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Cas Database

Name	2,3-Dimethyl-2-butene	EINECS	209-263-8
CAS No.	563-79-1	Density	0.697 g/cm³
PSA	0.00000	LogP	2.36260
Solubility	N/A	Melting Point	-75 °C
Formula	C₆H₁₂	Boiling Point	70.92 °C at 760 mmHg
Molecular Weight	84.1613	Flash Point	2°F
Transport Information	UN 3295 3/PG 2	Appearance	colourless liquid
Safety	16-33-62-9	Risk Codes	11-65
Molecular Structure		Hazard Symbols	F,Xn
Synonyms	1,1,2,2-Tetramethylethylene;2,3-Dimethyl-2-butene;NSC 73907;Tetramethylethene;Tetramethylethylene;	Article Data	304

2,3-Dimethyl-2-butene Synthetic route

: 563-78-0
2,3-Dimethyl-1-butene

: 563-79-1
2,3-Dimethyl-2-butene

Conditions

Conditions	Yield
aluminum oxide at -0.1℃; for 0.166667h;	95%
x In nitromethane at 25℃; for 0.25h;	88%
NiX(21) zeolite at -0.1℃; Rate constant; or ZnX(21) zeolite;

: 120-12-7
anthracene

: 188754-05-4
3,3'-bis(3-phenyl-1,1,2,2-tetramethyl-3-silacyclopropane)

A: 563-79-1
2,3-Dimethyl-2-butene

B: 3,3,4,4-Tetramethyl-1,2-diphenyl-3,4-dihydro-[1,2]disilete

C: C32H32Si2

Conditions

Conditions	Yield
In benzene at 150℃; for 2h;	A 70% B n/a C 85%

: 100-52-7
benzaldehyde

: 67-64-1
acetone

A: 563-79-1
2,3-Dimethyl-2-butene

B: 768-49-0
(2-methyl-1-propenyl)-benzene

C: 588-59-0
stilbene

Conditions

Conditions	Yield
With tin(IV) chloride; zinc In tetrahydrofuran at 64 - 66℃; for 1h; McMurry Reaction; Inert atmosphere;	A n/a B 85% C n/a

: 98-86-2
acetophenone

: 67-64-1
acetone

A: 563-79-1
2,3-Dimethyl-2-butene

B: 769-57-3
α,β,β-trimethylstyrene

C: 2510-98-7
2,3-diphenyl-2-butene

Conditions

Conditions	Yield
With tin(IV) chloride; zinc In tetrahydrofuran at 64 - 66℃; for 1h; McMurry Reaction; Inert atmosphere;	A n/a B 82% C n/a

: 67-64-1
acetone

: 563-79-1
2,3-Dimethyl-2-butene

Conditions

Conditions	Yield
With tin(IV) chloride; zinc In tetrahydrofuran at 64 - 66℃; McMurry Reaction; Inert atmosphere;	80%
With tungsten(VI) chloride In tetrahydrofuran Ambient temperature; electrolysis;	6%
With tetrahydrofuran; titanium(II) hydride; magnesium chloride In tetrahydrofuran at -68 - 20℃;	64 % Chromat.

: 119-61-9
benzophenone

: 67-64-1
acetone

A: 563-79-1
2,3-Dimethyl-2-butene

B: 781-33-9
2-methyl-1,1-diphenylpropene

C: 632-51-9
1,1,2,2-tetraphenylethylene

Conditions

Conditions	Yield
With tin(IV) chloride; zinc In tetrahydrofuran at 64 - 66℃; for 1h; McMurry Reaction; Inert atmosphere;	A n/a B 80% C n/a

: 55644-09-2
hexamethylsilirane

: 563-79-1
2,3-Dimethyl-2-butene

Conditions

Conditions	Yield
In benzene at 73℃; for 15h;	77%

: 52393-63-2
4,4,5,5-tetramethylethylene sulphate

: 563-79-1
2,3-Dimethyl-2-butene

Conditions

Conditions	Yield
In N,N-dimethyl-formamide at 20℃; Product distribution; electrolysis, oth. solvent, var. cathodes;	66%

: 55644-09-2
hexamethylsilirane

A: 563-79-1
2,3-Dimethyl-2-butene

B: 62346-42-3
octamethyl-1,2-disilacyclobutane

Conditions

Conditions	Yield
In benzene at 70℃; for 18h;	A 62% B 38%

: 513-81-5
2,3-dimethyl-buta-1,3-diene

: 563-79-1
2,3-Dimethyl-2-butene

Conditions

Conditions	Yield
With hydrogen; Et4N	60%
With bis(pentamethylcyclopentadienyl)titanium(III) hydride; hydrogen In (2)H8-toluene at 80℃; for 40h; Sealed tube;	20%
With diethyl ether; ammonia; sodium

2,3-Dimethyl-2-butene Chemical Properties

The molecular structure of 2-Butene, 2,3-dimethyl- (CAS NO.563-79-1) is

IUPAC Name: 2,3-Dimethylbut-2-ene
Molecular Formula: C₆H₁₂
Molecular Weight: 84.16
EINECS: 209-263-8
Density: 0.696 g/cm³
Melting Point: -75 ºC
Boiling Point: 70.9 °C at 760 mmHg
Flash Point: -16 ºC
Freely Rotating Bonds: 0
Polar Surface Area: 0 Å²
Index of Refraction: 1.404
Molar Refractivity: 29.58 cm³
Molar Volume: 120.7 cm³
Polarizability: 11.73 10^-24cm³
Surface Tension: 18.4 dyne/cm
Enthalpy of Vaporization: 29.64 kJ/mol
Vapour Pressure: 138 mmHg at 25°C
Stability: stable, highly flammable - readily forms explosive mixtures with air.
Properties: colourless liquid
The Cas Register Number of 2-Butene, 2,3-dimethyl- is 563-79-1. The chemical synonyms of 2-Butene, 2,3-dimethyl- (CAS NO.563-79-1) are (CH₃)₂C=C(CH₃)₂ ; 1,1,2,2-Tetramethylethylene ; 2,3-dimethyl-2-buten ; 2,3-dimethyl-but-2-ene ; 2,3-Dimethylbut-2-ene ; 2,3-Dimethylbutene-2 ; Tetramethylethene ; Tetramethylethylene . Its product categories are Acyclic ; Alkenes ; Organic Building Blocks .

2,3-Dimethyl-2-butene Uses

2-Butene, 2,3-dimethyl- (CAS NO.563-79-1) is used as organic intermediate.

2,3-Dimethyl-2-butene Safety Profile

Hazard Codes: F, Harmful Xn, Corrosive C
Risk Statements: 11-65-36/37/38-22-19
R11: Highly flammable. R65:Harmful: may cause lung damage if swallowed.
R36/37/38: Irritating to eyes, respiratory system and skin.
R22: Harmful if swallowed.
R19: May form explosive peroxides.
Safety Statements: 16-33-62-9-36/37/39-26
S16: Keep away from sources of ignition.
S33: Take precautionary measures against static discharges.
S62: If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label.
S9: Keep container in a well-ventilated place.
S36/37/39: Wear suitable protective clothing, gloves and eye/face protection.
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
RIDADR: UN 3295 3/PG 2
WGK Germany: 3
F: 10-23
Hazard Note: Extremely Flammable/Corrosive/Harmful
HazardClass: 3
PackingGroup: II
HS Code: 29012980

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