n-butyllithium
N-(1-phenylethyl)-N-(prop-2-yn-1-yl)amine
A
N-(α-methylbenzyl)pentylamine
B
dilithium acetylide
Conditions | Yield |
---|---|
Stage #1: n-butyllithium; N-(1-phenylethyl)-N-(prop-2-yn-1-yl)amine at 20℃; Stage #2: With methanol | A 80% B n/a |
thiophene
N-(1-phenylethyl)-N-(prop-2-yn-1-yl)amine
B
dilithium acetylide
Conditions | Yield |
---|---|
Stage #1: thiophene; N-(1-phenylethyl)-N-(prop-2-yn-1-yl)amine With lithium diisopropyl amide In diethyl ether at 0 - 20℃; Stage #2: With methanol | A 78% B n/a |
2-Methylthiophene
N-(1-phenylethyl)-N-(prop-2-yn-1-yl)amine
B
dilithium acetylide
Conditions | Yield |
---|---|
Stage #1: 2-Methylthiophene; N-(1-phenylethyl)-N-(prop-2-yn-1-yl)amine With lithium diisopropyl amide In diethyl ether at 0 - 20℃; Stage #2: With methanol | A 77% B n/a |
n-butyllithium
A
N-(α-methylbenzyl)pentylamine
B
dilithium acetylide
Conditions | Yield |
---|---|
Stage #1: n-butyllithium; N-(α-methylbenzyl)-3-(trimethylsilyl)-2-propynylamine at 20℃; Stage #2: With methanol | A 71% B n/a |
n-butyllithium
N-(prop-2-yn-1-yl)cyclohexanamine
A
N,N-cyclohexyl-n-pentylamine
B
dilithium acetylide
Conditions | Yield |
---|---|
Stage #1: n-butyllithium; N-(prop-2-yn-1-yl)cyclohexanamine at 20℃; Stage #2: With methanol | A 70% B n/a |
tetrachloromethane
lithium
B
ethenetetrayl-tetrakis-lithium
C
dilithium acetylide
Conditions | Yield |
---|---|
In neat (no solvent) reaction of an excess of gaseous Li with gaseous CCl4 at 800-1000°C (high vac.);; | A 10-18 B 61% C 20% |
Conditions | Yield |
---|---|
Stage #1: furan; N-(1-phenylethyl)-N-(prop-2-yn-1-yl)amine With lithium diisopropyl amide In diethyl ether at 0 - 20℃; Stage #2: With methanol | A 58% B n/a |
N-(1-phenylethyl)-N-(prop-2-yn-1-yl)amine
tert.-butyl lithium
B
dilithium acetylide
Conditions | Yield |
---|---|
Stage #1: N-(1-phenylethyl)-N-(prop-2-yn-1-yl)amine; tert.-butyl lithium at 20℃; Stage #2: With methanol | A 50% B n/a |
N-(1-phenylethyl)-N-(prop-2-yn-1-yl)amine
phenyllithium
A
N-benzyl-1-phenylethylamine
B
dilithium acetylide
Conditions | Yield |
---|---|
Stage #1: N-(1-phenylethyl)-N-(prop-2-yn-1-yl)amine; phenyllithium at 20℃; Stage #2: With methanol | A 39% B n/a |
2-thienyl lithium
N-(1-phenylethyl)-N-(prop-2-yn-1-yl)amine
B
dilithium acetylide
Conditions | Yield |
---|---|
Stage #1: 2-thienyl lithium; N-(1-phenylethyl)-N-(prop-2-yn-1-yl)amine at 20℃; Stage #2: With methanol | A 38% B n/a |
2-lithiofuran
N-(1-phenylethyl)-N-(prop-2-yn-1-yl)amine
A
(RS)-N-(furan-2-ylmethyl)-N-(α-methylbenzyl)amine
B
dilithium acetylide
Conditions | Yield |
---|---|
Stage #1: 2-lithiofuran; N-(1-phenylethyl)-N-(prop-2-yn-1-yl)amine With lithium diisopropyl amide In diethyl ether at 0 - 20℃; Stage #2: With methanol | A 29% B n/a |
methyllithium
A
methane
B
dilithiomethane
C
propadienetetrayl-tetrakis-lithium
D
dilithium acetylide
Conditions | Yield |
---|---|
at 223 - 226℃; Yield given. Yields of byproduct given; |
cis-1,2-Dilithioethylen
A
vinyllithium
B
dilithium acetylide
Conditions | Yield |
---|---|
Title compound not separated from byproducts; |
trans-1,2-Dilithioethylen
A
vinyllithium
B
dilithium acetylide
Conditions | Yield |
---|---|
Title compound not separated from byproducts; |
Conditions | Yield |
---|---|
With dilithiumethylene Title compound not separated from byproducts; |
