Names | |
---|---|
Preferred IUPAC name
2,3-Dimethylbut-2-ene | |
Identifiers | |
3D model (
JSmol)
|
|
ChemSpider | |
ECHA InfoCard | 100.008.422 |
EC Number |
|
PubChem
CID
|
|
UNII | |
CompTox Dashboard (
EPA)
|
|
| |
| |
Properties | |
C6H12 | |
Molar mass | 84.162 g·mol−1 |
Appearance | colorless liquid |
Density | 0.7075 g/cm3 (20 °C) |
Melting point | −74.6 °C (−102.3 °F; 198.6 K) |
Boiling point | 73.3 °C (163.9 °F; 346.4 K) |
Critical point (T, P) | 521.0(9) K, 3.4(1) MPa [1] |
insoluble | |
Solubility | soluble in ethanol, ether, acetone, chloroform [1] |
−65.9×10−6 cm3·mol−1 [1] | |
Refractive index (nD)
|
1.4122 (20 °C) [1] |
Thermochemistry [1] | |
Heat capacity (C)
|
174.7 J·mol−1·K−1 |
Std molar
entropy (S⦵298) |
270.2 J·mol−1·K−1 |
Std enthalpy of
formation (ΔfH⦵298) |
−101.4 kJ·mol−1 (liquid) −68.1 kJ·mol−1 (gas) |
Enthalpy of fusion (ΔfH⦵fus)
|
6.45 kJ·mol−1 (at melting point) |
Enthalpy of vaporization (ΔfHvap)
|
32.51 kJ·mol−1 (25 °C) 29.64 kJ·mol−1 (at boiling point) |
Hazards | |
GHS labelling: | |
Danger | |
H225, H304 | |
P210, P233, P240, P241, P242, P243, P280, P301+P310, P303+P361+P353, P331, P370+P378, P403+P235, P405, P501 | |
Flash point | −8 °C |
401 °C [1] | |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Tetramethylethylene is a hydrocarbon with the formula Me2C=CMe2 (Me = methyl). A colorless liquid, it is the simplest tetrasubstituted alkene.
It can be prepared by base-catalyzed isomerization of 2,3-dimethyl-1-butene. [2] Another route involves direct dimerization of propylene. [3] It can also be produced by photolysis of tetramethylcyclobutane-1,3-dione. [4]
Tetramethylethylene forms metal-alkene complexes with low-valent metals and reacts with diborane to give the monoalkyborane known as thexylborane. [5] [6]
Oxidation gives pinacol.
It is a precursor to the herbicide fenpropathrin. [3]
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cite book}}
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link) CS1 maint: others (
link)
{{
cite journal}}
: CS1 maint: multiple names: authors list (
link)
Names | |
---|---|
Preferred IUPAC name
2,3-Dimethylbut-2-ene | |
Identifiers | |
3D model (
JSmol)
|
|
ChemSpider | |
ECHA InfoCard | 100.008.422 |
EC Number |
|
PubChem
CID
|
|
UNII | |
CompTox Dashboard (
EPA)
|
|
| |
| |
Properties | |
C6H12 | |
Molar mass | 84.162 g·mol−1 |
Appearance | colorless liquid |
Density | 0.7075 g/cm3 (20 °C) |
Melting point | −74.6 °C (−102.3 °F; 198.6 K) |
Boiling point | 73.3 °C (163.9 °F; 346.4 K) |
Critical point (T, P) | 521.0(9) K, 3.4(1) MPa [1] |
insoluble | |
Solubility | soluble in ethanol, ether, acetone, chloroform [1] |
−65.9×10−6 cm3·mol−1 [1] | |
Refractive index (nD)
|
1.4122 (20 °C) [1] |
Thermochemistry [1] | |
Heat capacity (C)
|
174.7 J·mol−1·K−1 |
Std molar
entropy (S⦵298) |
270.2 J·mol−1·K−1 |
Std enthalpy of
formation (ΔfH⦵298) |
−101.4 kJ·mol−1 (liquid) −68.1 kJ·mol−1 (gas) |
Enthalpy of fusion (ΔfH⦵fus)
|
6.45 kJ·mol−1 (at melting point) |
Enthalpy of vaporization (ΔfHvap)
|
32.51 kJ·mol−1 (25 °C) 29.64 kJ·mol−1 (at boiling point) |
Hazards | |
GHS labelling: | |
Danger | |
H225, H304 | |
P210, P233, P240, P241, P242, P243, P280, P301+P310, P303+P361+P353, P331, P370+P378, P403+P235, P405, P501 | |
Flash point | −8 °C |
401 °C [1] | |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Tetramethylethylene is a hydrocarbon with the formula Me2C=CMe2 (Me = methyl). A colorless liquid, it is the simplest tetrasubstituted alkene.
It can be prepared by base-catalyzed isomerization of 2,3-dimethyl-1-butene. [2] Another route involves direct dimerization of propylene. [3] It can also be produced by photolysis of tetramethylcyclobutane-1,3-dione. [4]
Tetramethylethylene forms metal-alkene complexes with low-valent metals and reacts with diborane to give the monoalkyborane known as thexylborane. [5] [6]
Oxidation gives pinacol.
It is a precursor to the herbicide fenpropathrin. [3]
{{
cite book}}
: CS1 maint: location missing publisher (
link) CS1 maint: others (
link)
{{
cite journal}}
: CS1 maint: multiple names: authors list (
link)