mixt. in DMF was stirred at 293 K for 2 h under N2; N2, filtered, layered with diethyl ether; elem. anal.; | 76% |
lithium selenide
[2,6-(Me2NCH2)2C6H3](Ph)SnCl2
Conditions | Yield |
---|---|
In tetrahydrofuran (Ar, Schlenk) a soln. of Sn-complex in THF was added dropwise to a soln.of Li2Se in THF at room temp., stirred for 14 h at room temp.; evapd. in vac., the residue was suspd. in toluene, stirred for 10 min, filtered, evapd. in vac., the residue was washed with n-pentane; elem. anal.; | 76% |
Conditions | Yield |
---|---|
With N(C2H5)3 In N,N-dimethyl-formamide stirred for 1 h; filtered, diluted with diethyl ether; elem. anal.; | 75% |
bis(xanthogenato)-platinum(II)
lithium selenide
tetraphenyl phosphonium chloride
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide N2 atmosphere; molar ratio Li2Se : Se : Pt : PPh4Cl = 3:12:2:1, stirring (1h); filtration, layering with ether, crystn. (-40°C, 1 week), addn. of ether to the filtrate gives a mixt. of α and β form which is manually sepd.; elem. anal.; | A 75% B n/a |
Conditions | Yield |
---|---|
at 650℃; Inert atmosphere; | 72% |
at 650℃; Inert atmosphere; | 65% |
Conditions | Yield |
---|---|
In tetrahydrofuran; toluene byproducts: LiCl; toluene soln. of Ph2SnCl2 was added to THF soln. of Li2Se, mixt. was stirred overnight; solvent was removed, toluene was added, mixt. was filtered, filtrate wasevapd., ppt. was recrystd. from toluene/hexane; NMR, XRD; | 70% |
Conditions | Yield |
---|---|
With P(C6H5)4Br In N,N-dimethyl-formamide a mixt. in DMF was allowed to stand at 293 K overnight under N2; elem. anal.; | 70% |
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide a mixt. in DMF was stirred at 293 K for 3 days under N2; N2, filtered, layered with diethyl ether; | 66% |
lithium selenide
1,1'-bis[chloro(dimethylamino)boryl]ferrocene
1,3-bis(dimethylamino)-1,3-dibora-2-selena-[3]-ferrocenophane
Conditions | Yield |
---|---|
In tetrahydrofuran byproducts: LiCl; Ar-atmosphere; stirring at room temp. for 2 h; hexane addn., filtration off of LiCl, solvent removal; | 65% |
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide a mixt. in DMF was allowed to stand at 293 K overnight under N2; elem. anal.; | 65% |
lithium selenide
1,1'-bis[bromo(diisopropylamino)boryl]ferrocene
1,3-bis(diisopropylamino)-1,3-dibora-2-selena-[3]-ferrocenophane
Conditions | Yield |
---|---|
In tetrahydrofuran byproducts: LiBr; Ar-atmosphere; slow addn. of Li2Se to Fe-complex at 0°C, stirringat room temp. for 2 h; solvent removal (vac.), dissoln. in hexane, filtration off of LiBr, crystn. (-20°C); | 64% |
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide a mixt. in DMF was stirred at 293 K for 2 h under N2; N2, filtered, layered with diethyl ether; elem. anal.; | 64% |
lithium selenide
(pentamethylcyclopentadienyl)dibromo(nitrosyl)osmium(II)
Cp(*)2Os2(NO)2(μ-Se)2
Conditions | Yield |
---|---|
In tetrahydrofuran stirring at room temp. for 2-3 d; evapn., chromy. (SiO2, CH2Cl2), recrystn. (THF/hexane or PhMe/hexane, -25°C); | 63.3% |
lithium selenide
bis(O-ethyl dithiocarbonato-κ2S,S')palladium(II)
tetraethylammonium chloride
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide N2 atmosphere; molar ratio Li2Se : Se : Et4NCl : Pd-compd. = 3:12:2:1, stirring (1 h); filtration, layering with ether, crystn. (-40°C, 1 week); elem. anal.; | 62% |
Conditions | Yield |
---|---|
In acetonitrile at 20℃; for 1h; | 61% |
lithium selenide
bis(O-ethyl dithiocarbonato-κ2S,S')palladium(II)
tetraphenyl phosphonium chloride
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide under N2; mixture of Li2Se, Se and PPh4Cl was stirred; addn. of solved Pd-complex; stirred for 1 h; filtration; filtrate was diluted (Et2O); kept at 25°C for 2 days; crystn.; elem. anal.; NMR; | 60% |
lithium selenide
Conditions | Yield |
---|---|
In tetrahydrofuran react. (Mo(η1-CCl)(CO)2(HB(3,5-Me2-C3HN2)3)) with Li2Se in tetrahydrofuran; isolated as teraethylammonium salt; elem. anal.; | 60% |
lithium selenide
Conditions | Yield |
---|---|
In tetrahydrofuran (N2); mixture is stirred for 3 h; ppt. is collected, dissolved in acetonitrile, ether is slowly diffused for 4 d, crystals are collected, washed (ether); | 59% |
lithium selenide
Tetrapropylammonium chloride
Conditions | Yield |
---|---|
In tetrahydrofuran (N2); mixture is stirred for 30 min; ppt. is collected, dissolved in DMF, slow diffusion of ether for 3 d, crystals are collected; | 57% |
Conditions | Yield |
---|---|
With lithium triethylborohydride In tetrahydrofuran at 20℃; | 56% |
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