Conditions | Yield |
---|---|
With n-butyllithium In tetrahydrofuran; diethyl ether for 2h; Ambient temperature; | |
With n-butyllithium In tetrahydrofuran |
Conditions | Yield |
---|---|
With n-butyllithium In hexane at -10℃; for 0.75h; Yield given; |
Conditions | Yield |
---|---|
In melt Electrolysis; graphite electrodes, graphite dissoln. in molten Li (temp.>600°C); |
Conditions | Yield |
---|---|
In neat (no solvent, solid phase) heated at 900°C for 12 h in Nb ampoule; |
Conditions | Yield |
---|---|
In hexane inert atmosphere, diln. of soln. of n-BuLi with freshly distilled hexane, cooling to -15°C, passing of HCCH through the soln. at a temp. below -10°C, further bubbling of HCCH through the soln. (0.5 h), warming to room temp., reflux (2 h); filtration, reduction of volume (vacuum), washing (hexane), filtration, drying (60°C, 0.5 Torr), yield 82%; |
Conditions | Yield |
---|---|
In melt byproducts: LiCl, NbCl4; compds. melted in quartz-glass ampoule at 530°C for 15 h; slowly (36 h) cooled to 300°C, washed with i-PrOH; | 90% |
1,5-dichlorodecamethylpentasilane
dilithium acetylide
3,3,4,4,5,5,6,6,7,7-decamethyl-3,4,5,6,7-pentasilacycloheptyne
Conditions | Yield |
---|---|
80% |
dilithium acetylide
(diethylamino)dimethylsilyl-triflat
Conditions | Yield |
---|---|
In diethyl ether for 0.5h; Ambient temperature; | 78% |
trimethyltin(IV)chloride
dilithium acetylide
bis(trimethyltin)acetylene
Conditions | Yield |
---|---|
In pentane byproducts: LiCl; inert atmosphere, addn. of soln. of (CH3)3SnCl to suspension of Li2C2 at-25°C (40 min), warming to room temp., reflux (1 h); filtration from LiCl, concn., recrystn. (pentane, -78°C), drying (40°C, 5 Torr); | 76% |
Conditions | Yield |
---|---|
In tetrahydrofuran; N,N,N,N,N,N-hexamethylphosphoric triamide rt, 16 h; reflux, 2 h; | 72% |
3-(tert-butyldimethylsilyloxy)propyl bromide
dilithium acetylide
1-(tert-butyldimethylsilyloxy)-4-pentyne
Conditions | Yield |
---|---|
In dimethyl sulfoxide at 0℃; | 68.5% |
Conditions | Yield |
---|---|
In diethyl ether at 25℃; for 3h; | 66% |
1,4-dichloropermethyltetrasilane
dilithium acetylide
octamethyltetrasilacyclohexyne
Conditions | Yield |
---|---|
65% |
Conditions | Yield |
---|---|
In pentane Ar atmosphere, addn. of soln. of (CH3)3SnBr to suspension of Li2C2 at -25°C (40 min), warming to room temp., reflux (1 h); filtration from LiCl, concn., recrystn. (pentane, -78°C), drying (40°C, 5 Torr); | 64% |
dilithium acetylide
1,2-bis<2-(chlorodimethylsilyl)ethyl>-1,1,2,2-tetramethyldisilane
3,3,6,6,7,7,10,10-octamethyl-3,6,7,10-tetrasilacyclodecyne
Conditions | Yield |
---|---|
In tetrahydrofuran Ambient temperature; | 62.2% |
dilithium acetylide
Conditions | Yield |
---|---|
In tetrahydrofuran (Ar), at room temp. for 12 h; washed (brine), evapd., rinzed (CH2Cl2), recrystd.(THF), elem. anal.; | 42% |
dilithium acetylide
Conditions | Yield |
---|---|
In tetrahydrofuran under Ar atm. using Schlenk techniques; LiCCLi transferred to THF soln. of Ru complex; stirred at room temp. overnight; to the ice-chilled soln. added satd. aq. soln. of NaCl; org. layer sepd.; washed aq. satd. soln. of NaCl; dried (Na2SO4); solvent removed; ppt. collected by filtration; washed (CH2Cl2); residue dried (vac.) overnight; elem. anal.; | 42% |
