2-Methyl-2-butene

2-Methyl-2-butene Basic information
Product Name:2-Methyl-2-butene
Synonyms:2-Methyl-2-butene, =99%, purified by redistillation;2-Methyl-2-butene,86%;BETA-ISOPENTENE;Isoamylenes;2-METHYL-2-BUTENE MIN 88%;2-Methyl-2-butene, 99+%;2-Methyl-2-butene, balance 2-Methyl-1-butene, 90%;Androstenedoine
CAS:513-35-9
MF:C5H10
MW:70.13
EINECS:208-156-3
Product Categories:Building Blocks;Chemical Synthesis;Organic Building Blocks;Acyclic;Alkenes;Organic Building Blocks
Mol File:513-35-9.mol
2-Methyl-2-butene Structure
2-Methyl-2-butene Chemical Properties
Melting point -134 °C (lit.)
Boiling point 35-38 °C (lit.)
density 0.662 g/mL at 25 °C (lit.)
vapor density 2.4 (vs air)
vapor pressure 25.7 psi ( 55 °C)
refractive index n20/D 1.385(lit.)
RTECS EM7580000
Fp −4 °F
storage temp. 2-8°C
solubility Chloroform, Methanol (Slightly)
form Liquid
color Colorless
explosive limit8.7%
Water Solubility Miscible with alcohol, benzene, ligroin, ethylene oxide and ether. Immiscible with water.
Merck 14,607
BRN 1361353
Stability:Volatile
LogP2.67
CAS DataBase Reference513-35-9(CAS DataBase Reference)
NIST Chemistry Reference2-Butene, 2-methyl-(513-35-9)
EPA Substance Registry System2-Methyl-2-butene (513-35-9)
Safety Information
Hazard Codes F,Xn,N,F+
Risk Statements 11-22-65-51/53-12-36/37/38-19-68-67-38-52/53-40-36/37
Safety Statements 45-9-61-33-16-36/37/39-26-62-36/37
RIDADR UN 2460 3/PG 2
WGK Germany 3
TSCA Yes
HazardClass 3
PackingGroup II
HS Code 29012900
Hazardous Substances Data513-35-9(Hazardous Substances Data)
MSDS Information
ProviderLanguage
beta-IsoamyleneEnglish
SigmaAldrichEnglish
ACROSEnglish
ALFAEnglish
2-Methyl-2-butene Usage And Synthesis
Description2-Methyl-2-butene (also named as Amylene) is an alkene hydrocarbon with the molecular formula C5H10. It is a colorless to pale yellow clear liquid. It can be used as a free radical scavenger in trichloromethane and dichloromethane. It was used for the alkylation of 3-methylthiophene over a zeolitic catalyst. It was also used as a precursor of peroxyacetyl nitrate for calibration purpose.
Chemical Properties2-Methyl-2-butene is a colorless volatile liquid with unpleasant odour (detection limit ca. 2 ppt) . soluble in alcohol, ether, benzene, insoluble in water. It is used in organic synthesis, hydrogenation, halogenation, alkylation, condensation reactions.
Uses2-Methyl-2-butene is used to prepare 3-Brom-2.3-dimethyl-1.1-dicyan-butan in the presence of 2,2′-azobis-(2,4-dimethyl-4-methoxyvaleronitrile) as a catalyst. It may be employed as precursor for peroxyacetyl nitrate for the calibration purposes.
Preparation2-methyl-2-butene is prepared by dehydration of tert-amyl alcohol in presence of p-toluenesulfonic acid or distillation of a catalytically cracked gasoline stream, followed by extraction with aqueous sulfuric acid at low temp.
DefinitionChEBI: 2-Methyl-2-butene is an alkene that is ethylene in which three of the hydrogens are replaced by methyl groups.
General Description2-methyl-2-butene appears as a clear colorless liquid with a petroleum-like odor. Less dense than water and insoluble in water. Hence floats on water. Vapors heavier than air.
Air & Water ReactionsHighly flammable. Insoluble in water.
Reactivity Profile2-Methyl-2-butene may react vigorously with strong oxidizing agents. May react exothermically with reducing agents to release gaseous hydrogen. In the presence of various catalysts (such as acids) or initiators, may undergo exothermic polymerization reactions.
HazardHighly flammable, dangerous fire and explosion risk.
Health HazardInhalation or contact with material may irritate or burn skin and eyes. Fire may produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution.
Purification MethodsDistil amylene and collect the distillate at low temperature. It has also been distilled from sodium. FLAMMABLE. It is available in steel cylinders and has a short
Research2-Methyl-2-butene is a trisubstituted olefin. It acts as guest and forms stable solid host-guest complexes with self-assembled benzophenone bis-urea macrocycles. The impact of active chlorine on photo-oxidation of 2-methyl-2-butene was studied. Photosensitized oxidation of 2-methyl-2-butene adsorbed on internal framework of Na-ZSM-5 zeolite was studied. Gas-phase reaction of 2-methyl-2-butene with ozone has been investigated. Kinetics of liquid-phase alkylation of 3-methylthiophene with 2-methyl-2-butene on supported phosphoric acid has been reported.
ReferencesVirginie Bellière, Christophe Geantet, Michel Vrinat, Younès Ben-Taarit, Yuji Yoshimura, Alkylation of 3-Methylthiophene with 2-Methyl-2-butene over a Zeolitic Catalyst, Energy & Fuels, 2004, vol. 18, pp. 1806-1813
D. Grosjean, Gas-phase reaction of ozone with 2-methyl-2-butene: dicarbonyl formation from Criegee biradicals, Environmental Science & Technology, 1990, vol. 24, pp. 1428-1432
2-Methyl-2-butene Preparation Products And Raw materials
Raw materialsIsoprene–>3-Methyl-1-butene–>C5 Fraction–>p-tert-amyl aniline–>3,3-Dimethylcyclobutene–>1,1-dimethylcyclobutane–>1,2,4-Trimethylbenzene–>2-Butene–>2-METHYL-1-BUTENE–>CIS-1,3-PENTADIENE
Preparation ProductsTriadimefon–>β-Carotene–>pinacolone,tert-butyl methy1 ketone,3,3-dimethyl-2-butyl ketone–>N,N-DiMethylMethyleneaMMoniuM Iodide–>2,2-Dimethylbutyric acid–>CIS-3,4-DIMETHYL-2-PENTENE–>3,4,4-TRIMETHYLCYCLOPENT-2-ENONE–>1,1,2,3,3-pentamethylindan–>3-ETHYL-2-PENTENE–>2-METHYL-2-PENTENE–>2-METHYL-2-BUTANETHIOL

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