2-Methylbut-2-en

Bezeichnung:2-Methylbut-2-en

CAS-Nr513-35-9

Englisch Name:2-Methyl-2-butene

CBNumberCB6853712

SummenformelC5H10

Molgewicht70.13

MOL-Datei513-35-9.mol

Synonyma

2-Methylbut-2-en

2-Methylbut-2-en physikalisch-chemischer Eigenschaften

Schmelzpunkt	-134 °C (lit.)
Siedepunkt	35-38 °C (lit.)
Dichte	0.662 g/mL at 25 °C (lit.)
Dampfdichte	2.4 (vs air)
Dampfdruck	25.7 psi ( 55 °C)
Brechungsindex	n20/D 1.385(lit.)
RTECS-Nr.	EM7580000
Flammpunkt	−4 °F
storage temp.	2-8°C
Löslichkeit	Chloroform, Methanol (Slightly)
Aggregatzustand	Liquid
Farbe	Colorless
Explosionsgrenze	8.7%
Wasserlöslichkeit	Miscible with alcohol, benzene, ligroin, ethylene oxide and ether. Immiscible with water.
Merck	14,607
BRN	1361353
Dielectric constant	2.1（20℃）
Stabilität	Volatile
LogP	2.67
CAS Datenbank	513-35-9(CAS DataBase Reference)
NIST chemische Informationen	2-Butene, 2-methyl-(513-35-9)
EPA chemische Informationen	2-Methyl-2-butene (513-35-9)

Sicherheit

Kennzeichnung gefährlicher	F,Xn,N,F+
R-Sätze:	11-22-65-51/53-12-36/37/38-19-68-67-38-52/53-40-36/37
S-Sätze:	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
Giftige Stoffe Daten	513-35-9(Hazardous Substances Data)

Gefahreninformationscode (GHS)

2-Methyl-2-butene Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R11:Leichtentzündlich.
R22:Gesundheitsschädlich beim Verschlucken.
R65:Gesundheitsschädlich: kann beim Verschlucken Lungenschäden verursachen.
R51/53:Giftig für Wasserorganismen, kann in Gewässern längerfristig schädliche Wirkungen haben.
R12:Hochentzündlich.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R19:Kann explosionsfähige Peroxide bilden.
S-Sätze Betriebsanweisung:
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
S9:Behälter an einem gut gelüfteten Ort aufbewahren.
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
S33:Maßnahmen gegen elektrostatische Aufladungen treffen.
S16:Von Zündquellen fernhalten - Nicht rauchen.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
Beschreibung
2-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.
Chemische Eigenschaften
2-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.
Verwenden
2-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.
Definition
ChEBI: 2-Methyl-2-butene is an alkene that is ethylene in which three of the hydrogens are replaced by methyl groups.
synthetische
2-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.
Allgemeine Beschreibung
2-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 Reaktionen
Highly flammable. Insoluble in water.
Reaktivität anzeigen
2-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.
Hazard
Highly flammable, dangerous fire and explosion risk.
Health Hazard
Inhalation 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.
läuterung methode
Distil 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
Research
2-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.
Einzelnachweise
Virginie 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 Upstream-Materialien And Downstream Produkte

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