1,2-bis[2-(chlorodimethylgermyl)ethyl]-1,1,2,2-tetramethyldigermane
dilithium acetylide
3,3,6,6,7,7,10,10-octamethyl-3,6,7,10-tetragermacyclodecyne
Conditions | Yield |
---|---|
In tetrahydrofuran mixing of solns. of Li salt and Ge compound (room temp., 5 h), stirring (overnight); Kugelrohr distillation; | 23% |
bis(cyclopentadienyl)titanium dichloride
dilithium acetylide
trimethylphosphane
μ-(η1:η1-ethendiylidnene)-bis{bis(η5-cyclopentadienyl)(trimethylphosphane)titanium}
Conditions | Yield |
---|---|
With Mg In tetrahydrofuran Ar atmosphere; addn. of Li2C2 in THF to soln. of Ti compd. in THF (20°C), stirring (20°C, 12 h), addn. of PMe3 and Mg, warming (27°C), stirring (24 h); removal of solvent (0.5 Torr), addn. of toluene, filtration, removal of toluene (0.5 Torr), addn. of THF, standing (2 d), sepn., drying (Ar stream); not pure; | 20% |
dilithium acetylide
Conditions | Yield |
---|---|
With THF In tetrahydrofuran 30 min stirring, under Ar; concg., pptn. with diethylether, washing with ether, drying in vac.; elem.anal.; | 18% |
trimethyltin(IV)chloride
dilithium acetylide
acetylene
bis(trimethyltin)acetylene
Conditions | Yield |
---|---|
In hexane excess of C2H2; | 10% |
chlorotriethylstannane
dilithium acetylide
acetylene
A
triethylethynylstannane
B
bis(triethylstannyl)ethyne
Conditions | Yield |
---|---|
In hexane excess of C2H2; | A 10% B n/a |
trifluoromethylsulfonic anhydride
dilithium acetylide
cyclopenta-1,3-diene
Conditions | Yield |
---|---|
In diethyl ether at -20℃; | 1.3% |
Conditions | Yield |
---|---|
(i) , (ii) BrCN, NaOMe, (iii) EtCO2H; Multistep reaction; |
IUPAC: Dilithium acetylide
Lithium acetylide with CAS NO.of 1070-75-3 is also called for EINECS 213-980-1 ; CID66115 ; 1070-75-3 ; 1,2-Dilithioacetylene ; Dilithioacetylene ; Ethyne-1,2-diylbislithium ; Ethynylenebislithium and so on.
CAS: 1070-75-3
Molecular Formula: C2Li2
Molecular Weight: 37.9034
EINECS: 213-980-1
ACD/LogP: 0.37
ACD/LogD (pH 5.5): 0.37
ACD/LogD (pH 7.4): 0.37
ACD/BCF (pH 5.5): 1.13
ACD/BCF (pH 7.4): 1.13
ACD/KOC (pH 5.5): 37.87
ACD/KOC (pH 7.4): 37.87
H bond acceptors: 0
H bond donors: 0
Freely Rotating Bonds: 0
Heavy Atom Count: 4
Formal Charge: 0
Complexity: 12
Isotope Atom Count: 0
Defined Atom StereoCenter Count: 0
Undefined Atom StereoCenter Count: 0
Defined Bond StereoCenter Count: 0
Undefined Bond StereoCenter Count: 0
Covalently-Bonded Unit Count: 3
Enthalpy of Vaporization: 21.12 kJ/mol
Vapour Pressure: 69700 mmHg at 25°C
Density: 1.3 g/cm3
Melting Point: > 550°C
The molecular structure of Lithium acetylide with CAS NO.of 1070-75-3:
Lithium acetylide (CAS NO.1070-75-3) can be used in radiocarbon dating.
Lithium acetylide (CAS NO.1070-75-3) can be prepared from the following two ways:
1.molten lithium + graphite are reacted at high temperature
2.carbon dioxide + molten lithium
Ignites and burns vigorously in fluorine, chlorine, phosphorus, selenium, or sulfur vapors. Ignites when heated in bromine or iodine vapors. When heated to decomposition it emits acrid smoke and fumes. See also LITHIUM COMPOUNDS and ACETYLIDES.
Lithium acetylide with CAS NO.of 1070-75-3 is an ionic salt, it will transform reversibly to a cubic anti-fluorite structure at high temperatures.
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View